Subaru Unveils Small EFI Gasoline Engines

Posted on February 11, 2009

In a significant addition to its line of air-cooled gasoline engines for industrial, power generation and turf equipment applications, Subaru has recently taken the wraps off a new line of V-twin engines that incorporate electronic fuel injection. The line encompasses two models, the EH72 V-Twin and EH72 UTV, both of which are designed to reduce fuel consumption and emissions, while providing easier starting in a wide range of ambient temperatures.

Subaru engines are manufactured by Fuji Heavy Industries Ltd., and are sold and supported in North America by Robin America, Inc., Lake Zurich, Ill.

The open loop EFI system incorporates an electronic control unit that controls the function of the fuel injectors based on input from sensors that monitor factors such as manifold pressure, ambient temperature and throttle position. The result of this continuous relay of information is optimal engine performance in any and all conditions, the company said. Depending on application and other factors, the system also can deliver fuel economy improvements of between 11 and 25%, as well as reductions in engine exhaust emissions as high as 20%.

The engines feature a two-barrel manifold with a fuel injector for each cylinder. This allows each cylinder to operate independently of the other, which aids in fuel optimization and also in improving the engine’s efficiency and performance, the company said. Both models are available in a 653 cc or 720 cc configuration, with power outputs ranging from 20 to 27 hp. For applications with tighter space requirements, the EH72 UTV engine is available in a low-profile design in both the 653 cc and 720 cc displacements.

More information will be available in an upcoming edition of Diesel Progress.