Method and device for correlating cylinder charge and maximum intake valve lift of internal combustion engine
AssigneesHyundai Motor Company, Kia Motors Corporation, Hyundai Motor Europe Technical Center GmbH
InventorsPatrizio Agostinelli, Juergen Werner
Life of this patent
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Abstract
A method for determining a cylinder charge of an internal-combustion engine having valves with a variable valve gear, may include determining a maximum intake valve lift, calculating a standardized cylinder charge relative to at least one of a defined intake spread of an intake valve opening phase and a defined exhaust spread of an exhaust valve opening phase, as a function of the maximum intake valve lift, determining an overlap value, which characterizes an actual overlap of the intake valve opening phase and the exhaust valve opening phase, and determining a corrected cylinder charge based on the standardized cylinder charge and the overlap value.
Claims13
A method for determining a maximum intake valve lift of an internal-combustion engine having valves with a variable valve gear, the method comprising:
- determining a desired cylinder charge;
- determining an overlap value, which characterizes an actual overlap of an intake valve opening phase and an exhaust valve opening phase;
- calculating a standardized cylinder charge relative to at least one of a defined intake spread of the intake valve opening phase and a defined exhaust spread of the exhaust valve opening phase, based on the desired cylinder charge and the overlap value;
- and
- determining the maximum intake valve lift as a function of the standardized cylinder charge.
A device for determining a maximum intake valve lift of an internal-combustion engine having valves with a variable valve gear, comprising:
- a cylinder-charge determiner, which determines a desired cylinder charge;
- an overlap determiner, which determines an overlap value characterizing an actual overlap of an intake valve opening phase and an exhaust valve opening phase;
- a cylinder-charge calculation unit, which calculates a standardized cylinder charge relative to at least one of a defined intake spread of the intake valve opening phase and a defined exhaust spread of the exhaust valve opening phase, based on the desired cylinder charge and the overlap value;
- and
- a valve-lift calculation unit, which calculates the maximum intake valve lift as a function of the standardized cylinder charge.
Dependencies are inferred from the claim text.