BorgWarner will supply Eco-Launch™ stop/start accumulator technology and multi-segment wet friction plates for the new 8-speed rear-wheel drive automatic transmission (8L45) from General Motors. To enable the transmission’s stop/start functionality, BorgWarner’s Eco-Launch hydraulic accumulator and solenoid valve provide rapid, quiet and smooth engagements during engine restarts.
Stop/start systems increase fuel economy by turning the engine off when the vehicle stops. For quick acceleration from the stop mode, BorgWarner’s accumulator and Eco-Launch solenoid valve quickly re-prime the transmission in less than 0.3 seconds. The exceptionally low-noise, high-flow, low-leak solenoid valve opens against large accumulator pressures and stays closed against high line pressures.
BorgWarner’s multi-segment wet friction plate technology features full-depth grooves cut between segments of proprietary friction material. The groove patterns and material are engineered for each specific application to optimize the clutch for low drag which improves fuel economy, provides seamless shifts for better performance and delivers durability that exceeds the life of the transmission. Utilizing advanced processing capabilities and intricate groove designs, BorgWarner’s latest friction plate technology is proving successful under a widening range of operating conditions and offers the same benefits in torque converter applications.
