| 摘要 |
PURPOSE:To save fuel at the time of partial-load operation of a multi-cylinder engine compressor, by stopping pumping action of part of cylinders of a compressor, and at the same time stopping ignition of part of cylinders of the engine. CONSTITUTION:A multi-cylinder engine compressor comprises an engine 2, a compressor 3 and a control unit 4. At the time of full-load operation of the apparatus, a control circuit 7 does not give an ignition stopping instruction nor an operation cancelling instruction to any of cylinders 21-26, 31-36, so that all of the cylinders are operated at phase intervals of 120 deg.. At the time of half- load operation of the apparatus, on the other hand, the cycle time of one operation cycle of the cylinders 21-26 is made twice as long as that of one operation cycle at the time of full-load operation. While the apparatus operates 1,440 deg., ignition and pumping action are effected in a predetermined sequence by producing ignition stopping instruction and operation cancelling instruction. At the time of other partial-load operation, ignition and pumping action are effected in a predetermined sequence. Thus, it is enabled to save fuel for the cylinders of engine which are in rest state. |
