Electric driveline axle
The eAxle takes power from a 65kW, 240N-m electric machine with a nominal maximum input speed of 13,000rpm. A two-stage, single-speed gearbox with a ratio of 10:1 delivers a nominal output torque of 2,400N-m. The system supports both pure electric driving and full all-wheel-drive capability where the rear wheels are driven by electric power and the front by a combustion engine.
In AWD and power mode, the engine operates continuously, and a 34kW engine mounted start-stop system ensures the charge level in the battery pack to supply the eAxle with requested power.
The system has internal efficiency of around 97.5% and uses a differential with electronic disconnect to decouple the electric motor at times to minimize losses.
Lightweight engine mounts
Polyamide hydraulic mounts are about 20% lighter than traditional systems. Small-displacement engines require larger mounts to absorb vibration, so new mounting systems need to be light, yet strong. Changing to polyamide, from metal systems, enables more design options, allowing more detailed, smoother, more streamlined components.
Automotive engine seals
The Levitex gas-lubricated crankshaft face seal functions with a cushion of air reducing both fuel consumption and CO2 emissions by approximately 0.2mpg for a vehicle rated at 33mpg. The seal has two rings, one firmly attached to the crankshaft and the other to the housing. One ring has specially designed grooves a few micrometers deep, so when the crankshaft rotates, air is dragged against the sealing dam that encloses the grooves. The grooves taper to a closed tip, producing an air cushion that separates one sealing surface from the other. This air gap creates a nearly frictionless seal for the engine.
Freudenberg-NOK Sealing Technologies
Pre-driver integrated circuit
The TB9150FNG opto-isolated insulated gate bipolar transistor (IGBT) pre-driver IC has protective functions for in-vehicle inverters on electric and hybrid vehicles. Inverter control is used to drive the motors of electric and hybrid vehicles efficiently. As the control and drive functions have different operating voltages, they must be isolated from each other and secured with a device such as a photocoupler.
The TB9150FNG integrates a photocoupler that secures high-level isolation characteristic between control (the primary side) and drive (the secondary side). It incorporates a precise IGBT temperature detection function, a flyback transformer controller, and a short-circuit detection function that all contribute to system downsizing.