e-Turbo

Challenges for Commercial Trucks

• Better fuel economy.
• Lower emissions.
• Longer lifetime.

Turbocharged Engine Challenges

Standard Setup

• Turbo lag: low rpm engine torque, slow time-to-torque.
• Larger engine or higher speed engine used to make up acceptable levels of torque and response.
• Fuel economy suffers due to larger or higher speed engine.
• Under certain conditions there’s an excess of energy in the exhaust stream that goes under-utilized.

Turbocharged Engine Benefits

with eTurbo^TM

• Single-machine solution for electrified boost assitance and recuperation.
• Reduced turbo lag: better low rpm engine torque, faster time-to-torque.
• Smaller engine or lower speed engine can be used and have acceptable levels of torque and response.
• Fuel economy improves due to downsized or lower speed engine.
• Wasted exhaust energy is converted to electrical energy.

eTurbo^TM

How it works

• A turbocharger with a (single-shaft) motor attached, can serve as either a motor or a generator.
• Electric motor can assist the compressor to provide supplemental boost air to the engine.
• Electric motor (generator) can be driven by excess turbine energy from the exhaust flow.
• Electrical function can be turned off to be returned to normal turbocharger function.
• Can help drive EGR on demand due to intentional backpressuring of the engine.