When it comes to the shift rod, we have to talk about the rapid development of electronic shift rod, other kinds of shift rod, another detailed description.
Now there are four types of shifters on the market. From the history of development, they are: MT (ManualTransmissionShifter, manual shift lever) - > AT (AutomaticTransmissionTransmissionShifter, Automatic gear lever) to AMT (AutomatedMechanicalTransmissionShifter, semi-automatic gear lever), GSM (GearShiftModule, or SBW = ShiftByWire, electronic gear lever)
As the shift rod of MT and AT is basically a pure mechanical structure, it has little relation with the electronic shift rod. Therefore, as explained at the beginning, another column is created.
Before we talk about the electronic shift lever, let's talk about the AMT shift lever.
The AMT gear lever not only inherits the mechanical structure of MT/AT perfectly, but also uses electromagnetic induction to identify gear positions or not identify them, and only output signals of different gear positions. Simply put, the AMT gear lever or its linkage component is equipped with magnets with positive and negative poles in the north and south, and changes its position through different gear positions. The base board (PCB) equipped with a SENSOR IC on the AMT shift lever generates magnetic induction to the magnets in different positions and outputs different currents. The vehicle processor module will shift gears corresponding to different currents or signals.
From the perspective of structure, AMT shift rod is more complex than MT/AT shift rod, technology is up, the cost of single unit is more expensive, but for vehicle OEM, the use of AMT shift rod, as long as a small transformation, that is, can mostly use the power train of MT, so the overall cost of the vehicle will be lower
Why the AMT shift lever? It is because the electronic shift rod also uses the principle of electromagnetic induction of the AMT shift rod to shift gears.
However, there is a difference between having a Micro-CPU on the substrate and not having one.
If the substrate (PCB) is equipped with a Micro-CPU, it will discriminate different current, confirm its corresponding gear, and send the information of the corresponding gear to the vehicle ECU in a specific transmission mode (such as CAN signal). The information is received by the corresponding ECUs (e.g. TCM,TransmissionControl) and the transmission is instructed to shift. If there is no Micro-CPU on the base board (PCB), the electronic shift lever itself will be sent to the vehicle ECU through the wire signal to shift the gear.
It can be said that the use of AMT shift bar is a compromise of vehicle OEM for cheap car manufacturing costs, which has both the huge size of MT/AT shift bar and the choice of electromagnetic induction. However, the choice of electronic shift bar is not limited by the size, so the electronic shift bar is currently developed with the goal of miniaturization as the premise. Therefore, more space can be left in the vehicle design. In addition, parameters such as shift rod Stroke and Operation Force can also be optimized compared with the mechanical shift rod, making the operation more comfortable for the driver.
At present, the types of electronic Lever in the market are as follows: Lever Type, Rotary/Dial Type, Push Switch Type, Column Lever Type.
Taking the knob as an example, it can automatically return to P gear and be locked by BTSI(BRAKING TRANSMISSION SHIFT INTERLOCK) or take on autonomous liftoff. In the vehicle system, braking bar comes with a mature program is essential, otherwise it will only report various errors, so it needs to brush software debug. The straight stick BMW chicken leg also has the function of turning back to P gear after extinguishing.
From the beginning of large size, bulky mechanical shift bar, to the development of miniaturized, lightweight electronic shift bar with its own program, has indeed made great progress on the tall and tall, but can not say that the use of electronic shift bar will be another vehicle cost is lower, but will rise, so the current OEM is still mainly mechanical shift bar design. But with the further increase of new energy vehicles, it can be predicted that the electronic shift rod will gradually become the mainstream in the future.
