| 摘要 |
PCT No. PCT/JP96/03795 Sec. 371 Date Jul. 16, 1998 Sec. 102(e) Date Jul. 16, 1998 PCT Filed Dec. 25, 1996 PCT Pub. No. WO97/26447 PCT Pub. Date Jul. 24, 1997A method and apparatus for controlling a valve mechanism of an engine, in which two stage control at engine start and during high-speed running simplifies a construction of the control apparatus, poor starting in high power engine is avoided at engine start and white smoke exhausted immediately after engine start is eliminated, while cylinder pressures due to high power are suppressed during high-speed running, the NOx exhaust gas produced is reduced because of combustion temperature decrease, and the compression pressure is decreased to reduce the loss of horsepower. A hydraulic intake valve operating angle varying device (12) is provided between the intake valve (11) of a valve mechanism (2) of the engine and a crosshead (9) so that the supply of pressurized oil to the valve mechanism is stopped at engine start, to decrease the lift and operating angle of the intake valve (11), to increase the effective compression ratio, and the pressurized oil is supplied to the valve mechanism during high-speed running, to increase the lift and operating angle of the intake valve (11), to decrease the effective compression ratio.
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