Deceleration control apparatus for motor vehicle
First Claim
1. A deceleration control apparatus for installation on a vehicle, said deceleration control apparatus executing deceleration control based on running conditions of the vehicle including a turning state of the vehicle, said deceleration control apparatus comprising:
- turning state acquisition circuitry configured for acquiring successive values of a turning state quantity indicative of said turning state, andcontrol value acquisition circuitry configured for deriving successive values of a control quantity for executing said deceleration control, the control quantity values being respectively derived based on said acquired values of the turning state quantity;
wherein said deceleration control apparatus comprises guard processing circuitry configured for executing guard processing during execution of said deceleration control, said guard processing comprising;
detecting a commencement of oscillation of said turning state quantity while said vehicle is running along a curved section of a route,when said commencement of oscillation is detected, establishing a guard value of said turning state quantity as a value not exceeding a currently acquired value of said turning state quantity,prior to detection of said oscillation commencement, executing said deceleration control based upon said successive values of said control quantity derived by said control value acquisition circuitry, andsubsequent to detection of said oscillation commencement, executing said deceleration control based upon a value of said control quantity derived from said guard value of the turning state quantity.
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Accused Products
Abstract
When a vehicle runs along a curved path, successive values of a speed limit are calculated based on the yaw rate of the vehicle, and values of acceleration demand are calculated and applied to control the actual vehicle speed based on the speed limit. If commencement of oscillation of the yaw rate and acceleration demand is detected, due to running along the curved path, guard processing is applied to the values of speed limit used to calculate the acceleration demand or is applied to the acceleration demand, such as to prevent the acceleration demand from varying in a direction that would increase the speed limit. Instability of deceleration control due to the oscillation is thereby substantially suppressed.
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Citations
17 Claims
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1. A deceleration control apparatus for installation on a vehicle, said deceleration control apparatus executing deceleration control based on running conditions of the vehicle including a turning state of the vehicle, said deceleration control apparatus comprising:
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turning state acquisition circuitry configured for acquiring successive values of a turning state quantity indicative of said turning state, and control value acquisition circuitry configured for deriving successive values of a control quantity for executing said deceleration control, the control quantity values being respectively derived based on said acquired values of the turning state quantity; wherein said deceleration control apparatus comprises guard processing circuitry configured for executing guard processing during execution of said deceleration control, said guard processing comprising; detecting a commencement of oscillation of said turning state quantity while said vehicle is running along a curved section of a route, when said commencement of oscillation is detected, establishing a guard value of said turning state quantity as a value not exceeding a currently acquired value of said turning state quantity, prior to detection of said oscillation commencement, executing said deceleration control based upon said successive values of said control quantity derived by said control value acquisition circuitry, and subsequent to detection of said oscillation commencement, executing said deceleration control based upon a value of said control quantity derived from said guard value of the turning state quantity. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification