Overview of eTurbo™ Technology for Passenger Cars
Challenges with Standard Turbocharged Engines:- Turbo lag resulting in low RPM engine torque and slow time-to-torque.
- Need for larger or higher speed engines to achieve acceptable torque and response, negatively impacting fuel economy.
- Underutilization of excess energy in the exhaust stream.
- Excessive waste gating leading to high T4 temperatures, complicating aftertreatment design.
Benefits of eTurbo™:- Provides electrified boost assistance and recuperation in a single-machine solution.
- Reduces turbo lag, enhancing low RPM engine torque and response time.
- Allows for smaller or lower speed engines with exceptional torque and response.
- Improves fuel economy by downsizing or using lower speed engines.
- Converts wasted exhaust energy into electrical energy.
- Reduces T4 temperature, lowering aftertreatment construction costs.
- Enhances performance for new combustion concepts with electrical assist across the engine speed range.
- Reduces battery size due to eCharging effect, with 1 kW eCharging leading to an 8 to 10 kW performance gain.
How eTurbo™ Works:- Features a turbocharger with a single-shaft motor that can function as a motor or generator.
- Electric motor assists the turbine to provide supplemental boost air to the engine.
- Excess turbine energy from exhaust flow can drive the electric motor (generator).
- Electrical function can be turned off to revert to normal turbocharger function.
- Facilitates EGR on demand through intentional back pressuring of the engine.
Product Features:- Full performance 48V architecture and compliance with HV_2B and HV_3 high voltage architectures.
- Options for integrated and semi-integrated power electronics, including the use of engine coolant.
Challenges for Passenger Cars:- Improving fuel economy.
- Reducing emissions.
- Enhancing driver enjoyment and productivity.
Platform and Specifications:- eTurbo™ available in 48V (3 kW to 17 kW) and 400/800V (6 kW to 34 kW peak) versions.
- Versions include eB40, eB50, eB60, and eB80 with alternate motor lengths and voltage classes for each frame size.
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