Ecomotors Opposed-Piston Opposed-Cylinder Engine Could make Class 8 Trucks 45% More Fuel Efficient

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Ecomotors Opposed-Piston Opposed-Cylinder Engine could make class 8 trucks 45% more fuel efficient Ecomotors has a goal to demonstrate, in 2010, the automobile industry’s first 5-passenger car capable of 100 mpg on the EPA highway cycle.

Greencarcongress reports – With a two-module application configured at the appropriate power level (to deliver a combined 480 hp), the opoc unit could deliver about 45% better fuel efficiency compared to a conventional heavy-duty diesel engine in a Class 8 truck, the company suggests, while delivering emissions at the US Tier 2 Bin 5 level (the 50-state level in the US for diesel light duty vehicles).

With no valvetrain, the opoc engine has 40% less friction than conventional valve-controlled engines. The engine design features 90% cylinder scavenging, a high-pressure fuel injection system, and an electrically controlled turbocharger, allowing it to run higher levels of EGR. Four features allow the opoc engine to achieve that high 90% scavenging:

* Asymmetric port timing
* Circumferential ports
* Uni-flow air charging
* Electronically-controlled turbocharging

This patented design creates a ground-breaking internal combustion engine family that will run on a number of different fuels, including gasoline, diesel and ethanol. The engine operates on the 2-cycle principle, generating one power stroke per crank revolution per cylinder. It comprises two opposing cylinders per module, with a crankshaft between them, and 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 compared with conventional designs. Here you can see this revolutionary 2-stroke engine in operation, which helps to illustrate the simplicity, elegance and compactness of its design.


* Lightweight with high power density produces more than 1 hp per pound of engine weight
* Low emissions
* High fuel economy
* Simplicity of design for manufacturing efficiency, economy and operating durability
* 50-percent fewer parts than a conventional engine, straightforward assembly
* no cylinder heads or valve train
* uses conventional components, materials and processes
* Inherently low noise and vibration
* all engine forces counteract each other runs as a fully balanced 4-cylinder 4-stroke engine


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