IP Library › Granted Patent US 6,959,539
Granted Patent B2
US 6,959,539 · App. 10/040,116 · Granted Nov 1, 2005

Exhaust-gas cleaning system for an internal-combustion engine

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Quick Facts
Patent No.
US 6,959,539
App. No.
10/040,116
Granted
Nov 1, 2005
Kind
B2
Abstract

An exhaust-gas cleaning system for an internal-combustion engine has an exhaust-gas cleaning element, a first exhaust-gas sensor located upstream from the exhaust-gas cleaning element, and a control unit with an input connected to a first exhaust-gas sensor. The output of the control unit is connected to an engine management system for controlling the composition of the mixture in the internal-combustion engine as a function of the exhaust-gas composition that is measured by the first exhaust-gas sensor. A second exhaust-gas sensor has an output connected to the control unit. The second exhaust-gas sensor is arranged in the exhaust-gas stream of the internal-combustion engine, and is arranged downstream of the exhaust-gas cleaning element. The second gas sensor enables the control unit to cause a modification of the local balance of the oxygen concentration in the exhaust-gas cleaning element.

Claims (30)

1. An exhaust-gas cleaning system for an internal-combustion engine having an exhaust-gas stream, comprising:

an engine management system for setting a composition of a mixture in the internal-combustion engine;

a first exhaust-gas sensor for measuring a composition of the exhaust-gas stream of the internal-combustion engine, said first exhaust-gas sensor configured in the exhaust-gas stream of the internal-combustion engine;

a first exhaust-gas cleaning element configured in the exhaust-gas stream of the internal-combustion engine, said first exhaust-gas cleaning element configured downstream from said first exhaust-gas sensor;

a control unit for controlling the composition of the mixture in the internal-combustion engine as a function of the composition of the exhaust-gas stream measured by said first exhaust-gas sensor, said control unit having an input connected to said first exhaust-gas sensor, said control unit having an output connected to said engine management system, and said control unit having two I-controllers connected in series, each one of said two I-controllers having a control response; and

a second exhaust-gas sensor configured in the exhaust-gas stream of the internal-combustion engine, said second exhaust-gas sensor configured downstream from said first exhaust-gas cleaning element, said second exhaust-gas sensor measuring the exhaust-gas composition of the exhaust-gas stream of the internal-combustion engine, and said second exhaust-gas sensor being connected to one of said two I-controllers to influence the control response of said one of said two I-controllers as a function of the exhaust-gas composition measured by said second exhaust-gas sensor;

said control unit having a control response and a control input for influencing the control response to modify a local balance of an oxygen concentration in said first exhaust-gas cleaning element; and

said control input of said control unit being connected to said second exhaust-gas sensor.

2. The exhaust-gas cleaning system according to claim 1 , comprising:

a second exhaust-gas cleaning element configured in the exhaust-gas stream of the internal-combustion engine, said second exhaust-gas cleaning element configured downstream from said second exhaust-gas sensor.

3. The exhaust-gas cleaning system according to claim 2 , wherein said second exhaust-gas cleaning element includes a catalytic converter.

4. The exhaust-gas cleaning system according to claim 3 , wherein said first exhaust-gas cleaning element includes a catalytic converter.

5. The exhaust-gas cleaning system according to claim 1 , wherein said first exhaust-gas cleaning element includes a catalytic converter.

6. The exhaust-gas cleaning system according to claim 1 , wherein said first exhaust-gas sensor is a lambda sensor.

7. The exhaust-gas cleaning system according to claim 6 , wherein said second exhaust-gas sensor is a lambda sensor.

8. The exhaust-gas cleaning system according to claim 1 , wherein said second exhaust-gas sensor is a lambda sensor.

9. The exhaust-gas cleaning system according to claim 1 , wherein said second exhaust-gas sensor is a binary lambda sensor.

10. The exhaust-gas cleaning system according to claim 9 , wherein said second exhaust-gas sensor is a binary lambda sensor.

11. The exhaust-gas cleaning system according to claim 1 , wherein said second exhaust-gas sensor is a binary lambda sensor.

12. The exhaust-gas cleaning system according to claim 1 , wherein said control unit includes a controller selected from the group consisting of a P-controller, an I-controller, a D-controller, and an I 2 -controller.

13. The exhaust-gas cleaning system according to claim 1 , wherein said control unit includes a P-controller, an I-controller, a D-controller, and I 2 -controller.

14. An exhaust-gas cleaning system for an internal-combustion engine having an exhaust-gas stream, comprising:

an engine management system for setting a composition of a mixture in the internal-combustion engine;

a first exhaust-gas sensor for measuring a composition of the exhaust-gas stream of the internal-combustion engine, said first exhaust-gas sensor configured in the exhaust-gas stream of the internal-combustion engine;

a first exhaust-gas cleaning element configured in the exhaust-gas stream of the internal-combustion engine, said first exhaust-gas cleaning element configured downstream from said first exhaust-gas sensor;

a control unit for controlling the composition of the mixture in the internal-combustion engine as a function of the composition of the exhaust-gas stream measured by said first exhaust-gas sensor, said control unit having an input connected to said first exhaust-gas sensor, said control unit having an output connected to said engine management system, and said control unit having two I-controllers connected in series, each one of said two I-controllers having a control response;

a second exhaust-gas sensor configured in the exhaust-gas stream of the internal-combustion engine, said second exhaust-gas sensor configured downstream from said first exhaust-gas cleaning element, said second exhaust-gas sensor measuring the exhaust-gas composition of the exhaust-gas stream of the internal-combustion engine, and said second exhaust-gas sensor being connected to one of said two I-controllers to influence the control response of said one of said two I-controllers as a function of the exhaust-gas composition measured by said second exhaust-gas sensor; and

a second exhaust-gas cleaning element configured in the exhaust-gas stream of the internal-combustion engine, said second exhaust-gas cleaning element configured downstream from said second exhaust-gas sensor;

said control unit having a control response and a control input for influencing the control response to modify a local balance of an oxygen concentration in said first exhaust-gas cleaning element; and

said control input of said control unit being connected to said second exhaust-gas sensor.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Aug 4, 2020
From: CONTINENTAL AUTOMOTIVE GMBH
To: VITESCO TECHNOLOGIES GMBH
Reel/Frame 053395/0584 →