Method for controlling initial temperature of gas in first firing cycle cylinder of engine

An engine cylinder and engine technology, which is applied in the direction of engine ignition, engine components, engine control, etc., can solve the problems of difficult precise control of cylinder gas temperature, reduced engine test efficiency, and rise in air temperature, so as to shorten the time of backtracking and reduce fuel consumption. Consumption, fast heating effect

Active Publication Date: 2021-02-19
TIANJIN UNIV
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Problems solved by technology

[0003] Utilizing this gas heating method of temperature control results in a slower rise in the temperature of the air in the combustion chamber, especially at lower ambient temperatures, requiring the engine to run longer in reverse to reach the desired air temperature
This will not only reduce the efficiency of engine testing, but also make it difficult to precisely control the gas temperature in the cylinder

Method used

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  • Method for controlling initial temperature of gas in first firing cycle cylinder of engine
  • Method for controlling initial temperature of gas in first firing cycle cylinder of engine

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Embodiment Construction

[0022] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0023] combine Figure 1-2 , to specifically describe the embodiments of the present invention.

[0024] A method for quickly controlling the initial temperature of the gas in the cylinder of the first ignition cycle of the engine. The gasoline injection control system includes: gasoline tank 1, gasoline pump 2, gasoline fuel rail 3, crankshaft position sensor 17, camshaft position sensor 7, exhaust The temperature sensor 19, the exhaust oxygen sensor 20 and the electronic control unit 22; the gasoline fuel rail 3 and the gasoline injector 4 are installed on the engine intake pipe 5, and the spark plug 14 is installed in the engine cylinder. All sensors, gasoline injector 4, and gas...

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Abstract

The invention discloses a method for controlling the initial temperature of gas in a first firing cycle air cylinder of an engine. According to the method, a heating process is controlled by using anengine electronic control unit, mixed gas in the air cylinder is ignited by using sparks to heat a combustion chamber by adjusting the mass of gasoline injected into an air inlet pipe and the amount of air on the condition that the opening degree of a throttle valve meets test requirements, the temperature of residual waste gas in the air cylinder and thethermodynamic state in the combustion chamber are calculated according to a temperature sensor installed in an exhaust passage, and after the set temperature of the residual waste gas in the air cylinder and the set thermodynamic state are achieved, the electronic control unit is automatically switched to an engine combustion process test control mode with the set temperature of the gas in the air cylinder.

Description

technical field [0001] The invention relates to the technical field of initial gas temperature control and combustion in an engine, in particular to a method for controlling the initial temperature of gas in an engine combustion chamber. Background technique [0002] The gas temperature in the cylinder before the engine fires for the first time is an important factor affecting the formation and combustion of the combustible mixture. At present, most of the methods for controlling the temperature of the gas in the cylinder are to use the intake heater, such as the disclosed patents CN110296026A and CN209129761U, etc., the implementation of which is to calculate the heating time of the electric heater according to the gas temperature requirements in the engine gas, through Controlling the air temperature in the intake pipe indirectly controls the gas temperature in the cylinder. [0003] Utilizing this gas heating method of temperature control results in a slower rise in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/40F02P5/15F02D37/02F02D41/30F02D41/00F02D41/24F02D41/06
CPCF02D41/40F02P5/1506F02D37/02F02D41/3082F02D41/009F02D41/2422F02D41/2496F02D41/3076F02D41/064
Inventor 何邦全李晓赵华
Owner TIANJIN UNIV
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