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A start-up control method and control system for an engine gas circuit

A control system and start-up control technology, applied in the directions of engine control, electrical control, combustion engine, etc., can solve problems such as difficulty in starting the engine, and achieve the effects of solving the difficulty in starting, overcoming the difficulty in starting, and good adaptability

Active Publication Date: 2022-06-07
四川华气动力有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the technical problem in the prior art that the engine is difficult to start when the gas group changes, and the purpose is to provide an engine gas circuit startup control method and its control system. The value will change, which is a change in quantity for the engine, and the change in quantity will be reflected in the change of gas pressure

Method used

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  • A start-up control method and control system for an engine gas circuit
  • A start-up control method and control system for an engine gas circuit
  • A start-up control method and control system for an engine gas circuit

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Embodiment example 2

[0040] Implementation case 2: if figure 1 As shown, the graphs under the starting pressure conditions of different gas heating values ​​are disclosed,

[0041]

[0042] For a certain combustible gas, its calorific value change is relatively stable in a certain period of time. When the gas calorific value of the feed gas is 5MJ / Nm3, the intake pressure required by the engine's mixer intake at this time is is, 4cmH2O;

[0043] When the gas calorific value of the feed gas is 10MJ / Nm3, the required inlet pressure at the inlet of the mixer of the engine is 2.85cmH2O;

[0044] When the gas calorific value of the feed gas is 20MJ / Nm3, the required inlet pressure at the inlet of the mixer of the engine is 1.5cmH2O;

[0045] When the gas calorific value of the feed gas is 40MJ / Nm3, the required intake pressure at the intake of the engine's mixer is 1cmH2O;

[0046] To sum up, it can be approximated that it is relatively stable in a certain period of time. The calorific value of t...

Embodiment example 3

[0047] Implementation case 3: A startup control system for an engine gas circuit, which in turn includes an air filter element that is concerned about air, a mixer that mixes air and gas, a supercharger and an engine that supercharge the mixture, and also includes startup adjustment. Control loop, start-up regulation The control loop includes a gas control actuator, a pressure sensor for detecting the inlet pressure of the mixer, and a control ECU. The ECU is used to input the start-up pressure of gases with different calorific values ​​and compare it with the inlet pressure. Gas control The actuator performs feedback adjustment on the intake pressure of the gas;

[0048] The control system executes the steps in any one of the above-mentioned start-up control methods for an engine gas circuit.

[0049] Working principle: The starting pressures of gases with different calorific values ​​are pre-stored in the control ECU. Secondly, the pressure sensor installed at the inlet of t...

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Abstract

The invention discloses a start-up control method and a control system for a gas circuit of an engine, belonging to the technical field of gas engines, comprising the following steps: the first step: storing the start-up pressures of gases with different calorific values ​​in the editable control system; the second step Step 1: Detect the gas inlet pressure value of the mixer, set a pressure detection piece at the inlet of the mixer and detect the pressure value at the inlet of the mixer and feed it back to the editable control system; Step 3: The editable control system will The feedback pressure value is compared with the starting pressure, and the inlet pressure of the feed gas is adjusted in feedback. The present invention compares the pressure value at the inlet of the mixer with the preset pressure value to form a periodic dynamic The feedback adjustment mechanism of the engine enables the gas engine to start smoothly, which solves the problems of complex gas composition and difficulty in starting after composition changes in the prior art, and has good adaptability to gas starting under different working conditions.

Description

technical field [0001] The invention belongs to the technical field of gas engines, and in particular relates to a start-up control method of an engine gas circuit and a control system thereof. Background technique [0002] With the progress of the economy and the development of society, gas, as a general term for gas fuel, can be burned to release heat for use by residents and industrial enterprises. There are many types of gas, mainly natural gas, artificial gas, liquefied petroleum gas, biogas, and coal-to-gas. Among them, the artificial gas supply after a substantial increase in 1990, due to its disadvantages such as high pollution and strong toxicity, is in a relatively low position. Slow growth stage; liquefied petroleum gas is affected by rising oil prices, and the supply remains stable; the price of natural gas with the same calorific value is 30%-50% cheaper than gasoline and diesel, and it has obvious economic benefits. Paying attention to environmental protection...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/14F02D41/00F02D19/02
CPCF02D41/0027F02D41/1439F02D41/1444F02D41/1473F02D19/022F02D19/027Y02T10/30
Inventor 周捍东
Owner 四川华气动力有限责任公司
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