# US 2014/0150425 A1 · Method for controlling an exhaust gas recirculation system

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- Number: US 2014/0150425 A1
- Document ID: US20140150425A1
- Status: Published application
- Kind: A1
- Application number: 14/091,209
- Filed: 2013-11-26
- Published: 2014-06-05
- Earliest claimed: 2012-12-03
- Assignees: Robert Bosch GmbH
- Inventors: Patrick MENOLD; Rainer MAIER; Isabelle ELSNER
- Web page: https://patentgrep.com/patent/US20140150425A1

## CPC

- F02M 26/05: High pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust system upstream of the turbine and reintroduced into the intake system downstream of the compressor
- F02D 41/0007: {for control of turbo-charged or super-charged engines (control of the pumps per se F02B37/12)}
- F02D 41/005: {according to engine operating conditions}
- F02M 26/25: with coolers having bypasses
- F02D 2021/083: {controlling exhaust gas recirculation electronically}
- Y02T 10/12: Improving ICE efficiencies
- Y02T 10/40: Engine management systems
- F02M: SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02D: CONTROLLING COMBUSTION ENGINES (vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed B60K31/00; conjoint control of vehicle sub-units of different type or different function, road vehicle drive control systems for purposes other than the control of a single sub-unit B60W)
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

A method for controlling an exhaust gas recirculation system of an internal combustion engine includes: determining a setpoint power to be output by the internal combustion engine; and limiting an exhaust gas flow conducted through the exhaust gas recirculation system based on the setpoint power.

## Claims

### Claim 1

A method for controlling an exhaust gas recirculation system of an internal combustion engine, comprising:
determining a setpoint power to be output by the internal combustion engine; and
limiting an exhaust gas flow conducted through the exhaust gas recirculation system based on the setpoint power.

### Claim 2 (depends on 1)

The method as recited in claim 1, wherein the internal combustion engine includes a turbocharger, and the limitation of exhaust gas flow through the exhaust gas recirculation system is dependent on a setpoint exhaust gas flow through a turbine of the turbocharger.

### Claim 3 (depends on 2)

The method as recited in claim 2, wherein the setpoint exhaust gas flow through the turbine of the turbocharger is dependent on a power of the turbocharger which is required to generate the setpoint power to be output by the internal combustion engine.

### Claim 4 (depends on 3)

The method as recited in claim 3, wherein the setpoint exhaust gas flow is calculated based on the required power of the turbocharger and at least one of a temperature of the exhaust gas, an ambient temperature, an ambient pressure, and a pressure of the exhaust gas downstream from the turbocharger.

### Claim 5 (depends on 4)

The method as recited in claim 4, wherein the temperature of the exhaust gas is one of (i) an estimated value, (ii) a measured value, or (iii) a predefined value.

### Claim 6 (depends on 4)

The method as recited in claim 4, wherein the internal combustion engine is operated in a lean operating mode.

### Claim 7 (depends on 4)

The method as recited in claim 4, wherein the internal combustion engine powers a motor vehicle controlled by a driver, and wherein the setpoint power is dependent on the driver's input torque for the motor vehicle.

### Claim 8

A control device for controlling an exhaust gas recirculation system of an internal combustion engine, comprising:
means for determining a setpoint power to be output by the internal combustion engine; and
means for limiting an exhaust gas flow conducted through the exhaust gas recirculation system based on the setpoint power.

### Claim 9

A non-transitory computer-readable data storage medium storing a computer program having program codes which, when executed on a computer, performs method for controlling an exhaust gas recirculation system of an internal combustion engine, the method comprising:
determining a setpoint power to be output by the internal combustion engine; and
limiting an exhaust gas flow conducted through the exhaust gas recirculation system based on the setpoint power.