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Method and device for identifying glowing ignition in gasoline engines

A gasoline engine, hot ignition technology, applied in the direction of engine ignition, ignition safety devices, engine components, etc., can solve problems such as gasoline engine damage, and achieve the effect of reducing application costs

Inactive Publication Date: 2017-10-13
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If the process is not interrupted, this hot ignition formation already leads to such high pressures and temperatures after a relatively small amount of combustion that the gasoline engine is directly damaged

Method used

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  • Method and device for identifying glowing ignition in gasoline engines
  • Method and device for identifying glowing ignition in gasoline engines

Examples

Experimental program
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Embodiment Construction

[0023] figure 1 A device for determining glowing ignition in an Otto engine 1 is shown. The gasoline engine 1, which is designed as a self-priming engine, has four cylinders 2, 3, 4, 5 in this example, the pistons of which are not shown further and move in the cylinders 2, 3, 4, 5 respectively The crankshaft 10 is connected via a connecting rod 6 , 7 , 8 , 9 and is driven due to pressure changes caused by combustion. The cylinders 2 , 3 , 4 , 5 are connected to a suction line 11 , which ends with a throttle plate 12 opposite the suction line 13 . Nozzles 14 for injecting fuel protrude into the intake manifold 13 , whereby a fuel-air mixture is formed. Alternatively, the Otto engine 1 , in particular a small engine, can be designed with direct injection, which injects fuel individually into each cylinder 2 , 3 , 4 , 5 by means of an injector. In a further variant, it is also possible to design a spray system variant comprising a straight spray device and a suction pipe spray...

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Abstract

The invention relates to a method for detecting glowing ignition in a gasoline engine, which occurs independently of ignition by a spark plug in a combustion chamber (1) of the gasoline engine. In a method for clearly distinguishing glowing ignition from sporadically occurring pre-ignition, the combustion chamber pressure (p) occurring before and / or after the point in time of ignition of the spark plug is analyzed for determining glowing ignition, wherein , the combustion chamber pressure (p) of a plurality of past combustions is observed in addition to the combustion chamber pressure (p) of a current combustion.

Description

technical field [0001] The invention relates to a method for detecting glowing ignition in a gasoline engine, which occurs independently of ignition by a spark plug in a combustion chamber of the gasoline engine, and a device for carrying out the method. Background technique [0002] In gasoline engines, the combustion of the supplied fuel-air mixture results in the vehicle being put into driving operation or maintained in driving operation. In the development of modern gasoline engines, there is a trend of downsizing gasoline engines combined with direct injection and supercharging. Downsizing here means that the technical dimensions of the Otto engine, for example its weight or stroke space, are reduced, but nevertheless achieve the same or similar performance as in larger Otto engines. This is possible because supercharging reduces the stroke space of a gasoline engine without reducing power levels. As a result, the Otto engine can be operated at higher loads in partial...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02P11/06
CPCF02D35/02F02D35/023F02D35/028
Inventor W·菲舍尔C·克卢特W·黑明罗立
Owner ROBERT BOSCH GMBH
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