Direct injection gasoline-natural gas dual-fuel engine control system and control method

Abstract

The invention relates to the technical field of automobiles, in particular to a direct injection gasoline-natural gas dual-fuel engine control system and control method. The direct injection gasoline-natural gas dual-fuel engine control system comprises a natural gas supply system, an original direct injection gasoline engine electronic control system and further an electronic control unit (ECU),wherein the electronic control unit is correspondingly connected with the natural gas supply system and the original direct injection gasoline engine electronic control system. According to the directinjection gasoline-natural gas dual-fuel engine control system and control method, an original engine electric control system and the electronic control unit are adopted to jointly control the working process of a natural gas-gasoline double-fuel engine, the ECU of the engine can normally work, and meanwhile control of the electronic throttle valve is realized; and in addition, parameters such asignition energy, the natural gas injection amount, the gasoline injection amount of the dual-fuel engine can be accurately controlled through the electronic control unit, the cost is saved while theperformance requirement is met, and the maintenance difficulty is reduced.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a direct-injection gasoline-natural gas dual-fuel engine control system and control method. Background technique [0002] With the increasingly tense supply of petroleum energy and the deterioration of the atmospheric environment, the search for efficient and clean alternative fuels and combustion methods has attracted widespread attention from scholars at home and abroad. Natural gas is considered as one of the ideal alternative fuels because of its high calorific value, cleanness, abundant reserves, easy mixing with air, and high octane number. However, natural gas is gaseous at room temperature, and when it enters the engine cylinder, it will occupy the volume of the combustible mixture, reducing the volumetric efficiency of the engine. Moreover, natural gas fuel is a gaseous fuel with low energy density, and the flame propagation speed of natural gas is slow. Therefore, a...

AI Technical Summary

Problems solved by technology

Patent No. CN103016168A uses two control systems to achieve precise control, but relays are used for conversion, which increases the difficulty of control and maintenance and increases the cost

Images