| 摘要 |
In order to improve the economy of piston engines under partial load it is proposed to avoid the systematic part of the throttle losses during induction and exhaust by induction up to the required filling without throttling in the intake pipe and then closing the inlet valve and opening the exhaust valve in the event of over expansion only when the atmospheric pressure has been re-attained during return of the piston (fig. 1). In method 2 the inlet valve remains open until the excess filling is blown back out during return of the piston. For the control a mechanical solution is described in which the valve levers (3) are given a profiling (4), so that the desired phase control is achieved according to the position of the horizontally displaceable camshaft (2), and secondly an electronic control with actuating magnets for each valve, which also optimises the EO and AS control points. For method 2 a solution with 2 camshafts running out of phase is described with identical phase at full load. <IMAGE>
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