| 摘要 |
PROBLEM TO BE SOLVED: To obtain a sufficient negative pressure while suppressing deterioration in fuel consumption when a negative pressure for obtaining braking force is required although power from an internal combustion engine is not required during deceleration-running or the like. SOLUTION: When the power from the engine is not required but the negative pressure of a brake booster generated by the negative pressure of an engine intake system becomes insufficient, the engine alternately executes the first-third cylinders combustion cycle (410) and the second-fourth cylinders combustion cycle (420) at every 720°crank angles, wherein the first-third cylinders combustion cycle (S410) injects fuel to the first and third cylinders and does not inject the fuel to the second and fourth cylinders, and the second-fourth cylinders combustion cycle (S420) does not inject the fuel to the first and third cylinders but injects the fuel to the second-fourth cylinders. As a result, a sufficient negative pressure can be obtained in consideration of fuel consumption to thereby apply sufficient braking force. COPYRIGHT: (C)2007,JPO&INPIT |
