The UD engine, a newly designed diesel engine, was released in January 1955. While maximizing the high power of a two-cycle engine, the UD engine employs uniflow scavenging to bolster scavenging efficiency and at the same time minimize noise and enable compact, lightweight design.
UD internationally recognized trademark
“UD” originally stands for the abbreviation of uniflow scavenging diesel engine. Since a variety of different engines were being developed at the time, the company decided to stamp the UD mark on its design drawings to differentiate it from the competition. Thereafter, in order to appeal the high engine performance of trucks equipped with a UD engine, the UD mark was put on the body of the vehicle. This mark became the international trademark for our company and led to its current name.