Vehicle cruise control device and method
First Claim
1. A vehicle cruise control device for controlling a throttle opening in accordance with a deviation between a set target vehicle speed and an actual vehicle speed, wherein reference acceleration in a segment of acceleration is set in advance and, based on said reference acceleration and actual acceleration, a limiting process that limits said throttle opening is performed in calculation of the throttle opening.
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Accused Products
Abstract
A maximum permissible acceleration is calculated so as to take into account vehicle stability, driver'"'"'s comfort, road surface information and traffic information, driver'"'"'s specific taste in acceleration and deceleration, and the like. An acceleration limiting process is carried out, in which a feedback gain in vehicle speed feedback control is corrected as may be necessary based on a relationship between the maximum permissible acceleration and actual acceleration information so as to keep the actual acceleration within the maximum permissible acceleration. The present invention thereby makes it possible to control a vehicle speed within a desired acceleration range even under conditions, in which there is a large vehicle speed deviation as in a resume mode, causing an excessively large acceleration or deceleration to tend to occur. Auto cruise control offering an outstanding safety and comfort can thus be implemented.
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Citations
13 Claims
- 1. A vehicle cruise control device for controlling a throttle opening in accordance with a deviation between a set target vehicle speed and an actual vehicle speed, wherein reference acceleration in a segment of acceleration is set in advance and, based on said reference acceleration and actual acceleration, a limiting process that limits said throttle opening is performed in calculation of the throttle opening.
- 6. A vehicle cruise control device for controlling a throttle opening in accordance with a deviation between a set target vehicle speed and an actual vehicle speed, wherein either a vehicle speed feedback control or an acceleration feedback control is selected according to a running condition.
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12. A vehicle cruise control method, comprising the steps of:
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inputting a sensor signal or a cruise control signal;
calculating a condition for a cruise control;
calculating a target vehicle speed based on said condition for the cruise control;
calculating a maximum permissible acceleration based on said cruise control condition;
calculating a target throttle opening based on said maximum permissible acceleration; and
controlling a vehicle speed in accordance with said target throttle opening. - View Dependent Claims (13)
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Specification