Relief device of oil circuit of engine
First Claim
1. A relief device of an oil circuit of an engine, the relief device comprising:
- an oil pump;
an upstream flow path that is provided from a side of a discharge portion of the oil pump to the engine;
an oil pressure relief valve that performs an oil relief with a movement of a valve body by a pressure of oil; and
a temperature-sensitive relief valve that performs the oil relief by sensing an oil temperature of the oil, and opening and closing steplessly,wherein the oil pressure relief valve and the temperature-sensitive relief valve are disposed in parallel in the upstream flow path,wherein a temperature-sensitive drive portion, including a thermowax, and an auxiliaiy elastic Member are respectively attached on opposite sides of the temperature-sensitive relief valve in an axial direction thereof, andwherein, in a traversal direction with respect to an arrangement of the thermowax and the auxiliary elastic member in the axial direction, the oil flows to enter the temperature-sensitive relief valve.
1 Assignment
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Accused Products
Abstract
[Problem] To provide a relief device for an oil circuit of an engine provided with an oil pressure relief valve and a temperature-sensitive relief valve, with which it is possible for oil to be relieved (expelled) at the intended pressure regardless of the oil temperature, and with which it is possible to simplify the configuration. [Solution] The relief device comprises an oil pump (9), an upstream channel (61) provided from a discharge side of the oil pump (9) to an engine (E), an oil pressure relief valve (A) for relieving oil due to the valve body being moved by oil pressure, and a temperature-sensitive relief valve (B) for relieving oil by sensing the oil temperature and continuously opening and closing. The oil pressure relief valve (A) and the temperature-sensitive relief valve (B) are arranged in parallel in the upstream channel (61).
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Citations
21 Claims
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1. A relief device of an oil circuit of an engine, the relief device comprising:
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an oil pump; an upstream flow path that is provided from a side of a discharge portion of the oil pump to the engine; an oil pressure relief valve that performs an oil relief with a movement of a valve body by a pressure of oil; and a temperature-sensitive relief valve that performs the oil relief by sensing an oil temperature of the oil, and opening and closing steplessly, wherein the oil pressure relief valve and the temperature-sensitive relief valve are disposed in parallel in the upstream flow path, wherein a temperature-sensitive drive portion, including a thermowax, and an auxiliaiy elastic Member are respectively attached on opposite sides of the temperature-sensitive relief valve in an axial direction thereof, and wherein, in a traversal direction with respect to an arrangement of the thermowax and the auxiliary elastic member in the axial direction, the oil flows to enter the temperature-sensitive relief valve. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A relief device, comprising:
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an oil pump; an upstream flow path that extends between a discharge portion of the oil pump and an engine; an oil pressure relief valve that performs an oil relief with a movement of a valve body by a pressure of oil; and a temperature-sensitive relief valve that performs the oil relief by sensing a temperature of the oil, wherein the oil pressure relief valve and the temperature-sensitive relief valve branch off, in parallel and independent of each other, from the upstream flow path, wherein a temperature-sensitive drive portion, including a thermowax, and an auxiliary elastic member are respectively attached on opposite sides of the temperature-sensitive relief valve in an axial direction thereof, and wherein, in a traversal direction with respect to an arrangement of the thermowax and the auxiliary elastic member in the axial direction, the oil flows to enter the temperature-sensitive relief valve.
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20. A relief device of an oil circuit of an engine, the relief device comprising:
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an oil pump; an upstream flow path that is provided from a side of a discharge portion of the oil pump to the engine; an oil pressure relief valve that performs oil relief with movement of a valve body by pressure of oil; and a temperature-sensitive relief valve that performs the oil relief by sensing an oil temperature of the oil and opening and closing steplessly, wherein the oil pressure relief valve and the temperature-sensitive relief valve are disposed in parallel in the upstream flow path, wherein the temperature-sensitive relief valve includes a temperature-sensitive valve body and a temperature-sensitive housing, wherein the temperature-sensitive valve body includes a temperature-sensitive drive portion and a temperature-sensitive valve portion, wherein the temperature-sensitive valve portion includes an inflow hole, wherein the temperature-sensitive drive portion includes a piston that extends and retracts in response to an oil temperature detected with a thermowax, wherein the temperature-sensitive valve portion is connected to the piston, wherein a second relief outflow portion is formed in an inner peripheral side surface of the temperature-sensitive housing, wherein the temperature-sensitive valve portion is capable of opening and closing the second relief outflow portion by sliding, wherein the temperature-sensitive valve portion comprises a cylindrical portion and a top portion, and includes the inflow hole that is formed through the top portion in an axial direction thereof, and wherein, in a traversal direction with respect to an arrangement of the thermowax and an auxiliary elastic member attached on opposite sides of the temperature-sensitive relief valve in the axial direction, the oil flows to enter the temperature-sensitive relief valve. - View Dependent Claims (21)
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Specification