ENGINE FUELING CONTROL DURING CYLINDER VALVE MODE TRANSITIONS
First Claim
1. A method of control fueling of a cylinder in an internal combustion engine, the cylinder having at least two intake valves, the method comprising:
- operating in a first mode with one active intake valve and one inactive intake valve during a cycle of the cylinder;
operating in a second mode with two active intake valves during a cycle of the cylinder; and
adjusting a fuel injection from an injector configured to deliver fuel through at least the two intake valves, where the fuel injection adjustment is responsive to a transition in modes and based on whether the transition is from the first mode to the second mode, or from the second mode to the first mode.
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Accused Products
Abstract
A method of control fueling of a cylinder in an internal combustion engine, the cylinder having at least two intake valves, the method comprising of operating in a first mode with one active intake valve and one inactive intake valve during a cycle of the cylinder operating in a second mode with two active intake valves during a cycle of the cylinder and adjusting a fuel injection from an injector configured to deliver fuel through at least the two intake valves, where the fuel injection adjustment is responsive to a transition in modes and based on whether the transition is from the first mode to the second mode, or from the second mode to the first mode.
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Citations
19 Claims
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1. A method of control fueling of a cylinder in an internal combustion engine, the cylinder having at least two intake valves, the method comprising:
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operating in a first mode with one active intake valve and one inactive intake valve during a cycle of the cylinder; operating in a second mode with two active intake valves during a cycle of the cylinder; and adjusting a fuel injection from an injector configured to deliver fuel through at least the two intake valves, where the fuel injection adjustment is responsive to a transition in modes and based on whether the transition is from the first mode to the second mode, or from the second mode to the first mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of control fueling of cylinders in an internal combustion engine, the cylinders each having at least two intake valves, the method comprising:
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operating cylinders in a first mode with one active intake valve and one inactive intake valve during a cylinder cycle, where the active valve alternates among the two intake valves; operating cylinders in a second mode with two active intake valves during a cylinder cycle; transitioning between the modes, where one cylinder transitions valve modes during each engine cycle until all cylinders transition valve mode, where when transitioning from the second mode to the first mode, increasing torque in remaining cylinders not transitioning, while decreasing air via valve timing in the cylinder undergoing transition to match available fuel, and when transitioning from the first mode to the second mode, decreasing torque in remaining cylinders not transitioning, while increasing air via valve timing in the cylinder undergoing transition to match available fuel; and adjusting fuel injection during the transition. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A system for an engine having a plurality of cylinders, comprising:
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a cylinder with first and second intake ports, the cylinder further having a first electrically actuated intake valve coupling the first port to the cylinder and a second electrically actuated intake valve coupling the second port to the cylinder; a fuel injector coupled to the cylinder, the injector positioned relative to the first and second port to inject at least some fuel in at least the first and second port during fuel injection; a control system for operating in a first mode with one active intake valve and one inactive intake valve during a cycle of the cylinder, where the active intake valve alternates among the first and second electrically actuated intake valve, which is active at least during a portion of an intake stroke of the cylinder, operating in a second mode with both the first and second electrically actuated intake valves active during a cycle of the cylinder, and adjusting a fuel injection from the injector, where the fuel injection adjustment is responsive to a transition in modes and based on whether the transition is from the first mode to the second mode, or from the second mode to the first mode - View Dependent Claims (17, 18, 19)
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Specification