Vehicular anti-theft system

• Main Authors: HIRATA, SANAE, HAYAKAWA, TAKAHIRO
• Format: Patent
• Language: English; French; German
• Published: 28.08.2002
• Edition: 7
• Subjects: APPLIANCES PREVENTING OR INDICATING UNAUTHORIZED USE OR THEFTOF CYCLES; BLASTING; COMBUSTION ENGINES; CYCLE STANDS; DEVICES FOR LEARNING TO RIDE CYCLES; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; IGNITION, OTHER THAN COMPRESSION IGNITION, FORINTERNAL-COMBUSTION ENGINES; LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS; LIGHTING; LOCKS INTEGRAL WITH CYCLES; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDEDFOR; STARTING OF COMBUSTION ENGINES; SUPPORTS OR HOLDERS FOR PARKING OR STORING CYCLES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES; TRANSPORTING; VEHICLES IN GENERAL; VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISEPROVIDED FOR; WEAPONS

An anti-theft system is arranged so that an operation of an engine of a vehicle is maintained as it is even when a CPU (32a) of an engine control unit (30, 30A) is reset for some reason during when the engine is operative. A CPU (21a) of a security ECU (20) performs arithmetic operations for enabling or inhibiting injection of fuel to the engine and for enabling to start a starter (40) on condition that a door key switch (10a) and an ignition switch (10b) are both turned on. The CPU (32a) of the engine ECU (30) performs arithmetic operations to maintain the injection of fuel to the engine based on data of fuel injection enabling or inhibiting process stored in a B/U RAM (34) even when it is reset after receiving the data of process for enabling or inhibiting the injection of fuel from the CPU (21a).