Hydrostatic vehicle control
AssigneeCaterpillar Tractor Co.
InventorRandall M. Mitchell
Life of this patent
Estimating the term…
Abstract
An apparatus for regulating the speed of internal combustion engine of a hydrostatic system. A fuel control means acts to control the quantity of fuel delivered to the engine responsive to the immediate hydraulic flow demanded by operation of the hydrostatic system. The speed of the engine is set to one of a plurality of discrete levels in response to the required flow being within one of a corresponding plurality of preselected ranges.
Claims13
An apparatus for controlling an internal combustion engine having a rack for controlling a fuel injection pump, and at least one variable displacement hydraulic pump, the apparatus comprising:
- first means for delivering a first signal responsive to the hydraulic flow demanded of said variable displacement hydraulic pump;
- control means for receiving said first signal and delivering a desired engine speed signal responsive to the magnitude of said first signal;
- fuel control means for receiving said desired engine speed signal and delivering a signal responsive to the magnitude of said desired engine speed signal;
- and,
- rack actuator means for receiving said signal and controlling the supply of fuel to said engine responsive to the magnitude of said signal.
An apparatus for controlling an internal combustion engine having a rack for controlling a fuel injection pump, and at least one variable displacement hydraulic pump, the apparatus comprising:
- first means for delivering a first signal responsive to the hydraulic flow demanded of said variable displacement hydraulic pump;
- control means for receiving said first signal and delivering a desired engine speed signal of a first magnitude in response to said first signal being less than a first preselected magnitude for a preselected duration of time;
- fuel control means for receiving said desired engine speed signal and delivering a signal responsive to the magnitude of said desired engine speed signal;
- and
- rack actuator means for receiving said signal and controlling the supply of fuel to said engine responsive to the magnitude of said signal.
Dependencies are inferred from the claim text.