To inhibit resultant force of load acting on a camshaft caused by action of the internal combustion engine during a period in which compression ratio of the internal combustion engine is maintained from getting fixed, and inhibit shortage of oil film on the camshaft in a variable compression ratio internal combustion engine provided with a variable compression ratio mechanism capable of changing compression ratio by rotating the camshaft.
Magnitude of resultant force of energizing force Lp and self weight Lf is maintained larger than the minimum resultant cylinder pressure load LcminM at a time of the maximum load and smaller than the maximum resultant cylinder pressure load LcmaxF at a time of fuel cut by applying energizing force Lp making the cylinder block and a crank case closer by an energizing force generating mechanism.
COPYRIGHT: (C)2008,JPO&INPIT
Eiichi Kamiyama
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Mayuko Wakuda
Kazunobu Sera
Tsutomu Toyama
Takehiko Sekine