ENGINE, NUMBER OF CYLINDER THEREOF IS CONTROLLED

摘要

PURPOSE:To prevent the temperature drop of a specific cylinder, and to obviate the abrasion of a piston while improving combustion in case of the restart of cylinders stopped by stopping each cylinder in approximately the same probability when controlling the number of cylinders. CONSTITUTION:The fuel injection valves 3a-3d of respective cylinder 5a-5d are controlled separately in response to injection timing signals 2a-2d from a control circuit 1. Injection timing signals 7a-7d are inputted to the AND gates 14a-14d of the control circuit 1, and load signals 11 are inputted to one terminals of OR gates 15a, 15b and cylinder select signals 12 to the other terminals through an inverter 16. The load signals 11 are at ''H'' when the load of the engine is high and at ''L'' when the load is low, and the cylinder select signals 12 are signals in which H and L are repeated with the revolution of a crank. Accordingly, the cylinders to be stopped are not limited in specific ones.