Method for graphically displaying vehicle test data
First Claim
1. A method of automatically graphically displaying, on a display screen, emission test data collected and stored by an engine analyzer, the method comprising the engine analyzer performed steps of:
- generating and displaying on the screen at least one time-based first waveform representative of gas emission output levels of at least one selected ingredient gas, which levels are collected, measured and stored by the analyzer during a first emission test; and
generating and displaying on the screen, superimposed over said at least one first waveform, at least one second time-based waveform representative of gas emission output levels of said at least one selected ingredient gas, which levels are collected by the analyzer during a second emission test.
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Accused Products
Abstract
A method and apparatus is provided for graphically displaying gas emission levels of certain selected ingredients of an exhaust gas collected by an engine analyzer system during a 240-second emission test. The emission levels are variable with the speed of the vehicle under test. The graphic display may further include a waveform showing the maximum allowable gas concentration levels of a selected ingredient gas. Additionally, where a number of tests have been taken, the first, previous and last concentration level waveforms may be simultaneously displayed (using different line hashings or colors) for communicating comparison information to the technician. Finally, the technician may selectively display, in graphical form, a speed-correlation waveform (actual or ideal). Speed and gas emission levels are displayed on appropriate y-axes located on opposite sides of the graph. Additionally, all waveforms are auto-scaled to facilitate ease of reading.
25 Citations
20 Claims
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1. A method of automatically graphically displaying, on a display screen, emission test data collected and stored by an engine analyzer, the method comprising the engine analyzer performed steps of:
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generating and displaying on the screen at least one time-based first waveform representative of gas emission output levels of at least one selected ingredient gas, which levels are collected, measured and stored by the analyzer during a first emission test; and generating and displaying on the screen, superimposed over said at least one first waveform, at least one second time-based waveform representative of gas emission output levels of said at least one selected ingredient gas, which levels are collected by the analyzer during a second emission test. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of automatically graphically displaying, on a display screen, emission test data collected and stored by an engine analyzer, the method comprising the engine analyzer performed steps of:
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generating and displaying on the screen at least one time-based first waveform representative of gas emission output levels of at least one selected ingredient gas, which levels are collected, measured and stored by the analyzer during a first emission test; and generating and displaying on the screen, superimposed over said at least one first waveform, a speed-correlation drive-trace waveform representative of one of an actual and an ideal drive trace of the relative speed of the vehicle at appointed time intervals during the first emission test. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. An apparatus for automatically graphically displaying vehicle emission related data on an engine analyzer display screen, comprising:
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means for generating and displaying on the screen at least one time-based first waveform representative of gas emission output levels of at least one selected ingredient gas, which levels are collected, measured and stored by the analyzer during a first emission test; and means for generating and displaying on the screen, superimposed over said at least one first waveform, a speed-correlation drive-trace waveform representative of one of an actual and an ideal drive trace of the relative speed of the vehicle at appointed time intervals during the first emission test. - View Dependent Claims (20)
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Specification