VEHICLE START CONTROL DEVICE AND METHOD
First Claim
1. A vehicle start control device for conducting neutral control and hill hold control, wherein, in the neutral control, if predetermined neutral control conditions are satisfied in a drive position, a coupling device provided in a power transmission path between an engine and drive wheels is brought into a slipping state or a released state and thus the power transmission path is kept in a power transfer suppressing state to reduce an engine idling load and, in the hill hold control, if predetermined hill hold control conditions are satisfied on a hill, a brake force is generated in a motor vehicle to hold the motor vehicle against movement on the hill, comprising:
- a neutral release mode controller that increases a torque transfer capacity of the coupling device in such a manner that the coupling device is engaged more gently in case of releasing the neutral control under the hill hold control than in case of releasing the neutral control when the hill hold control is not executed.
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Accused Products
Abstract
A vehicle start control device executes a neutral control and a hill hold control, wherein, in the neutral control, a clutch provided in a power transmission path is brought into a slipping state or a released state to reduce the engine idling load and in the hill hold control, a brake force is generated to hold the vehicle against movement on a hill. A neutral release mode controller is employed to increase a torque transfer capacity of the clutch so that the clutch is engaged more gently when the neutral control is released under the hill hold control than in case of releasing the neutral control when the hill hold control is not executed. This suppresses generation of a shock that would be caused by engagement of the clutch when the neutral control is released under the hill hold control.
28 Citations
20 Claims
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1. A vehicle start control device for conducting neutral control and hill hold control, wherein, in the neutral control, if predetermined neutral control conditions are satisfied in a drive position, a coupling device provided in a power transmission path between an engine and drive wheels is brought into a slipping state or a released state and thus the power transmission path is kept in a power transfer suppressing state to reduce an engine idling load and, in the hill hold control, if predetermined hill hold control conditions are satisfied on a hill, a brake force is generated in a motor vehicle to hold the motor vehicle against movement on the hill, comprising:
a neutral release mode controller that increases a torque transfer capacity of the coupling device in such a manner that the coupling device is engaged more gently in case of releasing the neutral control under the hill hold control than in case of releasing the neutral control when the hill hold control is not executed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A vehicle start control method for conducting neutral control and hill hold control, wherein, in the neutral control, if predetermined neutral control conditions are satisfied in a drive position, a coupling device provided in a power transmission path between an engine and drive wheels is brought into a slipping state or a released state and thus the power transmission path is kept in a power transfer suppressing state to reduce an engine idling load and, in the hill hold control, if predetermined hill hold control conditions are satisfied on a hill, a brake force is generated in a motor vehicle to hold the motor vehicle against movement on the hill, comprising:
increasing a torque transfer capacity of the coupling device in such a manner that the coupling device is engaged more gently in case of releasing the neutral control under the hill hold control than in case of releasing the neutral control when the hill hold control is not executed. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
Specification