The vertical plane is a typical V8 structure in American vehicles. The included angle between each crank in a group (every four cranks) and the previous crank is 90, so when viewed from one end of the crankshaft, it forms a vertical structure. This vertical plane can achieve a good balance, but it needs a heavy counterweight iron. This V8 engine with vertical structure has a large moment of inertia, so the acceleration is low, and it can't accelerate or decelerate quickly compared with other types of engines. The ignition sequence of V8 engine with this structure is from beginning to end, so it is necessary to design an additional exhaust system to connect the exhaust pipes at both ends. This complicated and almost bulky exhaust system has become a big headache for designers of single-seat racing cars.
Plane indicates that the crank is 180. Their balance is not so perfect, unless the balance shaft is used, the vibration will be great. Because there is no need for counterweight iron, the crankshaft has low weight and inertia, and can have high speed and acceleration. This structure is very common in 1.5 liter modern racing car Coventry Climax. This engine evolved from a vertical plane to a plane structure. Vehicles with V8 structure include Ferrari (Dino engine), Lotus (Esprit V8 engine) and TVR(Speed 8 engine). This structure is very common in racing engines, the most famous of which is Cosworth DFV. The design of vertical structure is very complicated. For this reason, most of the early V8 engines, including Desdions-Burton, peerless, Cadillac, etc., were designed in plane structure. 19 15 years, the design idea of vertical plane appeared at an American automobile engineering conference, but it took 8 years to get the assembly. Cadillac and Peerless (he hired a former Cadillac mathematician to work for him) applied for patents on vertical design at the same time, and both parties promised to share their ideas. Cadillac launched their "compensated crankshaft" V8 engine in 1923, and used the peerless "balanced eight" in 1924+0 1 year.