Internal combustion generating set fuel self-adaptive control system and control method thereof

Abstract

The invention relates to an internal combustion generating set fuel self-adaptive control system and a control method thereof, and belongs to the technical field of engine control. The system comprises an MCU, a parameter storage module, a CAN communication module, a power driver, a two-section current sampling module, a nozzle driver, a fuel adaptation manual switch, an oxygen sensor signal processing circuit, an oxygen sensor heating driver and an oxygen sensor. The internal combustion generating set fuel self-adaptive control system and the control method thereof have the beneficial effectsthat the fuel injection amount is automatically adjusted according to the difference of fuels of a generating set, adjustment of engine fuel components is achieved, the self-adaptability of the fuelcontrol system of the internal combustion generating set to different fuel types is improved, and the working reliability of the fuel system of the internal combustion generating set is ensured; and the technical scheme based on two-section current sampling is adopted for power driving, fuel injection actuator driving modes are freely switched according to different fuel injection actuator characteristic requirements, and injection actuator driving of engines of different hardware models and different powers can be achieved through one driving circuit.

Description

technical field [0001] The invention belongs to the technical field of engine control, and relates to a fuel self-adaptive control system of an internal combustion generator set and a control method thereof. Background technique [0002] With the increasing popularity of automobiles and the advancement of internal combustion engine technology, vehicle fuels are developing in diversification. Internal combustion engines are no longer limited to gasoline engines and diesel engines, and natural gas, methanol fuel and even mixed fuel engines have gradually become the focus of industry research. These types of engines are primarily based on petrol or diesel engine base models with re-matched fuel systems. [0003] Taking the engine used in gas-fired internal combustion generator sets as an example, the main component of natural gas is methane, and it also contains hydrocarbon gases such as ethane, propane, butane, and non-hydrocarbon gases such as nitrogen, CO22, and H2S. The me...

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Problems solved by technology

[0005] 1. The current control system is difficult to achieve precise control of the amount of fuel, and the actual air-fuel ratio often has a large deviation from the target value, which leads to deterioration of engine emissions and seriously affects the power and economy of the engine

[0006] 2. When the fuel composition changes greatly, it is difficult for the engine to start, and in many cases it is necessary to use an auxiliary method for the engine to run

[0007] 3. It is impossible to take into account different fuel types. Separate controllers need to be developed for different fuel types and re-calibrated for matching. The procurement cost of the system supplier is relatively high, and the development time of the system will also increase

[0008] 4. The parameters of the control system are difficult to adjust, and subsequent management and maintenance costs are relatively high

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