Mazda OHV engine

After an early flirtation with V-twin engines, Mazda's small cars of the 1960s were powered by OHVstraight-2 and straight-4 engines. This family lasted from 1961 until the mid-1970s. Today, Mazda's keicars use Suzuki engines. It was produced at the Hiroshima Plant in Hiroshima, Japan.

The engine was a two-stroke, water-cooled straight-twin engine used in the Mazda Chantez and Mazda Porterkei car and truck unique to Japan from 1972 until 1976. The displacement is 359 cc (21.9 cu in), producing 24.3 kW (33 PS) and 39.2 N⋅m (29 lb⋅ft) of torque.^[1]

The 358 cc (21.8 cu in)water-cooled OHV straight-four DA engine, used in the 1962 P360 Carol had a tiny 46 mm × 54 mm (1.8 in × 2.1 in) bore and stroke. This was one of the smallest production four-cylinder automobile engines in history, only beaten by Honda's356 cc (21.7 cu in) inline-four unit used in the T360 truck. The engine's small size was dictated by Japan's kei car rules which offered special status to vehicles with engines displacing less than 360 cc (22 cu in). Mazda's tiny OHV was the only four-cylinder in the class in the 1960s, but was outperformed by 2-stroke and I3 powerplants from other companies.

When fitted to the B360/Porter light truck and van, the engine received the DB engine code.^[2]

The 586 cc (35.8 cu in)RA engine was a larger version of the 358 cc (21.8 cu in) engine 54 mm × 64 mm (2.13 in × 2.52 in). It was used in the 1962-1964 P600 Carol and produced 28 PS (21 kW) and 4.2 kg⋅m (41 N⋅m; 30 lb⋅ft) of torque.

The SA, a larger 782 cc (47.7 cu in) engine powered the 1963-1967 Mazda Familia and the 1966 Mazda Bongo. Bore and stroke was 58 mm × 74 mm (2.28 in × 2.91 in) for this water-cooled OHV engine. In the Familia, the SA produces 42 PS (31 kW) at 6,000 rpm, while the Bongo received a detuned version with 37 PS (27 kW) at 5,000 rpm.^[3] For 1966 and 1967, the max power of the SA mounted in the Familia increased to 45 PS (33 kW) (at the same engine speed), by increasing the compression ratio from 8.5:1 to 9.0:1.^[4]

The 1.0 L (987 cc)PB engine, a separate development, used a square 68 mm (2.68 in) bore and stroke. It was a water-cooled OHV engine and first powered the 1967 Mazda Familia 1000. Output ranged from 52 to 58 PS (38 to 43 kW), depending on the application.

• Jan 1967 - Feb 1968 Mazda Familia 1000 Sedan, Van (Mazda 1000)
• Nov 1967 - 1973 Mazda Familia 1000 (Mazda 1000)

One of the more-popular variants of this family was the 1.2 L (1,169 cc)TB unit found in the Familia/1200. Bore and stroke was 70 mm × 76 mm (2.76 in × 2.99 in). The 1200 Coupé used a Hitachi/Stromberg carburettor and 8.6:1 compression to produce 68 PS (50 kW) at 6000 rpm and 9.6 kg⋅m (94 N⋅m; 69 lbf⋅ft) at 3000 rpm.^[5] This engine was built from 1968 until 1970 for passenger cars, until 1971 for the Familia Truck.

El motor UA (y el similar UB , para su uso en camiones de tres ruedas) es un motor de cuatro cilindros en línea de  1484 cc refrigerado por agua con válvulas en cabeza . Tiene un diámetro de 75 mm (3,0 pulgadas) y una carrera de 84 mm (3,3 pulgadas) . Instalado en el camión de cuatro ruedas D1500 original de 1960, equipado con un carburador de tiro lateral, tiene una potencia máxima de 60 CV (44 kW) a 4600 rpm y un par máximo de 10,4 kg⋅m (102 N⋅m; 75 lbf⋅ft) a 3000 rpm. La potencia del B1500 se mantuvo igual, pero en la segunda generación del B1500, una culata y válvulas mejoradas, junto con un carburador de tiro descendente, aumentaron la potencia máxima a 72 CV (53 kW) a 5200 rpm y un par máximo de 12,0 kg⋅m (118 N⋅m; 87 lbf⋅ft) a 3400 rpm.                  

UA :

• Marzo de 1960 – 1965: Mazda D1500 (DUA12)
• 1961-1965: Mazda B1500 (BUA/BUB)
• 1965-1971: Mazda B1500/Proceed (BUD61)
• 1965-1977: MazdaKraft DUD9/DUE9

UB :

• 1962-1971: Mazda T1500

El motor VA apareció por primera vez en el Mazda D2000 de abril de 1962. Con un diámetro y carrera de 82 mm × 94 mm (3,23 pulg. × 3,70 pulg.) , la cilindrada es de 2,0 L (1985 cc) . La potencia original era de 81 CV (60 kW) a 4600 rpm, ^{[ 6 ]} pero los modelos posteriores tienen 92 CV (68 kW) a 5000 rpm. ^{[ 7 ]}              

• Abril de 1962-1964 Mazda D2000, D2000 Microbus (DVA12) ^{[ 3 ]}
• 1964 - 1973 Autobús ligero Mazda (AEVA) ^{[ 3 ]}
• Enero de 1964 - 1971 Mazda E2000 (EVA12/32) ^{[ 3 ]}
• Mazda Parkway 18 (EVK15)
• 1971 - 197? Mazda Titan (EVB12) ^{[ 7 ]}
• 1973 - 197? Mazda Parkway 26 (AEVB)

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• Motor Wankel de Mazda