Ignition coil with overvoltage protection connected to the secon

Details Ignition coil with overvoltage protection connected to the secon Ignition coil with overvoltage protection connected to the secon

1980-10-01

1982-09-28

Nelli, Raymond A.

Internal-combustion engines

High tension ignition system

Current or voltage sensing in coil primary

123630, 123627, F02P 1100, F02P 100

Patent

active

043513107

ABSTRACT:
An overvoltage protection circuit is galvanically, directly connected across at least part of the secondary winding in the ignition system of an internal combustion engine. The input portion of the overvoltage protection circuit is a voltage divider preferably constituted by RC elements. The voltage at the tap of the voltage divider is applied to a Schmitt trigger. When the voltage across the secondary winding becomes excessively high, the Schmitt trigger output pulse triggers a monostable multivibrator whose output pulse in turn increases the conductivity of a transistor switch located in series with the primary. The increase in primary current tends to oppose further increases in primary and secondary voltages. Alternatively, the output from the multivibrator could be used to shorten the time of current flow in the primary winding in subsequent ignition time intervals or to completely block any subsequent ignition process.

REFERENCES:
patent: 3938490 (1976-02-01), Snyder et al.
patent: 3949722 (1976-04-01), Linstedt et al.
patent: 4114582 (1978-09-01), Rabus et al.
patent: 4196711 (1980-04-01), Daumer
patent: 4244344 (1981-01-01), Werner et al.
patent: 4246881 (1981-01-01), Bodig
patent: 4290406 (1981-09-01), Iyoda et al.

Affiliated with

Also associated with

Rating

Ignition coil with overvoltage protection connected to the secon 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 coil with overvoltage protection connected to the secon, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ignition coil with overvoltage protection connected to the secon will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-395605