Air inlet compensation control method for high-power diesel engine in plateau environment

A high-power diesel engine, compensation control technology, applied in the direction of fuel air intake, mechanical equipment, combustion engine, etc., can solve the problems of diesel engine oil and gas matching imbalance, increased fuel consumption rate and smoke level, and inability to accurately control, etc. The effect of optimizing oil and gas matching, preventing insufficient boost pressure, and fast dynamic control compensation

Pending Publication Date: 2022-07-12
HENAN DIESEL ENGINE IND
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Problems solved by technology

However, this method cannot achieve precise control according to the real-time working conditions of the diesel engine. If the intake air volume is too large or too small, the oil-gas matching of the diesel engine will be unbalanced, resulting in an increase in fuel consumption and smoke.

Method used

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  • Air inlet compensation control method for high-power diesel engine in plateau environment

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Effect test

Embodiment 1

[0020] A high-power diesel engine intake compensation control method in a plateau environment according to the present invention, its specific steps are as follows:

[0021] Pre-calibration: Pre-calibrate and store the fuel injection pump rack displacement signal and diesel engine torque curve, torque and intake boost pressure curve in the controller on the diesel engine standard test bench;

[0022] Step1: The side control system monitors the diesel engine speed signal and the fuel injection pump rack displacement signal in real time to confirm whether the diesel engine is running;

[0023] Step2: If it is detected that the above-mentioned diesel engine speed signal and fuel injection pump rack displacement signal are not 0, the controller judges that the diesel engine is in a running state, and queries the pre-calibrated fuel injection pump rack displacement signal and diesel engine torque curve in the controller to obtain the current Real-time output torque of diesel engine...

Embodiment 2

[0028] The difference from Embodiment 1 is that the opening of the electronically controlled outlet valve can be pre-calibrated in the controller, and the controller outputs the control displacement after calculating the difference between the actual intake pressure and the target intake boost pressure. When the actual intake pressure rises to the target range, the controller outputs a control closing signal to the high-pressure gas cylinder electronically controlled gas outlet valve, and controls the high-pressure gas cylinder’s electronically controlled gas outlet valve to close. , the control is more precise and rapid.

[0029] Circuit control methods not described in detail herein are in the prior art.

[0030] The invention not only solves the problem of diesel engine intake air supply in the plateau environment, but also monitors real-time intake pressure parameters based on the real-time working torque of the diesel engine to determine whether it is within the target in...

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Abstract

The invention relates to an air inlet compensation control method for a high-power diesel engine in a plateau environment. According to the technical scheme, the method comprises the steps that air inlet compensation control is carried out, and pre-calibration and storage are carried out on an oil injection pump rack displacement signal and diesel engine torque curve and a torque and air inlet supercharging pressure curve on a standard test bed; and based on the real-time working torque and the real-time air inlet supercharging pressure of the diesel engine, a pre-calibrated torque and air inlet supercharging pressure curve is read, and whether the torque and air inlet supercharging pressure curve is within the target air inlet supercharging pressure range or not is judged. The method has the beneficial effects that the problem of air intake and air supply of the diesel engine in the plateau environment is solved, and whether the real-time air intake pressure parameter is within the target air intake supercharging pressure range is judged based on the real-time working torque of the diesel engine, so that accurate and rapid dynamic control compensation of the air intake pressure is realized, the problem of insufficient supercharging pressure is prevented, and the service life of the diesel engine is prolonged. And diesel engine oil-gas matching in the plateau environment is optimized.

Description

technical field [0001] The invention belongs to the technical field of diesel engine control, and relates to a high-power diesel engine intake compensation control method in a plateau environment. Background technique [0002] A V-type high-power diesel engine was originally designed for use as a marine diesel engine. The working altitude is at sea level. The intake air volume of the matched pressurized air intake system can adapt to the normal operation of the diesel engine. According to the working conditions of a certain user, the diesel engine needs to be refitted for use in a plateau environment above 3000m above sea level, and the oxygen content of the atmosphere is only about 70% of that of the plain. Under the condition that the power of the diesel engine remains unchanged, the original matching air intake system can no longer be used. meet work needs. The conventional method is to use an external compressed gas cylinder to supplement the air, and to supplement the ...

Claims

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Application Information

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IPC IPC(8): F02B39/00F02M35/10
CPCF02B39/00F02M35/10026F02M35/10065Y02T10/40
Inventor 赵文圣程德斌刘文斌徐进梁国欣王欢张金生
Owner HENAN DIESEL ENGINE IND
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