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| The Model BX91, which went into production in January, 1948, was a large diesel bus developed for use in public transportation, which was in a chaotic state in the post-war years. It was a revolutionary vehicle in its time, with a special chassis that made it possible to lower the floor, front shock absorbers, long-span rear springs, and an underslung body. It showed the way for domestic bus production after the war and is the foundation for bus design even today. A 1955 Model BX95 bus that was used in Sapporo has been preserved, and groups of bus enthusiasts have maintained numerous models in the BX series in working order. |
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| Storage location | : | ISUZU MOTORS KAWASAKI PLANT (3-25-1 Tonomachi, Kawasaki-ku, Kawasaki-shi, Kanagawa 210-8524) | |
| Year manufactured | : | 1948 | |
| Manufacturer | : | Diesel Jidosha Kogyo | |
| Classification | : | Designs/literature | |
| Current status | : | In storage: not open to the public | |
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| Vehicle name / Manufacture |
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| Vehicle name | : | Isuzu Bus |  |
| Model name | : | Isuzu Model BX91 | |
| Company name | : | Diesel Automobile Industries | |
| Year manufactured | : | 1948 | |
| Vehicle type/usage | : | Bus | |
| Location of actual vehicle/replica | : | None |
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| Model / Weight |
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| Style | : | Bonnet type bus | |
| Number of doors | : | 1 | |
| Passenger capacity | : | Seats: 48, crew: 2, total 50 | |
| Vehicle weight | : | 5000 kg |
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| Body / Size |
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| Structure | : | Steel frame and sheets | |
| Bumpers | : | Provided | |
| Step | : | Provided | |
| Overall length | : | 7840 mm | |
| Overall width | : | 2400 mm | |
| Overall height | : | 2700 mm | |
| Tire size | : | 34×7 |
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| Body / Axle / Driving / Others |
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| Frame | : | U-type section steel sheet ladder type | |
| Front axle | : | I-type reverse Elliott type, 1/2 leaf | |
| Rear axle | : | Full floating type, 1/2 leaf | |
| Wheelbase | : | 4300 mm | |
| Front tread x rear tread | : | 1520×1600 mm | |
| Vehicle height adjustment | : | None | |
| Steering | : | Worm and roller type | |
| Dampers | : | Front axle | |
| Stabilizer | : | None | |
| Driving stability devices | : | None |
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| Engine / Size / Power |
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| Engine name | : | DA43 type diesel engine | |
| Cooling/cylinder arrangement | : | Water-cooled/inline 6-cylinder | |
| Valve train | : | OHV | |
| Bore x stroke | : | 95×120 mm | |
| Displacement | : | 5100 cc | |
| Ignition system | : | Precombustion chamber type | |
| Max. power/r.p.m. | : | 85 hp/2500 rpm | |
| Max. torque/r.p.m. | : | 26 kgm/1200 rpm | |
| Supercharger | : | None | |
| Variable ignition system | : | None | |
| Fuel tank capacity | : | 90 L |
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| Drive-train |
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| Transmission | : | MT4 | |
| Drive system | : | FR4×2 |
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| Reference materials | : | Isuzu Jidosha Shashi; Isuzu Jidosha 50 Nenshi; Isuzu Dizeru Gijutsu 50 Nenshi; Busrama Express, No. 02 | |
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