Control method for blending combustion of diesel and natural gas
A control method and technology of natural gas, which is applied in the control field of blending diesel with natural gas, and can solve problems such as damage to automobile engines
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no. 1 example
[0067] The technical idea of the present invention is to add a throttle valve for controlling the supply of air. When the effective power of the engine is small, the air-fuel ratio inside the engine can be appropriately reduced through the throttle valve to make the natural gas easier to burn, thereby appropriately increasing the air-fuel ratio. Large NG blending ratio.
[0068] The control method of the diesel blended burning natural gas of the present invention comprises the following steps:
[0069] Step 100: adding a throttle valve for controlling the supply of air, and setting the effective power threshold of the engine;
[0070] In the present invention, the throttle valve is an existing electronic throttle valve, which is serially connected to the air intake channel and is used to block air from entering. The smaller the throttle valve opening, the less air enters the engine.
[0071] Here, the effective power threshold is a scale used to characterize whether the eng...
no. 2 example
[0110] The first embodiment assumes that the supply of diesel and natural gas can be controlled; but in fact, the supply of natural gas will not be effectively controlled when the engine load is large, that is, the first actual NG blending ratio is not accurate. Specifically, when the engine is under heavy load conditions, the time to increase the temperature in the engine cylinder by blending diesel with natural gas will be delayed, and the supply control of natural gas will be inaccurate, so that the actual air-fuel ratio of the cylinder measured by the engine control cannot make the engine The internal fuel is effectively utilized; the technical thinking of the second embodiment is: by measuring the oxygen content in the exhaust gas of the engine, and the relevant parameters of the engine cylinder, indirectly calculate the actual NG blending ratio inside the engine cylinder (this embodiment denoted as the second actual NG blending ratio), and the fuel supply is controlled a...
no. 3 example
[0197] Brown gas is obtained by electrolysis of water. Partially replacing air with Brown gas can improve the combustion process of fuel. The technical idea of the third embodiment is based on the first embodiment or the second embodiment, to partially or completely replace the air with Brown's gas to further increase the first ideal NG blending ratio. Here, in this embodiment, the first ideal NG blending ratio is increased to the second ideal NG blending ratio.
[0198] In this embodiment, a Brownian gas is generated by a Brownian gas generator. In the actual application of Brownian gas, it is found that the ratio of Brownian gas to air is very small.
[0199] Based on the second embodiment, step 100 also includes: setting the corresponding relationship between the second ideal NG blending ratio and the gas pedal opening of the engine and the rotational speed of the crankshaft; and setting the cylinder target air-fuel ratio and the gas pedal opening and The corresponding ...
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