PRV engine
The PRV engine is a six-cylinder - V engine , which was manufactured by 1974 1998.
Development history
In 1966, Peugeot and Renault founded a consortium to develop a V-engine with eight cylinders . In 1971 Volvo joined the consortium. PRV is an acronym from the initials of the participants.
The first oil price crisis in 1973 severely restricted the market for eight-cylinder engines. Therefore, the engine was shortened by two cylinders and launched in 1974 as a six-cylinder V-engine. The cylinder head and engine block are made of aluminum, the wet liners are made of centrifugal casting . Each cylinder bank has a chain-driven, overhead camshaft that actuates the V-shaped hanging valves via rocker arms. The rocker arms on one side sit on a common axis above the camshaft.
The PRV engine was further developed during its construction period. The displacement was also varied (initially with Peugeot 2664 cm³ with 88 mm bore and 73 mm stroke in the 504 Coupé and 604 , later there 2849 cm³ (505); in the 605 Peugeot as well as Renault built in 2963 cm³ in the Safrane and Espace ).
By the end of production in 1998, a total of 970,315 units had been produced. In the former PRV factory La Française de Mécanique in Douvrin , a. V6 engines with 60 degree cylinder angle manufactured for Renault and PSA Peugeot Citroën .
A prototype of the 8-cylinder engine has been preserved in the factory and is also shown during factory tours.
technology
Since the cylinder bank angle of 90 ° (firing order 1–6–3–5–2–4) was retained and the opposing cylinders shared a common crank pin , the result was an unequal firing interval and rough running for a six-cylinder engine. A crank pin offset was only introduced in 1985, which resulted in smoother running. Volvo then began to withdraw from the consortium; from 1990, Volvo built a largely self-developed in- line engine .
In addition to the brands of the consortium members, the PRV engine was also popular with sports car manufacturers such as Alpine , De Lorean and Venturi due to its compact design and low weight of around 150 kg and was used in some vehicles from Lancia .
The engines were initially equipped with a register carburetor system consisting of a single carburetor Solex 34TBIA operated by the throttle cable and a vacuum-operated double carburetor Solex 35CEEI and in this configuration developed 136 HP (100 kW). From 1977 there was a version with Bosch K-Jetronic injection and 144 hp (106 kW). In 1981, PSA increased the output of the Talbot Tagora to 166 HP (122 kW) by making changes to the pistons and cylinder head with the help of two Weber triple carburettors while the displacement remained unchanged .
literature
- Classic car market. Buying advice for youngtimers of the sixties and seventies, special issue 12 (1992), VF Verlagsgesellschaft Mainz.
![[1]](http://img.xooimage.com/files67/3/5/2/prv-v8-0-2e9c35b.jpg){kind=link}