System and Method for Controlling Valve Timing of an Engine with Cylinder Deactivation
First Claim
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1. A system comprising:
- an engine having a first bank and a second bank, with each of said banks having cylinders, the engine having a first group of cylinder including cylinders from said first and second banks, and a second group of cylinders from said first and second banks;
a first emission control device coupled exclusively to said first group of cylinders; and
a second emission control device coupled to both said first and second groups.
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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
21 Claims
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1. A system comprising:
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an engine having a first bank and a second bank, with each of said banks having cylinders, the engine having a first group of cylinder including cylinders from said first and second banks, and a second group of cylinders from said first and second banks;
a first emission control device coupled exclusively to said first group of cylinders; and
a second emission control device coupled to both said first and second groups. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system comprising:
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an engine having a first and second bank of cylinders, said first bank having a first and second group of cylinders, said second bank having a third and fourth group of cylinders;
a first emission control device coupled to said engine to receive gasses exhausted from said first group; and
a second emission control device coupled to said engine to receive gasses exhausted from said third group. - View Dependent Claims (13, 14, 15, 16)
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17. A system comprising:
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an engine having a first and second bank of cylinders, said first bank having a first and second group of cylinders, said second bank having a third and fourth group of cylinders;
a first emission control device coupled to said engine to receive gasses exhausted from said first group and said third group; and
a second emission control device coupled to said engine to receive gasses exhausted from said first, second, third, and fourth group. - View Dependent Claims (18, 19, 20, 21)
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Specification