Unlock instant, AI-driven research and patent intelligence for your innovation.

Spill valves, high pressure pumps and fuel injection systems used in fuel injection systems

A technology of fuel injection system and overflow valve, which is applied in the direction of fuel injection pump, fuel injection device, charging system, etc., to achieve the effects of improving vibration damping, improving response characteristics and adjusting parameters.

Active Publication Date: 2021-06-01
ROBERT BOSCH GMBH
View PDF17 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it has been shown that the throttled flow out of it can flow back into the spring chamber in the opposite direction

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Spill valves, high pressure pumps and fuel injection systems used in fuel injection systems
  • Spill valves, high pressure pumps and fuel injection systems used in fuel injection systems
  • Spill valves, high pressure pumps and fuel injection systems used in fuel injection systems

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] according to figure 1 The fuel injection system of the present invention conveys fuel via a filter 1 from a fuel tank 2 by means of a fuel delivery pump 3 via a fuel line 4 to a high-pressure pump 5 , which is designed here as a radial piston pump.

[0025] Furthermore, the fuel injection system comprises a metering unit 6 and a high-pressure accumulator 7 , which is also referred to as a rail, which in turn is connected to injection valves (not shown further here) which inject fuel into the combustion chambers of the internal combustion engine middle.

[0026] The metering unit 6 is used to variably adjust the fuel supply quantity from the fuel delivery pump 3 to the high-pressure pump 5 as required. An overflow valve 8 is arranged in the feed line from the fuel delivery pump 3 to the metering unit 6 , which serves to drain off the fuel delivered in excess by the fuel delivery pump 3 in a controlled manner and via the return line 9 . Leading back into the fuel tank 2...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to an overflow valve, a high-pressure pump and a fuel injection system with a high-pressure pump (5) for generating injection pressure, the pump input pressure of which can be adjusted via an overflow valve (8), The overflow valve has a longitudinally displaceable piston unit (13) arranged in a valve housing (10) provided with an inlet connection (11) and a return connection (12), the piston unit being connected as a valve element to the return connection (12) cooperate and the piston unit is loaded on the rear by at least one valve spring (14), which is accommodated in a spring chamber (15) of the valve housing (10) and serves to generate a switching pressure, wherein , the spring chamber (15) is connected to means for removing fuel penetrating there, in order to generate gas bubbles in the spring chamber (15).

Description

technical field [0001] The invention relates to an overflow valve, in particular for use in a fuel injection system, and to a high-pressure pump, in particular for generating a fuel injection pressure, and a fuel injection system, wherein the overflow valve of the fuel injection system There is a piston unit which is arranged displaceably in a direction against the force of at least one valve spring in a valve housing provided with an inlet connection and a return connection. Background technique [0002] DE 10 2009 027 146 A1 discloses a high-pressure fuel pump with a low-pressure area on the suction side, in which an overflow valve is arranged, which has a valve housing, a piston unit as valve element, and A valve spring, the valve housing is fixed in the pump housing and has an inlet and one or more outlets. The valve element accommodated in the valve housing is displaceable in an axial direction parallel to the longitudinal axis of the overflow valve and is held by an a...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): F02M59/46F02M37/00F02M63/00
CPCF02M37/0029F02M59/46F02M63/004F16K15/044
Inventor H·艾泽勒M·法特达乔
Owner ROBERT BOSCH GMBH