Diversified powertrain electrification paths

It is understood that with the continuous improvement of automobile energy-saving technology, the current average fuel consumption of new passenger cars in China continues to decline, and it is close to the target value of 5L per 100 kilometers in 2020. At present, a large number of high compression ratios (12-13) + Miller cycle have been applied. +Variable displacement accessories + low friction technology and other advanced energy-saving technologies, the thermal efficiency of gasoline engines is gradually approaching the international advanced level of 40%; the proportion of automatic transmissions has reached more than 70%, 7DCT and 8AT have achieved mass production; CVT, CVT180, CVT250 successively Mass production.

However, facing the future with stricter emission standards, it is still difficult to meet the standards simply to improve the thermal efficiency of gasoline engines. Wang Binggang, the leader of the National New Energy Vehicle Innovation Project Expert Group, said in an interview with Gasgoo that in view of my country’s national conditions, diversified automotive technologies and energy types are more suitable. While developing the electrification of vehicles, it is necessary to attach importance to the development of traditional vehicles. Transformation. Therefore, the expert group agreed that in the next 15 years, traditional Chinese cars will be fully transformed into hybrid models.

Key technologies for more efficient powertrain electrification

As a provider of comprehensive solutions for powertrain electrification, SAIC Transmission has developed a high-speed and deeply integrated electric bridge. According to Lu Jibo, the forward-looking technical director of Shanghai Automotive Transmission Co., Ltd., this is a three-in-one drive bridge that realizes the deep integration of high-speed, high-speed permanent magnet synchronous motors and high-performance controller MCU integration. The maximum speed of the drive motor can reach 16000rpm; the reducer is designed and developed according to the requirements of German Volkswagen MEB. The peak power can reach 165KW, the peak torque is 300Nm, and the torque at the wheel end reaches 3900Nm. At the same time, the drive motor is divided into high and low power. Version, the reducer can use different speed ratios, and can be used in various models such as SUVs and cars.

Potential market prospects for powertrain electrification

For powertrain, although there will be many challenges on the way to electrification, this market with great development potential is still worthy of everyone's desire.

The latest sales data shows that in October 2020, the wholesale sales of new energy passenger vehicles exceeded 144,000, a year-on-year increase of 119.8% and a month-on-month increase of 15.9%. With the recovery of the new energy vehicle market evident, the entire passenger vehicle market has begun to recover. "We looked at the entire insurance data and terminal sales. Since July, the growth rate of the entire market has been above 100%, which reflects that the new energy market has driven the growth of overall sales."

Duan Zhihui, the National New Energy Vehicle Technology Innovation Center, which has long adhered to the research and development of hybrid power systems, still expressed its optimistic views on the hybrid power market. It is understood that there are currently more than 90 kinds of hybrid systems at home and abroad, among which the more mainstream are power split, series and parallel, and P2 or P2.5. These three technologies have their own advantages and disadvantages. "When companies are vigorously developing hybrid technology, don't be misled by a wrong concept and choose a not-so-good route." Duan Zhihui appealed.