Oil circuit for oil pump and diesel-powered motor vehicle

Abstract

The invention relates to the field of manufacturing of automobile diesel engines, in particular to an oil circuit for an oil pump and a diesel-powered motor vehicle. The oil circuit for the oil pump is used for a light-duty diesel engine and comprises an oil tank, an oil transfer pump and a common-rail pipeline which are communicated in sequence. The common-rail pipeline is communicated with an oil return pipe, and the end, away from the common-rail pipeline, of the oil return pipe is communicated with the oil tank; the oil transfer pump comprises a lubricating pipeline and a plunger pump which is communicated with the oil transfer pump, and the lubricating pipeline is used for lubricating the plunger pump; the oil transfer pump further comprises a pump inner cavity which is used for collecting leak oil in the plunger pump and lubricating oil of the plunger pump, and the pump inner cavity is communicated with the oil return pipe. By means of the oil circuit for the oil pump, the stability and the precision of the oil mass can be ensured, the load of the oil transfer pump is reduced, and the oil feeding capacity and the reliability of the oil transfer pump at the low rotational speed are improved.

Description

technical field [0001] The invention relates to the field of automobile diesel engine manufacturing, in particular to an oil pump oil circuit and a diesel motor vehicle. Background technique [0002] In the oil pump oil circuit of the existing diesel engine, the oil inlet metering valve has oil leakage when the valve is closed. In order to discharge the leaked fuel, a zero fuel throttle valve must be added in front of the oil inlet metering valve of the oil pump oil circuit. Such a setting method makes the oil circuit of the oil pump relatively complicated after adding the zero oil volume throttle valve. Secondly, due to the small hole diameter of the zero-oil throttle valve, there is a risk of blocking the oil path of the oil pump, and the zero-oil throttle valve is not easy to process. [0003] In addition, the low-speed oil supply performance of the existing oil pump oil circuit is poor. Contents of the invention [0004] The first object of the present invention is t...

AI Technical Summary

Problems solved by technology

Such a setting method makes the oil circuit of the oil pump relatively complicated after adding a zero oil volume throttle valve

Secondly, due to the small hole diameter of the zero oil throttle valve, there is a risk of blocking the oil pump oil circuit, and the zero oil throttle valve is not easy to process

[0003] In addition, the low-speed oil supply performance of the existing oil pump oil circuit is poor

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