Engine system and method with cylinder deactivation
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Accused Products
Abstract
Various systems and methods are disclosed for carrying out combustion in a fuel-cut operation in some or all of the engine cylinders of a vehicle. Further, various subsystems are considered, such as fuel vapor purging, air-fuel ratio control, engine torque control, catalyst design, and exhaust system design.
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Citations
15 Claims
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1-10. -10. (canceled)
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11. A method for operating an engine, the method comprising:
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in response to a pedal tip-out by the vehicle driver, operating a first group of cylinders without injected fuel and a second set of cylinder to combust a lean air-fuel mixture, and mixing gasses exhaust from the first and second cylinders, and treating the mixed exhaust gasses in an emission control device capable of storing NOx in excess oxygen conditions. - View Dependent Claims (12, 13, 14, 15)
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Specification