Commitment to reducing environmental impact
We are one of the first companies to pay attention to environmental issues and to achieve superior results. We are especially proud of these many successes protecting the environment. The Urea SCR System drew attention from all over the world for being the first engine to meet the most stringent global standards for emissions. Environmental issues are now a universal problem that all companies need to manage. We continue to take an active approach to environmental issues with enhusiasium; re- examining materials and manufacturing processes, joining local activities, developing new environmental technology and promoting communication activities for exchanging information with regards to environmental concerns.
Environmental and fuel efficiency requirements are becoming stricter. To optimize environmental performance, fuel efficiency, and power output in the medium duty class, UD Trucks started developing a next-generation engine. The resulting GH7 engine, with a displacement of 7.0 L (427 c.i.), produces high horsepower and torque at low engine rpm for higher fuel economy. The engine incorporates a high -pressure common rail fuel injection system and a high-boost pressure variable nozzle turbocharger (VNT). Fuel efficiency is outstanding, with no compromise in power output or torque. UD Trucks achieved this performance by modifying the combustion chamber shape, reducing friction, and improving electronic control.
Extended change intervals for engine oil, oil filter, fuel filters, engine antifreeze, and other consumables reduce vehicle-operating costs. This new engine is perfect for today’s medium duty trucks. Also, this is UD Trucks’ first medium duty class to come with an Exhaust After treatment System (EATS), a urea-SCR catalyst, which was pioneered by UD Trucks, together with a proprietary Diesel Particulate Filter (DPF). This combination reduces NOx and “Particulate Matter” emissions. Higher fuel economy contributes to lower CO2 emissions. The environmental and economic performance of the UD Truck leads the industry.
Reduced Carbon Foot Print
7,000 lbs less than the US07 EPA standard
Improved Fuel Consumption
4 - 5.5% Fuel Cost Savings with SCR and DPF
Service Interval Extension
Oil change every 25,000 miles instead of every 15,000 miles*.
Less time in the shop and more time on the road.
Less fuel consumption and less down time
*Based on use and driving conditions
The diesel engine has high thermal efficiency and consumes less fuel, so CO2 emissions are far lower than a gasoline engine. However, in diesel engines particulate matter (PM) and NOx emissions pose conflicting requirements: PM tends to be produced at low temperature and during incomplete combustion, while NOx tends to be produced at high temperature and during complete combustion, making it difficult to reduce both PM and NOx. In 2004, however, UD Trucks developed an advanced diesel exhaust emissions reduction system, which combines ultra-high pressure fuel injection with a urea-SCR catalyst.
The system not only reduces both PM and NOx, but also fuel consumption and hence CO2 emissions. The GH7 engine incorporates a high-pressure common rail system achieving high combustion efficiency for reduced PM. In addition, NOx emissions are cut by the urea-SCR catalyst that decomposes NOx. The DPF allows PM to be burned steadily at low temperature, minimizing the risk of abnormal combustion and damage to the catalyst.
In addition, the after-treatment hydrocarbon injection (AHI) increases the exhaust temperature to assist the DPF during regeneration. The exhaust emissions system is located at the muffler to save space. In addition to effective NOx decomposition achieved by adding precisely controlled amounts of DEF, the engine complies with the new stricter emissions regulations (US10 EPA/CARB). The entire power train has been redesigned to maximize environmental performance and fuel efficiency.