Displacement of a variable displacemet hydraulic pump and speed

Details Displacement of a variable displacemet hydraulic pump and speed Displacement of a variable displacemet hydraulic pump and speed

1990-08-23

1991-09-24

Look, Edward K.

Power plants

Pressure fluid source and motor

Control by independently operated punch card, tape, digital...

60422, 60423, 60427, 60428, 60434, 60435, 60449, F16D 3100

Patent

active

050503790

ABSTRACT:
A controller for a hydraulic fluid flow control apparatus determines a quantity necessary for loading/unloading operations according to a signal from a lever operating degree detector, and controls a variable displacement type hydraulic pump to obtain the quantity. Accordingly, unnecessary hydraulic fluid flow in the hydraulic apparatus is reduced. The controller determines when a vehicle is stopped according to a signal from a clutch ON-OFF detector or a neutral sensor, and can raise the rpm of an engine. Therefore, when the loading/unloading operations are being executed while the vehicle is stopped, there is no need to operate the accelerator pedal.

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patent: 4768339 (1988-09-01), Aoyagi et al.
patent: 4967577 (1990-11-01), Izumi et al.

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