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A method and system for improving the robustness of a natural gas engine

An engine and robust technology, applied in engine components, engine control, machine/engine, etc., can solve problems such as combustion deterioration, engine power torque reduction, affecting engine consistency, etc., to improve robustness and improve robustness sexual effect

Active Publication Date: 2022-04-05
WEICHAI POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The national six-stage natural gas engine adopts the equivalent ratio + EGR + TWC technology route, the power of the engine directly depends on the intake air volume, and the combustion state in the cylinder has a significant impact on the engine performance; in seasons with high temperature and humidity, with the increase of temperature and humidity , the air density decreases, the actual amount of oxygen entering the engine is small, and too much moisture causes combustion deterioration, engine power torque decreases, and affects the consistency of the engine

Method used

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  • A method and system for improving the robustness of a natural gas engine
  • A method and system for improving the robustness of a natural gas engine
  • A method and system for improving the robustness of a natural gas engine

Examples

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Embodiment 1

[0048] Such as figure 1 and figure 2 As shown, a method for improving the robustness of a natural gas engine includes the following steps:

[0049] Step S0, judging whether the temperature and humidity sensor is valid, the temperature and humidity sensor is set between the air filter and the inlet of the supercharger; the temperature and humidity sensor is used to detect the intake air temperature and humidity, and the validity of the temperature sensor is judged when the car is parked When using other temperature and humidity sensors on the vehicle to detect the ambient temperature and humidity, compare it with the temperature and humidity detected by this temperature and humidity sensor. Detection effectiveness, this step is used to ensure the accuracy of subsequent detection.

[0050] Step S1, if it is valid, then judge whether the engine is running normally; whether the engine is running normally is by detecting the fault signal, if there is a fault signal, it indicates...

Embodiment 2

[0081] Such as image 3 As shown, a system for improving the robustness of a natural gas engine includes an electronic control unit and an operating state detection unit electrically connected to the electronic control unit, an EGR rate detection unit and a correction unit, wherein the operating state detection unit is used to judge whether the engine is Normal operation; the EGR rate detection unit is used to obtain the engine speed and intake pressure, and look up the EGR rate map table according to the engine speed and intake pressure, check the EGR rate, and then judge whether the EGR rate is greater than zero; the correction unit is in the EGR When the EGR rate is zero, the throttle opening is corrected. When the EGR rate is greater than zero, the supercharging pressure, the basic EGR rate and the ignition advance angle are corrected to make the engine run normally.

[0082] The system also includes a preset unit electrically connected to the electronic control unit. The ...

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Abstract

The invention discloses a method and system for improving the robustness of a natural gas engine, and relates to the field of engines. The method includes the following steps: judging whether the engine is running normally; if it is, obtaining the engine speed and intake pressure; searching according to the engine speed and intake pressure Check the EGR rate map table, check the EGR rate; judge whether the EGR rate is greater than zero; if not, correct the throttle opening; if yes, correct the supercharging pressure, correct the base EGR rate and correct the ignition advance angle. It can be seen that the present invention monitors the intake air in real time through the temperature and humidity sensor, obtains the EGR rate through the intake air pressure, corrects the throttle opening according to the EGR rate, corrects the gain pressure, corrects the basic EGR rate and / or corrects the ignition advance angle, so that the engine power The torque meets the demand and the engine runs normally, which increases the robustness of the engine.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to a method and system for improving the robustness of natural gas engines. Background technique [0002] The national six-stage natural gas engine adopts the equivalent ratio + EGR + TWC technology route, the power of the engine directly depends on the intake air volume, and the combustion state in the cylinder has a significant impact on the engine performance; in seasons with high temperature and humidity, with the increase of temperature and humidity , the air density is reduced, the actual amount of oxygen entering the engine is small, and too much moisture causes combustion to deteriorate, the engine power torque is reduced, and the consistency of the engine is affected. Contents of the invention [0003] In view of the above deficiencies, the technical problem to be solved by the present invention is to provide a method and system for improving the robustness of a natural g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/00F02M26/49F02P5/145F02B77/08
CPCF02D41/005F02D41/0072F02M26/49F02B77/08F02P5/145F02M2026/009
Inventor 赵令辉潘永传韩雨李哲
Owner WEICHAI POWER CO LTD