Method, computer program, and control and/or regulating device for operating an internal combustion engine

• US 6,708,103 B2
• Filed: 10/04/2001
• Issued: 03/16/2004
• Est. Priority Date: 10/04/2000
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Heinrich, Detlef, Wild, Ernst
• Primary Examiner(s): Wolfe, Willis R.
• Assistant Examiner(s): Hoang, Johnny H.
• Application Number:
  US09/970,498
• Publication Number:
  US 20020052683A1
• Time in Patent Office: 894 Days
• Field of Search: 701/107, 701/103, 701/104, 701/105, 123/406.11, 123/406.12, 123/339.11, 123/339.12, 123/425, 606/01
• US Class Current: 701/107
• CPC Class Codes: F02D 11/105 characterised by the function converting demand to actuation, e.g. a map indicating relations between an accelerator pedal position and throttle valve opening or target engine torque
• CPC Class Codes: F02D 2200/0406 Intake manifold pressure
• CPC Class Codes: F02D 23/02 the engines being of fuel-injection type
• CPC Class Codes: F02D 37/02 one of the functions being ignition
• CPC Class Codes: F02D 41/0007 for control of turbo-charged or super-charged engines control of the pumps per se F02B37/12
• CPC Class Codes: F02D 41/187 using a hot wire flow sensor
• CPC Class Codes: F02D 41/22 Safety or indicating devices for abnormal conditions in air/fuel ratio feedback systems F02D41/1495, in electric control linkage F02D11/107, in purge control systems F02M25/0809
• CPC Class Codes: Y02T 10/12 Improving ICE efficiencies

Abstract

Controlling an internal combustion engine which has an additional component provided in its exhaust gas conduit including a turbine and turbo of a turbo charger, includes enriching a mixture at a high throughput, determining a main filling signal by a main filling signal sensor and a substitute filling signal by a substitute filling sensor, converting the substitute filling signal into a control signal for at least one value selected from the group consisting of an air supply, a fuel supply and an ignition time point, such that the substitute filling signal is greater than the main filling signal by at least one protective factor, and selecting the protective factor so that at high throughput a change of the mixture toward a fattening is performed.

Claims

1. A method of controlling an internal combustion engine which has an additional component provided in its exhaust gas conduit, the method comprising the steps of enriching a mixture at a high throughput, determining a main filling signal by a main filling signal sensor and a substitute filling signal by a substitute filling sensor, converting the substitute filling signal into a control signal for at least one value selected from the group consisting of an air supply, a fuel supply and an ignition time point, when said substitute filling signal is greater than the main filling signal by at least one protective factor;

and selecting the protective factor so that at high throughput a change of the mixture toward a fattening is performed.

2. A method as defined in claim 1;

and further comprising recognizing the main signal as defective when the main signal is different from the substitute filling signal by at least one error factor; and

converting the substitute filling signal instead of the main filling signal into a control signal for at least one value selected from the group consisting of an air supply, a fuel supply and an ignition time point; and

selecting the protective factor substantially smaller than the error factor.

3. A method as defined in claim 1;

and further comprising selected the error factor in a region of +/−

25%.

4. A method as defined in claim 1;

and further comprising selecting the protective factor in the region of +5%.

5. A method as defined in claim 1;

and further comprising obtaining the main filling signal from a heating wire air mass measuring sensor.

6. A method as defined in claim 1;

and further comprising obtaining the substitute filling signal from an element selected from the group consisting of a position signal of a throttle flap, and rotary speed sensor, and a pressure sensor in a suction pipe.

7. A computer program which is formed for performing a method of controlling an integral combustion engine which has an additional component provided in its exhaust gas conduit, the method comprising the steps of enriching a mixture at a high throughput, determining a main filling signal by a main filling signal sensor and a substitute filling signal by a substitute filling sensor, converting the substitute filling signal into a control signal for at least one value selected from the group consisting of an air supply, a fuel supply and an ignition time point, when said substitute filling signal is greater than the main filling signal by at least one protective factor;

and selecting the protective factor so that at high throughput a change of the mixture toward a fattening is performed.

8. A computer program as defined in claim 7, wherein the computer program is stored in a storage formed as flash memory.

10. A device as defined in claim 8;

and further comprising means for recognizing, the main filling signal as defective and converting the substitute filling signal instead of the main filling signal into a control signal for at least one value selected from the group consisting of air supply, fuel supply and ignition time point with the protective factor being substantially smaller than the error factor when the main filling signal exceeds the substitute filling signal by at least one error factor.

9. A device selected from the group consisting of a control device and a regulating device for operating an internal combustion engine which has an additional component provided in its exhaust gas conduit, the device comprising means for enriching a mixture at a high throughput, means for determining a main filling signal by a main filling signal sensor and a substitute filling signal by a substitute filling sensor, means for converting the substitute filling signal into a control signal for at least one value selected from the group consisting of an air supply, a fuel supply and an ignition time point, when said substitute filling signal is greater than the main filling signal by at least one protective factor;

and means for selecting the protective factor so that at high throughput a change of the mixture toward a fattening is performed.