# US 2014/0150761 A1 · Drive system for a motor vehicle

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- Number: US 2014/0150761 A1
- Document ID: US20140150761A1
- Status: Published application
- Kind: A1
- Application number: 14/110,021
- Filed: 2012-02-28
- Published: 2014-06-05
- Earliest claimed: 2011-04-05
- Inventors: Wilhelm Blumendeller; Thomas Bleile
- Web page: https://patentgrep.com/patent/US20140150761A1

## CPC

- F02D 41/005: {according to engine operating conditions}
- F02D 41/0002: {Controlling intake air}
- F02D 41/0065: {Specific aspects of external EGR control (constructional details of EGR system F02M26/00)}
- F02D 41/1448: {the characteristics being an exhaust gas pressure}
- F02M 26/06: Low pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust downstream of the turbocharger turbine and reintroduced into the intake system upstream of the compressor
- F02D 2200/0406: Intake manifold pressure
- F02D 2200/703: Atmospheric pressure
- 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
- F02M 26/47: the characteristics being temperatures, pressures or flow rates
- Y02T 10/40: Engine management systems
- 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)
- F02M: SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

A drive system for a motor vehicle, having an internal combustion engine, an air and exhaust gas system, which includes at least one throttle, an exhaust gas recirculation system, which is in fluidic connection with the air and exhaust gas system at two connecting points, and a measuring device, which is designed to detect an atmospheric pressure, to detect a gas pressure at a measuring point within the air and exhaust gas system, and to ascertain a differential pressure as a function of the gas pressure and the atmospheric pressure, the measuring point being fluidically situated between the throttle and the internal combustion engine and in a region of one of the connecting points.

## Claims

### Claim at position 1

-9. (canceled)

### Claim 10

A drive system for a motor vehicle, comprising:
an internal combustion engine;
an air and exhaust gas system that includes at least one throttle;
an exhaust gas recirculation system in fluidic connection with the air and exhaust gas system at two connecting points; and
a measuring device adapted to:
detect an atmospheric pressure,
detect a gas pressure at a measuring point within the air and exhaust gas system, and
ascertain a differential pressure as a function of the gas pressure and the atmospheric pressure, wherein the measuring point is fluidically situated between the throttle and the internal combustion engine and in a region of one of the connecting points.

### Claim 11 (depends on 10)

The drive system as recited in claim 10, wherein:
the throttle is a fresh air throttle, and
one of the connecting points is a supply point situated between the fresh air throttle and the internal combustion engine.

### Claim 12 (depends on 11)

The drive system as recited in claim 11, wherein the measuring point is situated between the fresh air throttle and the supply point.

### Claim 13 (depends on 11)

The drive system as recited in claim 11, wherein:
the throttle is an exhaust gas throttle, and
one of the connecting points is a withdrawal point situated between the exhaust gas throttle and the internal combustion engine.

### Claim 14 (depends on 13)

The drive system as recited in claim 13, wherein the measuring point is situated between the exhaust gas throttle and the withdrawal point.

### Claim 15 (depends on 10)

The drive system as recited in claim 10, wherein:
the air and exhaust gas system includes a turbocharger, and
the connecting points are situated in a low-pressure region.

### Claim 16 (depends on 10)

The drive system as recited in claim 10, further comprising:
a control and evaluation unit for regulating a mass flow of an exhaust gas in the exhaust gas recirculation system as a function of the differential pressure.

### Claim 17 (depends on 10)

The drive system as recited in claim 10, wherein the measuring device is a differential pressure sensor.

### Claim 18

A method for operating a drive system for a motor vehicle that includes an internal combustion engine, an air and exhaust gas system that includes a throttle, and an exhaust gas recirculation system in fluidic connection with the air and exhaust gas system at two connecting points, the method comprising:
detecting an atmospheric pressure;
detecting a gas pressure within the air and exhaust gas system, the gas pressure being fluidically detected between the throttle and the internal combustion engine and in a region of one of the connecting points; and
ascertaining a differential pressure as a function of the gas pressure and the atmospheric pressure.