Method and apparatus for processing and display of diesel injection waveform
First Claim
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1. An apparatus for sensing and reporting a synchronizing event from a diesel engine, comprising:
- an engine analyzer with input ports, said analyzer being capable of responding to the signals applied to its input ports;
a transducer to convert a sensed transient physical phenomenon into an electrical signal; and
a signal conditioner to transform the output electrical signal of a transducer into a signal at a level compatible with an input into said engine analyzer.
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Abstract
A signal processing apparatus for detecting and displaying the properties of diesel fuel powered compression-ignition engines senses strain pulses in the fuel injection rail structure to perform a variety of testing functions. Among other capabilities, the apparatus permits the user to establish stroboscope timing, to measure engine RPM, to view the relationship between crankshaft position and injection time, and to examine the time-dependent properties of strain pulses on individual fuel injectors in order to evaluate the condition of the diesel engine.
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Citations
22 Claims
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1. An apparatus for sensing and reporting a synchronizing event from a diesel engine, comprising:
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an engine analyzer with input ports, said analyzer being capable of responding to the signals applied to its input ports;
a transducer to convert a sensed transient physical phenomenon into an electrical signal; and
a signal conditioner to transform the output electrical signal of a transducer into a signal at a level compatible with an input into said engine analyzer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13)
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11. The apparatus of claim 11, where said engine analyzer further comprises an embedded software sequence directing a storage element of said engine analyzer to record the impinging transient signal as a sequence of sampled voltage elements at a selectable sampling rate.
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14. An apparatus for sensing and incorporating a synchronizing event from a diesel engine into an engine analyzer, comprising:
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means for sensing transient mechanical strain events in a tube;
means for converting a detected strain event from a mechanical to an electrical phenomenon;
means for amplifying and conditioning an electrical phenomenon into a conventional electrical signal comparable to one normally used to provide an input to a unit of engine test apparatus;
means for recognizing within a unit of engine test apparatus a signal originating from a transient mechanical strain; and
means for displaying within a unit of test apparatus a signal originating from a transient mechanical strain. - View Dependent Claims (15, 16, 17, 18)
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19. A method for sensing and incorporating a synchronizing event from a diesel engine into an engine analyzer, comprising:
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sensing transient mechanical strain events in a metallic tube carrying motor fuel;
converting a detected transient strain event from a mechanical to an electrical phenomenon;
adjusting the amplitude and source impedance of a transient electrical phenomenon to correspond to those characteristics as observable in an electrical signal normally used to provide an input to a unit of engine test apparatus. - View Dependent Claims (20, 21, 22)
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Specification