Bypass temperature control valve, fuel filter and engine oil supply system

Abstract

The invention relates to the field of vehicles, and discloses a bypass temperature control valve, a fuel filter and an engine oil supply system. According to the bypass temperature control valve, in the diesel oil cooling process, the sealing rod is gradually reset, the diesel oil liquid level in the fuel oil filter is gradually reduced, due to the fact that when the sealing rod is located at the high-temperature pressure relief position, the external oil opening communicates with the assembly space, and in the sealing rod resetting process, the liquid level in the assembly space is basically as high as the liquid level in the pre-filtering oil cavity; the sealing rod is gradually reset along with continuous reduction of the temperature in the pre-filtering oil cavity, so that most fuel oil in the assembling space is returned into the pre-filtering oil cavity from the external oil port before the sealing rod moves to the proper-temperature blocking position, and when the sealing rod moves to the proper-temperature blocking position, the external oil port is disconnected from the assembling space, and at the moment, residual fuel oil in the assembling space is less; even if the temperature continues to be reduced and a small amount of residual fuel oil in the assembly space is subjected to wax precipitation, the sealing rod cannot be influenced to move to the low-temperature communication position.

Description

technical field [0001] The invention relates to the field of vehicles, in particular to a bypass temperature control valve, a fuel filter and an engine oil supply system. Background technique [0002] For diesel vehicles, the high-pressure oil pump pumps the fuel in the fuel tank to the engine. The commonly used diesel is No. 0 diesel, and No. 0 diesel has the characteristics of wax formation and condensation in low temperature environments. The zero diesel oil in the middle oil circuit of the diesel engine is waxed, which causes the diesel vehicle to have the defect of starting difficulty or even failure to start in low temperature environment. [0003] There is a filter on the middle oil road, through which the diesel oil is filtered to prevent impurities in the diesel oil from clogging the high-pressure pump. When starting at low temperature, due to the waxing of diesel oil, the resistance of diesel oil passing through the filter element of the filter is very large. In s...

AI Technical Summary

Problems solved by technology

When starting at low temperature, due to the waxing of diesel oil, the filter element resistance of diesel oil passing through the filter is very large. In severe cases, it may even cause blockage of the intermediate oil passage, affecting the normal starting of the engine.

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