Back to results
US 2014/0196704 A1Published application
Turbocharger boost control using exhaust pressure estimated from engine cylinder pressure
AssigneeBorgWarner Inc.
InventorsJohn Shutty, Wolfgang Wenzel
Life of this patent
Estimating the term…
Abstract
Controlling turbocharger boost pressure using exhaust pressure estimated from engine cylinder pressure.
Claims12
A method comprising:
- sensing pressure within an engine cylinder;
- estimating exhaust pressure based on the sensed pressure within the engine cylinder;
- and
- controlling turbocharger boost pressure based on the estimated exhaust pressure.
1 more element
A method comprising:
- determining a boost pressure deviation between a boost pressure setpoint and an actual boost pressure;
- producing an exhaust pressure setpoint in response to the boost pressure deviation;
- determining an exhaust pressure deviation between the exhaust pressure setpoint and an exhaust pressure estimate that is estimated from actual cylinder pressure;
- and
- producing a turbocharger command in response to the exhaust pressure deviation.
2 more elements
A method comprising:
- determining a boost pressure deviation between a boost pressure setpoint and an actual boost pressure;
- producing a closed-loop exhaust pressure setpoint adjustment in response to the boost pressure deviation;
- producing an open-loop exhaust pressure setpoint from inputs of the boost pressure setpoint and an exhaust gas recirculation parameter;
- combining the closed-loop exhaust pressure setpoint adjustment with the open-loop exhaust pressure setpoint to produce an exhaust pressure setpoint;
- determining an exhaust pressure deviation between the exhaust pressure setpoint and an exhaust pressure estimate that is estimated from actual cylinder pressure;
- producing a closed-loop turbocharger command adjustment in response to the exhaust pressure deviation;
- producing an open-loop turbocharger command from an input of the exhaust pressure setpoint;
- and
- combining the closed-loop turbocharger adjustment with the open-loop turbocharger command to produce the turbocharger command.
6 more elements
Dependencies are inferred from the claim text.