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A historical review of Japanese turbocharged diesel engines for heavy duty vehicles is described, and newly developed turbocharged diesel engines of HINO are introduced. The design features of these engines include new turbocharging technologies such as highly backward curved impeller for compressor blade, variable controlled inertia charging and waste gate. Laboratory and field test results demonstrated better fuel economy and improved low speed and transient torque characteristics than the predecessors. Several operational experiences, technical analysis and reliability problems are discussed.

The friction pattern on the chamfers of sleeves and dog gears is a combination of peeling and adhesive wear caused by the formation and propagation of fine cracks. The effect of additional elements on wear were checked by making a test apparatus capable of performing evaluations on test pieces equivalent to those using actual parts. The results showed that the addition of B, Ti-Nb helped improve wear resistance. This is attributed to enhanced toughness and reduced peeling due to the formation of a texture. A 45% reduction in wear was achieved in actual parts tests on steel with added B, Ti-Nb.

The Advanced Safety Vehicle (ASV) project phase 2 was organized by the Japanese ministry of lands, infrastructures and transport in 1996 as a five year project. Hino Motors participated in the project and developed an intelligent truck “HINO ASV-2”. HINO ASV-2 was equipped with safety systems for accident prevention and accident avoidance, which were most effective in reducing accidents in freight transport. These intelligent systems aimed to reduce driving fatigue, minimize the chance of driver’s mistake, and prevent the occurrence of accidents. Human-machine interface, and front underrun protection device were also studied. Through the development of the ASV systems, the feasibility and basic functions of these systems were studied. Further development is necessary to implement the ASV systems in production vehicles.

Thai Hino Industries, one of Hino Motors Ltd.'s major overseas joint ventures, has been manufacturing trucks since it was founded over 20 years ago. During that time, Hino Motors, in cooperation with the Government of Thailand, has increasingly localized the production of vehicle component parts. Today, calculated by item, 45% of all such parts are produced by Thai Hino Industries and its local suppliers. As a result, Thai Hino Industries has grown into a company which makes significant contributions not only to the automotive industry but to Thailand's industrial sector as a whole. Localization of Thai Hino progressed from the transfer of vehicle assembly know-how, to the establishment of feasible guidelines for parts production localization, then on to the transfer of production engineering know-how for flexible manufacturing systems, and finally to the transfer of production engineering know-how for press dies.