Control system and method for a valve actuator
First Claim
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1. A method of controlling an engine having a valve actuator, comprising:
- sensing a first parameter indicative of a first temperature of the engine;
sensing a second parameter indicative of a second temperature of the engine;
enabling the valve actuator to implement a variation on conventional engine valve actuation timing in response to one of the first and second temperatures being above a predetermined value; and
limiting an amount of fuel injected into a cylinder of the engine when the other of the first and second temperatures is below a predetermined value.
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Abstract
A method of controlling an engine having a valve actuation system is provided. The engine is started. A first parameter indicative of a first temperature of the engine is sensed. A second parameter indicative of a second temperature of the engine is sensed. The valve actuation system is disabled to prevent the implementation of a variation on conventional engine valve actuation timing in response to each of the first and second temperatures being below a predetermined value.
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Citations
38 Claims
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1. A method of controlling an engine having a valve actuator, comprising:
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sensing a first parameter indicative of a first temperature of the engine;
sensing a second parameter indicative of a second temperature of the engine;
enabling the valve actuator to implement a variation on conventional engine valve actuation timing in response to one of the first and second temperatures being above a predetermined value; and
limiting an amount of fuel injected into a cylinder of the engine when the other of the first and second temperatures is below a predetermined value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 11, 31, 32)
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10. (Cancelled).
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12. A valve actuation system for an engine having an intake valve moveable between a first position where the intake valve prevents a flow of fluid and a second position where the intake valve allows a flow of fluid, comprising:
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a valve actuator adapted to selectively engage the intake valve to prevent the intake valve from returning to the first position;
a first sensor adapted to sense a first parameter indicative of a first temperature of the engine;
a second sensor adapted to sense a second parameter indicative of a second temperature of the engine; and
a controller adapted to engage the valve actuator with the intake valve when one of the first and second temperatures is above a predetermined value and to limit an amount of fuel injected into a cylinder of the engine when the other of the first and second temperatures is below a predetermined value. - View Dependent Claims (13, 14, 15, 16, 17, 33, 34)
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18. An engine system, comprising,
an engine block defining a cylinder; -
a piston slidably disposed within the cylinder, the piston moveable between a top dead center position and a bottom dead center position;
a fuel injection system adapted to inject a quantity of fuel into the cylinder;
an intake valve operatively associated with the cylinder and moveable between a first position where the intake valve prevents fluid from flowing relative to the cylinder and a second position where the fluid is allowed to flow relative to the cylinder;
a valve actuator adapted to selectively engage the intake valve to prevent the intake valve from returning to the first position;
a first sensor adapted to sense a first parameter indicative of a first temperature of the engine;
a second sensor adapted to sense a second parameter indicative of a second temperature of the engine; and
a controller adapted to engage the valve actuator with the intake valve when one of the first and second temperatures is above a predetermined value, to limit an amount of fuel injected into the cylinder of the engine when the other of the first and second temperatures is below a predetermined value, and to cease limiting the amount of fuel injected into the cylinder of the engine when each of the first and second temperatures are above a predetermined value. - View Dependent Claims (19, 20, 21, 22, 23, 24, 35, 36)
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25. A valve actuation system for an engine having an intake valve moveable between a first position where the intake valve prevents a flow of fluid and a second position where the intake valve allows a flow of fluid, comprising:
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a valve actuator adapted to selectively engage the intake valve to prevent the intake valve from returning to the first position;
a first sensor adapted to sense a first parameter indicative of a first temperature of the engine and to deliver a first signal including a representation of the first temperature;
a second sensor adapted to sense a second parameter indicative of a second temperature of the engine and to deliver a second signal including a representation of the second temperature; and
a controller adapted to receive the first and second signals and to engage the valve actuator with the intake valve when one of the first and second temperatures is above predetermined value and to limit an amount of fuel injected into a cylinder of the engine when the other of the first and second temperatures is below a predetermined value. - View Dependent Claims (26, 27, 28, 29, 30, 37, 38)
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Specification