Posted April 14, 2015

Kohler Introduces New Tier 4 Final Engine

Kohler Engines has introduced the 3.4 liter KDI (Kohler Direct Injection) Tier 4 final engine designed for heavy-duty commercial applications requiring enhanced power and torque. The KDI 3404 achieves clean combustion, optimized fuel consumption and enhanced power without the use of a diesel particulate filter (DPF).

KDI3404_KOHLER_Engines_Angled-copy“The KDI 3404 significantly broadens our ability to meet the power requirements of OEMs and end users,” said Jeff Wilke, product manager for diesel engines at KOHLER. “The KDI 3404 is an impressively compact engine that delivers maximum power and torque while reducing fuel consumption and emissions. This is the most powerful engine we’ve ever manufactured – it’s an ideal power source for larger commercial applications in the construction, industrial and agricultural markets.”

Kohler's KDI line includes eight Tier 4 Final engines that achieve emission compliance without a DPF due to a number of innovative design features, including the company's direct injection system, cooled exhaust gas recirculation (EGR) and diesel oxygenated catalyst (DOC). An integrated high-pressure common rail system (CSR) uses 29,000 psi to deliver better atomization of fuel, improved fuel consumption and a reduction in emission particulates. All of these advancements are delivered in a compact engine design that will fit existing and new equipment designed by OEMs. 

The KDI 3404 is available in four ratings, ranging from 74 to 134 HP with peak torques from 276 to 369 lb. ft. To enhance power and torque, the engine’s mapping program within the Electronic Control Unit (ECU) monitors and manages power output in varying conditions by injecting fuel multiple times into the combustion cycle.

The compact and lightweight design of the engine – along with the absence of a DPF – gives equipment manufacturers more flexibility in design and engine integration. End-users also benefit from reduced maintenance, better heat management and enhanced fuel efficiency.