Oil pump pressure control device
AssigneeYamada Manufacturing Co., Ltd.
InventorsYasunori Ono, Keiichi Kai, Kenichi Fujiki, Kosuke Yamane
Life of this patent
Estimating the term…
Abstract
A device including a first discharge passage from a first rotor assembly to an engine, a first return passage that returns to an intake side of the first rotor assembly, a second discharge passage from a second rotor assembly to the engine, a second return passage that returns to an intake side of the second rotor assembly, and a pressure control valve whose valve main body is provided between a discharge port from the second rotor assembly and the first discharge passage. The first discharge passage and the second discharge passage are coupled, and a flow passage control is executed in each of: a low revolution range; an intermediate revolution range; and a high revolution range.
Claims14
An oil pump pressure control device comprising:
- a first discharge passage for feeding oil from a first rotor assembly to an engine;
- a first return passage that returns to an intake passage of the first rotor assembly;
- a second discharge passage for feeding oil from a second rotor assembly to the engine;
- a second return passage that returns to an intake passage of the second rotor assembly;
- and
- a pressure control valve whose valve main body configured from a first valve portion, a narrow diameter coupling portion and a second valve portion is provided between a discharge port from the second rotor assembly and the first discharge passage,
- wherein an end portion side of the second discharge passage is coupled to a position along the first discharge passage, and a flow passage control is executed in each of:
- a low revolution range in a state in which only the first discharge passage and the second discharge passage are open and communicate with each other;
- an intermediate revolution range in a state in which the first discharge passage and the second discharge passage are open and communicate with each other and the first return passage is closed while the second return passage is open;
- and
- a high revolution range in a state in which the second discharge passage is closed while the first discharge passage is open, thereby canceling the communication thereof, and the first return passage and the second return passage are open.
An oil pump pressure control device comprising:
- a first discharge passage for feeding oil from a first rotor assembly to an engine;
- a first return passage that returns to an intake passage of the first rotor assembly;
- a second discharge passage for feeding oil from a second rotor assembly to the engine;
- a second return passage that returns to an intake passage of the second rotor assembly;
- and
- a pressure control valve whose valve main body configured from a first valve portion, a narrow diameter coupling portion and a second valve portion is provided between a discharge port from the second rotor assembly and the first discharge passage,
- wherein an end portion side of the second discharge passage is coupled to a position along the first discharge passage, and a flow passage control is executed in each of:
- a low revolution range in a state in which only the first discharge passage and the second discharge passage are open and communicate with each other;
- an intermediate revolution range in a state in which the first discharge passage and the second discharge passage are open and communicate with each other and the first return passage is closed while the second return passage is open;
- and
- a high revolution range in a state in which the second discharge passage is closed while the first discharge passage is open, thereby canceling the communication thereof, and the first return passage and the second return passage are open,
- wherein the first discharge passage does not pass through the pressure control valve.
Dependencies are inferred from the claim text.