Process for controlling self-ignition in a 4-stroke engine
AssigneeInstitut Francais du Petrole
InventorsPierre Duret, Jacques Lavy
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Abstract
The present invention is a process for controlling self-ignition in a four-stroke engine comprising variable control of the opening and the closing of the intake and exhaust in the combustion chamber as a function of the engine load. At partial load the invention performs (a) prolonged retention of burned gases in the combustion chamber, and (b) a fresh gas intake period which overall follows the retention period, in order to minimize mixing of the fresh gases with the burned gases and to control the amount of burned gases retained in the combustion chamber.
Claims21
A process for controlling self-ignition in a four-stroke engine having variable control of opening and closing of intake and exhaust in a combustion chamber under partial load as a function of the load of the engine comprising:
- (a) prolonging retention of burned gases in the combustion chamber;
- and
- (b) providing a fresh gas intake period which overall follows the retention of burned gases while minimizing mixing of the fresh gases with burned gases and controlling the retention of burned gases in the combustion chamber.
Dependencies are inferred from the claim text.