JPS5932650A - Engine speed controlling apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a t:1 Borngin rotational speed control device.

Conventional υ automatic, IF engine has improved fuel ratio or 1-
In order to reduce the amount of gas used, there is a tendency to lower the idling speed. However, considering variations in engine V performance and changes over time, there is a limit to how much the idling speed can be reduced. An electronic control device that can accurately and stably control the engine has come to be used as an iJr I-2 technical means. An example of the 4ξ position is shown in Figure 1-3:
do. Figure 1 shows the direct b1 shimotor 1, the stopper position of the throttle valve being changed, and the engine/shin engine idling rotation 8. FIG. 2 is a block diagram showing an example of a conventional device that performs such control. In the figure, (c) ignition coil, 2 controls the ignition coil 1, and the ignition coil control 1-'=I+
−'f, 3 is connected to ignition coil 1, l between ignition signals
L'4' lit] period measurement circuit that measures the interval 4, 4 is the time interval between ignition signals, the weight of the actual engine rotation speed N is 4
Teratsu [rotation speed calculation circuit that converts to rotation speed times - number, set to 5 and target idling rotation speed N. At the target rotational speed calculation time IFδ, the target rotational speed offshore fishing circuit 5 is connected to a load switch 51 for detecting the engine load such as an air conditioner, and a temperature switch 51 for detecting the engine removal water temperature.
2, the target idling rotation speed NO is determined based on these detection signals. Reference numeral 6 compares the IB saw signals of the rotor 9 control 3 key circuit 4 and the target rotation speed calculation circuit 5, and generates a comparison signal indicating the magnitude between these two output signals. and a deviation detection circuit that outputs the rotation speed deviation A word indicating the deviation, 7 is the deviation detection circuit 11 LEff
Receives 49 ports of two types of output signals, including 6 ports and 1 channel, direct +
11t to calculate the optimum driving time data of the motor 121
Ill? a(l) The pulse width calculation circuit is the DC motor 1.
21 I) 11 missing. Is the period of 1η movement on the same side (7, a control period counter that outputs 113 BUJ-1 at every fixed period T, 9 is a Nomanotos 1 counter,)? The pulse width counter 9 has an internal F01 set value J counter, and a control period counter 875 (11 points) which presets the output value of the control pulse width calculation circuit 7 at the time when the N number is output, and at the same time It starts decrementing g, and continues to perform this decrement and counting operation until the content of the preset counter becomes zero, and continues to send out the output signal.10 is a control signal generation circuit, and deviation detection circuit 6 is also used. In response to the output signals of the comparison signal A and /?/l/s width counter 9, a forward rotation signal or a reverse rotation signal for driving the DC motor 121 in forward rotation or reverse rotation is outputted. Upon receiving the output signals from the terminals 101 and 102, the DC motor 121 is driven in forward rotation or reverse rotation.Drive jii!1
Times 113.12 r! Throttle valve accuille:
1-- actuator 12 & DC motor 12
1. When the deceleration mechanism 122 converts the rotational motion of the DC motor 121 into a straight helix motion, the accelerator -ξdal-1 is turned on.
switch 123 for detecting the fully closed state of 4, deceleration mechanism 12
The throttle stopper 124 is linearly driven by the throttle stopper 124 and the cam mechanism 125 is locked by the throttle stopper 124.

The cam machine m 125 is interlocked with the throttle valve 1.3.

Next, the operation of the above conventional device will be explained. Figure 2 shows the target idling speed N. FIG. 3 shows the relationship between the rotational speed deviation between the actual engine rotational speed N and the driving time data of the DC motor 121. FIG. This is an evening/imm chart showing a reversal signal. First, the time interval between the ignition signals measured by the period measuring circuit 3 is converted into an actual rotation speed signal having a subtance of the rotation speed in the rotation speed calculation circuit 4, and is input to the deviation detection circuit 6. The target rotational speed calculation circuit 5 calculates a target idling rotational speed No. according to information from the load switch 51 and the temperature sensor 52, and inputs this value to the deviation detection circuit 6 as an output signal.

As a result, the deviation detection circuit 6 outputs the difference between the actual engine rotation speed N and the target buoy ring rotation speed 1 to 0 as a rotation speed deviation signal port to the control/rust width calculation circuit 7.
and N. A comparison signal A indicating the magnitude relationship between the two is output to the control pulse width calculation circuit 7 and the control pulse width signal generation circuit 10. Here, if the comparison is i: rLJ level, then N. >N is shown, and when the level is f-11J, No<N is shown. , control 1jll] e Lus width performance f) circuit 7 te
l: Calculate the optimum drive time data D i''J' of the DC motor 121 according to the comparison signal A and the rotational speed deviation signal port, and output this to the corner counter 9. Seventh
．． Is it 1? The horizontal axis is 145 rotation speed deviation N. -N
, the vertical axis shows drive time data I) TP1-1 and forward rotation, reverse rotation t'--forward rotation drive 11su of the DC motor 121, respectively.
The opening 7Ii11 operation and closing operation of the A and B 13 shown in FIG. l No N l lt (If it is within the range of no & band rotation speed Nd, data between drive 1 and IJ n4r 11 'I'I' t, l: zero υ, DC motor l 21. i -1, jsis 1 (1, pal, 2.1llll counter 9 is Illpe1ll)
II Exist [Using Button I] i'P7? Conversion to Lusu medium nail 1~. 11
l' P ) is output to the tl control A number generation circuit 10 as 1-6, ? The period T in which the pulse width counter 9 generates the driving pulse width signal j(']'P) is determined by the control period)) rank 8 by Ij.

Here, the switchboard 123 provided in the actuator 12
is in the main state, that is, when the accelerator pedal 14 is fully pressed [Y1 state], the control signal generating circuit 10 and its output terminal 10
A signal is output from 71.102. In this case, the control signal generation circuit 10 uses the drive pulse width signal T based on the comparison signal A.
P is led to the output terminal 101 or the output terminal 102. That is,
When the comparison signal I is at L level, No>N, so the driving nozzle width signal TP is guided to the terminal 101 as a normal rotation signal, and when the comparison signal I is at H level, it is N. Since the current is N, the drive/drive width signal TP is sent to the terminal 102 as a reverse signal.
guided by. However, if 1NoNl is within the dead zone rotational speed Nd, the drive pulse width signal TP is zero and is not output to the output terminals 101 and 102. When the drive circuit 111 is open and a signal is output from the output terminal 101, the DC motor 121 is driven in the forward rotation, and therefore the throttle stroke is
124 is pushed out, the throttle valve 13 opens, and the engine speed increases. Also 1. The drive circuit 11 drives the DC motor 12 while a signal is output from the output terminal 102.
1 is reversely driven, and therefore the throttle stroke /'e12
4 is retracted, the throttle pulse f13 is closed, and the engine speed decreases.

Next, until the engine speed becomes stable, 1Til1 operation is performed with acid using Figure 3.
III, since 01■, the engine load has increased, and the engine speed 1IIKX friend N has become 11 idling rotation speed N. The following state is shown. The engine rotation speed at IL'J time t1 is N, te υ, and the voltage between drive + B4 output from the control/P pulse width calculation circuit 7 is 'I'. Pt'' and D T P + as shown in FIG. (T means...?
A・S width count 91d From time t, time width 'L' P
, IJ Mu old! Outputs a pulse width signal TP. Since the engine rotation speed N is less than the target idling rotation speed N, the drive mj+ circuit 11 drives the DC motor 21 during the time width T P + to rotate the throttle valve. 13:y5; open,
1-engine rotation a increases j1, then J-engine rotation 1 at time t, 1574 cycles T after time t1.
・Mi・Number is N. At this time t, t is still N. >N, the 1σ flow moke 121 is rotated normally for a time width Tpt from 7/l−. As a result, the engine speed increases by 1 and l N before reaching time t3.
o-・N1 becomes N t3 or more 1・J, and DC motor 1
The drive signal 21 is not output after time t, and thereafter the DC motor 121 is not driven until INoNl exceeds Nd due to some disturbance. In this way,
N for N. Can be controlled and maintained in close proximity.

In the conventional device described above, conditions such as when the engine load is large, such as in a car with a torque converter where the near conditioner or each electric load is on, and the drive range is selected, occur at the same time. In this case, ljii IJJ, IiJ of the throttle valve 13 when the engine speed 1 inch is controlled near the target idling speed No. is considerably larger than when there is no engine load. In this state, stop the engine, turn off or remove the valley AI-+n engine load as described above, and then turn the engine to Ilh 61fl. Since the throttle valve 13 is wide open, the engine will start immediately after the engine starts. There was a drawback when the rotation speed rose to high rotation.

The present invention has been made taking into account the points mentioned above.It detects the reference position of the actuator. l! An 8 single-position switch is provided, and when the power is turned on, etc., the actuator is driven to the reference position 11 engine, and then engine/sin rotation speed control is performed to control the engine speed immediately after startup.
．． The purpose of the present invention is to provide a 4-way engine speed control system that can prevent this.

Figure 4 shows the device of the present invention, but only the parts that are different from the conventional device shown in Figure 2g1 are shown, and the parts are outdated. 1-9, 1
1 to 14 are not shown. This is a 16-bit control signal generation circuit, and is partially different from the flf1/jll signal/signal generation circuit 10 shown in FIG. 1, but the corresponding functions are unchanged.

1 6 1 * 1. 6 2 is husband h m 1. l'
J? J output terminal 1. Output terminals corresponding to 0 1 and 1 0 2, 163.

164, 1671.
165, 1 6 (i ζ・:jA
N1) circuit, 168 is a switching circuit. , 15 is an initialization signal generation circuit, 151 is a change detection circuit, 152
+: J, power-on detection circuit, 153id Noritsu no log circuit, 1 2 6 tel, reference included in the deceleration mechanism 122 (i7 position switch shown,) D'
The position switches 1, 2, and 6 are set to 1 when the accelerator pedal 14 is not depressed and the engine is under no load.
It is set to change near the angle of the throttle/lube 13 at which the standard idling rotational speed is obtained.

Next, the operation of the above device N,t will be explained. control fill
Signal generation [i;
-From counter 9 to TF31/Sorus width signal-”; T
When P is input, a comparison signal is sent from the deviation detection circuit 6.
3. First, when the power of the engine speed control device shown in FIG. 4 is turned on, the power-on detection circuit 152 outputs the output signal Generates (7, Fligf 11 Tube circuit 15
30 is set, an H level signal is output from the output ψ114 child Q, and the input terminal S of this output U-switching circuit 168
is input to. The switching circuit 168 (depending on the input signal level of the input terminal S, selects either the signal applied to the input terminals A+ and A2 or the signal applied to the input terminals Bl and 112, and outputs it to the output terminals Or and Ot. .As mentioned above, when the power is turned on, the refrig frog circuit 15
When a signal from 3 to H level is input to the input terminal S, the signal applied to the input terminal B1 rB becomes the output terminal 0+ -
Derived to Ox. Here, if the reference position switch 126 is on, the throttle pulse 7'13 is opened more than the set throttle pulse (1111); , if the reference position switch 126 is off after the power is turned on, the input is 1,1.
child B+ 4-J, ■(level, input terminal B Tsuji LI7 level, so output 'ylb1 child 1 via output terminal OL
61 has forward rotation drive (iffi number occurs 17, DC motor 1
21U, rotates forward. As a result, the base thread position switch 126 ← 1 onion and garu 0, the reference position switch 126
The change detection circuit 151 outputs a pulse signal at the moment when it turns on/changes.
153 is reset, and the output terminal Q becomes L level.

Therefore, the input terminal S of the switching circuit 168 becomes L level, and the signals of the input terminals A, +, A are selected, and the signals of the output terminals 01, 0, . .

Niueta, it's gone. The design of the input terminals AI-AjI is the same as the conventional one with the output of the AND circuit 165 and 1.66.

That is, if the accelerator pedal 14 is fully open, the switch 123 is turned on, so the output of the NOT [-jl circuit 63 is at the 1■ level, and the comparison signal A is at the 1. Since the output of the NOT circuit 164 is at the T level, the driver υ pulse width signal TP is input to the AND circuit 165, and the input fl
: Tako A, and output terminal 16 via output terminal O1
1 as a normal rotation signal, and if the comparison signal A is at 11), the driving noggle width signal T I) is output to the output terminal via the A N D circuit 166, the input terminal A, and the output terminal 02. A reversal signal and I- are guided to 162, and control is performed in the same manner as in the conventional case. , the reference position switch 126 when the power is turned on.
When is on, the input terminal B, l: I: L and the input p; occurs, and the DC upstream 121 is reversed. As a result, the chair
l is based on j~' (position 126 is turned off, this change is detected by the change detection circuit 151, and the switching circuit 168 is switched. From then on, as in the conventional case, when the switch 123 is on, the engine speed N is set to the target Idling speed N
. It is controlled so that

In this way, the position of the deceleration mode 41-122 when the engine is stopped, which determines the initial position of the deceleration mechanism 122 after the power is turned on, that is, the opening degree of the throttle palnia '13 when the accelerator pedal 14 is not depressed. Since the predetermined value is limited to 1 μ, it is possible to completely prevent the phenomenon of overshooting of the rotational speed after starting the engine, which is a drawback of the conventional technology.

In the above embodiment, the bases it and I of the actuator 12 are
I tried to start the drive to the Although the actuator 12 is configured as a throttle valve, it is possible to control any engine speed.Also, although the actuator 12 is configured as a throttle valve, other means for adjusting the engine speed can be controlled. In addition, the actuator 12 may be operated by a direct current motor 121, including the crane 1 of the present invention. Device eyes, blog circuits and
- By processing equipment such as microcomputer (・t"
Is it possible to make f? ~ru.

As described above, in the present invention, the reference position (?"1. Detection means'!") for detecting the reference position of t:no2, the Akbu-uni-kamiri is described above.
lr, setting, when the operating state changes such as when power is turned on or when decelerating, normal engine speed control is performed after driving the actuator to the reference position. Even when the actuator is moved to the mold position, the engine speed adjustment means such as the throttle valve are also driven to the reference position.
, an abnormal increase or decrease in engine speed l・,
Immediately reduce the engine speed to g without lj-fi
i can be controlled.

[Brief explanation of drawings]

1st pso 1 is a configuration diagram of a conventional device, FIG. 2 is a diagram of the relationship between engine speed deviation and 1-hour data recorded by a DC motor according to the conventional method and the present invention, and FIG. 3 is a control diagram according to the conventional device and the present invention. FIG. 4 is a time chart showing the relationship between the actual rotation speed change and the output change in the engine noise generation circuit, and FIG. , 2... Ignition coil control device, 3
...Period measurement circuit, 4.Rotation speed calculation η-circuit, 5.
...Target rotation speed calculation circuit, 6...Difference detection circuit, 7.
··control)! pulse width arithmetic circuit, 8... control period counter, 9... pulse width counter, 12... actuator, 13... slot)/reparve, 14... accelerator pedal, 15... initialization signal generation Circuit, I6...
・Control 'I11 (!I number generation circuit, 126... Reference position detection switch, 151... Change detection circuit, 152.
...Power-on detection circuit, 168...Switching circuit. In addition, the same reference numerals in the drawings indicate the same or corresponding parts. Agent Kuzu Town IU-O 2 Figure 411

Claims (2)

[Claims] (1) In an engine and engine speed control device that includes an actuator that drives an engine speed adjustment means and controls the actuator according to the rotation speed deviation between the target engine speed and the actual engine and engine speed. , a reference position detecting means for detecting a reference position of the akugoyuator is provided, and after driving the actuator to the reference position, the actuator is controlled according to the rotation speed deviation. Device. (2) The output of the reference position detection means changes before and after the reference position of the actuator, and a change detection means for detecting a change in the output of the detection means is provided at the reference position 1, and the change detection means detects the reference position. 7. An engine speed control system, characterized in that the actuator is driven until a change in the output of the means is detected, and then the actuator is controlled in accordance with the rotational speed deviation.