Test apparatus for testing internal combustion engine electronic spark ignition systems
First Claim
1. A test apparatus for testing internal combustion engine electronic spark ignition systems of the kind referred to, comprising first means for detecting the instant of interruption of primary current, second means for detecting the commencement of current flow through the primary winding and third means receiving inputs from both said first means and said second means and producing an output pulse indicating a satisfactory operation of the system if said second means does not detect commencement of current flow within a predetermined time after said first means detects interruption of primary current.
1 Assignment
0 Petitions
Accused Products
Abstract
A test apparatus for testing electronic ignition systems includes a circuit for detecting the interruption of ignition coil primary current and triggering a 100 μS monostable. A coil current detector detects when coil current flow is recommenced and the signals from this detector and the monostable are combined via a gate to indicate satisfactory operation if the detector detects current re-commencement within 100 μS of the previous current interruption.
-
Citations
7 Claims
- 1. A test apparatus for testing internal combustion engine electronic spark ignition systems of the kind referred to, comprising first means for detecting the instant of interruption of primary current, second means for detecting the commencement of current flow through the primary winding and third means receiving inputs from both said first means and said second means and producing an output pulse indicating a satisfactory operation of the system if said second means does not detect commencement of current flow within a predetermined time after said first means detects interruption of primary current.
Specification