BYD and Bosch have jointly developed a black technology that will be first applied to the Han EV

BYD has another big move.

Recently, the dTCS jointly developed by BYD and Bosch was officially released, and will be first installed on the Han EV four-wheel drive version.

What is dTCS

dTCS is the abbreviation of distributed TCS, which is a distributed traction control system. It is a driving force control system specially designed for new energy vehicles to ensure that the vehicle has the best adhesion on various complex road surfaces such as ice and snow, so that the tires basically do not slip.

The addition of dTCS function does not require additional hardware investment, so the official decision will soon be to open this function for users of Han EV four-wheel drive version through free OTA upgrade. According to relevant engineers, dTCS can be applied to models with different drive forms such as front-wheel drive, rear-wheel drive, and four-wheel drive, so this function will be gradually opened for Han EV two-wheel drive version and other models in the future.

Thanks to the features just mentioned, such as no additional hardware required and OTA activation, BYD will continue to optimize dTCS after it is installed on the vehicle, so as to continuously improve its functional performance.

What are the advantages of dTCS

To facilitate understanding, let's briefly review TCS.

TCS is the abbreviation of Traction Control System, which can help the vehicle obtain the best traction possible under various working conditions.

The traditional TCS system was developed under the power architecture of fuel vehicles, so early electric vehicles could only continue to use this technology, but there are certain limitations: compared with internal combustion engines, the drive unit of electric vehicles - the electric motor has fast torque response and high peak force characteristics, so electric vehicles are more likely to break through the road adhesion limit, and then the wheels slip and cause the body to become unstable.

In order to eliminate this phenomenon, dTCS came into being. Compared with traditional TCS, the biggest advantage of dTCS is that the response speed is increased by 10 times.

So how does dTCS increase the response speed by 10 times?

By comparing the working paths of dTCS and TCS in the figure above, it can be seen that after dTCS integrates the traction control system into the motor controller, the step of VCU (vehicle controller) processing signals in traditional TCS can be omitted, thereby shortening the working path and ultimately reducing the entire torque response closed-loop time from 100 milliseconds to 10 milliseconds, increasing the speed by 10 times.

What are the advantages of cars equipped with dTCS over those not equipped?

Taking the Han EV four-wheel drive version equipped with dTCS and the Han EV four-wheel drive version equipped with only traditional TCS as examples, we conducted relevant tests on wet roads and split roads (that is, one side of the wheels is on a high-adhesion road and the other side of the wheels is on a low-adhesion road) at the Bosch Donghai Proving Ground, with the other variables of the two being the same and only the traction control systems being different.

As mentioned above, dTCS has a shorter response time, which means that the system can make faster adjustments when the tires slip, minimizing the amount of wheel slip.

When accelerating from a standstill on a slippery road, dTCS can more quickly control tire slippage at the start, thereby helping the vehicle gain as much adhesion as possible. This is reflected in the test results that vehicles equipped with dTCS accelerate faster.

When driving on a crossroads, if you suddenly step on the accelerator pedal deeply, dTCS will provide more delicate control over the vehicle, and the vehicle will only sway slightly. For vehicles equipped with traditional TCS, although the vehicle will not lose control in a similar situation, the entire control process will be much rougher and the swaying of the vehicle will be more obvious.

According to official data, the Han EV four-wheel drive version equipped with dTCS reduces the time required for full acceleration from 0 to 60 km/h on snow by approximately 0.8 seconds, and reduces the time required for full acceleration from 0 to 50 km/h on ice by approximately 2 seconds. The maximum controllable cornering speed on an ice and snow ring is increased by approximately 5-10 km/h.

Bang Reviews

The increasingly popular electric vehicles seem to have only the driving system that is different from fuel vehicles, and the rest seem to be completely copied. However, when electric vehicles gradually solve basic problems such as range anxiety and energy replenishment efficiency, those places that are not easily perceived have become the next battlefield for aspiring car companies. The dTCS jointly developed by BYD and Bosch is a vivid example. Since they have chosen to build electric vehicles, they must make them well. The dTCS built to adapt to the output characteristics of the motor is just the beginning. In the future, more technologies specifically designed for electric vehicles will be born. Over time, these electric vehicles will become more and more perfect.