Ignition circuit for an internal combustion engine

Details Ignition circuit for an internal combustion engine Ignition circuit for an internal combustion engine

1994-08-03

1995-09-05

Nelli, Raymond A.

Internal-combustion engines

Engine speed regulator

Engine speed reduction by partial or complete omission of...

F02P 900

Patent

active

054471311

ABSTRACT:
The invention is directed to an ignition circuit for an internal combustion engine in a portable handheld work apparatus wherein a work tool is driven via a clutch. The ignition circuit includes an ignition time point control which connects a spark plug via a switch to a voltage source in order to trigger an ignition spark. The spark plug is mounted in the combustion chamber of the engine. This connection takes place in dependence upon the crankshaft angle and the rpm of the engine. In order to prevent damage to the clutch because of a blocked work tool, a test value counter driven via a rpm gate circuit is provided. The test value counter increments its value in the pregiven rpm window of the gate circuit with each rotation of the crankshaft and the content of the test value counter is compared to a pregiven limit value by a comparator. The output of the comparator activates a rpm-reducing protective circuit and the output of the comparator indicates reaching or exceeding the limit value.

REFERENCES:
patent: 4812671 (1989-03-01), Furrow
patent: 4979477 (1990-12-01), Nickel et al.
patent: 5105783 (1992-04-01), Nussbaum et al.
patent: 5138996 (1992-08-01), Fiorenza, II
patent: 5208519 (1993-05-01), Dykstra et al.
patent: 5245965 (1993-09-01), Andersson
patent: 5385128 (1995-01-01), Kratt et al.

Affiliated with

Also associated with

Rating

Ignition circuit for an internal combustion engine does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Ignition circuit for an internal combustion engine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ignition circuit for an internal combustion engine will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-466974