Airflow control systems and methods
First Claim
1. An engine control system for a vehicle, comprising:
- a delay and rate limit module that determines a delay period based on an engine speed and an exhaust gas recirculation (EGR) value, that stores a first torque request for the delay period to produce a delayed torque request, that determines a rate limit based on the engine speed and the EGR value, and that applies the rate limit to the delayed torque request to produce a second torque request;
a throttle control module that determines a target throttle opening based on the second torque request and that, via a throttle actuator module, selectively adjusts a throttle valve based on the target throttle opening;
a phaser control module that determines target intake and exhaust phasing values based on the second torque request and that, via a phaser actuator module, selectively adjusts intake and exhaust valve phasers based on the target intake and exhaust phasing values, respectively; and
an EGR control module that determines a target EGR opening based on the first torque request and that, via an EGR actuator module, selectively adjusts an EGR valve based on the target EGR opening.
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Accused Products
Abstract
An engine control system for a vehicle, includes a delay and rate limit module, a throttle control module, a phaser control module, and an exhaust gas recirculation (EGR) control module. The delay and rate limit module applies a delay and a rate limit to a first torque request to produce a second torque request. The throttle control module determines a target throttle opening based on the second torque request and selectively adjusts a throttle valve based on the target throttle opening. The phaser control module determines target intake and exhaust phasing values based on the second torque request and selectively adjusts intake and exhaust valve phasers based on the target intake and exhaust phasing values, respectively. The EGR control module determines a target EGR opening based on the first torque request and selectively adjusts an EGR valve based on the target EGR opening.
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Citations
18 Claims
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1. An engine control system for a vehicle, comprising:
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a delay and rate limit module that determines a delay period based on an engine speed and an exhaust gas recirculation (EGR) value, that stores a first torque request for the delay period to produce a delayed torque request, that determines a rate limit based on the engine speed and the EGR value, and that applies the rate limit to the delayed torque request to produce a second torque request; a throttle control module that determines a target throttle opening based on the second torque request and that, via a throttle actuator module, selectively adjusts a throttle valve based on the target throttle opening; a phaser control module that determines target intake and exhaust phasing values based on the second torque request and that, via a phaser actuator module, selectively adjusts intake and exhaust valve phasers based on the target intake and exhaust phasing values, respectively; and an EGR control module that determines a target EGR opening based on the first torque request and that, via an EGR actuator module, selectively adjusts an EGR valve based on the target EGR opening. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An engine control method for a vehicle, comprising:
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determining a delay period based on an engine speed and an exhaust gas recirculation (EGR) value; storing a first torque request for the delay period to produce a delayed torque request; determining a rate limit based on the engine speed and the EGR value; applying the rate limit to the delayed torque request to produce a second torque request; determining a target throttle opening based on the second torque request; selectively adjusting a throttle valve based on the target throttle opening; determining target intake and exhaust phasing values based on the second torque request; selectively adjusting intake and exhaust valve phasers based on the target intake and exhaust phasing values, respectively; determining a target EGR opening based on the first torque request; and selectively adjusting an EGR valve based on the target EGR opening. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification