Engine timing instrument

Details Engine timing instrument Engine timing instrument

1982-03-12

1984-04-10

Myracle, Jerry W.

Measuring and testing

Internal combustion engine or related engine system or...

Compression

324392, G01M 1500

Patent

active

044413602

ABSTRACT:
An engine timing instrument as disclosed which is particularly designed for use with diesel engines and which responds to the actual time of firing within a cylinder. A strobe may be flashed at the crankshaft angle at which firing occurs and the crankshaft of the strobe flash may be advanced with respect to the firing angle until the strobe flash occurs at a top dead center position. The angle of advance of the strobe flash is measured to then indicate the angle of firing relative to the top dead center position. Important features relates to the use of a piezoelectric transducer placed in a glow plug hole to measure pressure, the transducer being connected to circuitry which provides both a firing pulse and a reference pulse. The reference pulse occurs close to and not later than the top dead center position and is used to measure the time of a subsequent firing pulse. Electronic circuitry is provided for counting and storing clock pulses and performing digital operations in a manner such as to obtain a high degree of accuracy.

REFERENCES:
patent: Re28904 (1976-07-01), Maisonville
patent: 4373384 (1983-02-01), Olson et al.

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