Engine control system with throttle preload during cylinder deactivation
First Claim
1. An engine control system for a displacement on demand internal combustion engine, comprising:
- a throttle preload signal generator that outputs a throttle preload area signal having a base portion and ramp out portion; and
a combining circuit for combining said throttle preload area signal with a current throttle area signal to generate a throttle preload difference signal that adjusts throttle area to smooth transitions during at least one of cylinder activation and deactivation.
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Abstract
An engine control system and method for a displacement on demand internal combustion engine includes a throttle preload signal generator that outputs a throttle preload area signal having a base portion and ramp out portion. A combining circuit combines the throttle preload area signal with a current throttle area signal to generate a throttle preload difference signal that adjusts throttle area to smooth transitions during at cylinder deactivation. The engine control system smoothes the transition between activated and inactivated modes by increasing throttle area and manifold pressure when transitioning between activated and deactivated modes.
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Citations
20 Claims
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1. An engine control system for a displacement on demand internal combustion engine, comprising:
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a throttle preload signal generator that outputs a throttle preload area signal having a base portion and ramp out portion; and
a combining circuit for combining said throttle preload area signal with a current throttle area signal to generate a throttle preload difference signal that adjusts throttle area to smooth transitions during at least one of cylinder activation and deactivation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for smoothing transitions in a displacement on demand engine, comprising:
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generating a throttle preload area signal having a base portion and ramp out portion;
combining said throttle preload area signal with a current throttle area signal to generate a preload difference signal; and
adjusting throttle area using said preload difference signal to smooth transitions during at least one of cylinder activation and deactivation. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification