what is the function of piston in ic engine
What is Piston The piston transfers combustion pressure to the connecting rod and crankshaft. It should hold the piston ring and piston pin while working on the cylinder. Pistons are usually made or forged from an aluminum alloy. Cast pistons are relatively smooth and are used in slow-speed, low-performance engines. function of piston in ic engine Forged pistons are commonly used in today’s fuel-injected, turbocharged and diesel engines. These engines expose the pistons to very high compressive loads, which can break cast aluminum pistons. The piston must withstand incredible punishment under extreme temperatures. Examples of conditions a piston must encounter at normal highway speeds include: Function of piston in ic engine Pistons play an important role in automobile engines, including spark ignition gasoline engines and compression ignition diesel engines. The process of these two internal combustion engines is different but they use pistons. The functions of a piston in an automobile engine are given below: The main function of the piston is to transfer the power output of a small burst of gas in the cylinder to the crankshaft. function of piston in ic engine It provides rotational motion to the flywheel. It moves forward so that the gases are compressed and explode as it moves backward. The piston has a pin called the piston pin which allows the gas in the chamber to escape. A connecting rod attached to the bottom of the piston allows the mechanical work to be changed. Pistons help move the air-fuel mixture during the combustion cycle. Pistons use oil control rings to help control the flow of oil to the cylinder walls. As the piston moves from the top to the bottom of the cylinder (or vice versa), function of piston in ic engine it accelerates from a stop to about 60 mph at the midpoint, and then slows to a stop again. It does this about 80 times per second. The piston must with stand a pressure of 1,000 psi in its head Temperatures above 600°F. The structural components of a piston are the head, skirt, ring grooves, however, not all pistons look like the normal piston shown here. Some have different shaped heads. The piston head is the top of the piston and is exposed to combustion heat and pressure. function of piston in ic engine This field must be dense enough to withstand these forces. The working volume should match the combustion chamber volume for complete combustion. Piston material Cast iron can earliest material used to make pistons. However modern machines benefit from lighter materials for mechanical balance. Good pistons should be able to withstand the engine’s combustion temperatures. Alloys such as Y alloy and aluminum can particularly used to achieve such properties. function of piston in ic engine Pistons can made from aluminum alloy with casting process. Some pistons used in racing vehicles require higher strength and fatigue life, which can why they can forged. function of piston in ic engine Billet pistons can also used in racing engines because they can independent of the size and architecture of available forges, allowing for last-minute design changes. However, it is usually invisible to the naked eye. Types of pistons Below are three types of pistons: Dish piston: A dish piston can shaped like a plate with slightly curved outer edges. function of piston in ic engine It is easy and simple and gives less hassle to engineers. It can often used in boosted applications that do not require a high-lift camshaft or high compression ratios. Flat-top piston: The flat-top type of piston has a flat top. It has less surface area, which allows it to generate more power. This is perfect for creating efficient combustion. Flat-top pistons produce more detonation in the chamber, but compression may be too high for small combustion chambers. Dome Piston: The concept of a dish piston is the exact opposite of a dish type. function of piston in ic engine Middle bubble to increase surface area remaining on top of piston. Well, more surface area means less compression, while more compression means more power generation. The combustion chamber has a maximum limit to what it can handle, so reducing the compression ratio is the best way to avoid breaking the engine. Function of piston Piston skirt is the edge of the piston below the end ring. Without a skirt, the piston can bend and jam in the cylinder. A slipper skirt can formed when a portion of the piston skirt can removed below the piston ends. The slipper skirt provides clearance between the piston and the crankshaft counterweight. This allows the piston to slide into the cylinder without hitting the crankshaft. A straight skirt with a flat bottom, this style is no longer common in automotive engines Piston ring grooves can machined slots in the piston for the piston rings. function of piston in ic engine The top two grooves hold compression rings. The lower piston groove holds the oil ring. The piston oil hole in the lower ring groove allows oil to pass through the piston and into the cylinder wall. The area between and above the piston ring lands ring groove. They separate and support the piston rings as they slide over the cylinder. Piston boss is a reinforced part around the piston pin bore. The piston pin must be strong enough to withstand heavy loads. Function The piston pin can drilled through the pin boss for the piston pin. function of piston in ic engine It is slightly larger than a piston pin. The piston pin, also known as the wrist pin, allows the piston to oscillate on the connecting rod. The pin fits through holes in the small end of the piston and connecting rod. Piston clearance is the clearance between the edges of the piston and the cylinder wall. The clearance allows a lubricant film to form between the piston and the cylinder. It also allows the piston to expand as it heats up. The cam-ground piston (Figure 3-15) looks … Read more