Electrified Internal Combustion Engines

Maximum Efficiency.

Design and development of the internal combustion engine through optimal usage of electrification – for maximum system efficiency (dedicated hybrid engine).

Mitsubishi Hybrid engine

Internal combustion engine technology is undergoing radical changes. These are primarily driven by climate change and stricter CO2 and emission legislation. Electrification of the propulsion system enables maximum efficiency in the layout of the internal combustion engine, all the way to zero carbon.

This is the complex environment in which we are developing the optimal solution for you and your use case.

The electrified internal combustion engine must be viewed as a complete system. Rather than focusing on combustion itself, we concentrate on improving the operating strategy. Our holistic simulation environment allows us to develop efficient and reliable concepts, and to bring these to series production in a robust and secure manner.

The synergies provided by our hybrid approach now drive effectiveness above 45 %, surpassing the 38 % achieved some years ago by gasoline engines in passenger cars. We have increased effectiveness from 46 % to 50 % for the latest generation of diesel engine often found in commercial vehicles. Hydrogen combustion enables a zero-carbon internal combustion engine.

PHEV powertrain

Development of electrified internal combustion engines requires conflicting objectives to be met for legislation, technical values, and minimizing costs.

Particularly with regard to commercial vehicles, the focus is much more on total cost of ownership (TCO) than for passenger cars. Which is why total lifetime, reliability, and the highest level of efficiency must be ensured.

The modern commercial vehicle engine, with an effective efficiency of 50 %, is characterized by:

  • High peak cylinder pressure capability enabled by AVL design solutions
  • Advance combustion layout with fast burn duration and high compression ratio
  • AVL Top Down Cooling
  • Reduced friction and parasitic losses
  • Optimized air handling with low pressure drops and high turbocharger efficiency
  • Optimized heat-up and keep- warm measures, well-tailored to the base engine and application demands


Mitsubishi PHEV

Dedicated passenger-car-hybrid gasoline engine with 45 % effective efficiency
Our key areas of focus for development are as follows:

  • Reduced friction
  • High geometric compression (>16:1)
  • Optimal bore-stroke ratio related to efficiency
  • High tumble combustion process for optimal carburetion and maximum residual gas tolerance
  • Cooled low-pressure AGR
  • E-TC/TC with optimized charging efficiency
  • Reduction of wall thermal loss (surface finish, coating, …)
  • Innovative AVL combustion control for maximum efficiency and maximum combustion stability, even in high-dynamic operation (high AGR rates)
  • Innovative ignition (prechamber ignition, multispark, microwave ignition …)
  • Thermal management

Diesel zero-impact concept car
A 48 V demonstration vehicle focusing on low emissions has been constructed, based on a Hyundai Santa Fe with a 2.2 l diesel engine. 

Technology elements investigated: 

  • 48 V P2 module with 20 kW e-motor
  • Electrically heated catalytic converter
  • Air circulation system to preheat exhaust system near to engine
  • Twin-dosing SCR system
  • Combined AGR system (low-pressure and high-pressure)
  • Electrified auxiliary units
  • Aggressive heating strategy
  • Functional adjustment for operating strategy with optimized emissions and consumption
  • Additionally: Evaluation of various battery sizes and e-motor power using simulation
Hyundai Santa Fe

At AVL, we have devoted ourselves to the development of innovative drive technologies for more than 70 years. We also have more than 20 years of experience with hybrid drive systems. 

We boast series production expertise recognized around the world, and have been working on the development of concept cars with renowned industry partners for 30 years.

Topics in detail:

  • High efficiency solutions - Dedicated hybrid engines  
  • Robust operating strategy - Fuel consumption - Emissions - Driver experience  
  • From system definition to Start of Production and Lifetime Management
Proven Methods for a Dynamic Environment


Moving steadily into the future: Find out what’s brand new in the field of electrified internal combustion engines. 

Automated and Connected Mobility
ADAS & Autonomous Vehicle Technology Expo

Join us at the ADAS & Autonomous Vehicle Technology Expo in Stuttgart on June 4 - 6, 2024. Discover groundbreaking technologies driving autonomous and ADAS applications and approach our experts at booth #6510.

Company Movie
New Company Movie: Reimagining Motion

Let us take you on a journey of how we set things in motion - whether it's vehicles, technologies or ideas.

You are currently on the AVL Global Site. Click below if you would like to switch to