| 摘要 |
PROBLEM TO BE SOLVED: To prevent the leakage of fuel from a fuel supply system for injecting no fuel and to reduce a torque chock when injected fuel is switched in an internal combustion engine using one selected from two types of fuel supply systems. SOLUTION: At the time of starting an engine, only a fuel supply system selected from two types of fuel supply systems 23 and 24 according a fuel switching request is actuated. Thus, for one fuel supply system injecting no fuel, an increase in a combustion pressure is prevented, and the leakage of fuel from a fuel injection valve or the like is prevented. Also, when a new fuel switching request is made while fuel is cut, injected fuel of all the cylinders of an engine 11 is simultaneously switched, but when a new fuel switching request is made at the time other than when fuel is cut, injected fuel is sequentially switched for respective cylinders, and thus a torque shock during fuel switching is reduced. In this case, fuel switching timing is adjusted for each cylinder according to the torque of the engine 11. |
