Apparatus for sensing the engine parameters of an internal combustion engine
First Claim
1. An apparatus for controlling ignition timing or the fuel-air ratio of an internal combustion engine, said apparatus comprising:
- at least one optical sensor for detecting light emission caused by combustion in a combustion chamber of said internal combustion engine;
at least one photo sensor in optical communication with said optical sensor for converting said light emission into electrical signals; and
a processing apparatus comprising an apparatus for determining a maximum value of said light emission from said electrical signals, said processing apparatus providing an electrical output signal representative of the absolute value of said maximum value of said light emission, said output signal being supplied to an input of a controller for controlling said ignition timing or fuel-air ratio in dependence of said output signal.
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Accused Products
Abstract
An arrangement for determining the parameters of an internal combustion engine, in particular an Otto engine operating with gaseous fuels, has at least one optical sensor for observing the emission of light caused by the combustion in a combustion chamber of the internal combustion engine and at least one photodetector for converting the light emitted into electric signals which are processed in an evaluation unit. In order to achieve a rapid and accurate regulation, the evaluation unit has an arrangement for determining the maximum or mean intensity of the light emitted during each combustion cycle on the basis of the corresponding electric signal. The evaluation unit further has a regulating unit which regulates at least one engine parameter depending on the intensity maxima.
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Citations
11 Claims
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1. An apparatus for controlling ignition timing or the fuel-air ratio of an internal combustion engine, said apparatus comprising:
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at least one optical sensor for detecting light emission caused by combustion in a combustion chamber of said internal combustion engine; at least one photo sensor in optical communication with said optical sensor for converting said light emission into electrical signals; and a processing apparatus comprising an apparatus for determining a maximum value of said light emission from said electrical signals, said processing apparatus providing an electrical output signal representative of the absolute value of said maximum value of said light emission, said output signal being supplied to an input of a controller for controlling said ignition timing or fuel-air ratio in dependence of said output signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification