Toyota How-To: Smart Key | Toyota
A smart key is an electronic access and authorization system optional or standard in several cars has been developed by Siemens in 1995 and presented by Mercedes-Benz as the Keyless Go in 1998 on the W220 S-Class next its design patent filed by Daimler-Benz May 17, 1997 1.
The chip key allows the operator to maintain the keychain pocketed when unlocking, locking and starting the vehicle the key is identified by one of a plurality of antennas into the bodywork of the car and a radio pulse generator in the key housing depending on the system, the vehicle is automatically unlocked when a button or a sensor on the door handle or chest press the car key equipped with a smart key system having a mechanical backup, usually in the as a spare key blade supplied with the vehicle Some manufacturers hide the backup lock behind a cover for style.
An ignition switch push-up of the fixing device on a Mitsubishi RVR equipped with the smart key.
Vehicles with a smart key system can disengage the locking device and activate the ignition without inserting a key in the ignition, provided that the driver has the key in the car on most vehicles, this is done by pressing a start button or turning an ignition switch.
At the exit of a vehicle equipped with a smart key system, the vehicle is locked by pressing a button on one of the door handles, by touching a capacitive area of a door handle, or simply walking away from the vehicle the locking method varies between models.
Some cars automatically adjust settings according to the smart key used to unlock the car user preferences such as seat position, steering wheel position, exterior mirrors, the temperature settings of air conditioning and stereo presets are popular adjustments and some models like the Ford Escape even have parameters that can prevent the vehicle from exceeding a maximum speed when a certain key is used to start.
In 2005, the research expert car insurance UK Thatcham introduced a standard for keyless entry, which requires the device to be unusable at a distance of more than 10 cm 3 in a vehicle independent testing has found the system of the Nissan Micra in the safer, while some key BMW and Mercedes have failed, theoretically being able to afford to chase cars while their owners were refuel despite 4 these security flaws, auto theft rate declined 7 percent between 2009 and 2010, and the National Insurance crime Bureau smart key credits for this reduction of 5. 6
SmartKeys was developed by Siemens in mid-1990 and presented by Mercedes-Benz in 1997 to replace the infrared security system introduced in 1989 Daimler-Benz filed the first patents for SmartKey February 28, 1997 in the German patent office with multifunction key Switchblade following variants May 17, 1997 7 8 9 10 the device consisted of a plastic key to use in place of key electronics traditional metal that control locks and ignitions has replaced the traditional key with sophisticated computer key it is considered a step up from SmartKey keyless adopts the input buttons on the remote keyless and integrates them into the holder SmartKey.
Once inside a Mercedes-Benz vehicle, carrier SmartKey, unlike keyless entry gussets, is placed in the ignition slot where a boot computer checks the rolling code checked in milliseconds, it can be turned like a conventional key to start the engine the device was designed with the cooperation of Siemens Automotive and Huf exclusively for Mercedes-Benz, but many luxury manufacturers have implemented a similar technology based on the same quote SmartKey idea needed addition, Mercedes-Benz now includes optional Keyless Go; this feature allows the driver to keep the SmartKey in their pocket, but giving them the opportunity to open the doors, trunk and start the car without ever removing their pocket.
SmartKey electronics are embedded in a triangular hollow piece, plastic, wide closely up and down, the squared-off peak with a half-inch long piece of the insert side of the SmartKey also hides a traditional key Mercedes Benz can be drawn from a top version of the metal key is used for purposes such as valet lock the glove box or trunk before SmartKey returned to a parking officer once locked manually, the trunk can be opened with SmartKey or buttons inside the keychain transponder uses a radio frequency to communicate with door locks, but uses infrared to communicate with the original engine immobilizer SmartKeys had limited frequency and could have been used in the firing line for safety reasons, the driver can point the smart key to the door of con side ducer forward while pressing and holding the unlock button on the SmartKey and windows and sunroof open to ventilate the Similarl cabin there, if the same procedure is completed, while maintaining the lock button, the windows and sunroof will close in cars equipped with Ventilated seats assets, the opening function was active seat ventilation in addition to opening the windows and sunroof.
Keyless Go Go also keyless entry; Passive Entry Go is a generic term for an automobile technology that allows a driver to lock and unlock a vehicle without using the corresponding buttons SmartKey Once a driver enters a vehicle equipped with Keyless Go Keyless Go SmartKey or wallet-sized card they have the ability to start and stop the engine without inserting the SmartKey integrated transponder within the SmartKey enables the vehicle to identify the driver an additional safety device is integrated into the vehicle, making it impossible to lock SmartKey with Keyless Go into a vehicle.
The system works by having a series of LF low frequency 125 kHz transmit antennas inside and outside the vehicle External antennas are located in the door handles when the vehicle is started, either by pulling on the handle or touching the handle, an LF signal is transmitted through antennas to the key the key is activated if it is close enough and transmits its ID back to the vehicle via frequency 300 MHz RF radio to a receiver located in the vehicle if the key has the correct ID, the enables the PASE modulates the vehicle.
The hardware blocks of an input control unit without electronic key ECU GB are based on functionality.
Transmit low frequency signal BF through the 125 kHz power amplifier block.
Receiving RF signals from 300 MHz radio frequency from the ISM integrated receiver block.
Encrypt and decrypt all security relevant data signals.
Disclose relevant interface signals with other electronic control units.
The smart key determines whether it is inside or outside the vehicle by measuring the force of the LF fields To start the vehicle, the smart key must be inside the vehicle.
The mark of a good passive entry system is that the user never hits the wall This occurs when the user pulls the door handle to its full extent before the door is unlocked the handle must be released and pulled again to access good systems have a priority on the device which allows doors to open more quickly.
It is important that the vehicle can t be started when the user and therefore the Intelligent Key is outside the vehicle This is particularly important in fueling stations where the user is very close to the vehicle's internal LF field is allowed to exceed a maximum of 10 cm to help minimize the maximum risk overtaking is usually on the side windows where there is very little signal attenuation.
A second scenario exists under the name of relay station attack RSA RSA is based on the idea of reducing the long physical distance between the car and the relay stations SmartKey Two regular car owners will be required for this The first relay station near the car and the second is near the SmartKey so at first glance, keyless entry GB ECU and the SmartKey can communicate with a third person in the car could pull the door handle and the door would open, however, in all provisions of the keyless entry system GB exist to prevent bidirectional communication with successful RSA Some of the best known are.
In addition, keyless entry GB communicates with other control units in the same vehicle depending on the architecture of the electric car, the following are control systems that can be activated or deactivated.
Dead zones are the result of the maximum excess demand over the power delivered to the internal LF antennas should be adjusted to give the best performance such dead spots minimum and maximum average actual excess dead spots are usually near the ends of the vehicle, eg the rear package shelf.
If the battery of the Intelligent Key is discharged, there must be a backup method of opening and start opening the vehicle is made by a blade urgency of fully mechanical key usually hidden in the smart key some cars starting is achieved by a transponder inside the smart key that does not need batteries to operate, the user must either put the key in a slot or maintain close to a special area on the cockpit, where there is a further antenna transponder coil hidden behind LF to compensate for a weakened battery door.
Slot machines have proven to be problematic, because they can go wrong, and the key will be locked and can not be removed Another problem with the slot may compensate t fob battery below a certain threshold of operation of the key batteries smart are sensitive to temperature causing the carrier to become intermittent, fully functional, or does not work all in the same day.
A keyless entry system GB should be able to detect and treat most of the following cases.
SmartKey transponder has been forgotten in the trunk.
The first GB of free entry ECU car key MB S-Class, Series 1998 99.
The system is based on a technology invented by Siemens VDO called PASE and startup passive entry system It works in the ISM band radio frequencies without key input Go was first introduced by Mercedes-Benz in the series S-Class cars in 1998.
Today, a keyless entry system GB is a state of the art technology and still has a lot of potential for optimizing Here are some general development trends ahead AD and SD series.
SD reduction LF antennas used in compact cars at low cost results in detection quality loss.
AD using electric field antennas instead of magnetic field reducing costs of antennas.
AD using a microwave frequency radar instead of a combination LF and RF comfort.
AD Biometric authentication identifies the user and not the SmartKey transponder.
A test of the ADAC revealed that 20 car models with Keyless Go could be seized and driven without the key 11 12 13 14 In London in 2014, 6000 about 17 cars a day were stolen using the keyless entry 15 .
To add an additional Intelligent Key to a vehicle, it must be programmed by the car dealership or an automotive locksmith licensed.
Smart key, smart entry keyless, keeps lead.