Method for controlling and regulating combustion in the combustion chamber of an internal combustion engine

• US 6,408,819 B1
• Filed: 03/06/2000
• Issued: 06/25/2002
• Est. Priority Date: 09/06/1997
• Status: Expired due to Fees

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Mezger, Manfred, Bischof, Hubert
• Primary Examiner(s): Yuen, Henry C.
• Assistant Examiner(s): Gimie, Mahmoud
• Application Number:
  US09/508,070
• Time in Patent Office: 841 Days
• Field of Search: 123/406.29, 123/406.34, 123/406.35, 123/406.41, 73/350.1, 73/350.3, 73/350.4
• US Class Current: 123/406.29
• CPC Class Codes: F02D 35/024 using an estimation
• CPC Class Codes: F02D 35/027 using knock sensors
• CPC Class Codes: F02D 41/009 using means for generating position or synchronisation signals
• CPC Class Codes: F02D 41/1498 measuring engine roughness

Abstract

A method for controlling and regulating the combustion in the combustion chamber of an internal combustion engine, at least one knock sensor detecting a cylinder-specific knocking signal for each cylinder of the internal combustion engine, the knocking signal detected in this manner being fed to an evaluation circuit which reconstructs the combustion chamber pressure characteristic from the detected knocking signal, this combustion chamber pressure characteristic being evaluated for the control and regulation of the next combustion in this cylinder.

Claims

1. A method for controlling a combustion in a combustion chamber of an internal combustion engine, comprising the steps of:

detecting, with at least one knock sensor, a cylinder-specific knocking signal for each cylinder of the internal combustion engine;

transmitting the detected knocking signal to an evaluation circuit;

reconstructing, in the evaluation circuit, a combustion chamber pressure characteristic as a function of the detected knocking signal; and

evaluating the reconstructed combustion chamber pressure characteristic for controlling a next combustion in the cylinder.

2. The method according to claim 1, wherein the reconstructed combustion chamber pressure characteristic is evaluated for determining a phase angle.

3. The method according to claim 1, wherein the reconstructed combustion chamber pressure characteristic is evaluated for determining an irregular running.

4. The method according to claim 1, wherein the reconstructed combustion chamber pressure characteristic is evaluated for recognizing a misfiring.

5. The method according to claim 1, wherein the reconstructed combustion chamber pressure characteristic is evaluated for determining a combustion position.