| 摘要 |
PCT No. PCT/GB91/01094 Sec. 371 Date Jan. 5, 1993 Sec. 102(e) Date Jan. 5, 1993 PCT Filed Jul. 4, 1991 PCT Pub. No. WO92/01144 PCT Pub. Date Jan. 23, 1992.A means of varying both the opening and closing angle of internal combustion engine valves by means of a mechanism which varies the instantaneous phase of the camshaft with respect to the phase of the crankshaft so causing the cam to spend a longer or shorter time than nominal in contact with the valve tappet in response to a chosen control programme. |
