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US 9,752,464 B2Granted
Supercharged applied ignition internal combustion engine with exhaust-gas turbocharging and method for operating an internal combustion engine of said type
AssigneeFord Global Technologies, LLC
InventorsMartin Wirth, Klemens Grieser, Marco Marceno, Kay Hohenboeken, Jan Linsel, Harald Stoffels, Ludwig Stump
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Abstract
A turbocharged internal combustion engine is provided with at least a partially variable valve train on an intake side wherein the intake valves are controlled to optimize the actuation of a second inlet valve in relation to a first inlet valve for different load conditions.
Claims9
A method for operating a supercharged applied-ignition internal combustion engine, comprising:
- actuating a first inlet valve and a second inlet valve of a cylinder of the engine by rotationally offsetting cams respectively coupled to the first inlet valve and the second inlet valve thereby forming a control offset (Δ);
- actuating the first inlet valve earlier than the second inlet valve at a low load demand;
- opening a throttle flap and reducing the control offset (Δ) by actuating the second inlet valve earlier than when actuated to form the control offset (Δ) at an increasing load demand over time;
- and
- increasing the control offset (Δ) dependent on a charge pressure generated in an intake system by exhaust-gas turbocharging by actuating the second inlet valve later than when actuated to form the control offset (Δ).
2 more elements
Dependencies are inferred from the claim text.