Downhill speed controller
First Claim
1. A downhill speed control system having control means for controlling the strength of applied brake to make an actual vehicle speed matched with a target speed when a vehicle runs down a slope, wherein:
- the control system includes target speed setting means capable of setting the target speed,said control means controls the strength of applied brake so that an actual vehicle speed is matched with a target speed set by said target speed setting means, andsaid target speed setting means includes a setting selection switch capable of selecting a plurality of target speeds set in advance.
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Accused Products
Abstract
The invention is intended to provide a downhill speed control system which employs a method of setting a target vehicle speed in advance, thereby improving controllability when a vehicle runs down a slope, and giving an operator improved operability in setting of the target vehicle speed. Brakes are controlled so that, when the vehicle runs down the slope, an actual vehicle speed is matched with a target speed set by a switch which can set the target speed by selectively or continuously changing plural preset speeds. Also, control constants for PID control are modified depending on settings of a downslope gradient setting switch and a load setting switch. When an acceleration computed from the actual vehicle speed is larger than a target acceleration, the strength of applied brake is increased.
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Citations
26 Claims
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1. A downhill speed control system having control means for controlling the strength of applied brake to make an actual vehicle speed matched with a target speed when a vehicle runs down a slope, wherein:
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the control system includes target speed setting means capable of setting the target speed, said control means controls the strength of applied brake so that an actual vehicle speed is matched with a target speed set by said target speed setting means, and said target speed setting means includes a setting selection switch capable of selecting a plurality of target speeds set in advance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A downhill speed control system having control means for controlling the strength of applied brake to make an actual vehicle speed matched with a target speed when a vehicle runs down a slope, wherein:
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the control system includes target speed setting means capable of setting the target speed, said control means controls the strength of applied brake so that an actual vehicle speed is matched with a target speed set by said target speed setting means, and said target speed setting means includes a setting speed switch capable of setting the target speed in a continuous way.
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19. A downhill speed control system having control means for controlling the strength of applied brake to make an actual vehicle speed matched with a target speed when a vehicle runs down a slope, wherein:
said control means sets control parameters corresponding to a previously taught condition of a downward slope, and controls the strength of applied brake in accordance with the set control parameters. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26)
Specification