초록 ▼

An apparatus which permits the automated diagnosis of automobile engine electrical system waveform patterns is disclosed. Employed in conjunction with an addressable random access memory which stores digitized information concerning the waveform are further means which logarithmically reduce input a

An apparatus which permits the automated diagnosis of automobile engine electrical system waveform patterns is disclosed. Employed in conjunction with an addressable random access memory which stores digitized information concerning the waveform are further means which logarithmically reduce input amplitude values of the waveform and coordinates sampling times for the waveform with engine RPM so that the memory capacity is fully utilized. Input conversion of the waveform is accomplished by a tracking analog-to-digital converter using comparator means which also provides a waveform peak detector. Upon an address command, the memory output is input into a read only memory which provides an anti-log conversion of the logarithmic value stored in the memory, thereby providing an output corresponding to an actual value signal.

대표청구항 ▼

Apparatus for electrically storing substantially a time-varying operating parameter of an internal combustion engine comprising: electrical signal means adapted to be coupled to the engine for providing a time-varying electrical signal related to the time-varying operating parameter, converting mean

Apparatus for electrically storing substantially a time-varying operating parameter of an internal combustion engine comprising: electrical signal means adapted to be coupled to the engine for providing a time-varying electrical signal related to the time-varying operating parameter, converting means coupled to the electrical signal means for converting the time-varying electrical signal to a series of digital signals representing discrete magnitudes of the time-varying electrical signal at temporally spaced intervals, storing means coupled to the converting means for storing digital signals, and control means coupled to the storing means for causing digital signals from the converting means representing discrete magnitudes of the time-varying electrical signal at temporally spaced intervals which are determined by the control means in accordance with an operating parameter of the internal combustion engine other than said time-varying operating parameter being electrically stored; to be stored in said storing means, and for causing reading of the stored digital signals out of the storing means.