The latest third generation of dual-clutch transmissions features electro-mechanic shift drums for shift actuation and electro-hydraulic pump actuation for clutch actuation. The pump actuators integrate a pump and the electric motor driving it. These modules can be flexibly placed anywhere within the transmission. Pump actuation technology was launched with the 7DCT300 and is gradually being introduced in additional dual-clutch and hybrid transmissions.
A smart, demand-controlled actuation is the key for efficient automation. With Smart Actuation, we create a modular standard for dual clutch and hybrid transmissions.
Dual clutch transmissions use the same low-loss technology as manual transmissions, supplemented by the actuation components for automated shift and clutch operations. A low power consumption of the actuation ensures maintaining high efficiency. Since their introduction, our dual clutch transmissions have proven to be exceptionally efficient automated transmissions.
Combined with the 7DCT300, Smart Actuation requires a mere 30 Watt of electrical power on average in the NEDC. This low consumption does not have any significant effect on fuel consumption, thus preserving the high efficiency of manual transmissions with dual-clutch transmissions. In practice, an intelligent shift strategy can even help to reduce real-life fuel consumption.
The modular design of Smart Actuation is another advantage: pump actuators as well as the shift drums belong to a common Corporate Transmission Architecture, meaning they can be used across all of the latest dual-clutch and hybrid transmissions.Technical progress effects every member of the transmission portfolio, and product variants can be designed by modifying the software instead of having to develop new hardware. These advantages will become even more crucial in the future, as they can be seamlessly transferred to hybrid transmissions.