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Exhaust structure of high-pressure oil pump

A high-pressure oil pump and low-pressure technology, which is applied in the field of exhaust structure of high-pressure oil pumps, can solve problems such as air not being in the circuit, affecting engine starting performance, and difficulty in functioning of the deflation screw, etc., and achieves the effect of convenient exhaust

Inactive Publication Date: 2015-04-08
JIANGLING MOTORS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The exhaust of the existing economical high-pressure oil pump is to add a bleed screw between the vane pump and the overflow valve (see Figure 5 ), when exhausting, it is necessary to loosen the air release screw and press the hand oil pump on the low pressure oil circuit at the same time. ) cannot open the overflow valve (2.3bar), and the air cannot form a circuit, which affects the starting performance of the engine

Method used

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  • Exhaust structure of high-pressure oil pump
  • Exhaust structure of high-pressure oil pump
  • Exhaust structure of high-pressure oil pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0014] Example: see figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 .

[0015] An exhaust structure of a high-pressure oil pump, including a relief valve 1, an oil drain groove 2 is opened on the spool of the relief valve 1, and the low-pressure oil circuit inlet 4 of the relief valve 1 communicates with the overflow through the oil drain groove 2 The overflow outlet hole 3 of the valve 1 is connected to the oil return circuit of the outer circulation.

[0016] The oil drain groove 2 is a flat groove with a groove depth of 0.05-0.07 mm.

[0017] The description of the improved oil pump circuit: see attached Figure 4 ,

[0018] (1) Fuel passes through the filter, vane pump, fuel quantity control unit and fuel inlet valve from the fuel tank to the high-pressure plunger cavity.

[0019] (2) Part of the excess oil returns to the oil tank through the external return oil, and the other part returns to the oil inlet end of the vane pump through the internal return oi...

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Abstract

The invention relates to the field of diesel engines, and relates to an exhaust structure of a high-pressure oil pump. The exhaust structure comprises an overflow valve, wherein a valve core of the overflow valve is provided with an oil drainage groove; a low-pressure oil way inlet of the overflow valve is communicated with an overflow outlet hole of the overflow valve through the oil drainage groove; the outlet hole is communicated with an outer circulation oil return line; the oil drainage groove is a flat groove with depth of 0.05-0.07 mm. The exhaust structure has the beneficial effects that a bleed screw is saved, the exhaust is convenient and is not limited to an external space, and the exhaust can be directly performed through a hand oil pump before the overflow valve is opened.

Description

technical field [0001] The invention relates to the field of diesel engines, in particular to an exhaust structure of a high-pressure oil pump. Background technique [0002] The exhaust of the existing economical high-pressure oil pump is to add a bleed screw between the vane pump and the overflow valve (see Figure 5 ), when exhausting, it is necessary to loosen the air release screw and press the hand oil pump on the low pressure oil circuit at the same time. ) cannot open the overflow valve (2.3bar), and the air cannot form a circuit, which affects the starting performance of the engine. Contents of the invention [0003] The object of the present invention is to solve the above problems, and provide an exhaust structure of a high-pressure oil pump. [0004] In order to realize the purpose of the present invention, the technical scheme adopted in the present invention is: [0005] An exhaust structure of a high-pressure oil pump, including a relief valve, an oil disch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M37/20
Inventor 邹季灿刘昌孔凡志杨文萍
Owner JIANGLING MOTORS
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