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Navistar Reaches Development Agreement With EcoMotors International On Groundbreaking Engine Design

WARRENVILLE, Ill. Feb. 22, 2011

EcoMotors International’s first product targeted for commercial application is a turbo-diesel version of the innovative opposed-piston, opposed-cylinder engine.

Dan Ustian

Vinod Khosla Bill Gates

"We are delighted that Navistar, a global leader in the commercial vehicle industry, has recognized the game-changing promise of opoc®," said Khosla. "The only truly disruptive technologies are those that can provide not only rapid payback but also economic and carbon benefits to large segments of the world’s population without the need for subsidies or massive infrastructure investments. Among next-generation propulsion systems, the opoc® engine is broadly applicable and can provide lower carbon emissions than almost any other technology."

Opposed-Piston, Opposed-Cylinder Engine with Modular Displacement Capability

EcoMotors’ patented engine design creates a ground-breaking internal combustion engine family architecture that will operate on a number of different fuels, including gasoline, diesel, natural gas and ethanol. The opoc’s new opposed piston-opposed cylinder direct gas exchange operation provides the well known emissions benefits of 4-cycle engines, the simplicity benefits of 2-cycle engines, the power density of the less well known opposed piston engine, and the extraordinary developments in electronics and combustion technology all tied together in a new and proprietary engine architecture.

Don Runkle

The opoc® engine comprises two opposing cylinders per module, with a crankshaft between them — each cylinder has two pistons moving in opposite directions. This innovative design configuration eliminates the cylinder-head and valve-train components of conventional engines, offering an efficient, compact and simple core engine structure. The result is an engine family that is lighter, more efficient and economical, with lower exhaust emissions.

EcoMotors’ opoc® engine has a number of distinct advantages over traditional internal combustion engines. The opoc® engine has very high power density of nearly one horsepower per pound resulting in an unprecedented lightweight and compact engine. The opoc® engine is perfectly balanced enabling stackable power modules. This unique modular displacement capability is one of the long standing, but elusive goals of engine engineers’ quest for high efficiency. In addition, it also results in much less NVH than a conventional engine of comparable power. Its elegantly simple design allows for low cost, efficient manufacturing and increased operating durability:

  • 50 percent fewer parts than a conventional engine
  • Straightforward assembly
  • No cylinder heads or valve-train
  • Uses conventional components, materials and processes

"Consistent with our leadership strategy, Navistar continues to seek innovative products which differentiate us from the marketplace, while others embrace the status quo," said Eric Tech, president, Navistar Engine Group.

Power Density

The internal combustion piston engine has been the primary means of automotive propulsion for more than a century. Today, thousands of engineers around the world are hard at work trying to improve this 19th century invention. Some are striving to make incremental gains; some are hoping for a breakthrough. For all of them, one measuring stick is the "acid test" for any engine — power density. As greater power density is achieved, a range of critically important attributes will result, including:

  • Lower weight
  • Smaller size
  • Lower material costs
  • Lower friction
  • Greater fuel efficiency
  • Lower emissions
  • Lower heat rejection

Electrically Controlled Turbocharger

EcoMotors’ intellectual property also includes an electrically controlled turbocharger technology which incorporates an electric motor in the turbo assembly to regulate boost pressure resulting in a long list of unique advantages:

  • Improved combustion efficiency to meet emissions
  • Electrically controlled variable compression ratio
  • Improved vehicle fuel economy
  • Enhanced vehicle drivability due to improved low-end torque
  • Eliminates Turbo lag
  • Waste heat recovery by generating electricity

Electrically Controlled Clutch

The development in clutch technology enables customers to take advantage of the engine’s modular displacement capability. The clutch assembly is housed between two engine modules, and is engaged when vehicle power demands require both modules to deliver power. When the power of the second module is not needed, the clutch is disengaged, allowing the second engine to stop completely. This not only improves fuel economy dramatically by reducing parasitic losses, but also improves the efficiency of the primary module.

About EcoMotors International

Allen Park, Mich. Bill Gates Vinod Khosla Menlo Park, California

About Navistar

*All marks are trademarks of their respective owners.

SOURCE EcoMotors International

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