Real time pressure signal system for a rotary engine

Details Real time pressure signal system for a rotary engine Real time pressure signal system for a rotary engine

1982-02-19

1984-01-31

Goldberg, Gerald

Measuring and testing

Vehicle drive train

Rear end

364558, G01M 1500

Patent

active

044282265

ABSTRACT:
A real-time IMEP signal which is a composite of those produced in any one chamber of a three-lobed rotary engine is developed by processing the signals of four transducers positioned in a Wankel engine housing such that the rotor overlaps two of the transducers for a brief period during each cycle. During the overlap period of any two transducers, their output is compared and sampled for 10.mu. seconds per 0.18.degree. of rotation by a sampling switch and capacitive circuit. When the switch is closed, the instantaneous difference between the value of the transducer signals is provided while with the switch open the average difference is produced. This combined signal, along with the original signal of the second transducer, is fed through a multiplexer to a pressure output terminal. Timing circuits, controlled by a crank angle encoder on the engine, determine which compared transducer signals are applied to the output terminal and when, as well as the open and closed periods of the switches.

REFERENCES:
patent: 4094190 (1978-06-01), Jindrick
patent: 4111041 (1978-09-01), Rice

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