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Engine ultra-high compression ratio combustion control device and method based on jet ignition

A technology of engine and compression ratio, which is applied in the direction of engine control, engine operation, engine components, etc., can solve the problems of reducing flame propagation speed and stability, and achieve the effects of lowering temperature, easy modification, and low NOx

Active Publication Date: 2018-04-20
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

However, since the introduction of EGR will reduce the flame propagation speed and stability, this ratio is generally about 10% in practical applications

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  • Engine ultra-high compression ratio combustion control device and method based on jet ignition

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Embodiment Construction

[0039] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0040] The present invention provides an engine ultra-high compression ratio combustion control scheme based on spark plug pre-chamber jet ignition, which utilizes hydrogen doping, large EGR, supercharger and is equipped with spark plug pre-chamber, and finally obtains ultra-high engine thermal efficiency.

[0041] The spark plug pre-chamber can greatly increase the combustion rate and improve combustion stability. It is by installing a portable pre-chamber with a volume of only 1-2ml at the front of the ignition engine spark plug. The spark plug pre-chamber is connected to the combustion chamber with multiple nozzle holes. The thread size of the spark plug pre-chamber connected to the combustion chamber is the same as The spark plugs are the same, so they can be installed directly, no modification of the engine is required, and the cost is extremely low. ...

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Abstract

The invention discloses an engine ultra-high compression ratio combustion control method and device based on jet ignition of a spark plug pre-combustion chamber. The engine ultra-high compression ratio combustion control method comprises the steps that a spark plug of a spark-ignition engine is connected with a combustion chamber through the spark plug pre-combustion chamber; and according to thesize of the thermal load of the engine, hydrogen is mixed into an air inlet channel under the small load condition, and under the large load condition, the hydrogen is mixed into the air inlet channel, and meanwhile, an EGR system is used for conducting exhaust gas recirculation treatment. By using the engine ultra-high compression ratio combustion control method and device based on jet ignition of the spark plug pre-combustion chamber, knocking combustion can be inhibited, the ultra-high compression ratio is achieved, and the thermal efficiency is high.

Description

technical field [0001] The invention relates to the technical field of engine combustion control, in particular to an engine ultra-high compression ratio combustion control device and method based on spark plug pre-chamber jet ignition. Background technique [0002] According to the work theory of the engine thermodynamic cycle, the higher the compression ratio, the higher the possible thermal efficiency, which is why the thermal efficiency of diesel engines is generally much higher than that of gasoline engines. The compression ratio of the gasoline engine currently on the market is about 10-12, and its effective thermal efficiency is generally about 35%. Therefore, it is necessary to further increase the compression ratio to achieve the purpose of energy efficient utilization. [0003] However, for spark-ignition engines, including gasoline engines and other gaseous fuel engines, the biggest difficulty in improving thermal efficiency is the knocking combustion problem cau...

Claims

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Application Information

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IPC IPC(8): F02B47/04F02B47/08F02B19/12F02M25/10F02D43/00
CPCF02B19/12F02B47/04F02B47/08F02D37/02F02D41/0007F02D41/0025F02D41/005F02D41/36F02M25/10Y02T10/12
Inventor 吴晗李佳峰刘福水赵振峰孙柏刚岑春泽孙谦博王利利
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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