Table of Contents
- 1 What does a counterweight do in an engine?
- 2 Why do pistons need to have a similar weight?
- 3 What is the primary purposes of counterweights and dampers in crankshafts?
- 4 Do I need to balance my pistons?
- 5 Why are hyper sport engines more powerful at the bottom?
- 6 How do you increase the torque of a motorcycle engine?
What does a counterweight do in an engine?
By placing counterweights on opposite sides of the Conrod journals of the crankshaft it is possible to compensate for outer moments, minimise internal moments and therefore reduce the amount of vibration and bearing stresses. The result is a smoother running, longer lasting engine.
Why do pistons need to have a similar weight?
Per DiBlasi, “The more weight you can pull out of the rod and piston assembly, the less stress you put on the bearings and journals. When revving engines “high,” the load and speeds can do damage at an exponential rate. “Lighter rotating mass allows the engine to respond quicker when spinning up.”
What is the primary purposes of counterweights and dampers in crankshafts?
Counterweights and dampers, although not a true part of a crankshaft, are usually attached to it to reduce engine vibration. The journal is supported by, and rotates in, a main bearing. It serves as the center of rotation of the crankshaft.
What are counterweights made of?
Counterweights are typically made of metals – with cast iron counterweights and concrete counterweights being the most often used ones. Steel, titanium, tungsten and a few metal alloys can also be used to manufacture high-quality counterweights.
What transfers piston movement to the crankshaft?
The connecting rod creates the link between the piston and crankshaft and thus transmits power. It converts the linear up and down movement of the piston into the circular movement of the crankshaft.
Do I need to balance my pistons?
If you are doing the rebuild using all factory components, then balancing is not absolutely necessary unless you want it to be the best it can be. If you are running after market components (a different crank, different rods, and/or different pistons), then ABSOLUTELY you want to balance that engine!
Why are hyper sport engines more powerful at the bottom?
The more extreme the engine is, the harder it is to produce torque that is available all around the RPM range. Hyper sport engines produce their peak torque way up in the RPM, which gives them the ability to use every GEAR up most. So they will be probably not too strong at the bottom RPM as in the HIGHER RPM range.
How do you increase the torque of a motorcycle engine?
The bigger the diameter of the crank OR piston travel/stroke (which are all similar in length) , the more torque will be generated. Another method is raising the compression ratio. The more compression you have in the combustion chamber, the higher the force on the piston and the higher is the torque.
Why does the torque output of an engine vary depending on application?
Every engine is designed and built for a specific purpose. Hence, its output varies depending upon its application. The torque output of an automotive engine mainly depends on its stroke-to-bore ratio, compression ratio, combustion pressures & speed in rpm.
What is the relationship between compression ratio and torque?
The more compression you have in the combustion chamber, the higher the force on the piston and the higher is the torque. That is exactly the reason why diesel engines, which compared to gas engines have almost as twice compression ratios, have LOTS of torque produced in ridiculously low RPM.