GASOLINE ENGINE EXCESS AIR COEFFICIENT COMBUSTION CONTROL METHOD AND COMBUSTION CONTROL SYSTEM

摘要

Provided are a gasoline engine excess air coefficient combustion control method and a combustion control system. The gasoline engine excess air coefficient combustion control method comprises the steps of: monitoring an engine operation state; according to the operation state of the engine, determining a current load state of the engine, the load state of the engine being divided into: a partial load state, a heavy load state and a full load state; according to the current load state of the engine, choosing an appropriate combustion mode of the excess air coefficient. When the current load state of the engine is a partial load state, the engine adopts a lean combustion mode with an excess air coefficient of 1.6-2.0; when the current load state of the engine is a heavy load state, the engine adopts a combustion mode with an excess air coefficient of 1; and when the current load state of the engine is a full load state, the engine adopts a combustion mode with an excess air coefficient of 0.8~0.9.