|The H-engine—basically two separate engines housed within the same engine block—comprises two switchable parallel piston banks, independently fueled by gasoline and CNG. Click to enlarge.|
Startup Eco-Motive has developed what it calls the first dual-fuel “H” engine; it recently received a patent (#8807098) on the design. The H-shaped engine comprises parallel left-side and right-side vertical inline piston banks, each having a crankshaft and pistons, a cylinder head, and individual fuel feeds, but sharing a common power transmission system. Each piston bank operates independently of the other but is housed within the same engine block and has separate lubrication systems.
The Eco-Motive H-motor—basically two separate engines housed within the same engine block—can be powered by either gasoline or compressed natural gas (CNG), at the driver’s decision. The chosen engine is mechanically or electrically selected via an engine bank selector box using a selector control which selects the fuel type and engages a drive gear on the crankshaft of the selected engine, and transfers power to the transmission. The selector control actuates a transfer system that prevents simultaneous operation of both engines. The vehicle stays in that fuel mode until changed by the driver.
|Click to enlarge.||Click to enlarge.|
The crankshafts for each bank are centrally and longitudinally located below the respective banks. The left-side fly wheel and the right-side fly wheel (or other suitable equivalent) permit balancing of the left-side crankshaft and the right-side crankshaft respectively. The first flywheel and the second flywheel may be offset, such that a forward and a reverse sliding gear may engage either a left-side crankshaft or a right side crankshaft to the transmission.
The selector control is able to slideably direct-engage the first flywheel to the input shaft of the transmission. Other gearing, balancing, power transmission means and the like may be employed, according to the patent.
The H-motor is fed by dual gas tanks on either side of the drive shaft. A fuel inlet for each tank can be located on the side of the car where its tank will reside. Exact specifications may vary depending upon the OEM.
The engine was invented by Herns Louis, veteran of more than 30 years in the parts manufacturing industry ranging from automotive to aerospace, specializing in computerized parts machining. This twin-bank engine is a result of Louis’s experience, along with his vision to help meet an emerging market need for more efficient, lower-exhaust CNG engines.
An OEM can adopt our idea to any internal combustion engine with an even number of cylinders to any truck, SUV or car they currently build, regardless of its transmission or configuration. The technology can be easily adapted to existing engines, making the implementation very cost effective.—Herns Louis, founder and CEO of Eco-Motive