Engine security system
First Claim
1. An engine security system for an internal combustion engine comprising a security device arranged to receive a sequence of timing pulses generated in dependence on the rotation of said engine, to generate an ignition pulse sequence synchronous with the rotation of the engine from said sequence of timing pulses on receipt of an enabling code, and to supply said sequence to an ignition system of said engine for the generation of ignition sparks, such that pulses in said timing pulse sequence occur at different times from pulses in said ignition pulse sequence.
1 Assignment
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Accused Products
Abstract
An engine security system includes a security device adapted to receive a sequence of timing pulses which is generated in dependence on the rotation of the engine. The device generates an ignition pulse sequence synchronous with rotation of the engine from the sequence of timing pulses on receipt of an enabling code. The ignition pulse sequence is supplied to the ignition system of the engine for the generation of ignition sparks. The pulses in the timing pulse sequence occur at different times from pulses in the ignition pulse sequence. In preferred embodiments, the sequence of timing pulses includes an identity code encoded therein.
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Citations
20 Claims
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1. An engine security system for an internal combustion engine comprising a security device arranged to receive a sequence of timing pulses generated in dependence on the rotation of said engine, to generate an ignition pulse sequence synchronous with the rotation of the engine from said sequence of timing pulses on receipt of an enabling code, and to supply said sequence to an ignition system of said engine for the generation of ignition sparks, such that pulses in said timing pulse sequence occur at different times from pulses in said ignition pulse sequence.
- 2. An engine security system for an internal combustion engine comprising a security device arranged to receive a sequence of timing pulses containing engine position and rotational speed information and generated in dependence on the rotation of said engine, said security device being further arranged to generate an ignition pulse sequence synchronous with the rotation of the engine from said information on receipt of an enabling code, and to supply said sequence to an ignition system of said engine for the generation of ignition sparks, said sequence of timing pulses having an identity code encoded therein.
Specification