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GB2356685A - Vehicle braking control systems - Google Patents

Vehicle braking control systems Download PDF

Info

Publication number
GB2356685A
GB2356685A GB9927955A GB9927955A GB2356685A GB 2356685 A GB2356685 A GB 2356685A GB 9927955 A GB9927955 A GB 9927955A GB 9927955 A GB9927955 A GB 9927955A GB 2356685 A GB2356685 A GB 2356685A
Authority
GB
United Kingdom
Prior art keywords
vehicle
vibrations
brakes
control
control unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB9927955A
Other versions
GB2356685B (en
GB9927955D0 (en
Inventor
George Howard Mercer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MG Rover Group Ltd
Jaguar Land Rover Ltd
Original Assignee
MG Rover Group Ltd
Land Rover Group Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MG Rover Group Ltd, Land Rover Group Ltd filed Critical MG Rover Group Ltd
Priority to GB9927955A priority Critical patent/GB2356685B/en
Publication of GB9927955D0 publication Critical patent/GB9927955D0/en
Publication of GB2356685A publication Critical patent/GB2356685A/en
Application granted granted Critical
Publication of GB2356685B publication Critical patent/GB2356685B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
    • B60G17/015—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
    • B60G17/016—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by their responsiveness, when the vehicle is travelling, to specific motion, a specific condition, or driver input
    • B60G17/0165—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by their responsiveness, when the vehicle is travelling, to specific motion, a specific condition, or driver input to an external condition, e.g. rough road surface, side wind
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
    • B60G17/015—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
    • B60G17/0195—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the regulation being combined with other vehicle control systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/17—Using electrical or electronic regulation means to control braking
    • B60T8/173—Eliminating or reducing the effect of unwanted signals, e.g. due to vibrations or electrical noise
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
    • F16F15/022—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using dampers and springs in combination
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F7/00—Vibration-dampers; Shock-absorbers
    • F16F7/10—Vibration-dampers; Shock-absorbers using inertia effect
    • F16F7/1005—Vibration-dampers; Shock-absorbers using inertia effect characterised by active control of the mass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/20—Type of damper
    • B60G2202/25—Dynamic damper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/10—Mounting of suspension elements
    • B60G2204/18—Mounting of vehicle engines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2400/00—Indexing codes relating to detected, measured or calculated conditions or factors
    • B60G2400/10—Acceleration; Deceleration
    • B60G2400/102—Acceleration; Deceleration vertical
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2400/00—Indexing codes relating to detected, measured or calculated conditions or factors
    • B60G2400/20—Speed
    • B60G2400/206—Body oscillation speed; Body vibration frequency
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2400/00—Indexing codes relating to detected, measured or calculated conditions or factors
    • B60G2400/20—Speed
    • B60G2400/208—Speed of wheel rotation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2400/00—Indexing codes relating to detected, measured or calculated conditions or factors
    • B60G2400/25—Stroke; Height; Displacement
    • B60G2400/252—Stroke; Height; Displacement vertical
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2400/00—Indexing codes relating to detected, measured or calculated conditions or factors
    • B60G2400/90—Other conditions or factors
    • B60G2400/91—Frequency
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2800/00—Indexing codes relating to the type of movement or to the condition of the vehicle and to the end result to be achieved by the control action
    • B60G2800/21—Traction, slip, skid or slide control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2800/00—Indexing codes relating to the type of movement or to the condition of the vehicle and to the end result to be achieved by the control action
    • B60G2800/21—Traction, slip, skid or slide control
    • B60G2800/215—Traction, slip, skid or slide control by applying a braking action on each wheel individually
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2800/00—Indexing codes relating to the type of movement or to the condition of the vehicle and to the end result to be achieved by the control action
    • B60G2800/90—System Controller type
    • B60G2800/91—Suspension Control
    • B60G2800/916—Body Vibration Control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2800/00—Indexing codes relating to the type of movement or to the condition of the vehicle and to the end result to be achieved by the control action
    • B60G2800/90—System Controller type
    • B60G2800/92—ABS - Brake Control

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Transportation (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Regulating Braking Force (AREA)

Description

2356685 Vehicle Brakina Control Systems The present invention relates to
control systems for vehicle brakes and in particular to anti-lock and traction control systems.
It can be a problem with both anti-lock braking and traction control systems that the pulsed application of the brakes used in them tends to set up vibrations in the vehicle. These can either be vibrations of the wheels vertically caused by reaction of the pulsed braking torque through the suspension, or vibrations in the drive train. These vibrations can reduce the effectiveness of the brakes by reducing the level of traction between the tyres and the ground, and can also be felt as vibrations by the driver.
The present invention provides a vehicle comprising wheels, brakes for braking the wheels, a brake control unit arranged to control the brakes, controllable actuation means for controlling movement of a component of the vehicle, and sensing means wherein the brake control unit is arranged to detect the occurrence of vibrations in the vehicle using the sensing means, to determine whether the vibrations are being produced by control of the brakes and, of they are, to control operation of the actuation means so as to counteract the vibrations.
Preferably the vehicle further comprises a source of hydraulic pressure used by the brake control unit for control of the brakes, and the actuation means is also hydraulically operated using hydraulic pressure from the source.
The actuation means may form part of an engine mounting system for the vehicle, or part of a suspension system. In either case the brake control unit can co-ordinate the control of the actuation means with that of the brakes so as to produce highly effective damping of the induced vibrations.
Preferred embodiments of the present invention will now be described by way of example only with reference to the accompanying drawings in which:
Figure 1 is a diagrammatic representation of a vehicle according to the invention.
A vehicle has a body 10 with wheels 12, 14 connected to it by respective suspension systems, each comprising a spring 16 and a hydraulic actuator 18. An engine 20 is mounted on the body 10 by means of hydraulically actuated active engine mounts 22. Hydraulically actuated brakes 24 are provided to apply a braking torque to the wheels, and the braking torque can be modified by a hydraulic valve block 26 using hydraulic pressure from a pump 28 under the control of a chassis control unit 30. The chassis control unit 30 therefore performs the functions of conventional ABS control units, but also controls the operation of the suspension actuators 18 and the active engine mounts 22 as described below.
Wheel speed sensors 32, ride height sensors 34 and an accelerometer 36 mounted on the body 10, and a sensor 38 for sensing vibrations of the engine 20 all provide signals to the control unit 30, which determines from them the frequency and amplitude of vibrations of the wheels 12, 14 relative to the body 10, absolute vibrations of the body 10 and vibrations of the engine 20 relative to the body 10, and also the nature of the surface over which the vehicle is travelling.
Under normal driving conditions the control unit 30 controls the suspension actuators 18 and the engine mounts 22 in a conventional manner. For example, if the vehicle is travelling round a corner the actuators 18 are operated to prevent vehicle roll.
The chassis control unit 30 is also arranged to provide an anti-lock brake (ABS) function and a traction control function. During ABS operation the valve block 26 is arranged to reduce the hydraulic pressure to the brakes if locking of any of the wheels 12, 14 is detected. During traction control the valve block is arranged to apply the brakes using pressure from the pump 28 of any of the wheels is spinning. Each of these functions tend to result in a pulsing of the braking torque, and they can therefore lead to vibrations being built up in the wheels 12, 14 or in the engine 20.
Therefore during ABS and traction control the control unit 30 is arranged to monitor for vibrations in the vehicle using the various sensors 32, 34, 36, 38 and to determine whether vibrations are being set up as a result of the brake control. This can be done by detecting that the frequency of the vibrations corresponds to that of the pulsed actuation of the brakes. Typically the vibrations produced are axle tramp where the wheels vibrate relative to the body, and driveline vibrations.
If vibrations of the wheels are detected which are of the same frequency as the brake actuation pulses, then the control unit controls the valve block 26 so that a pulsed hydraulic pressure is supplied to the suspension actuators 18 so as to counteract the vibrations. It can do this because it controls the braking and hence can co-ordinate the control of the actuators with the control of the brakes. This reduces the vibrations which will be felt by the driver and improves the effectiveness of the brakes by making the contact force between the tyres and the ground more constant. If vibrations in the engine 20 are detected which are of the same frequency as the brake actuation pulses then the control unit controls the valve block 26 so that a pulsed hydraulic pressure is supplied to the engine mounts 22 so as to counteract the vibrations.

Claims (9)

-4CLAIMS
1. A vehicle comprising wheels, brakes- for braking the wheels, a brake control unit arranged to control the brakes, controllable actuation means for controlling movement of a component of the vehicle, and sensing means wherein, the bra.he control unit is arranged to detect the occurrence of vibrations in the vehicle using the sensing means, to determine whether the vibrations are being produced by control of the brakes and, of they are, to control operation of the actuation means so as to counteract the vibrations.
2. A vehicle according to claim 1 wherein the actuation means forms part of the vehicle suspension system connecting the wheels of the vehicle to its body.
3. A vehicle according to claim I or claim 2 wherein the vibrations are vibrations of at least one wheel of the vehicle.
4. A vehicle according to claim 1 wherein the actuation means forms part of an engine mount.
5. A vehicle according to claim 1 or claim 4 wherein the vibrations are vibrations of at least a part of the power train of the vehicle.
6. A vehicle according to any foregoing claim further comprising a source of hydraulic pressure used by the brake control unit for control of the brakes, wherein the actuation means is also hydraulically operated using hydraulic pressure from the source.
7. A vehicle according to any foregoing claim wherein the control of the brakes is arranged to produce a pulsed braking torque.
8. A vehicle according to claim 7 wherein the control unit is arranged to control the actuators so as to produce a force which is co-ordinated with the control of the brakes.
9. A vehicle substantially as hereinbefore described with reference to the accompanying drawings.
P
GB9927955A 1999-11-27 1999-11-27 Vehicle braking control systems Expired - Lifetime GB2356685B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9927955A GB2356685B (en) 1999-11-27 1999-11-27 Vehicle braking control systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9927955A GB2356685B (en) 1999-11-27 1999-11-27 Vehicle braking control systems

Publications (3)

Publication Number Publication Date
GB9927955D0 GB9927955D0 (en) 2000-01-26
GB2356685A true GB2356685A (en) 2001-05-30
GB2356685B GB2356685B (en) 2003-01-29

Family

ID=10865186

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9927955A Expired - Lifetime GB2356685B (en) 1999-11-27 1999-11-27 Vehicle braking control systems

Country Status (1)

Country Link
GB (1) GB2356685B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1978278A3 (en) * 2007-04-03 2009-08-19 Denso Corporation Vehicle control system
EP1978279A3 (en) * 2007-04-03 2009-08-19 Denso Corporation Vehicle control system
EP2351657A3 (en) * 2010-01-12 2012-02-22 MAN Truck & Bus AG Commercial vehicle with an articulated axle as a vibration absorber

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108248585B (en) * 2018-03-12 2019-09-10 王卫琴 Make the convenient arrestment mechanism to break the barriers of new-energy automobile by damping softening

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2168441A (en) * 1984-11-06 1986-06-18 Honda Motor Co Ltd Anti-dive braking system for the front wheel of a motorcycle
US4831532A (en) * 1986-03-24 1989-05-16 Aisin Seiki Kabushiki Kaisha Antiskid control system
WO1991017069A1 (en) * 1990-05-04 1991-11-14 Alfred Teves Gmbh Combined control system for motor vehicles
EP0728603A1 (en) * 1994-09-14 1996-08-28 Unisia Jecs Corporation Vehicle suspension apparatus
WO1996031373A1 (en) * 1995-04-05 1996-10-10 Itt Automotive Europe Gmbh Process and circuit for damping vibrations in a vehicle drive system
JPH1142919A (en) * 1997-07-25 1999-02-16 Nissan Motor Co Ltd Suspension device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100274708B1 (en) * 1996-05-27 2000-12-15 다니구찌 이찌로오, 기타오카 다카시 Antilock Brake Control

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2168441A (en) * 1984-11-06 1986-06-18 Honda Motor Co Ltd Anti-dive braking system for the front wheel of a motorcycle
US4831532A (en) * 1986-03-24 1989-05-16 Aisin Seiki Kabushiki Kaisha Antiskid control system
WO1991017069A1 (en) * 1990-05-04 1991-11-14 Alfred Teves Gmbh Combined control system for motor vehicles
EP0728603A1 (en) * 1994-09-14 1996-08-28 Unisia Jecs Corporation Vehicle suspension apparatus
WO1996031373A1 (en) * 1995-04-05 1996-10-10 Itt Automotive Europe Gmbh Process and circuit for damping vibrations in a vehicle drive system
JPH1142919A (en) * 1997-07-25 1999-02-16 Nissan Motor Co Ltd Suspension device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1978278A3 (en) * 2007-04-03 2009-08-19 Denso Corporation Vehicle control system
EP1978279A3 (en) * 2007-04-03 2009-08-19 Denso Corporation Vehicle control system
US7970516B2 (en) 2007-04-03 2011-06-28 Denso Corporation Vehicle control system
US8082081B2 (en) 2007-04-03 2011-12-20 Denso Corporation Vehicle control system
EP2351657A3 (en) * 2010-01-12 2012-02-22 MAN Truck & Bus AG Commercial vehicle with an articulated axle as a vibration absorber

Also Published As

Publication number Publication date
GB2356685B (en) 2003-01-29
GB9927955D0 (en) 2000-01-26

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Legal Events

Date Code Title Description
COOA Change in applicant's name or ownership of the application
746 Register noted 'licences of right' (sect. 46/1977)

Effective date: 20050713

732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)

Free format text: REGISTERED BETWEEN 20131128 AND 20131204

PE20 Patent expired after termination of 20 years

Expiry date: 20191126