Engine development for cars so far has taken great technique in designing, powering, and mode efficiency. This is in regards to a V shape layout or construction engine for most current automobiles. One of the most V type engine layouts offering great quality today is a v8 engine. Particularly, V8 engines compressed the huge sizes of earlier engines that were utilized to propel massive vehicles.
Considering the sizes of ancient types of engines used in the early days, V8 engines nowadays are among the most convenient engines that provide sufficient speed even for huge vehicles. You may question why these V layout engines are named v8.
These engines include eight cylinders that are positioned on the crankshaft casing. The mounting of eight cylinders is in 2 banks each bank with four cylinders. Alongside that, there are eight pistons connected under one crankshaft. The 8 in v8 denotes eight times the pistons will fire the engine.
With the many cylinders in the v8 engine and pistons, you may be asking how many crankshafts there in the v8 engine. The truth is many, perhaps the most popular v8 engines have merely a crankshaft.
Why does a v8 have one or more crankshafts?
Internal combustion employs only one crankshaft and doesn’t depend on the number of cylinders. There can be more than one camshaft from a V engine to another, depending on the engine geometry. V8 engines use the crankshaft to assist in the transformation of linear motion into rotating movement. No additional crankshafts are required for the same action.
As before, the V8 engine has eight cylinders coupled to a single crankshaft, which means that there is no room for additional crankshafts. This explains why the majority of V8s have a single crankshaft configuration.
Types of v8 engine crankshaft
Both crankshafts can be used in the V8 engine. These include cross-plane, and flat-plane crankshafts.
1. Flat-plane cranks
In the design of hypercars and uber-expensive supercars, these cranks are most commonly used. Single crankpins or a four-cylinder inline cranking are used to increase multiple rods in these engines. Regardless of the order in which they fire, they always switch banks.
In order to achieve optimal scavenge fatigue, this alternation helps reduce header complexes crossing from bank to bank.
Because they don’t need large counterweights, flat plane cranks are more susceptible to secondary vibrations.
The advantages of using a flat-plane crank instead of a conventional crank
- They produce good balance due to their lightweight (creation less inertia)
- Tuning for maximum performance with headers is easy.
Vehicles with Flat Plane Cranks as an Engine Power Source
- Ferrari F430
- Lotus Esprit
- Porsche 918
- McLaren P1
2. Cross plane crank
Among hot rod engine models, this is the most frequent crankshaft. Cranks are named after their four crankpins, which are arranged at ninety-degree intervals between the two levels of the crankshaft. One hundred and eighty-degree layouts are commonly used to place the two outer pins. Observed from the end of the four points, set in ninety degree intervals, it forms a (+) shape.
In a normal firing sequence, cars numbered in even numbers are on the traveler’s side while the odd numbered barrels are on the opposite side. These cranks have two exhausts hurtling down one bank, giving them the sound of a muscle automobile.
Its rumble is worth it, despite the fact that its exhaust gases scavenging is less efficient than that of a flat aircraft. Its design necessitates a larger counterforce, which helps keep the engine in good balance.
Cross-plane crankshaft advantages
- The crankshaft is smooth
- Its performance is vibration-free
- It has a distinctive American car bubble
- They have more torque
A cross-plane crankshaft has a number of disadvantages.
- It is heavier
- Requires a bigger crankcase.
Cars that use a cross-plane crankshaft
LS, Coyote, and Hemi all use a cross plane crankshaft, as do a large number of other American muscle cars.
Crankshafts on a V8 engine are typically single, but multiple crankshafts are possible.
Among the several crankshaft designs used in V8 engines, there are just two that are particularly noteworthy.
Crossed and flat. For the most part, American V8 engines use cross-plane crankshafts, while high-end European automobiles and race cars use flat-plane crankshafts.