Standard crankshaft
The most common type of engine crankshaft is a standard crankshaft. It has a central bearing and five main bearings, among other things.
The central bearing facilitates oil flow and protects the crank from wear. The five main bearings distribute weight evenly and help to reduce vibration throughout the engine.
Double crankcase
Engine crankshafts are classified into two types: double and single. The double crankcase is more common in larger engines, whereas the single crankcase is more common in smaller engines. Here's a breakdown of each type:
Single Crankcase: A single crankcase is found in smaller engines, typically those with lower power levels. It has one crankcase half that houses the engine's pistons and connecting rods. This design reduces weight and overall size, but it may result in decreased durability due to less support for engine components.
Double Crankcase: Because it provides more support for the engine components, the double crankcase is more common in larger engines. It consists of two crankcases linked by a gearbox. This design improves strength and reliability while increasing overall weight and complexity.
V-engine
There are three basic types of engine crankshafts, each with its own set of advantages and disadvantages. The V-engine, which is used in gasoline engines, is a classic example of the type. The crankshaft in a V-engine is located between the cylinders. Because the pistons can travel further than if they were located at the front of the engine, this arrangement makes the engine more compact and efficient. V-engines, on the other hand, suffer from difficult-to-control vibrations.
The W-engine is similar to the V-engine except that the crankshaft is located at the engine's rear. This arrangement reduces vibration, but it necessitates a different type of carburetor (one specifically designed for a W-engine) and can result in heavier engine weights.
The SOHC (single overhead cam) engine is the most common type of crank shaft found in modern vehicles. This design incorporates two camshafts, one above and one below the pistons, for smooth operation and reduced vibration.
Flathead engine
There are three main types of engine crankshafts, each with its own set of advantages and disadvantages. Each type has been used in various types of engines throughout automotive history, so knowing what you're looking for when selecting one is critical.
The flathead engine, which dates back to the early 1900s, is the oldest type of engine. It has a single crankshaft that rotates on an axis parallel to the crankcase of the engine. Because there is no accessory gearbox or oil pump to complicate things, this type of crankshaft is simple and efficient, but it can be difficult to design and manufacture.
The V8 engine, which was originally designed with a flathead crankshaft, is still one of the most popular engine types today. This engine has eight separate crankpins (as opposed to the flathead's single pin), which allows for more torque and power. However, because there are so many crankpins, this type of crankshaft is often heavy and difficult to construct.
The V6 engine has six cylinders rather than eight like the V8, which means it is more fuel efficient.
