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The electric immobiliser/alarm system was invented by St. George Evans and Edward Birkenbeuel and patented in 1919. [2] They developed a 3x3 grid of double-contact switches on a panel mounted inside the car so when the ignition switch was activated, current from the battery (or magneto) went to the spark plugs allowing the engine to start, or immobilizing the vehicle and sounding the horn. [3]
The digital key specification for cars is maintained by the Car Connectivity Consortium. [6] As of 2023, most implementations of the technology follow the Digital Key 2.0 standard. The first automobile to follow the Digital Key 3.0 standard was the BMW iX. [7] Manufacturers can set limits on how many devices a key can be shared with.
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Depending on the system, the vehicle is automatically unlocked when a button or sensor on the door handle or trunk release is pressed. Vehicles with a smart-key system have a mechanical backup, usually in the form of a spare key blade supplied with the vehicle. Some manufacturers hide the backup lock behind a cover for styling.
This is a list of auto parts, which are manufactured components of automobiles. This list reflects both fossil-fueled cars (using internal combustion engines) and electric vehicles; the list is not exhaustive. Many of these parts are also used on other motor vehicles such as trucks and buses.
TM 9-2800 Standard Military Motor Vehicles. dated 1 sept. 1943; TM 9-2800 Military vehicles dated October 1947; TM 11-227 Signal Communication Directory. dated 10 April 1944; TM 11-364 K-44-B Truck and earth borer equipment HD; TM 11-487 Electrical Communication systems Equipment. dated 2 October 1944; TM 11-487-C1 military standardization ...
Car key in ignition Car ignition and steering wheel lock. A car key or an automobile key is a key used to open and/or start an automobile. Modern key designs are usually symmetrical, and some use grooves on both sides, rather than a cut edge, to actuate the lock. It has multiple uses for the automobile with which it was sold.
Today, passive systems are commonly found on a variety of vehicles, and although the exact method of operation differs between makes and models, their operation is generally similar: a vehicle can be unlocked without the driver needing to physically push a button on the key fob to lock or unlock the car.