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US 8,997,484 B2Granted
Boost reservoir control
AssigneeFord Global Technologies, LLC
InventorsJohn Eric Rollinger, Adam J. Richards, Alex O'Connor Gibson, David Bell, Julia Helen Buckland
Life of this patent
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Abstract
Methods and systems are provided for reducing turbo lag in a boosted engine. A boost reservoir coupled to the engine may be charged with compressed intake air and/or combusted exhaust gas. The pressurized charge may then be discharged during a tip-in to either the intake or the exhaust manifold.
Claims20
A method for controlling a turbocharged engine with an electronic controller, comprising:
- responsive to a first accelerator pedal tip-in determined by the controller, discharging pressurized charge from a boost reservoir to an intake manifold via an intake discharge valve;
- and
- during a second accelerator pedal tip-in determined by the controller, discharging pressurized charge from the boost reservoir to an exhaust manifold via an exhaust discharge valve.
A method for controlling an engine with an electronic controller, comprising,
- charging a boost reservoir coupled to the engine with one or more of fresh intake air from an intake manifold and combusted exhaust gas from an exhaust manifold via at least a valve;
- and
- responsive to an accelerator pedal tip-in determined by the controller, selectively discharging pressurized charge from the boost reservoir to the intake manifold or the exhaust manifold, the selection made via the controller based on an EGR percentage of the pressurized charge via at least the valve.
An engine system, comprising:
- an engine including an intake manifold and an exhaust manifold;
- a turbocharger including a compressor and a turbine;
- a boost reservoir coupled to the intake manifold via each of an intake charge valve and an intake discharge valve, the boost reservoir further coupled to the exhaust manifold via each of an exhaust charge valve and an exhaust discharge valve;
- and
- a controller with computer readable instructions for,
- charging the boost reservoir with combusted exhaust gas and compressed intake air to store a pressurized charge having a charge pressure and a charge EGR percentage;
- and
- during an accelerator pedal tip-in as determined by the controller when pedal position exceeds a threshold, discharging the pressurized charge from the boost reservoir to each of the intake and the exhaust manifold for different levels of boost in the reservoir at the accelerator pedal tip-in.
5 more elements
Dependencies are inferred from the claim text.