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Deceleration control system in a vehicle, vehicle including a deceleration control system, and deceleration control method

  • US 9,482,170 B2
  • Filed: 07/20/2011
  • Issued: 11/01/2016
  • Est. Priority Date: 07/21/2010
  • Status: Active Grant
First Claim
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1. A deceleration control system in a vehicle comprising:

  • a throttle valve which changes its opening degree to change an air-intake amount to change torque generated in an engine;

    a driving state detector for detecting a driving state of the vehicle; and

    a controller including a memory for storing a control rule including a normal state rule which defines a target opening degree of the throttle valve corresponding to an operation position of an acceleration operation member operated by a driver and a deceleration state rule which defines the target opening degree of the throttle valve corresponding to at least one of an engine speed and a reduction gear ratio in a transmission,wherein the controller is configured to;

    derive the target opening degree based on the operation position of the acceleration operation member detected by the driving state detector with reference to the normal state rule;

    detect whether or not deceleration of the vehicle has started, and detect a slip value of a drive wheel, based on the driving state detected by the driving state detector during a period in which the controller is referring to the normal state rule;

    derive the target opening degree according to at least one of the engine speed and the reduction gear ratio detected by the driving state detector with reference to the deceleration state rule, when the controller detects that the deceleration of the vehicle has started, the target opening degree derived according to the deceleration state rule having a value which is greater than a value of a fully closed position; and

    compensate the target opening degree derived with reference to the deceleration state rule to reduce the target opening degree, when the slip value of the drive wheel indicates that rotations of the drive wheel are greater than rotations of a driven wheel.

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