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Internal combustion engine with a fuel supply system

A technology for fuel delivery and internal combustion engines, applied in fuel injection devices, liquid fuel feeders, low pressure fuel injection, etc., to solve problems such as pressure fluctuations that cannot be reliably achieved, achieve simple design solutions, avoid bubble accumulation, manufacturing tolerances simple effect

Inactive Publication Date: 2013-06-26
ANDREAS STIHL AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Sufficient damping of pressure fluctuations cannot thus be reliably achieved

Method used

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  • Internal combustion engine with a fuel supply system
  • Internal combustion engine with a fuel supply system
  • Internal combustion engine with a fuel supply system

Examples

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Embodiment Construction

[0027] FIG. 1 shows a cutting machine 1 as an exemplary embodiment for a power tool, in particular for a hand-held portable power tool. However, the internal combustion engine according to the invention with the fuel delivery device can also be configured for other power tools, such as motor saws, trimmers, blowers or the like.

[0028] The cutter 1 has a housing 2 to which a forwardly protruding bracket 3 is fastened. A cutting disk 4 is rotatably mounted at the free end of the carrier 3 , which is driven in rotation by an internal combustion engine 12 arranged in the housing 2 . The cutting disk 4 is covered by a protective cover 5 over more than half of its circumference. The housing 2 includes a housing 8 on which an upper handle (Handgriff) 6 is formed. An accelerator lever 10 and an accelerator lever lock 11 are pivotably mounted on the upper handle 6 . An air filter cover 9 is attached to the rear side of the housing 2 facing away from the cutting disk 4 . On the si...

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PUM

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Abstract

An internal combustion engine has a fuel supply device, wherein the fuel supply device includes a fuel pump, a fuel pressure damper, an injection valve, and a fuel pressure regulator. The fuel pressure damper has a damper membrane separating a damper chamber and a damper back chamber from each other. The damper chamber of the fuel pressure damper is loaded with a first reference pressure. The fuel pressure regulator regulates a pressure of fuel supplied by the fuel pump to the injection valve based on a second reference pressure of the fuel pressure regulator. The first reference pressure and the second reference pressure are adjusted relative to each other.

Description

technical field [0001] The invention relates to an internal combustion engine with a fuel delivery device (Kraftstoffzuführeinrichtung), wherein the fuel delivery device has a fuel pump, a pressure damper and an injection valve, wherein the pressure damper has a damping membrane that connects the damping chamber to the back chamber phase separation, wherein the back chamber of the pressure damper is loaded with a first reference pressure. Background technique [0002] A fuel pump for a two-stroke engine is known from DE 42 23 756 A1, downstream of which a pressure damper is located. The pressure damper has a spring-loaded membrane. The side of the damping membrane facing away from the fuel is acted upon by ambient pressure. The position of the damping diaphragm depends on the fuel pressure. Firstly, at lower fuel pressures, which are in the order of magnitude of the ambient pressure (Umgebungsdruck), fluctuations in the fuel pressure can lead to excessive deflection (Ausl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M55/02F02M37/04
CPCF02M37/0023F02M37/007F02M37/16F02M1/16F02M69/54
Inventor W.莱赫尔C.托斯特M.里贝尔A.基嫩M.迪滕贝尔格
Owner ANDREAS STIHL AG & CO KG