JP2009275707A5

JP2009275707A5 -

Info

Publication number: JP2009275707A5
Application number: JP2009118165A
Authority: JP
Filing date: 2009-05-15
Publication date: 2012-07-12
Anticipated expiration: 2029-05-15

Claims

In a control method of an internal combustion engine (1000) in which fuel is injected into a combustion chamber (1075) for combustion by a first injection valve (1040) and a second injection valve (1045),
a) a step of first injection scheduled fuel quantity is set,
b) the first target value of the first control signal (205) (S1) is assigned by the interpolation to the first injection scheduled fuel quantity by the first allocation rule, the follow the first allocation rule (Z1) a step of pre-Symbol first injection valve (1040) is controlled to inject a first injection scheduled fuel quantity,
c) Before Symbol the first injection valve in step b) (first actual first actual value of the driving characteristic of the internal combustion engine resulting from the combustion (1000) in the amount of fuel (q1) which is injected by the control of the 1040) (11) the steps are required,
a step of d) a second injection scheduled fuel quantity is set,
e) the first injection valve (1040) is controlled to inject the first injection scheduled fuel quantity, the second control signal to said second injection scheduled fuel quantity by the second allocation rule (Z2) (225 second target value) (S2) is allocated by the interpolation, the second injection valve (1045) is control to morphism injection pre Symbol second injection scheduled fuel amount in accordance with the second assignment rule (Z2) and the steps to be your,
f) second actual value (12), the first actual fuel amount injected by the control of the first injection valve in step e) (1040) and (q1), the said in step e) first a step obtained from the driving characteristic quantity of the injected second actual fuel quantity (q2) and the internal combustion engine resulting from the combustion of (1000) under the control of the second injection valve (1045),
and step g) the deviation between the first actual value (11) the second actual value (12) (A) is obtained,
h) corrected second assignment rules of the deviation (the second injection valve based on A) (1045) (Z2korr) is determined, the corrected second by Ri before Symbol second to allocation rules a step of second target value of the control signal (225) (S2) is assigned to the deviation (a),
A method comprising the steps of:

The method of claim 1, comprising:
A method of repeating at least one of steps d) to h) at least once.

The method according to claim 1 or 2, comprising:
Step d) from h) repeatedly, in performing the steps d) h) the first, selects the first value for the second injection scheduled fuel quantity,
When repeated at least once h) from the step d), a method for changing the second injection scheduled fuel quantity by a predetermined magnitude in said step d).

The method of claim 3, comprising:
Obtaining a value pair of the second allocation rule (Z2Korr) corrected in step h);
Method of repeating the steps d) to h), until the number of value pairs of step h) in sought corrected second allocation rule (Z2Korr) is obtain ultra the first predetermined number.

The method of claim 4, comprising:
Wherein the first predetermined number, the second injection scheduled fuel quantity of the maximum value to be realized by the second injection valve (1045) in an internal combustion engine (1000), corrected second allocation rule (Z2Korr) Depending on the desired resolution and / or the measurement accuracy of the measuring device used to detect the drive characteristic quantity of the internal combustion engine (1000).

A method according to any one of claims 3 to 5, comprising
Even without least one of said predetermined size repeatedly change the pre-Symbol second injection scheduled fuel amount during is corrected second target resolution and / or the internal combustion engine of the allocation rules (Z2Koprr) ( 1000) a method that is varied depending on the measurement accuracy of the measuring device used to detect the drive characteristic quantity.

A method according to any one of claims 1 to 6, comprising:
Wherein the second allocation rule (Z2) is a valve characteristic curve, the method to be stored in the memory unit (1013) of the control device (1005).

A method according to any one of claims 1 to 7, comprising
The corrected first as the second allocation rule (Z2Korr) characteristic curve, a method that is stored in the memory unit (1013) of the control device (1005).

A method according to any one of claims 1 to 8, comprising
The corrected second allocation rule (Z2Korr) replaces the second allocation rule (Z2).

A method according to any one of claims 1 to 9, comprising:
i) following the second target value the second injection valve (1045) of the internal combustion engine (1000) (S2), in dependence on the said corrected in step h) a second allocation rule (Z2Korr) Interpolation Step controlled by
Additionally having a method.

A method according to any one of claims 2 to 10, comprising
Method when you first run the steps d) h) until the first value to the second injection scheduled fuel quantity not exceeding a predetermined first threshold value.

The method of claim 11, comprising:
When first run the steps d) h) until the first value to the second injection scheduled fuel quantity not exceed a predetermined first threshold value,
H) from the step d), the deviation (A) is repeated to above a predetermined second threshold value,
In this case, the second scheduled fuel injection amount is increased by a predetermined magnitude when the step d) is repeated at least once.

A method according to any one of claims 2 to 10, comprising
Method when the first run from the step d) h) until the first value to the second injection scheduled fuel quantity above a predetermined first threshold value.

14. The method of claim 13, comprising
When first run the steps d) h) until the first value to the second injection scheduled fuel quantity exceeds a predetermined first threshold value,
H) from the step d), the deviation (A) is repeated to below a predetermined second threshold value,
The second injection will fuel amount at this time, how is decreased by a predetermined magnitude when repeating at least once the step d).

15. A method according to any one of claims 1 to 14,
The drive characteristic amount produced by the internal combustion engine (1000) is the oxygen concentration of the exhaust gas of the internal combustion engine (1000).

The method according to any one of claims 1 to 15, wherein
The detection of the first actual value (11) of the drive characteristic quantity of the internal combustion engine (1000) and the detection of the second actual value (12) of the drive characteristic quantity depend on parameters representing the combustion cycle of the internal combustion engine. Switched
The method wherein the combustion cycle includes at least one combustion step.

The method according to any one of claims 1 to 16, wherein
The first actual value (11) and the second actual value (12) of the drive characteristic quantity of the internal combustion engine (1000) are detected between the first time point and the second time point during the combustion cycle of the internal combustion engine. ,
The first time point and the second time point are determined depending on a parameter representing a combustion cycle of the internal combustion engine (1000) .

The method of claim 17, comprising:
The first time point and the second point in time between the time point and the second point in time of those first, after the combustion exhaust gas from the combustion chamber (1075), the driving characteristics arranged on the inner combustion engine A method determined at such a time as to enter a measuring device (1070) for detecting the quantity.

19. A method according to any one of claims 16 to 18, comprising
Method wherein the parameters representing the combustion cycle of the internal combustion engine (1000) are crankshaft angle and / or rotational speed of the internal combustion engine.

A method according to any one of claims 1 to 19, comprising
The first control signal (205) of the first injection valve (1040) is a first electric control duration (t1), and the second control signal (225) of the second injection valve (1045) is a second electric control duration (t1). The method is a static control duration (t2).

21. The method according to any one of claims 1 to 20, comprising:
The deviation (A) is an excess fuel amount.

A control device for controlling an internal combustion engine (1000),
A first setting unit (1010) for setting the first fuel injection scheduled fuel amount;
- first threshold value of the first control signal (205) (S1) is assigned to a first of the first injection scheduled fuel quantity by allocation rules (Z1), a first injection valve (1040) the first allocation rules ( A first control unit (1011) for controlling according to Z1),
A second setting unit (1015) for setting the second fuel injection scheduled fuel amount;
- second threshold of the second control signal (225) (S2) is allocated to the second second injection scheduled fuel quantity by allocation rules (Z2), second injection valve (1045) the second allocation rules ( A second control unit (1016) for controlling according to Z2),
A detection unit (1020) for detecting the first actual value (11) and the second actual value (12);
The first actual value (11) is obtained from the drive characteristic amount of the internal combustion engine (1000) resulting from the combustion of the first actual fuel amount (q1) injected by the control of the first injection valve (1040),
The second actual value (12) includes the first actual fuel amount (q1) injected by the control of the first injection valve (1040) and the second actual fuel injected by the control of the second injection valve (1045). Determined by the drive characteristic quantity of the internal combustion engine (1000) resulting from the combustion with the quantity (q2),
A first memory unit (1025) for storing the first actual value (11);
A second memory unit (1022) for storing the second actual value (12);
A comparison unit (1030) for detecting a deviation (A) between the first actual value (11) and the second actual value (12);
A second detection unit (1035) for detecting a corrected second allocation rule (Z2Korr) of the second injection valve (1045) based on the deviation (A) ;
The second threshold (S2) of the second control signal (225) is assigned to the deviation (A) according to the corrected second assignment rule (Z2Korr).
A control device characterized by that.

To come to be executed by the computing device or controller, the computer program for performing all the steps of any one claim of method claims 1 to 21.