Method for electronically trimming for an injection apparatus
First Claim
1. An apparatus for electronically trimming a fluid injection pump of an interal combustion engine, the apparatus comprising:
- a fluid injection pump having a feed characteristic that at least substantially follows an at least third-order polynomial; and
an electronic control module, wherein the electronic control module determines parameters of a control signal for a type of influence.
8 Assignments
0 Petitions
Accused Products
Abstract
A method for electronic trimming of at least one fluid injection pump, in which a control signal which is corrected for injection pump operation and, preferably, a control signal which is corrected for engine operation as well are determined by a control module of an electronic control device and are used for operation of the fluid injection pump, and in which, furthermore, a fluid injection pump is used which operates on the energy storage principle and whose feed characteristic follows an at least third-order polynomial identically or at least largely approximately and the parameters are determined in predetermined standard conditions for an at least third-order standard polynomial, are stored and are used in the determination of the required fuel injection quantity.
12 Citations
18 Claims
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1. An apparatus for electronically trimming a fluid injection pump of an interal combustion engine, the apparatus comprising:
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a fluid injection pump having a feed characteristic that at least substantially follows an at least third-order polynomial; and
an electronic control module, wherein the electronic control module determines parameters of a control signal for a type of influence. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 10, 11, 12, 13, 14, 15, 16, 17, 18)
determining at least one X-Y shifted at least third-order correction polynomial having the same form of the at least third-order polynomial with a specific type of influence on the fluid injection pump; and
storing parameters of the at least one X-Y shifted at least third-order correction polynomial.
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11. The method as claimed in claim 1, further comprising:
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determining a corrected control signal, which is corrected for engine operation and is proportional to fluid quantity, a normal manner by a control module; and
assigning at least two control values for a type of influence by addition or subtraction to the corrected control signal, which control values are determined by the control module from the parameter of a standard polynomial and of a correction polynomial, from which the corrected control signal, which is proportional to the fluid quantity, results.
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12. The method as claimed in claim 1, further comprising:
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assigning one control value for a type of influence by multiplication; and
assigning a further control value for the type of influence by addition or subtraction to a corrected control signal, which is corrected for engine operation and is proportional to the fluid quantity, wherein the control values are determined by a control module from the parameters of a standard polynomial and of a correction polynomial.
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13. The method as claimed in claim 12, further comprising determining a time duration control signal for the corrected control signal.
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14. The method as claimed in claim 13, wherein the time duration control signal is used for operation of the fluid injection pump.
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15. The method as claimed in claim 1, further comprising:
producing a control signal Δ
X and Δ
Y values for a types of influence.
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16. The method as claimed in claim 1, further comprising:
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determining a standard feed characteristic in normal operating conditions, by;
measuring a feed rate for a number of specific different states of a type of influence, and defining parameters of a curve, corresponding to the different states.
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17. The method as claimed in claim 1,
wherein Δ - X and Δ
Y values for specific different states of a type of influence are defined and stored instead of the polynomial parameters.
- X and Δ
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18. The method as claimed in claim 1, further comprising:
computing a corresponding linear interpolation for intermediate states between either the parameters, if these are stored, or between stored Δ
X and Δ
Y values in a situation where Δ
X or Δ
Y values are stored.
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9. A method for electronic trimming of at least one fluid injection pump, comprising the steps of:
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a) operating a fluid injection pump having a feed characteristic that at least substantially follows an at least third-order polynomial;
b) and wherein parameters are determined in predetermined standard conditions for an at least third-order standard polynomial, and are stored and used in a determination of a required fuel injection quantity.
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Specification