· BorgWarner advanced technology to help SAIC GM's latest 9-speed gearbox efficiency improvement

As the global technology leader in cleaning and efficient drive system solutions for internal combustion engines, hybrids and electric vehicles, BorgWarner has provided a series of drives for SAIC GM's newly developed 9-speed automatic transmission (GF9) to improve fuel efficiency. product. The gearbox is used in the 2.0T, the Regal 1.5T, 2.0T and the Cadillac XT5 2.0T to help achieve the miniaturization of the engine to meet the latest emission standards to be implemented in the country. BorgWarner's durable and low-noise HY-VO chain features a unique sprocket and chain tooth design that greatly reduces friction while improving transmission efficiency and optimizing fuel economy. The SAIC-GM GF9 gearbox is also equipped with a BorgWarner start-stop accumulator, which significantly extends downtime and enables a smooth engine restart. In addition, the new generation of BorgWarner 250 small variable force solenoid valves can provide world-class control accuracy and improve shift quality.
Bo Yuehua China President Tan Yuesheng said: "With the 'National Five' landing 'National Six' trial, major OEMs are looking for more reliable and efficient technical solutions. We are very happy to be the SAIC GM 9-speed The gearbox provides the latest products and technologies, further extending our strategic partnership with SAIC-GM for up to 10 years."
BorgWarner's adjustable HY-VO chain has two different toothed arrangements designed to reduce noise, vibration and harshness in the transmission process, while reducing the chain and sprocket meshing surface pressure and improving wear resistance. The new HY-VO chain design significantly improves transmission efficiency compared to conventional gear mesh layouts. At the same time, its unique layout design replaces the traditional three-Axis gear transmission with a double-shaft chain drive, making the new HY-VO chain lighter in weight, smaller in space and more cost-effective.
The start-stop system improves fuel economy by shutting down the engine while parked. The BorgWarner start-stop accumulator has extremely high control flow and low leakage. The switch solenoid valve is used to actively start and stop the transmission to achieve high fuel economy and low carbon dioxide emissions. It also establishes rapid oil and oil pressure, avoids delay and torque disturbances, and improves the restart quality with a faster start-stop response for a smooth and quiet driving experience.
The new BorgWarner small variable force solenoid valve has a new magnetic circuit design and structure. Because it is not sensitive to temperature and supply pressure, it can achieve world-class accuracy within the control range, which is beneficial to improve fuel economy and shift quality. .

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