Exhaust system component input pressure estimation systems and methods
First Claim
1. A pressure determination system for a vehicle, comprising:
- an output pressure module that sets an output pressure of a first component of an exhaust system of the vehicle equal to one of;
an input pressure of a second component that is immediately downstream of the first component in the exhaust system; and
ambient air pressure;
a pressure drop module that determines a pressure drop between an input of the first component and an output of the first component based a temperature of exhaust input to the first component;
an input pressure module that determines an input pressure of the first component based on a sum of the output pressure of the first component and the pressure drop between the input and the output of the first component; and
an actuator control module that selectively controls at least one engine actuator based on at least one of the input and output pressures of the first component.
1 Assignment
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Accused Products
Abstract
An output pressure module that sets an output pressure of a first component of an exhaust system of the vehicle equal to one of: an input pressure of a second component that is immediately downstream of the first component in the exhaust system; and ambient air pressure. A pressure drop module determines a pressure drop between an input of the first component and an output of the first component based a temperature of exhaust input to the first component. An input pressure module determines an input pressure of the first component based on a sum of the output pressure of the first component and the pressure drop between the input and the output of the first component. An actuator control module selectively controls at least one engine actuator based on at least one of the input and output pressures of the first component.
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Citations
20 Claims
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1. A pressure determination system for a vehicle, comprising:
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an output pressure module that sets an output pressure of a first component of an exhaust system of the vehicle equal to one of; an input pressure of a second component that is immediately downstream of the first component in the exhaust system; and ambient air pressure; a pressure drop module that determines a pressure drop between an input of the first component and an output of the first component based a temperature of exhaust input to the first component; an input pressure module that determines an input pressure of the first component based on a sum of the output pressure of the first component and the pressure drop between the input and the output of the first component; and an actuator control module that selectively controls at least one engine actuator based on at least one of the input and output pressures of the first component. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for a vehicle, comprising:
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setting an output pressure of a first component of an exhaust system of the vehicle equal to one of; an input pressure of a second component that is immediately downstream of the first component in the exhaust system; and ambient air pressure; determining a pressure drop between an input of the first component and an output of the first component based a temperature of exhaust input to the first component; determining an input pressure of the first component based on a sum of the output pressure of the first component and the pressure drop between the input and the output of the first component; and selectively controlling at least one engine actuator based on at least one of the input and output pressures of the first component. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification