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 timing of an engine intake valve actuation and limiting an amount of fuel injected into a cylinder of the engine in response to one of the first and second temperatures being above a predetermined value andthe other of the first and second temperatures being 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
37 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 timing of an engine intake valve actuation and limiting an amount of fuel injected into a cylinder of the engine in response to one of the first and second temperatures being above a predetermined value and the other of the first and second temperatures being below a predetermined value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. 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 temperature of the engine; a second sensor adapted to sense a second temperature of the engine; and a controller adapted to engage the valve actuator with the intake valve and to limit an amount of fuel injected into a cylinder of the engine when one of the first and second temperatures is above a predetermined value and the other of the first and second temperatures is below a predetermined value. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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21. 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 a flow of 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 temperature of the engine; a second sensor adapted to sense a second temperature of the engine; and a controller adapted to engage the valve actuator with the intake valve and to limit an amount of fuel injected into a cylinder of the engine when one of the first and second temperatures is above a predetermined value and 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 the first and second temperatures are each above a predetermined value. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29)
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30. 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 temperature of the engine and to deliver a first signal indicative of the first temperature; a second sensor adapted to sense a second temperature of the engine and to deliver a second signal indicative 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 and to limit an amount of fuel injected into a cylinder of the engine when one of the first and second temperatures is above a predetermined value and when the other of the first and second temperatures is below a predetermined value. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37)
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Specification