Dwell measuring apparatus

Details Dwell measuring apparatus Dwell measuring apparatus

1978-11-13

1981-02-03

Karlsen, Ernest F.

Electricity: measuring and testing

Internal-combustion engine ignition system or device

Distributor

324392, G01R 2900

Patent

active

042491304

ABSTRACT:
A circuit for measuring the dwell angle of an engine ignition system having contact points which close to conduct current through a coil, i.e., dwell, and which open to generate an ignition signal. The primary ignition signal is monitored and shaped to form an output voltage level for comparison against a reference voltage level of a selected percentage of car battery voltage. During the time of dwell, the ignition signal's output voltage level is less than the reference voltage level causing a voltage comparator circuit to direct a relatively constant and independent current to a meter for visual display of the dwell time in terms of dwell angle. The extent of dwell angle displayed is determined by the ratio of the time period over which current is delivered to the metering circuit to the total time between spark plug firings, properly calibrated for the type of engine being tested.

REFERENCES:
patent: 4092584 (1978-05-01), Karlin
Wong, S. K., "VOM with Calibration Circuit . . . ", Electronics, Sep. 18, 1975, pp. 111-112.

Affiliated with

Also associated with

Rating

Dwell measuring apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Dwell measuring apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dwell measuring apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-552536