Why bore engine

Abrasives typically used in honing include silicon carbide and aluminum oxide. These abrasives are inexpensive and versatile. Lately, performance engine builders have increasingly turned to diamond abrasives. Mechanics like these abrasives better because they can hold a cutting edge longer than other forms of abrasives. Getting honing right is important. A bad honing job may result in improper seating by piston rings that will inhibit oil flow, along with some other negative consequences.

Honing is difficult. The average shade-tree mechanic does not have the tools or technical skills to reproduce an OEM cylinder bore finish. In parts of the country with emissions testing, this can be a problem, as improperly honed cylinders might result in a vehicle failing an emissions test.

Balancing your engine is another important part of rebuilding or modifying an engine. In short, balancing your engine equalizes the reciprocating and rotating forces happening in your engine, allowing it to run smoother and enjoy greater utility and longevity. Balancing the engine helps to manage the impact of these reactions. One of the primary tasks involved in engine balancing is equalizing the weights of various parts. When balancing the engine, mechanics precisely weigh parts to determine which piston and rod are the lightest.

Mechanics then machine the other rods and pistons to make them equal to the lightest one in the set. Next, rotating and reciprocating weights are evaluated in isolation from one another. This device can be adjusted according our required ratio of air-fuel mixture. And this simply delivers right amount of mixture proportion in to the combustion chamber for further combustion. Thank you for the kind words. We have been fortunate in assembling a team of experts from around the world to develop our fuel-efficient and low-cost opposed-piston engine.

As a small company working very hard on our own product, we are probably not the best resource for general engine questions. Thank you for that useful article. Please answer the following questions. Is it possible to make higher rpm and less torque diesel engine by decreasing the stroke to bore ratio? Is that practicable? What the lower limit of stroke to bore ratio for diesel engine? Aghurri Indonesia. It is possible to decrease the stroke-to-bore ratio, and this will allow the engine to operate at higher RPM without generating excessive piston speed and friction, but to optimize efficiency you generally want a longer stroke-to-bore ratio.

Most diesel engines for light trucks and larger vehicles have a stroke-to-bore ratio above 1. We have not explored the lower limits because our focus is on optimizing efficiency. Dear sir, If I increase the stroke of a standard engine, in terms of power output, will the efficiency increase?

Is a high speed low torque engine preferred or a low speed high torque engine? With respect to efficiency and power generation. Vibin: The optimal set of design parameters depends on the application-specific requirements. Increasing the stroke of an engine results in some factors that increase efficiency like a decrease in the surface area-to-volume ratio of the combustion chamber and some factors that decrease efficiency like increased friction from higher piston speed, if the engine speed is kept the same.

So the right tradeoffs have to be balanced with the demands of the application, including power and torque requirements, package and weight constraints, cost considerations, transient operation, and drive shaft speed. Is it true that long stroke engines are much smoother than short stroke ones and that long stroke engines employ heavier flywheels to carry over dead centers effectively?

Do they develop max power and torque at low speeds? Hi Randy. I was trying to find out the other day what allows an F1 engine to rev so high and why ddo Ferraris in particular have such a high ptched waling sound that sso many people like? Also I would assume that the heads being pneumatic actuated rather than mechanical would have are a mojor factor. VERY quickly, so as to not take up your time, can you give me a quick understandable answer?

Thanks JC. So it makes sense that the most powerful engines also rev the highest. Because a piston with a short stroke doesn't have to travel as far each cycle, it can cover a greater distance in the same amount of time versus an engine with a longer stroke and smaller bore. That means more rpm. Similarly, a bigger bore means bigger valves, which means it can take in and push out more air in each cycle. And more air means more power.

It works in the opposite direction, too. Let's say your aim is efficiency rather than power. The mass of rotating parts and the use of turbocharging or supercharging can impact power output and efficiency.

Talking about an engine in isolation also only provides part of the picture. An engine's performance is ultimately determined by the car it's used in. The choice of transmission and the vehicle's weight and aerodynamics also affect efficiency. At the same time, a powerful engine is pointless if that power can't be put to the pavement.

For more depth, check out the video above. Like all EE videos, you'll certainly expand your knowledge of automotive engineering. Sign up to get the latest performance and luxury automotive news, delivered to your inbox daily! I agree to receive emails from Motor Authority. I understand that I can unsubscribe at any time. Privacy Policy.