Single cylinder fuel cut-off high-speed diesel engine unit pump

An oil-cut, single-cylinder technology, applied in mechanical equipment, engine components, fuel injection pumps, etc., can solve problems such as hidden dangers of easily damaged core components of diesel engines

Active Publication Date: 2015-03-11
NANYUE FUEL INJECTION SYST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the shortcomings of the existing diesel engine that the core components of the diesel engine are easily damaged and there ar

Method used

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  • Single cylinder fuel cut-off high-speed diesel engine unit pump
  • Single cylinder fuel cut-off high-speed diesel engine unit pump

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Embodiment Construction

[0020] The following is attached figure 1 and attached figure 2 Examples further describe the present invention in detail.

[0021] see figure 1 with figure 2 , the single-cylinder anti-oil circuit fault unit fuel injection pump shown in the figure includes a pump body 100, and a plunger valve installation cavity 110 is arranged in the pump body 100 along the axis direction of the pump body 100, and the plunger valve is installed A constricted section 120 is provided at the upper middle of the chamber 110 , and the constricted section 120 divides the plunger valve installation chamber 110 into an upper plunger valve installation chamber 111 and a lower plunger valve installation chamber 112 . There is a necking hole 121 coaxial with the plunger installation cavity 110 in the necking section 120, and a radial fuel hole 130 is opened on the pump body above the necking section 120, and the inner end of the fuel hole 130 is connected with the upper plunger. The valve install...

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Abstract

The invention discloses a single cylinder fuel cut-off high-speed diesel engine unit pump. The single cylinder fuel cut-off high-speed diesel engine unit pump comprises a pump body, a plunger valve, a delivery valve seat and a delivery valve body. When fuel leakage is caused by faults such as the combustion difficulty which is caused by the low pressure generated due to pipeline oil leakage between a fuel spray nozzle of a fuel injection pump and an engine combustion chamber or when fuel leakage is caused by sealing of the engine combustion chamber, a user needs to unscrew a fuel cut-off shaft at the moment, an oil cut-off steel ball ejected by the oil cut-off shaft is disengaged from the sealing conical face of a first fuel cut-off hole outlet under the action of fuel pressure, high-pressure fuel generated when a plunger rises flows back into a low-pressure oil inlet and return cavity through a second fuel outlet passageway, a first fuel cut-off hole, a second fuel cut-off hole, a third fuel cut-off hole and a fourth fuel cut-off hole, the second fuel outlet passageway, the first fuel cut-off hole, the second fuel cut-off hole and the third fuel cut-off hole are formed in the delivery valve body, the fourth fuel cut-off hole is formed in the delivery valve seat, and therefore it is ensured that damage caused to core parts of an engine when fuel leaks and potential safety hazards are generated due to explosions are eliminated.

Description

technical field [0001] The invention relates to a unitary pump assembly of a single-cylinder fuel-cut high-speed diesel engine. Background technique [0002] At present, single-cylinder diesel engines are used to waste fuel due to pipeline failures between the fuel injection pump nozzle and the engine combustion chamber or failures such as low pressure in the engine combustion chamber due to sealing reasons, resulting in difficult combustion. After the engine works for a long time, the excess fuel in the body will damage the core components of the engine, and the fuel leaked from the outside will explode when it touches an open flame, posing a safety hazard. Contents of the invention [0003] The purpose of the present invention is to solve the shortcomings of the existing diesel engine that the core components of the diesel engine are easily damaged and there are huge safety hazards when the fuel pipeline or the closed combustion chamber fails, and provide a new type of s...

Claims

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Application Information

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IPC IPC(8): F02M59/46
Inventor 龙美彪欧阳玲湘黄民备罗山刚朱高军邓飞
Owner NANYUE FUEL INJECTION SYST CO LTD
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