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In a diesel–hydraulic multiple unit (DHMU), a hydraulic torque converter, a type of fluid coupling, acts as the transmission medium for the motive power of the diesel engine to turn the wheels. Some units feature a hybrid mix of hydraulic and mechanical transmissions, usually reverting to the latter at higher operating speeds as this ...
40 (Ten 4-car units) 1984 Buffets withdrawn in 1970 and a DMBS and DMSK withdrawn in 1977 and 1979 respectively. All Class 124: BR Swindon 'Trans-Pennine' 2 × Albion 230 bhp (172 kW) mechanical 1960 Eight 6-car sets, plus 3 spare cars 1972 (3) 1975 1979–1984 Class 125: BR Derby 'Lea Valley' 2 × Rolls-Royce C8NFLH 238 bhp (177 kW) hydraulic ...
Nominal input power of hydraulic transmission - 450 kW; oil supply - 95 L, maximum torque - 1200 N • m; length, width, and height of hydraulic transmission - 1070 × 1055 × 756 mm. The cooling unit of the engine, which in the previous diesel train was located in the undercarriage space, was moved to the roof of the main cars.
The Dongfeng diesel multiple unit, also known as the Dongfeng motor coach, [Note 1] and NM1, was a DMU of Ministry of Railways, and was also the first diesel-hydraulic power car and double deck passenger car of China, built by Qingdao Sifang in 1958. The train consisted two motors and four double deck trailers, and was designed for short ...
Each Nippon Sharyo DMU is powered by one Cummins QSK19-R [4] diesel engine with hydraulic transmission and regenerative braking, and meets US EPA Tier 4 emission standards. . Structurally each DMU is FRA Tier 1 compliant with crash energy management features, making it capable of operating on the same line with standard North American freight trains without the need of special wai
From the early 1980s, the remaining Rolls-Royce and GM powered units, along with Cummins powered NPF 638, were fitted with 335 hp Cummins NTA-855-R4 engines and Voith T211r transmissions. This drive train proved highly successful and was also deployed in the 900 Class power cars.
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