An in-line distribution type fully electronically controlled fuel injection pump assembly

Abstract

The invention discloses a fully electronically controlled in-line distributor type fuel injection pump assembly which comprises a pump body and a pump head arranged on the pump body, wherein a cam shaft is arranged in the pump body; a plunger is arranged in the pump head; a high-pressure oil chamber is arranged at the head part of the plunger; the cam shaft comprises a main shaft and a cam arranged on the main shaft; four bulges adopting the same structure are uniformly distributed on the cam; an included angle between the axes of every two bulges is 90 degrees; each bulge comprises a concave arc section, a working section, a transition section and a deceleration section; each adjacent bulge on the cam corresponds to one working cycle of the plunger; the plunger reciprocates up and sown four times as the cam shaft rotates once; and a high-pressure fuel distribution mechanism is arranged on the pump head. The fully electronically controlled in-line distributor type fuel injection pump assembly realizes timed and quantitative control of fuel injection quantity, solves the problem of poor consistency of fuel quantity of a conventional electronically controlled unit pump; and meanwhile the fully electronically controlled in-line distributor type fuel injection pump assembly solves the problem of low pressure at an end of a fully electronically controlled VE pump, and improves the combustion performance of an engine.

Description

technical field [0001] The invention relates to a fuel injection pump, in particular to an in-line distribution type full electric control fuel injection pump assembly. Background technique [0002] With the implementation of the national three-stage non-road diesel engine vehicle exhaust emission regulations, the requirements for limiting the content of NOx, HC and CO in diesel engine exhaust emissions are getting higher and higher. The fuel injection pump is one of the core components of the diesel engine fuel system. It is responsible for injecting high-pressure fuel into the cylinder of the diesel engine. The fuel injection pressure will directly determine the economic and performance indicators of the diesel engine. Practice has found that the traditional in-line synthetic multi-cylinder electronically controlled fuel injection pump assembly can no longer meet the requirements of modern diesel engines. In order to meet the needs of diesel engine emissions and combustion...

AI Technical Summary

Problems solved by technology

[0007] In order to avoid the shortcomings of the above-mentioned prior art, the present invention provides an in-line distribution type fully electronically controlled fuel injection pump assembly, which can realize timing and quantitative precise control of the fuel injection quantity, and solve the problem of At present, the electronically controlled unit pump has the problem of poor consistency of fuel volume, and at the same time, it solves the problem of low pressure at the pump end of the current fully electronically controlled fuel injection pump, and improves the performance of the fuel injection pump

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