- Company : Topscom Technology Co., Ltd.
- Region : Guangdong , China
- Category : Apparel & Clothing > Wedding Apparel
- Contact Person : Frank Wu|||sales
- Telephone :
- Fax :
- Mobile phone :
- Website : www.pcbassemblycn.com
- Email : [email protected]
- Update : Jan/31/2018
Product Details
automotive electronics vehicle access and immobilizing systems modules pcba motherboards assembly electronics contract manufacturing services OEM CEM EMS experience company-China Shenzhen Topscom automotive immobiliser security device Electronics OEM EMS CEM Contract Manufacturing PCBA Assembly Services: An immobiliser or immobilizer is an electronic security device fitted to an automobile that prevents the engine from running unless the correct key (or other token) is present. This prevents the car from being "hot wired" after entry has been achieved and thus reduces motor vehicle theft. The electric immobilizer/alarm system was invented by St. George Evans and Edward Birkenbuel and patented in 1919. 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 its horn. The system settings could be changed each time the car was driven.[2] Modern immobiliser systems are automatic, meaning the owner does not have to remember to activate it. Immobilisers have been mandatory in all new cars sold in Germany since 1 January 1998, in the United Kingdom since 1 October 1998, in Finland since 1998, in Australia since 2001 and in Canada since 2007. Early models used a static code in the ignition key (or key fob) which was recognised by an RFID loop around the lock barrel and checked against the vehicle's engine control unit (ECU) for a match. If the code is unrecognised, the ECU will not allow fuel to flow and ignition to take place. Later models use rolling codes or advanced cryptography to defeat copying of the code from the key or ECU. The microcircuit inside the key is activated by a small electromagnetic field which induces current to flow inside the key body, whic
