US 7,770,392 B2 · Apparatus for controlling an internal combustion engine having an exhaust gas turbocharger and an exhaust gas recirculation apparatus

Abstract

A control apparatus for an internal combustion engine has an exhaust-gas turbocharger regulator which, as a function of a setpoint boost pressure and an actual boost pressure, determines a controlled actuating-variable exhaust-gas back-pressure. An exhaust-gas recirculation regulator determines, as a function of a setpoint air mass flow and an actual air mass flow, a controlled actuating-variable exhaust-gas recirculation mass flow. A first decoupling unit determines a decoupling mass flow in an exhaust-gas section. A second decoupling unit determines a decoupling exhaust-gas back-pressure. A first conversion unit determines a signal for the exhaust-gas turbocharger actuator as a function of the pilot-control actuating-variable exhaust-gas back-pressure, the controlled actuating-variable exhaust-gas back-pressure and the decoupling mass flow. A second conversion unit determines a signal for the exhaust-gas recirculation valve as a function of the pilot-control actuating-variable exhaust-gas recirculation mass flow, the controlled actuating-variable exhaust-gas recirculation mass flow and the decoupling exhaust-gas back-pressure.

Claims17

Dependent claims

A method for controlling an internal combustion engine having at least one exhaust gas turbocharger with at least one exhaust gas turbocharger actuator, an exhaust gas recirculation device with an exhaust gas recirculation valve, wherein the method comprising the steps of:

determining by an exhaust gas turbocharger controller a feedback control actuating variable exhaust gas back pressure as a function of a setpoint boost pressure and an actual boost pressure;
determining by an exhaust gas recirculation controller a feedback control exhaust gas recirculation actuating variable, as a function of a setpoint mass air flow and an actual mass air flow;
determining by a decoupling unit a decoupling mass flow in an exhaust gas tract downstream of a branch-off of the exhaust gas recirculation device which is dependent on the feedback control exhaust gas recirculation actuating variable, and
determining by a conversion unit an actuating signal for the exhaust gas turbocharger actuator as a function of the feedback control actuating variable exhaust gas back pressure and the decoupling mass flow.

1 more element

A device for controlling an internal combustion engine having at least one exhaust gas turbocharger with at least one exhaust gas turbocharger actuator, an exhaust gas recirculation device with an exhaust gas recirculation valve, wherein the device comprises:

an exhaust gas turbocharger controller which determines a feedback control actuating variable exhaust gas back pressure as a function of a setpoint boost pressure and an actual boost pressure;
an exhaust gas recirculation controller which determines a feedback control exhaust gas recirculation actuating variable, as a function of a setpoint mass air flow and an actual mass air flow;
a decoupling unit which determines a decoupling mass flow in an exhaust gas tract downstream of a branch-off of the exhaust gas recirculation device and is dependent on the feedback control exhaust gas recirculation actuating variable, and
a conversion unit which determines an actuating signal for the exhaust gas turbocharger actuator as a function of the feedback control actuating variable exhaust gas back pressure and the decoupling mass flow.

1 more element

Dependencies are inferred from the claim text.

Apparatus for controlling an internal combustion engine having an exhaust gas turbocharger and an exhaust gas recirculation apparatus

Life of this patent

Apparatus for controlling an internal combustion engine having an exhaust gas turbocharger and an exhaust gas recirculation apparatus

Life of this patent

Abstract

Claims17