Engine control based on flow rate and pressure for hydraulic...

Details Engine control based on flow rate and pressure for hydraulic... Engine control based on flow rate and pressure for hydraulic...

2005-11-01

2005-11-01

Look, Edward K. (Department: 3745)

Power plants

Pressure fluid source and motor

Having condition responsive control in a system of...

C417S034000, C417S364000

Reexamination Certificate

active

06959545

ABSTRACT:
A system for a hydraulically driven vehicle includes an engine having multiple, selectively operating cylinder-pump banks producing fluid flow at an outlet, a pump/motor having a variable flow rate including an inlet for driving the wheels, a hydraulic line having a line pressure and connecting the outlet and the inlet, sensors producing signal representing line pressure, pump/motor speed, pump/motor displacement, and a controller for determining a target hydraulic system parameter, determining, based at least in part on the flow rate of the pump/motor and a flow rate produced by each engine cylinder bank, a number of operating cylinder-pump banks that is required to produce the target hydraulic system parameter, and in response to determining the required number of operating cylinder-pump banks, adjusting an engine operating parameter of a cylinder-pump bank such that the required number of cylinder-pump banks operate.

REFERENCES:
patent: 2473204 (1949-06-01), Huber
patent: 3016689 (1962-01-01), Bayer et al.
patent: 4326380 (1982-04-01), Rittmaster et al.
patent: 4382748 (1983-05-01), Vanderlaan
patent: 4435133 (1984-03-01), Meulendyk
patent: 4589380 (1986-05-01), Coad
patent: 4791786 (1988-12-01), Stuyvenberg

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