EcoMotors International of Allen Park has announced a joint venture with Generac Power Systems, Inc to develop the Opoc® engine for auxiliary power units, generators, and vehicle propulsion. The opposed-piston, opposed-cylinder internal combustion engine design combines the lower-emissions benefit of a 4-cycle engine, the simplicity of a 2-cycle engine, the higher power density of an opposed piston engine, and the most recent developments in computer and thermodynamics. Without the cylinder-head and valve-train components of conventional engines, the Opoc® engines are lighter, more efficient with high fuel economy, have fifty percent fewer parts than conventional engines, and have low noise and vibration. The two primary investors in the company are Bill Gates and Khosla Ventures, which is headed by Vinod Khosla, a founder of Sun Microsystems.