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Pump, in particular a high-pressure fuel pump

A high-pressure pump, fuel technology, applied in the direction of fuel injection pumps, fuel injection devices, liquid fuel engines, etc., can solve wear, contain particles, which may then also reach between the support element and the push rod body, can no longer guarantee Lubrication of supporting components and other issues to achieve the effect of reducing wear

Inactive Publication Date: 2013-03-06
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the plunger body and / or the receiver or other parts of the pump or internal combustion engine are worn, particles may be contained in the lubricant, which may then also get between the support element and the push rod body and may cause more serious damage there wear and tear
When the flow cross-section of the discharge line in the plunger body is small, there is the risk that this flow cross-section can be clogged with particles, so that sufficient lubrication of the support element can no longer be ensured

Method used

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  • Pump, in particular a high-pressure fuel pump
  • Pump, in particular a high-pressure fuel pump
  • Pump, in particular a high-pressure fuel pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0009] Figures 1 to 3 A pump is shown, in particular a high-pressure fuel pump for a fuel injection system for an internal combustion engine. The pump has at least one pump element 10 which in turn has a pump piston 12 which is driven at least indirectly by a drive shaft 14 to reciprocate linearly in a direction at least approximately radial to the axis of rotation 15 of the drive shaft 14 sports. The drive shaft 14 can be part of the pump, or alternatively it can also be provided that the pump has no drive shaft of its own and the drive shaft 14 is part of the internal combustion engine. The drive shaft 14 can here be, for example, a shaft of an internal combustion engine via which a gas exchange valve of the internal combustion engine is also actuated. The drive shaft 14 can have a cam 16 or an eccentric for driving the pump piston 12 .

[0010] The pump piston 12 is guided sealingly in a cylinder bore 20 of a housing part 22 of the pump. The pump piston 12 delimits a p...

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Abstract

The pump comprises at least one pump element which has a pump piston that is at least indirectly driven in a stroke movement by a drive shaft. A plunger having a plunger body is arranged between the drive shaft and the pump piston and is movably guided in a receiving device in the direction of the stroke movement of the pump piston and is supported on the drive shaft by means of a support element. Lubricant is supplied to the receiving device via a supply line and lubricant is conducted out of the receiving device via a discharge line into the plunger body to the support element. An annular gap filter is provided between the plunger body and the receiving device and is arranged between the supply line for supplying lubricant to the receiving device and the discharge line for discharging lubricant into the plunger body.

Description

technical field [0001] The invention relates to a pump, in particular a high-pressure fuel pump, according to the preamble of claim 1 . Background technique [0002] Such a pump in the form of a high-pressure fuel pump is known from DE 10115168 C1. The pump comprises at least one pump element having a pump piston driven in reciprocating linear motion at least indirectly via a drive shaft. Between the drive shaft and the pump piston there is a push rod with a push rod body which is displaceably guided in the receptacle in the direction of the reciprocating linear motion of the pump piston and supported by a support element in the form of a roller on the drive shaft. Lubricant is fed via an inlet line into the receptacle for the plunger body and lubricant is guided from the receptacle via the outlet line toward the support element into the plunger body in order to ensure lubrication between the support element and the plunger body. When the plunger body and / or the receiver ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M59/10F02M59/44F02M63/00
CPCF04B53/20H05K999/99F04B1/0408F02M63/0001F01B23/00F02M59/102F04B53/18F02M59/44F04B1/0426F02M59/10F02M63/00
Inventor E·迈尔M·舍特尔
Owner ROBERT BOSCH GMBH
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