Pump system and decoupler for supplying pressurized...

Details Pump system and decoupler for supplying pressurized... Pump system and decoupler for supplying pressurized...

2011-01-11

2011-01-11

Chang, Ching (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

Hydraulic system

C123S366000, C251S014000, C417S390000

Reexamination Certificate

active

07866287

ABSTRACT:
A pump system for supplying pressurized hydraulic fluid to a hydraulic valve actuation system for operating engine valves of an internal combustion engine comprises a substantially conventional main pump, driven by the engine, which supplies the necessary volume of pressurized hydraulic fluid when the engine is running. The system comprises a booster pump that supplies in conjunction with the main pump the necessary volume of hydraulic fluid during starting/cranking of the engine. The main pump is preferably designed and constructed for operating efficiency during engine operating conditions while the booster pump is preferably designed and constructed for operating efficiency during cranking/starting of the engine.

REFERENCES:
patent: 5410994 (1995-05-01), Schechter
patent: 6553966 (2003-04-01), Cornell et al.
patent: 7357105 (2008-04-01), Moriwaki et al.
patent: 2006/0157010 (2006-07-01), Moriwaki et al.

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