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Renault Billancourt engine
The Billancourt engine was an automotive engine designed by Renault for the Renault 4CV, used subsequently until 1985. It later received the internal code "B", for Billancourt. The "sport" version is called Ventoux engine.
The engine is liquid-cooled, with four cylinders in line. It is also characterised by its three main bearing design and its piston stroke of 80 mm (3.15 in). It has a cast-iron block, aluminium cylinder head and uses a lateral camshaft to operate overhead valves, which also operated the fan belt on its other end. In June 1940, Louis Renault appointed Fernand Picard, who became deputy technical director in the automobile engine department. During World War II, he participated in the study of a small car: the future 4CV. Its engine was ready in 1942 and a year later, it first turned a wheel. Renault replaced this engine with the Cléon-Fonte engine, a completely new design.
This engine designed by Fernand Picard was produced from 1947 to 1985, in displacements of 0.6 L (603 cc), 0.7 L (748 cc), 0.8 L (782 cc), and 0.8 L (845 cc). These differences were carried out by changing the cylinder bore diameter
Commercialized in 1947 with the Renault 4CV, the first version of the "engine Billancourt" was a 0.8 L (760 cc) of 17 hp (13 kW) SAE. In 1950, a 21 hp (15 kW) SAE version was fitted to the Renault 4CV Grand Luxe, produced only in 1950.
In October 1950, the 0.7 L (747 cc) replaced the 0.8 L (760 cc). The slightly lower displacement was obtained by slightly reducing the size of the bore from 55 to 54.5 mm (2.17 to 2.15 in), while the stroke remained unchanged. This change was decided by the leaders of Renault in order to be able to use this extremely undersquare engine in competitions where it was necessary to stay below 0.8 L (750 cc) to homologate the car in its category. This new displacement offered six power levels, from 24 to 35 hp (18 to 26 kW) SAE, all of 4 fiscal horsepower.
In 1971, the 0.8 L (782 cc) appeared with an increased bore, from 54.5 to 55.8 mm (2.15 to 2.20 in), always with an unchanged stroke of 80 mm (3.15 in). This engine was proposed in both variants developing 27 and 36 hp (20 and 26 kW). The less powerful one was mounted under the hood of the Renault 4L produced between 1971 and 1980, while the variant developing 36 hp (26 kW) was used on the Renault 5 produced between 1972 and 1976.
The highest engine capacity of the Billancourt engine appeared in 1956 at the launch of the Renault Dauphine, one of the main models equipped with this engine; it displaces 0.8 L (845 cc). The rear-engine version was codenamed 670. It also equipped the Renault 4 from 1964 and the Renault 6 base model; in these front-engined, front-wheel drive applications the engine was codenamed 800. The bore was increased to 58 mm (2.28 in). The power ranged between 30 and 38 hp (22 and 28 kW) SAE for standard (non-Gordini) engines.
The fourth and final version developed 38 hp (28 kW) maximum power and 57 N⋅m (42 lbf⋅ft) torque at 2,500 rpm. This was made possible by machining the cylinder head, with new valves and valve seats, as well as improvements in engine cooling. It was fitted on the Renault 5L from 1977 to 1984. Later models were called B1B, reflecting Renault's new engine numbering system.
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Renault Billancourt engine
The Billancourt engine was an automotive engine designed by Renault for the Renault 4CV, used subsequently until 1985. It later received the internal code "B", for Billancourt. The "sport" version is called Ventoux engine.
The engine is liquid-cooled, with four cylinders in line. It is also characterised by its three main bearing design and its piston stroke of 80 mm (3.15 in). It has a cast-iron block, aluminium cylinder head and uses a lateral camshaft to operate overhead valves, which also operated the fan belt on its other end. In June 1940, Louis Renault appointed Fernand Picard, who became deputy technical director in the automobile engine department. During World War II, he participated in the study of a small car: the future 4CV. Its engine was ready in 1942 and a year later, it first turned a wheel. Renault replaced this engine with the Cléon-Fonte engine, a completely new design.
This engine designed by Fernand Picard was produced from 1947 to 1985, in displacements of 0.6 L (603 cc), 0.7 L (748 cc), 0.8 L (782 cc), and 0.8 L (845 cc). These differences were carried out by changing the cylinder bore diameter
Commercialized in 1947 with the Renault 4CV, the first version of the "engine Billancourt" was a 0.8 L (760 cc) of 17 hp (13 kW) SAE. In 1950, a 21 hp (15 kW) SAE version was fitted to the Renault 4CV Grand Luxe, produced only in 1950.
In October 1950, the 0.7 L (747 cc) replaced the 0.8 L (760 cc). The slightly lower displacement was obtained by slightly reducing the size of the bore from 55 to 54.5 mm (2.17 to 2.15 in), while the stroke remained unchanged. This change was decided by the leaders of Renault in order to be able to use this extremely undersquare engine in competitions where it was necessary to stay below 0.8 L (750 cc) to homologate the car in its category. This new displacement offered six power levels, from 24 to 35 hp (18 to 26 kW) SAE, all of 4 fiscal horsepower.
In 1971, the 0.8 L (782 cc) appeared with an increased bore, from 54.5 to 55.8 mm (2.15 to 2.20 in), always with an unchanged stroke of 80 mm (3.15 in). This engine was proposed in both variants developing 27 and 36 hp (20 and 26 kW). The less powerful one was mounted under the hood of the Renault 4L produced between 1971 and 1980, while the variant developing 36 hp (26 kW) was used on the Renault 5 produced between 1972 and 1976.
The highest engine capacity of the Billancourt engine appeared in 1956 at the launch of the Renault Dauphine, one of the main models equipped with this engine; it displaces 0.8 L (845 cc). The rear-engine version was codenamed 670. It also equipped the Renault 4 from 1964 and the Renault 6 base model; in these front-engined, front-wheel drive applications the engine was codenamed 800. The bore was increased to 58 mm (2.28 in). The power ranged between 30 and 38 hp (22 and 28 kW) SAE for standard (non-Gordini) engines.
The fourth and final version developed 38 hp (28 kW) maximum power and 57 N⋅m (42 lbf⋅ft) torque at 2,500 rpm. This was made possible by machining the cylinder head, with new valves and valve seats, as well as improvements in engine cooling. It was fitted on the Renault 5L from 1977 to 1984. Later models were called B1B, reflecting Renault's new engine numbering system.