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Compact injection device having two armatures

A technology of injection device and armature, applied in the directions of fuel injection device, charging system, machine/engine, etc., can solve the problems of large structure space and complex structure, and achieve the effect of simple cost, compact structure and cost reduction

Active Publication Date: 2012-06-20
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the structure is relatively complex and the device occupies a large construction space

Method used

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  • Compact injection device having two armatures
  • Compact injection device having two armatures
  • Compact injection device having two armatures

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] Refer to the following figure 1 and 2 A small engine 1 having an injection device according to a first embodiment of the present invention will be described in detail.

[0019] figure 1 The structure of the small engine 1 configured as a single-cylinder engine is schematically shown. The small engine 1 comprises a cylinder 3 , a piston 4 reciprocating inside it, a control unit 5 and an oil tank 6 . The fuel tank 6 is connected to the injection unit 2 via a fuel supply line 6a. A fuel return line 6b returns from the injection assembly 2 to the fuel tank 6 . as by figure 1 Schematically, the fuel tank 6 is arranged above the spray assembly 2 . The fuel thus flows via the fuel feed line 6a to the injection assembly 2 on the basis of gravity. The injection unit 2 is shown very schematically and comprises a fuel pump, a pressure regulator, an injector and an air conditioner, so that the injection unit 2 is constructed very compactly.

[0020] The small electric motor...

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PUM

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Abstract

The present invention relates to an injection device, comprising a fuel pump (20a), a pressure controller (20b), an injector (20c), and an air actuator (20d), characterized in that the fuel pump (20a), the pressure controller (20b), the injector (20c), and the air actuator (20d) are integral parts of an injection module (2), and the injection device further comprises exactly one actuator which simultaneously activates the fuel pump (20a) and the air actuator (20d), wherein the actuator comprises a coil (21), a first armature (22), and a second armature (23), and a first working gap (S1) is provided on the first armature (22) and a second working gap (S2) is provided on the second armature (23), and wherein a stationary seal (36) is disposed between the first armature (22) and the second armature (23) in order to seal a medium controlled by the first armature from a medium controlled by the second armature.

Description

technical field [0001] The invention relates to an injection system having a fuel pump, a pressure regulator, an injector and an air regulator in a compact design. Background technique [0002] Injection devices of various designs are known from the prior art. In particular, small internal combustion engines with only one or two cylinders and a small displacement volume require separate technical solutions for cost and structural reasons. Fields of application of such small internal combustion engines are, for example, two- or three-wheeled vehicles, or lawn mowers. Known injection devices generally include a fuel pump with a pressure regulator in the fuel tank, wherein the fuel pump delivers fuel at a certain pressure into a line, such as a "rail". At the end of the line there is an injector which is controlled by a control unit. Fuel is injected into the intake pipe or directly into the combustion chamber. However, such an injection system is so complex and particularl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M57/02F02M37/02F02M37/00
CPCF02M37/007F02M57/027
Inventor U·西贝尔W·莫伊雷尔H·朗
Owner ROBERT BOSCH GMBH