Controller and control method of electric pump feedback controll

Details Controller and control method of electric pump feedback controll Controller and control method of electric pump feedback controll

1999-04-16

2000-04-18

Ta, Khoi Q.

Interrelated power delivery controls, including engine control

Transmission control

Transmission controlled by engine

417 443, G05D 1600

Patent

active

06050918&

ABSTRACT:
When the pressure of a discharge fluid of an electric pump (1) exceeds a predetermined relief pressure, relief valve (6) discharges a part of the fluid to a drain passage (5). A sensor (8, 10, 11) detects a drain flowrate of the drain passage (5), and feedback control of the rotation speed of the electric pump (1) is performed so that the drain flowrate coincides with a predetermined flowrate. Due to this feedback control, the necessary fluid pressure is maintained while suppressing the drain flowrate to the minimum.

REFERENCES:
patent: 5520517 (1996-05-01), Sipin
patent: 5664937 (1997-09-01), Takahashi et al.
patent: 5669761 (1997-09-01), Kobayashi
patent: 5670852 (1997-09-01), Chipperfield et al.

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