Hydraulic circuits for internal combustion engines
AssigneeUnisia Jecs Corporation
InventorsShoji Morita, Takehisa Kondoh, Yasushi Watanabe
Life of this patent
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Abstract
A hydraulic circuit includes first and second pumps, a first discharge passage receiving hydraulic fluid discharged from the first pump and communicating with a main gallery, a second discharge passage receiving hydraulic fluid discharged from the second pump and communicating with an actuator, a communication passage ensuring communication between the first and second discharge passages, and a relief valve arranged with the communication passage to be opened at a predetermined pressure for the second discharge passage.
Claims14
A hydraulic circuit for an internal combustion engine, comprising:
- first and second pumps;
- a main gallery providing hydraulic fluid to a portion of the internal combustion engine that requries lubrication;
- a first discharge passage receiving hydraulic fluid discharged from said first pump, said first discharge passage communicating with said main gallery;
- a valve controller actuated by receiving hydraulic fluid, said valve controller forming a closed circuit when said valve controller does not to operate;
- a second discharge passage receiving hydraulic fluid discharged from said second pump, said second discharge passage communicating with said valve controller;
- a communication passage ensuring communication between said first and second discharge passages;
- and
- a relief valve arranged with said communication passage, said relief valve being opened at a predetermined pressure in said second discharge passage.
A hydraulic circuit for an internal combustion engine, comprising:
- a pump with first and second discharge ports;
- a main gallery providing hydraulic fluid to a portion of the internal combustion engine that requires lubrication;
- a first discharge passage receiving hydraulic fluid discharged through said first discharge port of said pump, said first discharge passage communicating with said main gallery;
- a valve controller actuated by receiving hydraulic fluid, said valve controller forming a closed circuit when said valve controller does not operate;
- a second discharge passage receiving hydraulic fluid discharged from said second discharge port, said second discharge passage communicating with said valve controller;
- a communication passage ensuring communication between said first and second discharge passages;
- and
- a relief valve arranged with said communication passage, said relief valve being opened at a predetermined pressure in said second discharge passage.
Dependencies are inferred from the claim text.