Combustion prediction and discrimination apparatus for an internal combustion engine and control apparatus therefor
First Claim
1. A combustion prediction and discrimination apparatus for an internal combustion engine comprising:
- (a) means for detecting a crank angle to output a crank angle signal;
(b) means for detecting a cylinder pressure to output a cylinder pressure signal;
(c) means for selecting said cylinder pressure signal in correspondence with said crank angle signal detected in a part of the whole period of a burning condition to be predicted and discriminated; and
(d) means for predicting and discriminating the burning condition having a network constituted by multi-connected operational elements, such that each of said multi-connected operational elements;
(i) multiply each of a plurality of inputs to each of said multi-connected operational elements by weight;
(ii) add the multiplied results; and
(iii) output a non-linear transformation of the sum,wherein said weight is determined to cause the final output of said network to correspond to the burning condition to be predicted and discriminated on the basis of the information of said selected cylinder pressure signal, whereby the burning condition is predicted and discriminated on the basis of the magnitude of the final output obtained by one part of said cylinder pressure signal in correspondence with said crank angle signal.
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Accused Products
Abstract
An apparatus for predicting and discriminating whether or not misfire, knocking and the like will occur from the cylinder pressure before the occurrence of the misfire, the knocking and the like by the use of a three layered neural network. The cylinder pressure signal detected by a cylinder pressure sensor is sampled and input to each of the elements of the input layer. The signal then is modulated corresponding to the strength (weight) of the connection between each of the elements, and transmitted to the hidden and output layers. The magnitude of signal from the elements of the output layer represents the prediction and discrimination results. The weight is learned and determined by a back propagation method.
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Citations
19 Claims
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1. A combustion prediction and discrimination apparatus for an internal combustion engine comprising:
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(a) means for detecting a crank angle to output a crank angle signal; (b) means for detecting a cylinder pressure to output a cylinder pressure signal; (c) means for selecting said cylinder pressure signal in correspondence with said crank angle signal detected in a part of the whole period of a burning condition to be predicted and discriminated; and (d) means for predicting and discriminating the burning condition having a network constituted by multi-connected operational elements, such that each of said multi-connected operational elements; (i) multiply each of a plurality of inputs to each of said multi-connected operational elements by weight; (ii) add the multiplied results; and (iii) output a non-linear transformation of the sum, wherein said weight is determined to cause the final output of said network to correspond to the burning condition to be predicted and discriminated on the basis of the information of said selected cylinder pressure signal, whereby the burning condition is predicted and discriminated on the basis of the magnitude of the final output obtained by one part of said cylinder pressure signal in correspondence with said crank angle signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A control apparatus for an internal combustion engine comprising:
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(a) means for detecting a crank angle to output a crank angle signal; (b) means for detecting a cylinder pressure to output a cylinder pressure signal; (c) means for selecting said cylinder pressure signal in correspondence with said crank angle signal detected in a part of the whole period of a burning condition to be predicted and discriminated; and (d) means for predicting and discriminating the burning condition having a network constituted by multi-connected operational elements, such that each of said multi-connected operational elements; (i) multiply each of a plurality of inputs to each of said multi-connected operational elements by weight; (ii) add the multiplied results; and (iii) output a non-linear transformation of the sum, wherein said weight is determined to cause the final output of said network to correspond to the burning condition to be predicted and discriminated on the basis of the information of said selected cylinder pressure signal, whereby the burning condition is predicted and discriminated on the basis of the magnitude of the final output obtained by one part of said cylinder pressure signal in correspondence with said crank angle signal; and means for controlling an internal combustion engine based on the discriminated results of said prediction discrimination means. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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Specification