System and method for reactivating engine cylinders
First Claim
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1. A method for operating an engine including a cylinder deactivation system and a variable valve timing system, comprising:
- activating one or more deactivated cylinder valves via a controller in response to a request to adjust a phase of an engine camshaft relative to an engine crankshaft; and
adjusting a the phase of the engine camshaft via torque provided via activating the one or more deactivated cylinder valves.
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Abstract
Systems and methods for operating an engine with deactivating valves are presented. In one example, deactivated valves may be reactivated to increase a rate of camshaft phase indexing relative to engine crankshaft position. However, if a desired rate of camshaft indexing is low, the engine cylinders may remain deactivated based on the low rate of desired camshaft indexing.
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Citations
20 Claims
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1. A method for operating an engine including a cylinder deactivation system and a variable valve timing system, comprising:
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activating one or more deactivated cylinder valves via a controller in response to a request to adjust a phase of an engine camshaft relative to an engine crankshaft; and adjusting a the phase of the engine camshaft via torque provided via activating the one or more deactivated cylinder valves. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for operating an engine including a cylinder deactivation system and a variable valve timing system, comprising:
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activating one or more deactivated cylinder valves via a controller in response to a request to adjust the phase of an engine camshaft during a first condition; and not activating one or more deactivated cylinder valves via a controller in response to a request to adjust the phase of an engine camshaft during a second condition. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
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15. A vehicle system, comprising:
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an engine including a torque actuated camshaft, a crankshaft, a cylinder deactivation system and a variable valve timing system; and a controller including non-transitory executable instructions, which when executed by the controller, cause the controller to adjust a phase of the torque actuated camshaft relative to the crankshaft in response to reactivating one or more deactivated valves of the engine. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification