US 5,842,754 AGranted

Turn control apparatus for a vehicle

AssigneeMitsubishi Jidosha Kogyo Kabushiki Kaisha

InventorYoshiaki Sano

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Abstract

A vehicle turn control apparatus has an electronic control unit including a control start/end determination section (80) in which two threshold values associated with the start timing of yaw moment control in the understeer and oversteer modes respectively. The determination section (80) outputs a control beginning flag (Fymc=1) when the absolute value of required moment (.gamma. d) exceeds the absolute value of either threshold value. By providing such a control start condition, smooth yaw moment control can be achieved. Also, by setting the absolute value of threshold value in the oversteer mode at a value smaller than the absolute value of threshold value in the understeer mode, the yaw moment control in the oversteer mode is started at early timing. A restoration moment is quickly produced on the vehicle in the oversteer mode, thereby preventing spinning of the vehicle.

Claims8

Dependent claims

A turn control apparatus for a vehicle, which selectively carries out yaw acceleration control where a braking force difference to generate a turning moment on the vehicle is produced between target wheels to be controlled and yaw inhibition control where a braking force difference to generate a restoration moment on the vehicle is produced between the target wheels to be controlled, comprising:

yaw rate detection means for detecting an actual yaw rate for the vehicle;
target yaw rate computing means for computing a target yaw rate for the vehicle in accordance with an operating condition of the vehicle and driver's manipulations on the vehicle;
required control variable derivation means for deriving a required controlled variable associated with the yaw inhibition control and the yaw acceleration control in accordance with the actual yaw rate detected by said yaw rate detection means and the target yaw rate computed by said target yaw rate computing means;
and
timing means for setting start timing of the yaw inhibition control and start timing of the yaw acceleration control,
wherein the start timing of the yaw inhibition control is set so as to be earlier than the start timing of the yaw acceleration control.

3 more elements

A turn control apparatus, which selectively increases a turning moment of a vehicle in a yaw acceleration control, and decreases the turning moment of the vehicle in a yaw inhibition control, the apparatus comprising:

first detecting means for detecting a first parameter associated with the vehicle;
second detecting means for detecting a second parameter associated with the vehicle;
target yaw rate calculating means for calculating a target yaw rate based on said first parameter and said second parameter;
calculating means for calculating a required control value associated with the yaw inhibition control and the yaw acceleration control based on said first parameter and said calculated target yaw rate;
and
start timing setting means for setting a yaw inhibition control start timing when the yaw inhibition control is required and a yaw acceleration control start timing when the yaw acceleration control is required, said start time setting means setting said yaw inhibition control start timing shorter than said yaw acceleration control start timing such that the yaw inhibition control starts within a shorter period of time than the yaw acceleration control.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 08/776,822Filed 7 Feb 1997
Priority: JP 7-1437129 Jun 1995
Granted: 1 Dec 1998
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

B60T 8/246
Responsive to vehicle inclination or change of direction, e.g. negotiating bends: change of direction
B60T 8/1755
Using electrical or electronic regulation means to control braking: brake regulation specially adapted to control the stability of the vehicle,…
B60T 2220/03
Monitoring, detecting driver behaviour; Signalling thereof; Counteracting thereof: driver counter-steering; Avoidance of conflicts with ESP control
B60T 2220/04
Monitoring, detecting driver behaviour; Signalling thereof; Counteracting thereof: pedal travel sensor, stroke sensor; Sensing brake request