Apparatus for controlling the speed of a vehicle with internal combustion engine
AssigneeDiesel Kiki Co., Ltd.
InventorMasahito Ueno
Life of this patent
Estimating the term…
Abstract
In an apparatus for controlling the speed of a vehicle driven by an internal combustion engine so as to maintain the vehicle speed at a target vehicle speed, the apparatus has a load detector for detecting the load condition of the engine at each instant and the PID control characteristics for the engine speed control are changed in accordance with the result detected by the load detector whereby the actual vehicle speed is maintained at the desired speed with high response characteristics.
Claims8
A vehicle speed controlling apparatus for controlling the speed of an internal combustion engine with PID control to maintain the speed of a vehicle driven by the internal combustion engine at a desired target vehicle speed, said apparatus, comprising:
- means for generating a first signal indicative of the desired target vehicle speed;
- means for generating a second signal relating to the actual vehicle speed at each instant;
- means for producing a load signal relating to the load of the internal combustion engine;
- a deviation detecting means responsive to the first and second signals for producing a third signal indicative of the deviation of the actual vehicle speed from the target vehicle speed;
- a signal generating means responsive to at least the load signal and the third signal for generating a control signal which has been signal processed in such a way that PID control of the speed of the internal combustion engine can be carried out in accordance with desired PID control characteristic dependent upon at least the load signal;
- and
- means responsive to the control signal for driving a speed adjusting member of the internal combustion engine so as to maintain the actual vehicle speed at the target vehicle speed.
Dependencies are inferred from the claim text.