| 摘要 |
PURPOSE:To reduce a shock at the time when the engine returns from a partial cylinders operation to the all cylinders operation, by opening the intake valve after reducing the pressure in the halted side cylinder by opening the opening valves of the atmospheric side opening passages except the fuel feeding passage at the halted side cylinder in such a return to the all cylinders operation. CONSTITUTION:A gas pressure leading passage 21 is furnished to link to a combustion chamber 3 of the halted side cylinder 1A with an intake and an exhaust valves 10 and 11 which are kept closed by the actions of actuators 12 and 13 respectively, in order to make it possible to introduce the gas pressure in a pressure adjusting tank 20 to the combustion chamber 3 in a partial cylinders operation. In such am composition, the gas pressure in the halted side cylinder 1A is increased and the compression pressure therein is made to approach the combustion pressure of the operating side cylinder 1B. And when the returning time from the partial to the all cylinders operation is detected, the exhaust valve (that is, the opening valves of the atmospheric side except the halted side intake passage 4a being a fuel feeding passage) is opened before the intake valve 10 is opened, to reduce the pressure in the halted side cylinder 1A. |
