Английская Википедия:BMW OHV V8 engine
Шаблон:Infobox automobile engine
The BMW OHV V8 is an overhead valve V8 petrol engine produced from 1954 to 1965. It is BMW's first V8 engine, and BMW did not produce another V8 automobile engine until the BMW M60 in 1992.
The engine does not have an official model code,[1] therefore it is often identified through being the only overhead valve ("OHV") V8 engine produced by BMW, since all other BMW V8 engines use a dual overhead camshaft valvetrain.
Although not a direct replacement, in 1965 the six-cylinder BMW M30 engine took the OHV V8's place at the top of BMW's engine range.
Development
The BMW 501, which began production in 1952, was the first car produced by BMW after World War II. It was powered by the Шаблон:Convert BMW M337 straight-six engine[2]Шаблон:Rp[3] (based on the pre-war BMW M78 engine), which struggled with the Шаблон:Convert mass of the 501. The competing Mercedes-Benz W187 was powered by a larger Шаблон:Convert engine, which provided superior performance.[2]Шаблон:Rp
However, BMW had been developing a V8 engine since 1949,[2]Шаблон:Rp which was produced in Шаблон:Convert and Шаблон:Convert capacities. The design was finalized by Fritz Fiedler when he returned to BMW in 1952.[4]Шаблон:Rp
In 1954, the V8 engine was introduced (in 2.6 Litre form) in the BMW 502 - a higher specification version of the 501. In 1955, the 3.2 Litre version of the engine was introduced in the BMW 3.2, which was based on the 502.
Design
At the time, unique features of the BMW OHV V8 included the aluminium construction of the block and head, and a coolant passage design that increased the block stiffness over typical engines with wet cylinder liners.[2]Шаблон:Rp The layout of the engine is a 90° V8 with cast iron wet liners and stiffening webs between the cylinders.[2]Шаблон:Rp Apart from the materials, the engine was similar in overall design to the Cadillac OHV V8 and Oldsmobile V8 engine of the late 1940s, with a central camshaft using pushrods to operating overhead valves in crossflow cylinder heads with wedge-shaped combustion chambers.[4]Шаблон:Rp[2]Шаблон:Rp
The Шаблон:Convert versions have a bore of Шаблон:Convert and a stroke of Шаблон:Convert. Initially, this engine used a two barrel Solex 30 PAAJ carburettor, a compression ratio of 7.0:1[4]Шаблон:Rp[2]Шаблон:Rp and had a power output of Шаблон:Convert.
The extra capacity of the Шаблон:Convert version was achieved by increasing the bore to Шаблон:Convert. The larger engine initially used a single Шаблон:Convert Zenith carburettor, a compression ratio of 7.2:1 and produced Шаблон:Convert. The highest power output version of the BMW OHV V8 produced Шаблон:Convert and was used in the 3200 S released in 1961.[4]Шаблон:Rp
Versions
The following is a summary of the engine's versions.[5][6]Шаблон:Rp
| Engine | Displacement | Power | Torque | Years |
|---|---|---|---|---|
| M502/1 | Шаблон:Convert | Шаблон:Convert at 4,800 rpm |
Шаблон:Convert at 2,500 rpm |
1954–1961 |
| M502/100 | Шаблон:Convert at 2,500 rpm |
1961–1963 | ||
| M502/110, M533 |
Шаблон:Convert at 4,900 rpm |
Шаблон:Convert at 3,000 rpm | ||
| M506/1 | Шаблон:Convert | Шаблон:Convert at 4,900 rpm |
Шаблон:Convert at 2,500 rpm |
1955-1961 |
| M506/140, M534 |
Шаблон:Convert at 5,400 rpm |
Шаблон:Convert at 3,000 rpm |
1961-1963 | |
| M503/1 | Шаблон:Convert at 4,800 rpm |
Шаблон:Convert at 3,800 rpm |
1956-1961 | |
| M507/1 | Шаблон:Convert at 5,000 rpm |
Шаблон:Convert at 4,000 rpm |
1956-1959 | |
| M503/160, M532 |
Шаблон:Convert at 5,600 rpm |
Шаблон:Convert at 3,600 rpm |
1961-1963 |
M502/1
The original Шаблон:Convert version of the engine was developed for the BMW 502 and was introduced with it in 1954.[2]Шаблон:Rp[4]Шаблон:Rp The compression ratio is 7.0:1 and it uses a Solex 30 PAAJ carburettor.
In 1958, the 501 V8 and 502 were renamed the 2.6 and 2.6 Luxus respectively, with no changes in engine specification.[4]Шаблон:Rp
Applications:[5]
- 1954-1958 BMW 502 — Шаблон:Convert
- 1955-1958 BMW 501 V8 — Шаблон:Convert.[4]Шаблон:Rp
- 1958-1961 BMW 2.6 — Шаблон:Convert
- 1958-1961 BMW 2.6 Luxus — Шаблон:Convert
M502/100, M502/110 and M533
In the summer of 1961, the Шаблон:Convert engines were uprated with the Zenith 32 NDIX carburetor from the earlier Шаблон:Convert engines and a 7.5:1 compression ratio. With this upgrade, the 2.6 became the 2600 and the 2.6 Luxus became the 2600 L. These cars continued in production until December 1963[5]
In 1963, the 2600 L was produced with the gearbox directly mounted to the engine.[6]Шаблон:Rp This version of the engine is known as the M533.
Applications:[5]
- 1961-1963 BMW 2600 — Шаблон:Convert
- 1961-1963 BMW 2600L — Шаблон:Convert[6]Шаблон:Rp
M506/1
The Шаблон:Convert engine was developed in 1956, and was offered in the 502-based "BMW 3.2" sedan.[7][4]Шаблон:Rp The compression ratio is 7.2:1 and it uses a Zenith 32 NDIX carburettor.
Applications:
M503/1 and M507/1
BMW's V8 sports models, the 503 and 507, used M503/1 and M507/1 engines respectively, each with a pair of Zenith 32 NDIX two-barrel carburetors. With these, and a compression ratio of 7.5:1, the 503's engine produced Шаблон:Convert at 5000 rpm. The tuning of the 507's engine went further, with high-lift cams, a different spark advance curve, polished combustion chamber surfaces, and a compression ratio of 7.8:1, producing Шаблон:Convert at 5000 rpm.[4]Шаблон:Rp Both models were discontinued in March 1959.[4]Шаблон:Rp
The twin-carburetor engine from the 503 was used in the 502-based 3.2 Super from 1957 to 1961.[8]
- 1956-1960 BMW 503 — Шаблон:Convert
- 1956-1959 BMW 507 — Шаблон:Convert
- 1957-1961 BMW 3.2 Super[8] — Шаблон:Convert
M506/140, M503/160, M532 and M534
In 1961, the "BMW 3.2" and "BMW 3.2 Super" sedans were replaced by the "BMW 3200 L" and "BMW 3200 S" sedans, with the engines upgraded to the M506/140 and M503/160 respectively.[4]Шаблон:Rp The increase in power came from larger Zenith 36 NDIX carburetors and a compression ratio of 9.0:1.[9]
From 1963, the versions of the M503/160 and M506/140 with the gearbox directly mounted to the engine were called the M532 and M534 respectively.[6]Шаблон:Rp
Production of V8 sedans ended in 1963,[4]Шаблон:Rp but the engine from the 3200 S was used in the 3200 CS coupé from January 1962 to September 1965.[4]Шаблон:Rp
Applications:[4]Шаблон:Rp [6]Шаблон:Rp[4]Шаблон:Rp
- 1961-1963 BMW 3200 L — Шаблон:Convert
- 1961-1963 BMW 3200 S — Шаблон:Convert
- 1961-1965 BMW 3200 CS — Шаблон:Convert
Use by other manufacturers
Frazer-Nash Continental
Шаблон:Main Frazer-Nash was an importer of BMW cars into the United Kingdom and had used the Bristol straight-six engine, which was based on the BMW M328. The BMW OHV V8 was fitted to the Frazer Nash Continental model.[10] The Continental was intended to be available with either the 2.6 or 3.2-litre V8, but only a single prototype was ever made, with the 3.2 engine. It was the last car Frazer-Nash made.[11]Шаблон:Rp
Talbot-Lago America
Шаблон:Main The 1955 Talbot-Lago Sport was originally powered by Talbot's own 2.5 Litre four-cylinder engine. In 1957, due to reliability problems, Talbot switched over to the BMW OHV V8 and renamed the car the Talbot-Lago America.[12]
References
Шаблон:BMW automotive petrol engines: 1940s to 1960s
- ↑ Шаблон:Cite web
- ↑ 2,0 2,1 2,2 2,3 2,4 2,5 2,6 2,7 Шаблон:Cite book
- ↑ Шаблон:Cite web
- ↑ 4,00 4,01 4,02 4,03 4,04 4,05 4,06 4,07 4,08 4,09 4,10 4,11 4,12 4,13 4,14 Шаблон:Cite book
- ↑ 5,0 5,1 5,2 5,3 Шаблон:Cite web
- ↑ 6,0 6,1 6,2 6,3 6,4 6,5 6,6 Шаблон:Cite book
- ↑ Шаблон:Cite web
- ↑ 8,0 8,1 Шаблон:Cite web
- ↑ Шаблон:Cite web
- ↑ Шаблон:Cite web
- ↑ Шаблон:Cite book
- ↑ Шаблон:Cite web
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