| 摘要 |
PCT No. PCT/FR94/01348 Sec. 371 Date May 6, 1996 Sec. 102(e) Date May 6, 1996 PCT Filed Nov. 18, 1994 PCT Pub. No. WO95/14853 PCT Pub. Date Jun. 1, 1995A method wherein a number of cylinders (2, 3; 1, 4) are grouped on a same exhaust gas manifold (8, 10) such that the pressure in the exhaust pipe (1e . . . 4e) undergoes time-dependent fluctuations of substantial amplitudes, and the exhaust valve (6) of a cylinder (1) is opened during induction or filling thereof (i.e. adjacent to the bottom dead center) so that, in a given engine speed range, a phase (28) of low instantaneous exhaust pressure prevailing in the exhaust pipe enables the inlet pipe (1a)/cylinder (1)/exhaust pipe (1e) to be scavenged while the inlet valve (5) and the exhaust valve (6) are simultaneously open. The phase (29) of high instantaneous exhaust pressure, caused by another cylinder, after the inlet valve (5) has closed and while the exhaust valve (6) is still open, is used for post-charging the cylinder (1) with air (A) previously stored in the exhaust pipe (1e). The size of the turbine (T) is selected so that there is virtually no post-charging of the cylinder (1) with exhaust gases at engine speeds above said given engine speed range.
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