High pressure fuel pump driving structure

A driving structure and fuel pump technology, applied in liquid fuel engines, pumps, pump components, etc., can solve the problems of reducing the noise reduction effect of helical gears, frequent axial movement, shortening life, etc. Simple installation and easy disassembly

Active Publication Date: 2013-08-28
ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the timing system adopts helical gears, compared with spur gears, the helical gears suffer from greater axial component force, so the elimination of axial force and displacement compensation become the primary issues to be considered in the design, and if still If the connection of the cross slider is used, the influence of the axial force is more significant when the engine is

Method used

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  • High pressure fuel pump driving structure
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Embodiment Construction

[0031] Next, specific embodiments of the present invention will be further described in detail with reference to the accompanying drawings.

[0032] to combine Figure 1 to Figure 3 , the high-pressure fuel pump 2 is installed on the cylinder 1 through the flange 3, the flange 3 has a shaft hole 31, the pump shaft 21 of the high-pressure fuel pump 2 passes through the shaft hole 31 and extends into the sprocket chamber of the engine (unmarked), The timing gear train is housed in the sprocket chamber. In the sprocket chamber, the casing 4 is set on the pump shaft 21 and fastened by the nut 6 to realize the fixed installation of the casing 4 and the pump shaft 21 . Those of ordinary skill in the art can easily imagine that the sleeve 4 can also be fitted on the pump shaft 21 through an interference fit, but from the perspective of easy disassembly and assembly, it is obviously more advantageous to use a nut. The sleeve 4 has external splines, the helical gear 5 has internal sp...

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Abstract

The invention provides a high pressure fuel pump driving structure of an engine. The high pressure fuel pump driving structure comprises a spiral gear with an internal spline, a casing pipe with an external spline, a sliding sleeve, and a fixing sleeve. The casing pipe is fixedly installed on a pump shaft of a high pressure fuel pump, and the external spline of the casing pipe is in clearance fit with the internal spline of the spiral gear so that the spiral gear can slide relative to the casing pipe in the axial direction. The sliding sleeve and the fixing sleeve are sleeved together coaxially and can slide relatively axially. One end of the sliding sleeve abuts against the spiral gear. A pre-pressing spring is arranged between the sliding sleeve and the fixing sleeve. The high pressure fuel pump driving structure can effectively bear and avoid axial force generated when the spiral gear is adopted for driving the high pressure fuel pump, and therefore the spiral gear is applicable to the high pressure fuel pump and can lower noise of the engine.

Description

technical field [0001] The invention relates to the field of engines, in particular to a driving structure of a high-pressure fuel pump driven by a helical gear. Background technique [0002] Engines are widely used in various technical fields, especially in the automotive field. With the increasingly stringent emission regulations at home and abroad, high-pressure common rail fuel systems are widely used in vehicle diesel engines. The high pressure fuel pump is driven by timing system gears or sprockets, belt. In recent years, in order to effectively reduce the noise of the engine, there has been a trend of changing the timing system of the engine from the original spur gear to the helical gear drive. In the Chinese invention patent application for "diesel engine oil pump transmission system", helical gears are used in the timing system. [0003] Since the pump shaft of the high-pressure fuel pump generally cannot bear the axial force, it is necessary to offset or compen...

Claims

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Application Information

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IPC IPC(8): F02M37/06
CPCF02M39/02F04C2/344F04C15/0061
Inventor 胡志胜靳素华钱多德胡必谦孟祥山祖炳峰徐玉梁徐勋郑久林
Owner ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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