| 摘要 |
<p>PCT No. PCT/CH89/00186 Sec. 371 Date Jul. 18, 1990 Sec. 102(e) Date Jul. 18, 1990 PCT Filed Oct. 20, 1989 PCT Pub. No. WO90/05842 PCT Pub. Date May 31, 1990.A multivalve internal combustion engine uses multiple inlet ports (2,3), each having a separate throttle (6), a fuel injection (7) and an intake valve (5). The individual inlet ports are positioned in such a way that they join the cylinderhead essentially in the same circumferential direction, thereby achieving a continuous unidirectional whirl in the cylinder at all engine speeds and loads. At low engine speeds, only one inlet port is opened; further inlet ports are opened progressively. The diameter of the inlet ports differ in size, whereby the first opened inlet port generates the fastest gas speed and the subsequent inlet ports generate successively slower gas speeds. Achieving an uninterrupted continuous strong whirl turbulence in the cylinder throughout the engine speed range, results in overall higher maximum power output, a clean fast burn and optimum torque characteristics using variable gas column adjustments.</p> |
