Deceleration control system in a vehicle, vehicle including a deceleration control system, and deceleration control method
First Claim
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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Accused Products
Abstract
A deceleration control system in a vehicle comprises; a deceleration start detector; a memory for storing a normal state rule and a deceleration state rule to control a driving power, and a controller for controlling the driving power; wherein in the deceleration state rule, the driving power is changed based on the detection by a driving state detector, and a driving power decided in accordance with the deceleration state rule is greater than a driving power decided in accordance with the normal state rule according to the same driving state: and wherein the controller switches the normal state rule to the deceleration state rule and controls the driving power in accordance with the deceleration state rule, based on the detection by the driving state detector, when the deceleration start detector detects that the deceleration has started.
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Citations
15 Claims
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1. A deceleration control system in a vehicle comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A deceleration control system in a vehicle, comprising:
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a slip value detector for detecting a slip value of a drive wheel; and a controller controlling a driving power generated in a driving power source and transmitted to the drive wheel; wherein the controller is configured to; control the driving power source such that the driving power is greater when a deceleration state of the vehicle is detected than when the deceleration state is not detected; and compensate the driving power to reduce the driving power when the deceleration state is detected, and the slip value of the drive wheel detected by the slip value detector indicates that rotations of the drive wheel are greater than rotations of a driven wheel. - View Dependent Claims (13, 14, 15)
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Specification