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Compact injection device

A technology of injection device and injector, applied in the directions of fuel injection device, low pressure fuel injection, low pressure fuel injection, etc., can solve the problems of large structure space and complex structure, and achieve the effect of simple cost, compact structure and cost reduction

Inactive Publication Date: 2013-12-04
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the structure is relatively complex and the device occupies a large structural space

Method used

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  • Compact injection device
  • Compact injection device
  • Compact injection device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] Refer below figure 1 A small engine 1 with an inventive injection device according to a first embodiment will be described in detail.

[0028] figure 1 The structure of a small engine 1 is shown schematically, which is designed as a single-cylinder engine. The small engine 1 includes a cylinder 3 , a piston 4 movable back and forth in the cylinder, a control unit 5 and an oil tank 6 . The fuel tank 6 is connected to the injection module 2 via a fuel feed line 6a. A fuel return line 6 b returns from the injection module 2 to the fuel tank 6 . as from figure 1 It can be seen schematically that the oil tank 6 is arranged above the injection module 2 . In this way, the fuel flows through the fuel feed line 6 a to the injection module 2 based on gravity. The injection module 2 is shown very schematically and comprises a fuel pump, a pressure regulator, an injector and a volume regulator, so that the injection module 2 has a very compact design.

[0029] The small engi...

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PUM

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Abstract

The device (2) has a fuel pump (20a), a pressure regulator (20b), an injector (20c) and an air controller (20d) arranged on a common housing and formed as integral components of the injection device. An actuator simultaneously actuates the pump and the air controller and is designed as a magnetic actuator with a coil (21) and an armature (22). The armature is designed as plunger piston with two end regions, which are respectively assigned to the fuel pump and the air controller. The fuel pump comprises a membrane (26) that is connected with one of the end regions of the plunger piston.

Description

technical field [0001] The invention relates to a compact injection system having a fuel pump, a pressure regulator, an injector and a volume regulator. Background technique [0002] Injection devices are known in various designs from the prior art. Especially for reasons of cost and installation space, small internal combustion engines with only one or two cylinders and a small cylinder displacement require separate solutions. Fields of application of such small internal combustion engines are, for example, two- or three-wheeled vehicles or lawn mowers. Known injection devices generally comprise a fuel pump in the fuel tank with a pressure regulator, wherein the fuel pump delivers fuel at a predetermined pressure into a line, for example a rail or the like. An injector is arranged at the end of the pipeline, and the injector is controlled by the control device to inject fuel into the intake pipe or directly into the combustion chamber. However, such injection devices are...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M57/02F02M69/00F02M69/04F02M57/04
CPCY02T10/146F02M69/005F02M57/04F02M57/027F02M23/12F02M69/08F02M51/04F02M23/006F02M69/044Y02T10/12
Inventor H·施伦巴赫J·海泽C·拜尔H·施奈德U·西贝尔R·德蓬特
Owner ROBERT BOSCH GMBH