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Thermal by-pass valve with pressure relief capability

A technology of bypass valve and pressure relief valve, which is applied in the direction of function valve type, control of lubricant pressure, balance valve, etc., and can solve the problems of not setting pressure relief device, etc.

Active Publication Date: 2011-10-19
DANA CANADA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The difficulty with this downstream arrangement of the bypass valve is that no pressure relief device is provided when excess pressure builds up at one end of the valve chamber including the actuator

Method used

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  • Thermal by-pass valve with pressure relief capability
  • Thermal by-pass valve with pressure relief capability
  • Thermal by-pass valve with pressure relief capability

Examples

Experimental program
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Effect test

Embodiment Construction

[0037] refer to figure 1 and 2 , shows an example of a bypass valve, generally indicated by reference numeral 14, which may be used in a heat exchanger circuit to control the flow of fluid, such as transmission fluid, to heat exchanger 12, which is connected to the first One and second conduits 28, 32 are connected. If the heat exchanger 12 is used to cool transmission fluid or oil, the heat exchanger may be a standard construction cooler or cooler unit. Conduits 28, 32 are connected to outlet port 50 and inlet port 56 of the valve. These ports may also be considered as orifice members connected to the valve chamber 48 for supplying and returning transmission fluid to the heat exchanger 12 . Conduits 34, 36 are also connected to ports 52, 58 in valve 14 and may be connected to vehicle components such as a transmission (not shown). Because the four conduits 28, 32, 34, 36 are connected to the valve, the valve 14 is referred to as a four-way bypass valve.

[0038] The valve...

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PUM

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Abstract

A by-pass valve for a heat exchanger circuit that includes a cooler (12) has a chamber (48) and ports for flow of fluid into and out of this chamber. A thermally sensitive actuator (64) is mounted in the chamber and can extend or retract in dependence on its body temperature as influenced by temperature of the fluid. A by-pass valve seat (154) is arranged in a valve housing along with a by-pass valve member (62) movable by the actuator into or out of engagement with the seat. A relief valve is mounted in the chamber and has a relief valve member (210) movable between closed and open positionsin order to close or open pressure relief ports. This relief valve member is biased towards the closed position. Excessive pressure build up in an end section of the chamber causes the relief valve member to move to its open position.

Description

technical field [0001] The invention relates to a bypass valve for a heat exchanger circuit in which there is a cooler or cooler unit for a heat exchange fluid. Background technique [0002] For example in the automotive industry, heat exchangers are used to cool or heat certain fluids such as engine oil or transmission fluid or oil. For example, in the case of transmission fluid, a heat exchanger called a cooler is used to cool the transmission fluid. The heat exchanger is usually located remote from the transmission and under normal operating conditions receives hot transmission oil from the transmission through a supply line, cools it and sends it back to the transmission through a return line. However, when the transmission is cool, such as at start-up, the transmission oil or fluid is very viscous, if at all, and does not flow easily through the heat exchanger. In this case, the transmission may starve of oil and cause damage or erratic performance. Cumulative damage...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K31/68F01M1/16F16H57/04F16K17/36F16K17/38F16N23/00
CPCF01P7/16F16K17/04F16K31/002G05D23/1333Y10T137/6579
Inventor J·O·夏帕德
Owner DANA CANADA CORP
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