Residual burnt gas scavenging method with double intake...

Details Residual burnt gas scavenging method with double intake... Residual burnt gas scavenging method with double intake...

2009-01-28

2011-10-18

Wolfe, Jr., Willis (Department: 3747)

Internal-combustion engines

Charge forming device

Exhaust gas used with the combustible mixture

C123S316000, C123S090150

Reexamination Certificate

active

08037873

ABSTRACT:
The present invention relates to a method of scavenging residual burnt gas of a direct-injection internal-combustion engine, notably of diesel type, comprising at least one cylinder (10) including a combustion chamber (12), at least one exhaust means (14) with an exhaust valve (18) controlled by exhaust control means (42), at least one intake means (24) with an intake valve (28) controlled by intake control means (40) and a processing unit (44) receiving the values relative to the intake pressure (Pa) and to the exhaust pressure (Pe) of the engine. The method consists, when the engine runs under low speed and high load conditions, in carrying out a sequence of opening/closing of exhaust valves (18) during the exhaust phase of the engine, during this exhaust valve opening/closing sequence, in carrying out at least one sequence of opening/closing of intake valves (28) so as to achieve scavenging of the residual burnt gas.

REFERENCES:
patent: 5819693 (1998-10-01), Curtil
patent: 7318314 (2008-01-01), Pagot et al.
patent: 7730874 (2010-06-01), Leduc et al.
patent: 7908913 (2011-03-01), Cinpinski et al.
patent: 2006/0272623 (2006-12-01), Pagot
patent: 2 886 342 (2006-12-01), None

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