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US 6,219,610 B1Granted
Turn control system for vehicle
AssigneeNissan Motor Co., Ltd.
InventorMichiki Araki
Life of this patent
Estimating the term…
Abstract
A vehicle turn control system has a controller connected to a steer angle detecting section, a vehicle speed sensor and a vehicle turn state detecting section. The controller calculates a target vehicle turn state from a steer angle and a vehicle speed and controls brake pressure supplied to a brake cylinder of each wheel of the vehicle according to a difference between the actual vehicle turn state and the target vehicle turn state. The controller executes a pre-charge control of a brake cylinder of a wheel to be braked next and restricts the pre-charge control according to the vehicle turn condition.
Claims14
A turn control system for a vehicle, comprising:
- a steer angle sensor sensing a steer angle of a wheel of the vehicle;
- a vehicle speed detector sensing a vehicle speed;
- a vehicle turn variable detecting section detecting a vehicle turn variable indicative of a turn state of the vehicle;
- a brake system applying a brake fluid pressure to two brake lines, respectively one of the two brake lines being connected to one of wheel cylinders for front right and rear right wheels and to wheel cylinders for front left and rear left wheels, the other of the two brake lines being connected to the other of the wheel cylinders for the front right and rear right wheels and to the other of the wheel cylinders for the front left and rear left wheels;
- and
- a controller arranged
- to calculate a target vehicle turn variable on the basis of the steer angle and the vehicle speed,
- to control said brake system according to a difference between the actual vehicle turn variable and the target vehicle turn variable,
- to apply a pre-charge pressure to the brake lines on the basis of the vehicle turn state before said brake system applies the brake fluid pressure to the brake lines, and
- to restrict the operation of applying the pre-charge pressure to one of the two brake lines when the other of the two brake lines has been put in a high pressure condition and when the other of the two brake lines put in the high pressure condition is further required to intensify the brake fluid pressure.
7 more elements
A turn control system for a vehicle comprising:
- steering angle detecting means for detecting information indicative of a steer angle of a wheel and outputting a steer angle signal indicative of the steer angle;
- vehicle speed detecting means for detecting information indicative of a vehicle speed and outputting a vehicle speed signal indicative of the vehicle speed;
- actual vehicle turn variable detecting means for detecting an actual vehicle turn variable indicative of a turn condition of the vehicle and outputting a vehicle turn signal indicative of the actual vehicle turn variable;
- target vehicle turn variable calculating means for calculating a target vehicle turn variable on the basis of the steer angle signal and the vehicle speed signal;
- brake pressure controlling means for controlling a brake pressure supplied to two brake lines according to a difference between the actual vehicle turn variable and the target vehicle turn variable, one of the two brake lines being connected to one of wheel cylinders for front right and rear right wheels and to one of wheel cylinders for front left and rear left wheels. the other of the two brake lines being connected to the other of the wheel cylinders for the front right and rear right wheels and to the other of the wheel cylinders for the front left and rear left wheels;
- pre-charging means for applying a pre-charge pressure to the brake lines on the basis of the vehicle turn condition before the brake pressure is applied to the brake lines;
- and
- pre-charge restricting means for restricting the operation of said pre-charging means to one of the two brake lines when the other of the two brake lines has been put in a high pressure condition and when the other of the two brake lines put in the high pressure condition is further required to intensify the brake pressure.
5 more elements
A method for controlling a vehicle turn, comprising:
- detecting information indicative of a steer angle of a wheel end outputting a steer angle signal indicative of the steer angle;
- detecting information indicative of a vehicle speed and outputting a vehicle speed signal indicative of the vehicle speed;
- detecting an actual vehicle turn variable indicative of a turn condition of the vehicle and outputting a vehicle turn signal indicative of the actual vehicle turn variable;
- calculating a target vehicle turn variable on the basis of the steer angle signal and the vehicle speed signal;
- controlling a brake hydraulic pressure supplied to two brake lines according to a difference between the actual vehicle turn variable and the target vehicle turn variable, one of the two brake lines being connected to one of wheel cylinders for front right and rear right wheels and to one of wheel cylinders for front left and rear left wheels, the other of the two brake lines being connected to the other of the wheel cylinders for the front right and rear right wheels and to the other of the wheel cylinders for the front left and rear left wheels;
- applying a pre-charge pressure to a brake cylinder to be next controlled by the operation of controlling brake pressure on the basis of the vehicle turn condition;
- and
- restricting the operation of applying the pre-charging pressure to one of the two brake lines when the other of the two brake lines has been put in a high pressure condition and when the other of the two brake lines put in the high pressure condition is further required to intensify the brake pressure.
5 more elements
Dependencies are inferred from the claim text.