Combustion mode control system of gasoline premixing and diesel igniting engine and control policy thereof

Abstract

The invention discloses a combustion mode control system of a gasoline premixing and diesel igniting engine and a control policy thereof. After an electronic control unit acquires the cooling water temperature, the air inlet temperature, the air flow, the engine crankshaft rotating speed and the accelerator pedal position information to judge the operating conditions of the engine, action commands are sent to a gasoline injector and a diesel injector to control the combustion mode of the engine; the operation steps are as follows: (a) the automobile operation state is judged; and the corresponding engine combustion mode is selected; (b) the engine load state is judged, and the corresponding engine combustion mode is selected; and (c) when the engine is positioned in the working condition of medium load, the engine combustion mode is selected. The dynamic performance and the economic performance of automobiles are guaranteed; and the nitric oxide and PM discharge indexes are reduced.

Description

Technical field [0001] The invention relates to an engine combustion mode control system and control strategy, in particular to a gasoline premixing and diesel pilot combustion engine combustion mode control system and control strategy, belonging to the technical field of internal combustion engines. Background technique [0002] With the development of the automobile industry, people pay more attention to the emission performance and economic performance of automobiles. In order to meet the increasingly stringent emission regulations, most of the current automobile engines use "exhaust gas purification equipment" to process emissions, so "exhaust gas purification equipment" The function of the engine is constantly being improved, and its structure is becoming more and more complicated. In particular, it needs to consume a lot of precious metals, resulting in a price of about 40-90% of the original engine cost, which greatly increases the manufacturing cost of the vehicle. [0003]...

AI Technical Summary

Problems solved by technology

Although the technical solution of this patent application can effectively reduce fuel consumption and reduce the emission of harmful substances, in the technical solution of this patent application, when the engine is in a medium load condition, only "gasoline premixing, diesel ignition" is set. A dual-fuel mixed combustion mode, but under medium load conditions, if the HCCI combustion mode is adopted, the engine thermal efficiency and emission indicators are lower, which affects the full play of the engine's energy-saving and emission-reduction effects

Images