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Fuel injection system

A fuel injection system and fuel injection technology, applied in the direction of fuel injection devices, charging systems, combustion engines, etc., can solve the problem of large distance between fuel injection valve and spark plug, reduce temperature sudden change load, and improve ignition angle insensitivity Effect

Inactive Publication Date: 2006-07-05
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Flawed repeatability first manifested in the excessive emission of unburned hydrocarbons, which is caused by the various combustion interrupters
These characteristics lead to the above-mentioned two combustion methods also having other serious disadvantages: due to the large distance between the fuel injection valve and the spark plug, the small injection quantity no longer reaches the spark plug at the mixture concentration required for stable ignition

Method used

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Examples

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Embodiment Construction

[0029] 1 shows a schematic partial section through a longitudinal section of a hybrid compression internal combustion engine 1 having a cylinder head 2 on which a spark plug 3 and fuel injection valves 4 are arranged in corresponding recesses. Since the structure of spark plug 3 and fuel injector 4 is basically known, no further description of these components will be given.

[0030] The fuel injection valve 4 injects fuel in the form of a cone-shaped injection jet 5 into a combustion chamber 7 defined by the cylinder head 2, the piston 6, and cylinder walls (not shown). The combustion chamber 7 is partially formed by a combustion chamber recess 8 formed on the piston 6 .

[0031] Fuel injector 4 and spark plug 3 are arranged relative to each other in such a way that spark plug 3 protrudes into combustion chamber 7 offset laterally relative to fuel injector 4 , spark plug electrode 9 being in the region of injected oil jet 5 .

[0032] The shape of the injection jet 5 depends...

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Abstract

The invention relates to a fuel injection system for internal combustion engines, comprising, amongst other things, at least one fuel injection valve (4), which injects fuel into a combustion chamber (7), with a spark plug (3), extending into the combustion chamber (7). The fuel injection valve (4) comprises a valve body (10) which has several circumferential injection nozzles (11, 11d). The injection nozzles (11, 11d) are arranged such that a conical injection stream (5) is produced in the combustion chamber (7). At least those injection nozzles (11d) which are directly adjacent to the spark plug (3) comprise an oblong cross-section.

Description

technical field [0001] The invention relates to a fuel injection system of an internal combustion engine comprising at least one fuel injection valve which injects fuel into a combustion chamber which has a spark plug protruding into the combustion chamber. Background technique [0002] In hybrid compression forced ignition internal combustion engines with internal mixing, a "mixture mist" with a defined fuel-air ratio in the ignitable region is required for stratified charge operation in the region of the spark plug. For this purpose, fuel injection valves are used which have a nozzle which opens inwardly or outwardly and produces a conical oil jet. [0003] For example, DE 19804463 A1 discloses a fuel injection system for a hybrid compression forced ignition internal combustion engine, which has at least a fuel injection valve for injecting fuel into a combustion chamber formed by a piston / cylinder assembly and a spark plug protruding into the combustion chamber. The nozz...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M61/18F02B23/10F02B75/12F02M61/14
CPCF02M61/184F02B23/101F02B2023/103F02B2075/125F02M61/1826Y02T10/123Y02T10/12F02M61/00
Inventor 格诺特·维费尔
Owner ROBERT BOSCH GMBH
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