A park by wire system engages the
parking pawl
A parking pawl is a device fitted to a motor vehicle's automatic transmission that locks up the transmission when the transmission shift lever selector is placed in the Park position. "Park" is the first position of the lever (topmost on a column ...
of a transmission using electrical means. This can also be considered as part of a
shift by wire
Shift-by-wire is the system on an automatic transmission in which the transmission modes are engaged/changed in an automobile through electronic controls without any mechanical linkage between the gear shifting lever and the transmission. The tran ...
system whose objective is to put the vehicle in Park, Reverse, Neutral and Drive modes without the traditional mechanical system which involves linkages between the gear shifter and the transmission. The main components of a park by wire system include the driver interface which could be a lever, switch or knob as designed by the OEM (input), an
electronic control unit
An electronic control unit (ECU), also known as an electronic control module (ECM), is an embedded system in automotive electronics that controls one or more of the electrical systems or subsystems in a car or other motor vehicle.
Modern vehic ...
to host the control system and actuators (one or two motors) which are capable of driving the parking pawl into and out of the locking position with the parking gear of the transmission.
See also
*
Shift by wire
Shift-by-wire is the system on an automatic transmission in which the transmission modes are engaged/changed in an automobile through electronic controls without any mechanical linkage between the gear shifting lever and the transmission. The tran ...
*
Drive by wire
Drive by wire, DbW, by-wire, steer-by-wire, fly-by-wire or x-by-wire technology in the automotive or aviation industry is the use of electrical or electro-mechanical systems for performing vehicle functions traditionally achieved by mechanical link ...
*
Electric park brake
An electronic parking brake (EPB), also known as an electric parking brake or electric park brake, is an electronically controlled parking brake
In road vehicles, the parking brake, also known as a handbrake or emergency brake (e-brake), is a ...
*
Parking pawl
A parking pawl is a device fitted to a motor vehicle's automatic transmission that locks up the transmission when the transmission shift lever selector is placed in the Park position. "Park" is the first position of the lever (topmost on a column ...
*
Automatic transmission
An automatic transmission (sometimes abbreviated to auto or AT) is a multi-speed transmission used in internal combustion engine-based motor vehicles that does not require any input from the driver to change forward gears under normal driving c ...
References
{{Vehicle regulations
Automotive transmission technologies
Vehicle safety technologies