An alternate from Kawasaki: company unveils gaseous-fueled version of FD750D engine targeting power generation - Engine Technology - Brief Article

Diesel Progress North American Edition, July, 2002

Kawasaki is currently completing internal and prototype testing of its first commercially available alternative fuel engine, which is targeted primarily at power generation applications. The engine is the first in Kawasaki's line that will be both CARB and EPA certified for alternative fuels, according to the Grand Rapids, Mich., manufacturer.

The new engine will be based on the current gasoline carbureted version of the 27 hp liquid-cooled FD750D engine. That engine is an OHV, horizontal shaft V-twin engine with a bore and stroke of 78 mm x 78 mm and an overall displacement of 745 cc. Since the engine is specifically targeted at the home standby, telecommunications, and cogeneration markets, it will have several key changes made to the base specification.

Significant changes concern cooling. Most generator sets are enclosed to protect the generator from the elements and to reduce noise. But the enclosure can present a challenge as to how to evacuate the heat generated by the engine and alternator. To address this challenge, Kawasaki has added a reverse rotation fan designed to more effectively exchange the air in the generator compartment.

To aid in maintaining proper oil temperatures during extended run time periods, Kawasaki has also added a liquid-cooled oil cooler. The company said the radiator has been sized 50 percent larger than the standard engine to provide the needed cooling capacity.

Concerning noise, Kawasaki said it's liquid-cooled engine offers as much as a 4 dB(A) reduction, owing to the fact that the water jacket around the combustion chamber absorbs combustion noise.

Other changes include a dedicated alternative fuel-style carburetor and a special mechanical governor with a steep governor curve to help maintain stable Hz on 3600 rpm generator applications. The initial engine setting will be for natural gas application with a possibility of conversion to LPG.

Compression has been increased from 8.5:1 to 9.0:1 in the alternative fuel specification engines. Other standard features include cast iron cylinder liners, pressurized lube system, electronic spark ignition, dual element air cleaner, oil pressure switch and water temperature switch.

The engines are currently undergoing testing at selected manufacturers and full availability is scheduled for August.

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