Pump/valve assembly and a cooling circuit containing such an...

Details Pump/valve assembly and a cooling circuit containing such an... Pump/valve assembly and a cooling circuit containing such an...

2006-08-01

2006-08-01

Argenbright, Tony M. (Department: 3747)

Internal-combustion engines

Cooling

Automatic coolant flow control

C123S041150, C123S041080, C123S041440

Reexamination Certificate

active

07082902

ABSTRACT:
A pump/valve assembly forming part of a circuit for circulating a liquid fluid has a pump and a proportional-control valve unit (2) in series with the pump. The valve unit (2) has a valve (3), an electrical actuator (4) and a position sensor (5) which are fixed to a movable member (3′) sealing the valve (3) for displacement therewith, and control means (6) controlling the actuator (4) according to the position of the movable member (3′) indicated by the sensor (5) and a reference signal. The valve unit (2) is subjected to a procedure indexing the position of the movable member (3′) and setting parameters for the control means (6) at the beginning of each new operating cycle of the assembly, and the pump (1) is rotated at a constant speed selected from a limited number of predetermined speeds at least during part of each operating cycle.

REFERENCES:
patent: 6164248 (2000-12-01), Lehmann
patent: 6745995 (2004-06-01), Hu et al.
patent: 6786183 (2004-09-01), Hoelle et al.
patent: 2001/0054395 (2001-12-01), Stephan et al.
patent: 2004/0065275 (2004-04-01), Hayami et al.
patent: 40 33 261 (1992-04-01), None
patent: 199 33 794 (2000-02-01), None
patent: 0 371 225 (1990-06-01), None
patent: 0 969 190 (2000-01-01), None

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