In fact, the VR engine was not created by the public. The earliest manufacturer equipped with this kind of engine is Lancia in Italy, and its Chinese name is Lancia. As early as the 1920s, they introduced Lambda models with an included angle of 13 degrees, and then successively introduced Appia models with an included angle of 10 degrees. It was not until 1976 that the VR4 engine retired from the historical stage. VR4 engine with an included angle of 13 degrees Volkswagen began to design and develop VR engines in the 1980s. It was not until 199 1 that the first generation VR6 engine was mounted on the third generation Passat, with a displacement of 2.8L and a maximum power of 178 horsepower. Subsequently, this kind of engine with special cylinder arrangement was widely used in Volkswagen models, and two kinds of displacements of 3.2L and 3.6L were introduced. Among them, 3.2L VR6 is used for R32 and Audi TT of Brother Factory, and 3.6L models are used for R36, Touareg and Phaeton.

Variable valve timing system

In the early SOHC, VR6 with two valves used different air inlets to control the air flow rate. Although the design of two valves per cylinder temporarily solves the problems of heat dissipation and complex structure, the disadvantages of two valves are also very obvious, that is, carbon deposition is easy to occur and fuel economy is poor. At the same time, because the camshaft must control the opening and closing of the intake valve and the exhaust valve at the same time, it is impossible to apply the variable valve timing system. Therefore, it is imperative to upgrade it. In fact, before the second generation VR6 with 4 valves per cylinder was officially launched, Volkswagen engineers had already started to redesign the cylinder head.

In the research and development process of VR6, Volkswagen engineers cut off a cylinder based on it, thus deriving the VR5 engine, and the displacement has also dropped to 2.3L The V-shaped arrangement of odd cylinders is really incredible, but it is simpler in structure than VR6. This engine was used in Bora, Beetle and Passat at that time.