FR2542834A1 - ROLLER REDUCTION DEVICE FOR A VEHICLE ENGINE - Google Patents

Abstract

THE INVENTION CONCERNS THE MOUNTING STRUCTURES OF VEHICLE ENGINES. A DEVICE INTENDED TO REDUCE THE ROLL OF AN MOTOR INCLUDES IN PARTICULAR AN ENCLOSURE46, 47 CONTAINING A LIQUID AND DIVIDED INTO TWO PARTS BY A SEPARATOR DISK 41. THE DISC IS FIXED TO THE MOTOR AND THE WALLS OF THE TWO PARTS FACING THE DISK ARE FIXED TO THE VEHICLE CHASSIS, OR VERSATILE. THE DISC CONTAINS AN ORIFICE STRUCTURE48, 50, 59 WHICH ALLOWS SELECTIVE COMMUNICATION BETWEEN THE TWO PARTS, DEPENDING ON THE ANGLE OF THE ACCELERATOR PEDAL. APPLICATION TO AUTOMOTIVE CONSTRUCTION.

Description

The present invention relates to a reduction device

  roll for an engine that is able to electronically reduce and suppress roll

of an automobile engine.

  In an automobile in which the engine is mounted horizontally, it is subjected to a roll

  important because of the reaction to his

  expensive that the engine hits the walls of the compartment

  the engine and against various parts and

  in this compartment, depreciation is used

  The Roll Limiter has a structure in which an arm extending from the engine is in contact with a plate mounted on the body.

body of the vehicle.

  However, with the roll limiter of the prior art, the arm knocks against the plate due to the reaction to the engine torque, and the shock is transmitted to the body of the vehicle and harms the comfort Some

  Roll Limiters are made of heavy duty rubber

  to absorb even the low engine vibrations that occur in normal operation In this case, even shocks due to relatively weak

  engine torque are transmitted to the vehicle body

the, which is detrimental to comfort.

  An object of the invention is to provide a device

  roll reduction system for an engine, which is capable of

  to remove the roll of a motor by electronically varying the damping force, depending on the

  the value of the motor torque response.

  The invention provides a roll reduction device for an engine which comprises a liquid containing element, a separating element attached to the engine

  vehicle chassis and which divides the interior of the vehicle

  enclosed in two parts, mounting means for

  the walls of the two parts facing the separating element, the chassis of the vehicle or the engine, depending on whether the separating element is respectively fixed to the engine or to the chassis of the vehicle, an orifice structure formed

  in the separating element to control the communica-

  between the two parties, means of detecting

  the speed of opening closing the throttle butterfly

  tor, for determining whether the speed of variation of the angle of the accelerator pedal is greater than a predetermined value, and control means for operating the orifice structure to restrict communication between the two parts, for a predetermined duration, in response to a signal from the opening / closing speed detection means

throttle butterfly.

  Other features and advantages of the

  will be better understood by reading the description

  which will follow embodiments and with reference to the accompanying drawings in which:

  FIG. 1 is a plan view of a compartment

  Figure 2 is an elevational view showing a

  engine and an engine mounting structure in the

motor part of Figure 1;

  FIG. 3 is a section showing an amortization

  employed in a first embodiment of the invention.

vention;

  FIG. 4 is a plan view of the same damping

sor,

  FIG. 5A is a plan view of a rotary valve

  tative shown in Figure 4; Figure 5B is a section along line VI-VI of Figure 5A;

  Figure 6 is a graph showing a characteristic

  of elastic deformation, that is, the relationship between

  FIG. 7 is a schematic diagram of a control circuit of a second embodiment of the roll reduction device according to the present invention. FIG. 8 is a diagram of a control circuit of a third embodiment of the roll reduction device according to the invention;

  FIG. 9 is a diagram of a communication circuit.

  a fourth embodiment of the roll reduction device according to the invention;

  Figure 10 is a schematic representation of

  than a control circuit of a fifth embodiment of

  of the roll reduction device according to the invention.

  The figure is a diagram showing the structure

  detailed circuit diagram of the individual subsets shown in Figure 10; and

  Figures 12A and 12B are diagrams separated

  for the purpose of explaining the functioning of a

  cutting circuit in the fifth embodiment.

  We will now describe a first mode of

  embodiment of the invention with reference to FIGS. 1 to 6.

  FIG. 1 is a plan view of an engine compartment and FIG. 2 is an elevational view of a motor and an engine mounting structure in the compartment.

  In FIGS. 1 and 2, an engine block 2 is shown in FIG.

  mounted on a chassis 1 of a vehicle The engine block

  2 comprises a motor 3 and an automatic transmission 5.

  Motor 3 is supported by first and second dampers

  7 and 8, by a motor support 6 and by a transmission support 9 The first and second dampers 7 and 8 are respectively called front roll limiter and rear roll limiter They have the same structure, which means that will only describe in detail one of them

  Referring to FIGS. 3 to 6 FIG.

  sectional and elevational presentation of a shock absorber 7

  or 8 Considering this figure, we see that the depreciation

  includes a separator disc 41 which divides the inte-

  The separator disc 41 is attached to the chassis 1 of the vehicle (FIG. 1). Mounting screws 44 and 45 are attached to the two-piece damper, that is to say the upper and lower oil chambers 42 and 43. placed in the walls of the upper and lower oil chambers

  42 and 43, facing the separating disc 41 These screws are

  attached to an arm 10 which extends from the engine 3 The walls of the upper and lower oil chambers 42,

  43, in which are mounted the rods of the screws

  44 and 45, also define rooms for

  The upper oil chamber 42 is defined between the separator disc 41 and the upper bending chamber 46, and

  the lower oil chamber 43 is defined between the

  that separator 41 and the lower flexure chamber 47.

  The separating disc 41 has a diametrical bore 48 in which a rotary valve 50 is housed. The bore 48 comprises a part of large diameter 49 and a part of

  small diameter 52 The rotary valve 50 comprises a

  large diameter with a pointed end that is

  housed in the large diameter portion 49 of the bore 48.

  A small diameter portion 53 of the rotary valve 50

  slidably penetrates into the low di-

  meter 52 of bore 48 Part of large diameter 53 of

  the rotary valve 50 has an all-round communication hole

  ge 54 having a large opening and which extends in the direction

  The free end of the small-diameter portion 53 of the rotary valve 50 is coupled to an electromagnet 55. The electromagnet 55 can rotate the rotary valve 50 of 900 about its axis. left of the bore 48 is closed by

  a cap 56 provided with an O-ring 57

-542834

  41 has a large hole which is designed to coincide with the communication hole 54 of the rotary valve 50. It also has a small hole 58. The orifice bends 60 and 61, each having an orifice 59 of constant cross-section, and of constant length, are screwed into the upper and lower ends of the hole 58. The walls of the upper and lower flexure chambers 46 and 47 are on the side, facing the

  respective stop plates 62 and 63 These walls comprise

  Rubber protuberances 64 The protuberances

  these rubber 64 on each chamber wall of

  xion consist of rubber protuberances

  opposite, 64-1, having a relatively large height

  of three intermediate rubber protuberances 64-2 having a relatively low height, are placed with

  a uniform gap between the rubber protuberances

  bunch of opposite ends 64-1.

  The rotary valve 50, the electromagnet 55, the hole 58 and the orifice elbows 60 and 61 constitute the

orifice mechanism.

  We will now describe the operation of the

  first embodiment of the invention having the structure

  indicated above when the vehicle is traveling at a

  constant speed, the engine does not show any roll.

  In the absence of roll, the communication hole 54 in the rotary valve 50 is vertical, that is to say that the

  upper and lower oil chambers 42 and 43

  mutually through the communication hole 54, coinciding with the hole in the separator disk

  41, which has a relatively large section In this

  vibration of the engine 3 in the vertical direction

  the wedges are weakly damped by the mounting screws 44 and the upper and lower bending chambers 46 and 47 and the upper and lower oil chambers 42 and

  43, before being transmitted to the frame 1 of the vehicle

  that the amplitude of the vertical vibration of the motor 3

  Gradually, the rubber protuberances 64-1 first strike the abutment plates 62 and 63 and are then compressed by the latter. A further increase in the vibration amplitude of the motor has the effect of compressing the protuberances by Figure 6 shows the displacement of the upper and lower bending chambers 46 and 47

  slope of the curve shown increases gradually.

  It can be seen that a large increase in the load on the upper and lower bending chambers 46 and 47 can

  be absorbed with only one displacement value

weakly weak.

  When the accelerator pedal is depressed at a speed which exceeds a predetermined speed, to increase the throttle opening of the engine, the engine 3 tends to roll over due to the

  reaction to its torque When depressing the accelerator pedal

  with a speed exceeding a predetermined speed

  The electro-magnet 55 is energized to rotate the rotary valve 50 of 900. This has the effect of blocking the communication between the upper and lower oil chambers 42 and 43 by the rotary valve 50. upper and lower oil 42 and 43 can only communicate through port 59 In this state, the

  roll of motor 3 is heavily damped When the

  roll test is high, the rubber protuberances

  64 help cushion the roll.

  The roll of the engine 3 is damped some-

  After the start, the valve should

  tative 50 is turned from 900 to the position

  initial, after a few seconds the oil chambers

  the upper and lower 42 and 43 can thus again

  The vibration of the motor 3 is now weakly damped by the shock absorbers 7 and

  8 before being transmitted to chassis 1 of the vehicle.

  With the dampers described above, in the absence of roll of the engine 3, the vibrations of the engine in the vertical direction are absorbed to a large extent by the elastic deformation of the engine support 6, the transmission support 9, the chambers of upper and lower flexion 46 and 47 and the rubber protuberances 64, so that they are almost not transmitted to the chassis 1 of the vehicle On the other hand, while

  roll of the engine 3 is strongly damped by the resistance

  this offered by the fluid in the fluid path of the orifice 59, which prevents the motor 3 from striking other organs of the vehicle in the engine compartment, or the chassis of the vehicle can also avoid an inclination of the vehicle body under the effect of the roll of the engine 3 Moreover, because

  displacement of motor 3, it is also possible to reduce

  placement of pipes from the engine 3, such as the exhaust flue, the cooling water pipe and the fuel pipe, which is advantageous from the point

  effective use of the compartment's space.

motor.

  Although the above embodiment uses orifice bends 60 and 61, it is also possible to construct a rotary valve 50 having an orifice

  corresponding to the orifice 59, so as to be able to interrupt

  pre the communication between the upper and lower oil chambers 42 and 43 by the communication hole 54, all

  maintaining communication with the orifice when the wheel

  the engine rotates the rotary valve 50.

  However, the existence of the orifice bends 60 and 61 on the separator disk facilitates the choice of the diameter and the length of the orifice, and makes it possible to easily obtain the desired orifice characteristics, while allowing

to reduce the machining costs.

  We can also remove the cap 56 and,

  instead, sealing between the left end

  of the rotary valve 50 in FIG. 3 and the bore 48 with an O-ring.

  of the embodiment above, in which the

  wise 48 is closed by the plug 56 and the rotary valve

  has a tapered tip-shaped end

  facing the stopper 56, the size and the

  weight of the rotary valve 50, to facilitate its position-

  progressively and gradually

without resistance -

  Figure 7 shows a second mode of

  of the roll reduction device in accordance with the

  In this figure, the reference 71 designates an ignition coil, the reference 72 designates a switch and

  73 denotes a spark plug Under the ef-

  When closing and opening the switch 72, a high voltage is applied to the spark plug 73

  to produce sparks in the engine cylinder.

  In this embodiment, the rotation speed is detected.

  the engine from a signal that is produced in accordance

  in connection with the closing / opening operation of the switch 72.

  More specifically, a signal appearing at the point of con-

  connection between the ignition coil 71 and the switch 72 is applied to a motor rotation speed detection circuit, 74 The rotational speed detection circuit

  motor 74 produces a voltage proportional to the speed of

  It comprises a forming circuit 75, a pulse width determination circuit 76, a low-pass filter 77 and a comparator 78.

  formatting 75 formats the input voltage under

  impulse, to give it a frequency of impulses

  -the speed of rotation of the engine, the shaping

  taking the noise suppression The pulse width determination circuit 76 determines the pulse width of the pulse output signal of the pulse circuit.

  signal formatting 75, so that it is consistent

  aunt The pulse output signal from the cir-

  pulse width determination method 76 is

  Low-pass filter 77 The low-pass filter 77

  than the comparator 78 a voltage proportional to the

  speed of rotation of the motor The comparator produces a

  high level signal "H" when the engine speed is not greater than the reference value, for example

example 3000 rpm.

  Reference 79 designates a vehicle speed sensor that provides a speed pulse signal

  * the vehicle having a pulse frequency corresponding to

  weight at the speed of the vehicle that is detected The vehicle speed pulse signal from the vehicle sensor

  the speed of the vehicle 79 is applied to a detection circuit

  The vehicle speed detection circuit 80 comprises a shaping circuit 81, a frequency divider 82, a shaping circuit 83, a timer 84 and a comparator 85.

  shaping circuit 81 shapes the pulse signal.

  velocity of the vehicle that is applied to the input The pulse signal of the vehicle, shaped, which

  appears at the output of the shaping circuit 81 is

  The output signal of the frequency divider 82 is applied to the shaping circuit 83 which gives it a constant pulse width. The output signal of the shaping circuit 83 is biased to the frequency divider 82 which divides the frequency by two. is transmitted by the timer

  84 to comparator 85 to be compared to a reference.

  When the vehicle speed is greater than or equal to 3 km / h, for example, the comparator 85 provides a high level output signal or "H". The reference 86 designates a power up recovery circuit.

  source of energy is connected, the restoration circuit

  When power is applied 86 applies a signal of

  tauration on a CL reset terminal of a flip-flop

of type D in the comparator 85.

  Reference 87 designates an opening sensor

  throttle butterfly that detects the value of the

  the accelerator pedal

  throttle opening sensor 87

  is applied to a speed detection circuit of

  the accelerator pedal, 88

  detection of speed of depression of the accelerator pedal

  controller 88 produces a level "H" signal when the

  the throttle valve opening is larger than a predetermined value. For example, when the throttle pedal is pressed

  de-sensing speed of depression of the pedal of ac-

  Celer 88 produces a signal of level "H".

  The output signals of the detection circuit

  the speed of rotation of the motor 74, the detection circuit

  The velocity of the vehicle 80 and accelerator pedal depressor detection circuit 88 is applied to an AND gate 89. The output signal of the AND gate 89 is applied to an input terminal. the

  OR gate 90 The reference 91 designates a switch

  clutch which is closed when the clutch is engaged A terminal of the clutch switch 91 is connected to the clutch.

  mass, and a voltage of 8 V is applied to its other terminal.

  not through a resistance Rl The point of con-

  connection between the resistor RI and the clutch switch

  91 is connected via an inverter 92 to the

  be the input terminal of the OR gate 90 The output signal of

  the OR gate 90 is applied to a timer 93 The timer

  riser 93 produces a level signal "H" during a

  determined from the moment of receipt of a

  level input signal "H" The output signal of the

he

  riser 93 is applied to an electrical drive circuit.

  3-magnet 94 The solenoid driver 94

  applies attack signals a and b to the

  Poles 7 and 8 shown in Figure 1, under the effect of a level input signal "H". We will now describe the operation of the

  second embodiment When the rotational speed

  the motor is greater than or equal to a reference value, for example 3000 rpm, the output signal of the motor rotation speed detection circuit 74 is low or "B" I '. vehicle speed is below a reference speed, for example

  example 3 km / h, the output signal of the detection circuit

  the speed of the vehicle 80 is at "B" level.

  when the speed of variation of the aperture of the

  accelerator speed is less than a predetermined speed

  the output signal of the video detection circuit

  accelerator pedal pressure, 88, is at "B" level When at least one of the output signals of the engine speed sensing circuit, 74, of the vehicle speed sensing circuit , 80, or

  of the detonation speed detection circuit of the

  The accelerator pedal, 88, is at level "B", the output signal of AND gate 89 is also at level "B", so that the output signal of the timer circuit

  93 is at level "B" Thus, the electronics driver circuit

  magnet 94 is not actuated and it does not produce the

  In this situation, the upper and lower oil chambers 42 and 43 of each of the dampers 7 and 8 mutually communicate with each other at the same time.

  the communication hole 54 and through the orifice 59

  weavers 7 and 8 thus produce a weak damping action

  movement of the motor 3 back and forth, to

  fishing for the transmission of vibrations to chassis 1 of the vehicle

cule.

  When the rotational speed of the motor is less than a reference value, for example 3000 rpm, the output signal of the engine rotational speed detection circuit, 74, is at the "H" level. vehicle speed is greater or

  equal to a reference value, for example 3 km / h, the

  output signal of the vehicle speed detection circuit

  cule, 80, is at the "H" level. Furthermore, when the speed of variation of the throttle valve opening is

  greater than a predetermined speed, the output signal

* Accelerator pedal depressing speed detection circuit, 88, is at "H" level When the output signals of the speed sensing circuit

  of rotation of the motor, 74, of the speed detection circuit

  of the vehicle, 80 and accelerator pedal depressor detection circuit 88, are all at "H", the AND gate 89 produces an output signal at "H" level. The timer circuit 93 product as well

  an output signal of level "H" for a predetermined duration

  During this period, the electrical attack circuit

  3-magnet 94 is maintained in the active state and produces

  the attack signals a and b.

  that a and b, the rotary valve 50 of each of the dampers

  7 and 8 runs from 900. The communication between

  The upper and lower oil bores 42 and 43 through the communication hole 54 are thus interrupted, so that the two chambers can communicate with each other only by the single orifice 59. The dampers 7 and 8 thus produce a greater damping force. high, ie a stronger damping action of the going movement and

  engine 3, for the predetermined duration

  In other words, when the speed of rotation

  motor is below the reference value, that is (3000 rpm) and when the vehicle speed is greater than or equal to the reference value (ie 3 km / h), and when the opening speed of the butterfly

  accelerator exceeds a predetermined value, the

  Weavers 7 and 8 effectively prevent the motor 3 from being forced to roll relative to the chassis 1 of the vehicle, as a result of the torque reaction of the motor. When the clutch of the automobile is not engaged, the clutch switch 91 is open In this case, a voltage VI, that is to say a level signal "H", is applied to the clutch. inverter 92, so that a signal

  level "B" is applied to the timer circuit 93.

  The output signal of the timer circuit 93 which is applied to the solenoid driver 94 is at the "B" level. The solenoid driver 94 is therefore not operated and does not produce the solenoids. attack signals

  a and b In this situation, that is when the employer

  clutch is not engaged, the upper and lower oil chambers 42 and 43 communicate with each other through both the communication hole 54 and the orifice 59.

  shock absorbers thus produce a low damping

  the movement of the motor 3 and prevent the transmission

  vibration mission of the engine 3 to the chassis 1 of the vehicle

vehicle.

  When the clutch is engaged, after a change

  gear, the clutch switch 91 is closed, so that a signal at the ground level (i.e.

  the level "B") is applied to the inverter 92, which causes

  the application of a level "H" signal to the temperature circuit

  The timer circuit 93 thus produces a level signal "H" for a predetermined duration, during which the solenoid driver 94

  is kept in the active state and produces the

  that a and b Communication between oil chambers

  the lower and lower 42 and 43 through the communication hole 54 is thus interrupted, so that the two chambers communicate with each other by the single orifice 59

  shock absorbers thus produce a greater cushioning

  ture, ie a stronger damping

  on the movement back and forth of the engine 3,

  In other words, following the clutch after shifting, the shocks are actuated to oppose the forced roll of the engine 3 relative to the chassis 1 of the vehicle,

  under the effect of the reaction to the engine torque.

  As has been shown, the second mode of

  tion serves to prevent the roll of the engine 3 relative to the chassis 1 of the vehicle for a predetermined duration, when a situation appears

  in which the rotational speed of the engine is less than

  than a reference value (ie 3000 rpm), when the vehicle speed is greater than or equal to a reference value (ie 3 km / h) and when the speed of variation of the accelerator pedal has a predetermined value as a result of the clutch.

  A third embodiment of the device will now be described with reference to FIG.

  of roll reduction according to the invention.

  In this figure, the reference 7-1 designates an ignition coil, the reference 72 denotes a breaker and

  73 denotes a spark plug Under the ef-

  When opening and closing the switch 72, a high voltage is applied to the spark plug 73

  to produce sparks in the engine cylinder.

  In this embodiment, the speed of rotation is

  the engine from a signal that is produced in accordance

  In particular, a signal appearing at the point of connection between the ignition coil 71 and the switch 72 is applied to a motor rotation speed detection circuit. motor rotation speed detection device 74 produces a voltage proportional to the speed of rotation of the motor.

  form 75, a pulse width determining circuit

  The shaping circuit 75 shapes the input voltage pulses to give a pulse frequency equal to the rotational speed of the motor, and the shaping comprises the

  Noise suppression The circuit for determining the

  impulse 76 gives a constant width to impulse

  the output signal of the shaping circuit 75.

  The voltage provided by the motor rotation speed detection circuit, 74, proportional to the speed of rotation

  rotation of the motor, is applied to a detection circuit

  The motor speed detection circuit, 100, produces a level signal "H" when the variation of the speed of rotation of the motor

  rotation of the motor exceeds a predetermined value

  output from this circuit is applied to a time circuit

  The timer circuit 93 produces a

  level of "H" for a predetermined period of time

  shot from the moment it receives a signal level "H".

  Its output signal is applied to an electromagnet drive circuit 94 The electromagnet drive circuit

  94 can apply attack signals a and b to dampen

  respective ones 7 and 8, shown in FIG.

  that it is placed in the active state by the input signal of ni-

calf "H".

  We will now describe the operation of the

  third embodiment having the above structure.

  As indicated previously, the speed detection circuit

  motor rotation, 74, produces a proportional voltage

  the speed of rotation of the motor.

  produced by the rotational speed detection circuit

  of the motor, 74, proportional to the rotational speed of the motor, is applied to the motor rotation speed detection circuit, 100, which detects a change in the rotational speed of the motor.

  the rotational speed of the motor is less than

  their predetermined, the output signal of the circuit de-

  rotation speed sensor, 100, is at a level "B" The output signal of the timer circuit

  93 is therefore also at the "-B" level. The driver circuit.

  solenoid 94 is therefore not actuated and it does not

  not drive signals a and b.

  In this situation, the oil chambers

  upper and lower 42 and 43 of each of the

  7 and 8 communicate with each other at the same time

  communication hole 54 and orifice 59

  Therefore, they produce a weak damping action of the movement of the motor 3, to prevent the transmission of

  vibration of the engine 3 to the chassis 1 of the vehicle.

  When the variation of the rotational speed of the motor exceeds a predetermined value, the rotational speed detection circuit of the motor, 100, produces

  a signal level "IHIL The timer circuit 93 pro-

  thus gives a level "H" output signal during a

  predetermined duration During this period, the circuit of

  electromagnet drive 94 is maintained in the active state and produces the driving signals a and b.

  drive signals a and b, the rotary valve 50 of dampers

  7 and 8 turns of 900, which interrupts the communication

  cation between the upper and lower oil chambers 42 and 43 through the communication hole 54, so that the two chambers communicate with each other by the single orifice 59 The dampers thus produce a greater damping force, c 'that is to say a stronger damping action, the going movement and

  engine 3, for a predetermined period of time

  In other words, when the change in the rotational speed of the motor exceeds a predetermined value, the dampers

2542 & 34

  are put into action and fight the forced roll of the mc-

  to the chassis 1 of the vehicle, under the effect

  reaction to engine torque.

  In accordance with the foregoing description, the

  third embodiment prevents the roll of the engine 3 relative to the chassis 1 of the vehicle for a period of time

  predetermined, when the variation of the speed of rotation

  the motor exceeds a predetermined value.

  A fourth embodiment of the roll reduction device according to the invention will now be described with reference to FIG. 9. In this figure, the reference 87 denotes an opening sensor of

  throttle butterfly which detects the value of the

  throttle pedal The throttle sensor

  throttle valve 87 has a slider A which moves in accordance with the value of the thrust

  the accelerator pedal When you press the pedal

  accelerator, the cursor A moves in the di-

  arrow B The tension that appears on the

  cursor A is applied to a video detector circuit.

  speed of opening / closing of the throttle valve, 88.

  The opening / closing speed detection circuit

  throttle valve, 88, produces a signal of

  calf "H" when the opening speed of the throttle valve

  celery is for example greater than or equal to 0.5 m / s,

  or when the closing speed of the throttle butterfly

  for example, is greater than or equal to 0.8 m / s.

  produced on slider A is applied to a positive input terminal of a differential amplifier 102, by

  through an integrator consisting of a resistor

  this RI and in a capacitor Cl A resistance R 2 is con-

  between the output terminal of the amplifier

  102 and the mass The references Dl and D 2 denote

  diodes The voltage that is produced at the terminals of the

  sistance R 2 is applied to a negative input terminal of the differential amplifier 102 The output terminal of

  the differential amplifier 102 is connected by a

  densifier C 2 and a resistor R 3 at a point B which connects

  R 5 and R 6 resistors in a voltage divider consisting of a series of resistors R 4 to R 7 The point C connecting the capacitor C 2 and the resistor R 3 is

  connected to a positive signal terminal of a first

  parator 103, which compares the speed of opening of the

  pillon, and it is also connected to an input terminal

  negative of a second comparator 104 which compares the

  The point D connecting the throttle

  sistances R 6 and R 7 is connected to a negative input terminal

  of the first comparator 103 and the point E connecting the resistors R 4 and R 5 is connected to a positive input terminal of the second comparator 104. The output terminals

  first and second comparators 103 and 104 are connected

  at the base of a transistor Ql whose transmitter is

connected to the ground.

  The collector output signal of the transistor

  If the timer circuit 105 receives a level signal "HI", it produces a level signal "H" for a duration T1. The output signal of the timer circuit 105 is

  applied by an OR gate 106 to an electrical drive circuit.

  3-magnet 107 which is constituted by transistors of

  power Q 2 and Q 3 The collector of transistor Q 3 is

  connected to the electromagnet 55, shown in FIG. 3, which produces a strong damping action for each

shock absorbers 7 and 8.

  The output signal of the timer circuit 105

  is applied to another timer circuit 108

  cooked timer 108 produces a signal of level "H"

  for a predetermined duration T 2 under the effect of a signal

  level input signal "H" The output signal of the temporary circuit

  porator 108 is applied to an input terminal of a port

  ET 109 which receives on the other input terminal a pulse signal from an oscillator (not shown). The pulse width of the pulse signal of the oscillator is adjusted in such a way that to be much less than the pulse width of the signal

  output of the timing circuits 105 and 108

  output signal from the AND gate 109 is applied to the gate

OR 106 -

  We will now describe the operation of the fourth embodiment, having the indicated structure

  above When the accelerator pedal is depressed quickly

  throttle, throttle sensor A slider

  accelerator 87 is moved in the direction of the

  che B The voltage applied to the input-positive terminal

  of the differential amplifier 102 is therefore increased

  the value of depression of the accelerator pedal.

  The voltage of the indicated polarity thus appears at the terminals of the capacitor C 2, in accordance with the speed of depression of the accelerator pedal If the values of the resistors R 4 to R 7 are adjusted so that the first comparator 103 produces a level signal

  "L" when the speed of depression of the accelerator pedal

  for example, the output of the first comparator 103 goes to "L" level when the accelerator pedal depressing speed exceeds 0.5 m / s. This results in the output signal being exceeded. the butterfly opening / closing speed detection circuit

  accelerator, 88, goes to "H" level.

  The riser 105 thus produces a level "H" output signal for a predetermined time T1, during which the solenoid driving circuit 107 is kept in the active state. In the active state, the electromagnet 55 is energized to rotate the rotary valve 50 by 900. The communication between the upper and lower oil chambers 42 and 43 through the communication hole 54 is thus blocked, so that the two chambers communicate with each other by the single orifice 59 The dampers 7 and 8 thus produce a large damping force, that is to say a greater damping action of the movement of va and

  engine 3, for the predetermined duration

born above.

  Under the effect of the change to the level "H" of the output level of the timer circuit 105, the timer 108 is triggered in synchronism and produces a level signal "H" for a duration T 2, during which the signal in the form of pulses from the oscillator are transmitted through the AND gate 109 and the OR gate 106 to the electromagnet driving circuit 107.

  duration T 2 is set to be longer than the

  Tl, the timer circuit 108 continues to produce

  a level signal "H" after the duration Tl has elapsed.

  This has the effect of switching on and off

  the electromagnet driving circuit 107 to eliminate

  in this way, shocks to which the elec-

  3-magnet at the time of recovery of the amor-

  This can prevent the generation of

noise at this moment.

  When the accelerator pedal returns quickly

  backwards, the cursor A of the aperture sensor of

  throttle pacer 87 is moved in the oppo-

  arrow B The voltage applied to the terminal

  no positive input of the differential amplifier 102 is reduced in accordance with the value of the pedal return

  The output voltage of the amplifier differs from

  Therefore, ferential 102 is reduced. A voltage of polarity op-

  posed appears therefore at the terminals of capacitor C 2, in accordance with

  the speed of return of the accelerator pedal

  voltage that is applied to the negative input terminal of the

  compar comparator 104 is thus increased in accordance with

  speed of return of the accelerator pedal If the

  their resistors R 4 to R 7 are adjusted so that the second comparator 104 produces a level signal

  "L" when the speed of return of the accelerator pedal

  for example, exceeds 0.8 m / s, the second comparator

  104 produces a level "L" signal when this condition

  The result is that the circuit of

  The throttle valve opening / closing speed, 88, produces an output signal of level "H", so that the timer circuit 105 produces

  an output signal of level "H" for the prede-

  completed Tl The action that occurs is therefore the same as

  when you depress the accelerator pedal quickly.

  As we have just shown, the fourth model

  of realization makes it possible to obtain the function which

  to prevent a significant rolling motion of the engine 3 relative to the chassis 1 of the vehicle when the speed of the throttle pedal corresponding to the opening of the throttle exceeds A ms, or when the speed of the accelerator pedal corresponding to butterfly closure

exceeds B m / s.

  In addition, the difference between engine torque response when depressing the accelerator pedal and when

  quickly release the accelerator pedal, fixing A <B.

  The reaction is greater when you depress the accelerator pedal quickly, for the same variation in throttle opening. Setting the condition

  A c B makes it possible to carry out faster

  damping effect when quickly depressing the accelerator pedal. A fifth embodiment of the roll reduction device according to the invention will now be described with reference to FIGS. 10 to 12. FIG. 10 is a block diagram of this embodiment of the roll reduction device. FIG.

  the detailed structure of the circuits of the subassemblies -

  The individual figures shown in FIG.

  res, the reference 111 designates a potentiometer for detecting the opening of the throttle valve, that is to say

  say the angle of depression of the accelerator pedal.

  The potentiometer 111 produces a pro-detection signal

  portionnal at the opening of the butterfly The signal of de-

  is applied to a speed detection circuit.

  opening / closing position of the throttle valve, 112 Throttle opening / closing speed detection circuit,

  112, detects the opening / closing speed of the butterfly

  lon and produces an "H" level signal when the

  Throttle opening time or throttle closing speed exceeds a predetermined value The detection signal proportional to the throttle opening speed produced by the potentiometer 111 is also

  applied to an opening detection circuit of the papillary

  The throttle opening detection circuit 113 determines whether the opening of the throttle valve is less than

  a predetermined value, and it produces a signal of

  calf "BI" when this condition is satisfied.

  14 denotes a speed sensor of the rotation of

  which detects the rotational speed of the engine and

  produces a signal of rotation speed of the engine.

  the engine rotational speed is applied to a cir-

  Engine Rotational Speed Detection Cooking, 115 Engine Rotational Speed Detection Circuit 115 Determines Whether Motor Rotation Speed Is Lower

  to a predetermined value, and it produces a signal of

  When the condition is satisfied, the output signals of the throttle opening detection circuit 113 and the engine speed detection circuit 115 are applied to an OR gate.

  117 designates a speed change detection circuit.

  its, which receives gearshift signals A

  and B from an electronic automatic transmission

  that (not shown), and it determines the existence of a gearshift based on signals A and B. Specifically, the gearshift detection circuit 117 determines whether a gear shift from the first speed to the fourth was performed This circuit produces an "H" level signal when shifting is performed The signals from the OR gate 116 and the shift detection circuit 117 are applied

  to an AND gate 118 The reference 119 R designates a

  position switch "R" (reverse), which is closed when a selection lever (not shown) is placed

  on "R" The reference 119 D designates a switch of

  sition = "D" (on) which is closed when the selector lever is set to "On" The output signals of position switches "R" and "D" 1 19 R and 119 D are applied to a circuit of inhibition and detection of closing / opening of switches, 119 The circuit dl

  inhibition and detection of closure / opening of in-

  Actuators 119 produces a signal level "H" whenever the position switch "}" or "D" 119 R or

  119 D is closed or open

  external control switch which is closed when

  tests the dampers A signal produced by the interrup-

  120 when it is closed is applied

* to an input interface circuit 121 which produces -s-

  According to the state of the switch 120, more precisely, when the control switch is closed, the input interface circuit 121 produces a level signal "H". throttle opening / closing speed detection,

  112, the AND gate 118, the inhibition and deceleration circuit

  switch closing / opening circuit, 119, and the input interface circuit 121 are applied to a

  OR gate 110, whose output signal is itself

  the timing circuit 93 The temporal circuit

  93 has the function of operating a cir-

  cooked electro-magnet attack 107 for a duration

  predetermined by the effect of an input signal of

  calf "H" * The output signal of the interface circuit

  input 121 is also applied to a driver circuit.

  cutting 122 The cutting circuit 122 exerts its

  action on the trailing edge of the definite impulse

  time from the timer circuit 93.

  When the output signal of the interface circuit of

  When the tread 121 passes to an "H" level, the chopper control switch 122 stops. The solenoid driver 107 output terminal is connected to a terminal of the solenoid 55 to drive the rotary valve. 50 in the dampers 7 and 8 The other terminal of the electromagnet 55 is connected to the positive terminal of a battery 123 whose negative terminal is connected to ground. The output signal of the driver circuit

  electromagnet 107 is applied to a detection circuit

  When the temperature of the electromagnet 55 is high due to the production

  of heat, the high temperature sensing circuit

  124 detects a reduction in the current of the electro-

  magnet circulating in the electronic driver circuit

  magnet 107, and produces a level signal "Bi" when

  that the current of the electromagnet becomes lower than a predetermined level When the high temperature detection circuit 124 produces a signal of level "B",

  the timer circuit 93 is forced to the idle state.

  The positive terminal of the battery 123 is

  connected via a key switch 125 to a stable supply circuit 126 and a circuit of

  low voltage detection 127 The output signal of the circuit

  When the voltage of the stable supply circuit 126 becomes lower than a predetermined level, the tripping of the timer circuit 93 is prohibited. Figure 11 is a diagram showing in detail

  the individual subsets of Figure 10.

  We will now describe the operation of the

  fifth embodiment having the structure

  The voltage provided by potentiometer 111 varies

  according to the operation of the accelerator pedal.

  The throttle opening / closing speed detection circuit, 112, determines whether the opening speeds

  and butterfly closure that are detected by the

  tentiometer 112 are greater than the predetermined values.

  When the throttle opening or closing speed exceeds the predetermined value, the throttle opening / closing speed detection circuit 112 produces a level signal "H". As a result, the timing circuit 93 is placed in the active state of

  to operate the electronic driver circuit

  magnet 107 for a predetermined time, during which the electromagnet 55 is excited The dampers 7 and 8 are thus put into operation to exercise a plus

  strong damping action on the roll of the motor.

  As we have shown, when the speed of

  Thread or closure of the throttle exceeds a predetermined value, the dampers exert a stronger

  damping action on the roll of the engine.

  We will now describe the operation of

  which takes place when the automatic transmission

  tronic makes a gearshift The gearshift signals A and B produced by the gearbox

  automatic control are applied to the circuit of de-

  shifting sensing 117 The detection circuit

  shift control 117 controls the signals

  shifting gears A and B to detect a change in

  Gear shifting from first gear to fourth gear When gear shifting from first gear to fourth takes place, gearshift detecting circuit 117 generates a signal

level "H".

  When the opening detection circuit of the

  butterfly 113 detects that the opening of the butterfly is

  greater than a predetermined value, or when the cir-

  baked rotational speed detection motor 115

  detects that the rotational speed of the motor is higher than

  At a predetermined value, the throttle opening detecting circuit 113 or the engine rotational speed detecting circuit 115 produces a level signal "H". As a result, the electronic automatic transmission performs a gear shift. more,

  when the throttle opening exceeds a predetermined value

  completed or when the rotational speed of the engine de-

  When a predetermined value is passed, the AND gate 118 applies a level signal "H" to the timer circuit 93. As a result, the solenoid driver 107 is turned on for a predetermined period of time, during which time the The solenoid 55 is energized Under the effect of the driving signals a and b, the rotary valve of each of the dampers 7 and 8 rotates 900 to interrupt the communication between the oil chambers.

  upper and lower 42 and 43 through the communication hole

  54, which means that the two chambers communicate

  mutually by the single hole 59 The shock absorbers pro-

  thus create a greater damping force, that is,

  ie a stronger damping action, movement

  back and forth from motor 3 for a predetermined period of time

  Thus, a forced roll of the motor 3 is prevented by

  to chassis 1 of the vehicle, as a result of the reaction

to the engine torque.

  When opening the throttle and speed

  engine rotation are less than a pre-

  In this case, even if the electronic automatic transmission performs a gear change, the output signal of the AND gate 118 remains at the "B" level. , so that the timer circuit 93 is

  In other words, even if the trans-

  electronic automatic mission makes a change

  the damping function is not communi-

  higher amortization on such long-term

  time than the speed of rotation of the motor and the opening

  butterfly are lower than a predetermined value.

  In addition, whenever the power switch

  "R" or "D" 119 R or 119 D is closed or open, the

  circuit of inhibition and detection of closing / opening

  The solenoid driver 107 is thus turned on for a predetermined period of time, during which a level signal "H" is applied to the timer circuit 93.

  the electromagnet 55 is excited to produce a stronger

  damping action on the motor 3, in order to prevent

  expensive that it does a roll motion relative to

to chassis 1 of the vehicle.

  When the dampers 7 and 8 are tested,

  closes the external control switch 120. As a result, the output signal of the input interface circuit

  121 goes to an "H" level, which is applied to the temporary circuit

  The electromagnet drive circuit 107 is thus turned on for a predetermined time, during which the electromagnet 55 is energized to cause the dampers 7 and 8 to produce a stronger action. damping on the engine When

  the external control switch 120 is closed, the circuit

  bake 122 is grounded through the

  of the input interface circuit 121 and the inter-

  external control switch 120, as Fig. 11 clearly shows. Therefore, the chopper circuit 122 no longer exerts the chopper control unless

  he also exerts himself on the falling front of the

  timer pulse from the timer circuit

  93 Thus, on the descent of the temporal impulse

  timer circuit 93, the output signal

  the electromagnet drive circuit 107 terminates.

  This produces a shock sound because of the shock that occurs

  in the shock absorbers because of the elastic forces

  recall in these dampers The return of damping

  to their inactive position can therefore be confirmed

  The test will be described later in detail the function

  switching circuit 122.

  When the dampers 7 and 8 are actuated frequently, the electromagnet 55 heats up, resulting in its deterioration or the emission of smoke from this body is prevented by detecting the current in the electromagnet 55 More precisely, we

  perform the detection using the fact that

  passing through the electromagnet 55 decreases when its

  temperature increases The current flowing through the electro-

  magnet 55 is applied to the temperature detection circuit.

  high level 124 through the circuit of attack

  Electro-magnet 107 The time detection circuit

  high temperature 124 can thus detect a decrease in

  current in the electromagnet 55 When the current flows

  pouring the electromagnet becomes less than a level

  predetermined, this circuit forcibly stops the temporary circuit.

  93, which forcibly stops the operation of the electromagnet driving circuit 107. It is thus possible to prevent the deterioration of the electromagnet 55 or the emission of smoke by this organ under the effect of of

his warm up.

  The operation of the switching circuit 122 will now be described with reference to FIGS.

  12 A and 12 B The switching circuit 122 applies a

  sawtooth output, shown in a on the

  12 A, to a positive input terminal of a comparator

  93-1 in the timer circuit 93 which is

  shown in Figure 11 When the temporal circuit

  93 is stopped, the voltage applied to a negative input terminal of comparator 93-1 is reduced

  as shown by a curve b

  intermittent A during which the voltage in

  sawtooth a is lower than the voltage b on the

  Negative input during periods A, the comparison

  93-1 produces a level "B" output signal.

  electromagnet driving circuit 107 is therefore attacked intermittently, during the durations A, as shown

  Figure 12 B It should be noted that with the existence of

  slicing oven 122, the electronic driver circuit

  magnet 107 is actuated intermittently for one

  determined by the end of the temporary circuit

  It is thus possible to prevent the genera-

  the sound of shock resulting from the shock that is produced

  in the dampers 7 and 8 by the internal elastic force.

  It goes without saying that many modifications can be made to the device and method described

  and represented without departing from the scope of the invention.

Claims (10)

  Roll reduction device for an engine, characterized in that it comprises: an enclosure (46, 47) containing a liquid; a separator element (41) attached to the engine or chassis of the vehicle and dividing the interior of the enclosure into two parts; mounting means (44, 45) for fixing the walls of the two parts, facing the separator element, the motor   vehicle chassis, depending on whether the separating element   driver is respectively attached to the chassis of the vehicle or the engine; an orifice structure (48, 50, 59) formed   in the separator element to control the communica-   between the two parties; an accelerator throttle opening / closing speed detecting means (88) for determining whether the speed of variation of the throttle pedal angle is greater than a predetermined value; and control means (93, 94)   intended to ensure that the orifice structure   the communication between the two parties during   predetermined duration, under the effect of a signal   opening speed detection means /   closing the throttle butterfly.   Roll reduction device according to the   claim 1, characterized in that the structure of origin   fice comprises: a valve mechanism (48, 50) for controlling all or nothing communication between the two parts; and an orifice (59) which communicates the two parts between them.   3 Roll reduction device according to the   Claim 2, characterized in that the valence mechanism   ve (48, 50) comprises: a bore (48) formed in the separator element; a rotary valve (50) housed in this bore;   drive means (55) for controlling the   rotation of the rotary valve; and a stopper   che (56) facing a pointed end of the valve   rotating and closing an open end of the bore.   4 Roll reduction device according to the   claim 1, characterized in that the outer surfaces   the walls of both parts   elastic tubers (64) capable of coming into contact   with the engine or chassis of the vehicle, where such   Kings are moved beyond a predetermined distance.   Roll reduction device according to the   claim 1, characterized in that it comprises in   : means for detecting rotation speed of the   motor (74) for determining whether the rotational speed   the motor is below a predetermined value;   and control means (93, 94) for operating   the orifice structure for a constant duration when the accelerator throttle opening / closing speed detecting means (88) and the means   engine rotational speed sensing device (74) feel signals.   Roll reduction device according to claim 5, characterized in that it further comprises   vehicle speed sensing means (80) for   determined to determine if the speed of the vehicle is greater than a predetermined value; and control means (93, 94) for operating the orifice structure for a constant duration when the accelerator throttle opening / closing speed detecting means   (88), the rotational speed detecting means of the   (74) and the vehicle speed sensing means (80) produce signals.   7 Roll reduction device according to one   any of claims 5 or 6, characterized in that   it further comprises speed detection means   opening / closing of the throttle butterfly (88)   to determine whether the speed of variation of the   throttle throttle is greater than a predetermined value. 8 Roll reduction device according to   any of claims 6 or 7, characterized   in that it further comprises motor rotational speed detecting means (100) for determining whether the rotational speed of the motor is greater than one predetermined value.   9 Roll reduction device according to   claim 6, characterized in that it comprises in   being clutch state detecting means (91) for detecting the condition of the clutch; and control means for operating the port structure (48, 50, 59) for a predetermined time when the rotational speed detecting means   the motor (74) and the speed sensing means of   opening / closing of the throttle valve (88)   signals, or when the detection means   state of the clutch (91) produce a signal.   Roll reduction device according to the   claim 1, characterized in that it comprises in   be means of detection of opening / closing speed   accelerator throttle (88) for detecting   the speed of variation of the angle of the pedal of   célérateur; and control means (105, 107) for   to operate the orifice structure to   to reduce the communication between the two parts for a predetermined duration, when the speed of variation of the angle of the accelerator pedal in the direction   driving force provided by the means for detecting   speed of opening / closing of the throttle butterfly.   (88), is greater than A m / s, and when the speed of variation of the angle of the accelerator pedal in the   return direction is greater than B m / s.   Roll reduction device according to the   Claim 3, characterized in that the drive means   electromagnet 55) and that the device further comprises: a timer circuit   (93) for actuating the electromagnet (55) for resetting   the communication between the two parts for a predetermined period of time under the effect of a signal   opening / closing speed detection means   throttle butterfly (88); and a circuit of   cutting (122) for performing a control by de-   cutting to gradually reduce the electricity current   magnet after the disappearance of the output signal from the timer circuit (93).   Roll reduction device according to the   claim 11, characterized in that it comprises in   being means for selecting a diagnostic mode (120) for producing a pseudo-operation of the control means; and means for turning off   the switching circuit (122) when the switching means   request the pseudo-operation of the means of selection diagnosis mode (120).   13 Roll reduction device according to   claim 11, characterized in that it comprises in   temperature sensing means (124) for   detecting the temperature of the electromagnet; and some   yens intended to prevent the operation of the temporary circuit   porator when the temperature that the means detect   of temperature detection (124) exceeds a pre-determined value determined.