Method and arrangement for controlling the quiet running of an internal combustion engine

• US 6,209,519 B1
• Filed: 12/17/1999
• Issued: 04/03/2001
• Est. Priority Date: 12/21/1998
• Status: Expired due to Fees

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Melchior, Gerard, Ries-Muller, Klaus
• Primary Examiner(s): SOLIS, ERICK R
• Application Number:
  US09/466,978
• Time in Patent Office: 473 Days
• Field of Search: 123/435, 123/406.24, 123/403.26, 123/406.27, 123/436, 701/111
• US Class Current: 123/406.24
• CPC Class Codes: F02B 75/06 Engines with means for equalising torque
• CPC Class Codes: F02D 2200/1015 Engines misfires
• CPC Class Codes: F02D 41/0085 Balancing of cylinder outputs, e.g. speed, torque or air-fuel ratio
• CPC Class Codes: F02D 41/1497 With detection of the mechanical response of the engine
• CPC Class Codes: F02D 41/1498 measuring engine roughness
• CPC Class Codes: F16F 15/22 Compensation of inertia forces suppression of vibrations of rotating systems by favourable grouping or relative arrangements of the moving members of the system or systems F16F15/20, counterweights F16F15/28; correcting-weights for balancing rotating bodies F16F15/32

Abstract

The invention is directed to a method and an arrangement for equalizing torque contributions of different cylinders of an internal combustion engine to the total torque of the engine. The engine can operate in an overrun mode and in a fired mode. First quantities (Ka) are provided of a rough running of the engine in the overrun mode and second quantities (Kvi) are provided in the fired mode. Third quantities (Ksi) for a rough-running component based on torsion vibrations are also provided. Cylinder-individual fourth quantities (Kki) for the rough running are formed from the first, second and third quantities with the fourth quantities being independent of the rough running in the overrun mode and independent of the rough-running component based on the torsion vibrations. The torque contributions are equalized on the basis of the fourth quantity.

Claims

1. An electronic control arrangement for equalizing torque contributions of different cylinders of an internal combustion engine to the total torque of the engine which can operate in an overrun mode and in a fired mode, the electronic control arrangement comprising:

means for providing first quantities (Ka) of a rough running of said engine in said overrun mode and second quantities (Kvi) in said fired mode;

means for providing third quantities (Ksi) for a rough-running component based on torsion vibrations;

means for forming cylinder-individual fourth quantities (Kki) for said rough running from said first, second and third quantities with said fourth quantities being independent of the rough running in said overrun mode and independent of the rough-running component based on said torsion vibrations; and

,

means for equalizing said torque contributions on the basis of said fourth quantity.

2. The electronic control arrangement of claim 1, wherein said engine includes actuator means for operating on at least one of the following functions thereof:

fuel metering to said engine, air supplied to said engine, the ignition, cylinder compression, drive of camshaft valves and drive of a swirl flap;

the electronic control arrangement further comprising;

a plurality of controllers corresponding individually to respective ones of said cylinders; and

,

means for conducting said fourth quantities to said controllers wherein drive signals are formed for said actuator means to thereby intervene in at least one of said functions.

3. The electronic control arrangement of claim 2, wherein said arrangement functions to intervene individually or in combination as follows in dependence upon the deviations which occur on said engine:

extending the injection time of those ones of said cylinders which output less torque while simultaneously shortening the injection time of those ones of said cylinders which output more torque with the extending and shortening being so computed that the total quantity of fuel is unaffected and the lambda value of the mixture with which said engine is driven is not changed;

first compensating a torque which is too low by an advanced ignition angle;

with a system having exhaust-gas recirculation, reducing the rate of recirculating of the exhaust gas in the event that measured values fluctuate greatly;

with a system having variable control of the gas exchange valves, the control lines and/or the valve stroke is changed;

with a system having a charge movement flap, the position of the charge movement flap is changed;

with a system having a variable compression, the cylinder compression is changed;

with a system having a variable camshaft adjustment, the position and elevation of the inlet valve is changed; and

,

with a system having a swirl flap, the position of the swirl flap is changed.

4. The electronic control arrangement of claim 1, wherein said engine is a direct-injection spark-ignition engine or a diesel engine in stratified operation;

and, the outputted torque is changed by varying the time point of injection.

5. The electronic control arrangement of claim 1, wherein said means for providing said first quantities (Ka) and said second quantities (Kvi) are adapted to detect the torque of said engine.

6. A method for equalizing torque contributions of different cylinders of an internal combustion engine to the total torque of the engine which can operate in an overrun mode and in a fired mode, the method comprising the steps of:

providing first quantities (Ka) of a rough running of said engine in said overrun mode and second quantities (Kvi) in said fired mode;

providing third quantities (Ksi) for a rough-running component based on torsion vibrations;

forming cylinder-individual fourth quantities (Kki) for said rough running from said first, second and third quantities with said fourth quantities being independent of the rough running in said overrun mode and independent of the rough-running component based on said torsion vibrations; and

,

equalizing said torque contributions on the basis of said fourth quantity.

7. The method of claim 6, wherein said engine includes actuator means for operating on at least one of the following functions thereof:

fuel metering to said engine, air supplied to said engine, the ignition, cylinder compression, drive of camshaft valves and drive of a swirl flap; and

, wherein the method comprises the further steps of;

providing a plurality of controllers corresponding individually to respective ones of said cylinders; and

, conducting said fourth quantities to said controllers wherein drive signals are formed for said actuator means to thereby intervene in at least one of said functions.

8. The method of claim 7, wherein the method provides for intervening individually or in combination as follows in dependence upon the deviations which occur on said engine:

extending the injection time of those ones of said cylinders which output less torque while simultaneously shortening the injection time of those ones of said cylinders which output more torque with the extending and shortening being so computed that the total quantity of fuel is unaffected and the lambda value of the mixture with which said engine is driven is not changed;

first compensating a torque which is too low by an advanced ignition angle;

with a system having exhaust-gas recirculation, reducing the rate of recirculating of the exhaust gas in the event that measured values fluctuate greatly;

with a system having variable control of the gas exchange valves, changing the control lines and/or the valve stroke;

with a system having a charge movement flap, changing the position of the charge movement flap;

with a system having a variable compression, changing the cylinder compression;

with a system having a variable camshaft adjustment, changing the position and elevation of the inlet valve; and

, with a system having a swirl flap, changing the position of the swirl flap.

9. The method of claim 6, wherein said engine is a direct-injection spark-ignition engine or a diesel engine in stratified operation;

and, the outputted torque is changed by varying the time point of injection.