Process for controlling the valves of an internal combustion engine
AssigneePeugeot Citroen Automobiles SA
InventorM. Pascal Turquis
Life of this patent
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Abstract
The present invention pertains to a process and a system for controlling the intake valves of an internal combustion engine comprising at least two valves per cylinder During the closing of the intake valves of a cylinder, provisions are made for closing a first valve and then for closing a second valve, the time between the closing of the first valve and the closing of the second valve being such that it permits the propagation toward the second valve of at least one overpressure generated in the first port by the closing of the first valve.
Claims16
Process for controlling the opening and the closing of intake valves of an internal combustion engine comprising at least one first and at least one second valve per said cylinder, each valve permitting a first and a second intake port, of the cylinder, respectively, to be closed or opened, and being actuated cyclically in terms of opening and closing, characterized in that it comprises the following steps during the closing of the intake valves of a cylinder:
- a first step of closing of the first valve,
- then a second step of closing of the second valve, the time, T, between the closing of the first valve and the closing of the second valve being such that it permits the propagation toward the second valve of at least one overpressure generated in the first port by the closing of the first valve.
System for controlling the opening and closing of the intake valves of an internal combustion engine comprising at least one first and second valves per said cylinder, each valve being actuated cyclically by a actuating device to close or open a first and second intake ports of the cylinder, respectively, characterized in that it comprises a central control unite that makes it possible to control the actuating devices in terms of the closing of the valves in such a way as to actuate the closing of the first valved and, then, a time, T, later, the closing of the second valve.
Dependencies are inferred from the claim text.