German engine manufacturer Hatz has introduced a 56- to 75-hp diesel engine that meets EPA Tier 4 Final emission standards using exhaust-gas recirculation and a maintenance-free diesel oxidation catalyst.
Hatz says that applications for the new 4H50TIC diesel include powering mobile equipment such as aerial work platforms and telehandlers.
Available since January of this year, the Hatz H-Series diesel engine is compact, durable, fuel efficient, and weighs just 381 lbs. The 2-liter, four-cylinder, water-cooled 4H50TIC is equipped with the latest Bosch common-rail technology, intercooler, turbocharger, oxidation catalyst (DOC), and exhaust gas recirculation (EGR). It delivers 177 lb.-ft. of torque at 1,600 rpm and up to 75 hp at 2,800 rpm.
The exhaust after-treatment is a durable diesel oxidation catalyst (DOC) that works without electronics, is maintenance free, and is built to last for the life of the engine.
Designed for durability with low maintenance, the 4H50TIC features starter protection built into the control unit, maintenance-free hydraulic automatic valve adjustment, and pre-heating system for cold starts down to -8° F. The engine maintenance interval is 500 hours.
One of the key factors contributing to the high power density of the 4H50TIC is the Bosch Off-Highway 26,000-psi common rail system with three injections of fuel per working cycle. Hatz says the 4H50TIC engine sets standards with a specific fuel consumption of just 205 g / kWh at its best point, a fuel savings of about 30%, compared to an EU Stage II engine.
For reduced exhaust emissions, an EGR mixing nozzle evenly distributes the recirculated exhaust gas and fresh combustion air to all four cylinders. Thus, together with the aforementioned injection technology a very good exhaust quality can be achieved which ensures that the 4H50TIC is only equipped with an oxidation catalyst.
Reduced internal friction also contributes to efficiency and durability. The design eliminates use of a timing belt and timing chain by driving the valve train with a gear, push rods, and rocker arms.
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