Dual active fuel management sequencing
First Claim
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1. A system comprising:
- a cylinder selection module that selects cylinders of an engine for active fuel management;
a valve deactivation module that deactivates intake valves of selected cylinders of said engine before deactivating exhaust valves of said selected cylinders when an engine speed of said engine is less than or equal to a predetermined speed,a torque request monitoring module that monitors a requested torque; and
a valve activation module that activates said exhaust valves deactivated by said deactivation module before activating said intake valves deactivated by said deactivation module when said requested torque is greater than or equal to said predetermined torque and when said engine speed is greater than said predetermined speed.
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Abstract
A system includes a cylinder selection module and a valve deactivation module. The cylinder selection module selects cylinders of an engine for active fuel management. The valve deactivation module deactivates intake valves of selected cylinders of the engine before deactivating exhaust valves of the selected cylinders when an engine speed of the engine is less than or equal to a predetermined speed.
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Citations
13 Claims
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1. A system comprising:
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a cylinder selection module that selects cylinders of an engine for active fuel management; a valve deactivation module that deactivates intake valves of selected cylinders of said engine before deactivating exhaust valves of said selected cylinders when an engine speed of said engine is less than or equal to a predetermined speed, a torque request monitoring module that monitors a requested torque; and a valve activation module that activates said exhaust valves deactivated by said deactivation module before activating said intake valves deactivated by said deactivation module when said requested torque is greater than or equal to said predetermined torque and when said engine speed is greater than said predetermined speed. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method comprising:
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selecting cylinders of an engine for active fuel management; deactivating intake valves of selected cylinders of said engine before deactivating exhaust valves of said selected cylinders when an engine speed of said engine is less than or equal to a predetermined speed; monitoring a requested torque; and activating deactivated ones of said exhaust valves before activating deactivated ones of said intake valves when said requested torque is greater than or equal to said predetermined torque and when said engine speed is greater than said predetermined speed. - View Dependent Claims (9, 10, 11, 12, 13)
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Specification