What are the advatages and disadvantages of overhead camshaft?

1. What are the advantages of an overhead camshaft?
2. What is the disadvantage of overhead valve engine compared to overhead camshaft engine?
3. Which is better OHV or OHC engine?
4. What is the advantage of a double overhead cam?
5. Which is better DOHC or SOHC?
6. Is overhead cam better than pushrod?
7. What is the main advantage of an overhead cam arrangement compared to an overhead valve arrangement?
8. What is the difference between overhead cam and overhead valve?
9. Why pushrod engines are better?
10. Do overhead cam engines have lifters?
11. Do overhead cam engines have pushrods?
12. Which is better OHC or SOHC?
13. Is DOHC better than VTEC?
14. What does VTEC stand for?
15. What is the difference between 2 valve and 4 valve engine?

What are the advantages of an overhead camshaft?

It is shown that the principal advantage of overhead camshafts is the increased natural frequency of the valve train. The resulting improved dynamic characteristics of the valve-actuating mechanism make it possible to design camshaft profiles which expand the useful operating range of high-speed engines.

What is the disadvantage of overhead valve engine compared to overhead camshaft engine?

hard to design more than two valves per cylinder. camshaft maintenance is more difficult. more complex block design.

Which is better OHV or OHC engine?

The OHV is a more compact design but less efficient while the power output is higher as compared to an OHC. An OHC configuration does not have lifters and push rods to deal with and, therefore, the total mass of the valve train is less. This makes it more powerful than an OHV configuration.

What is the advantage of a double overhead cam?

The main benefit of dual overhead cams is that they allow an engine to have four valves per cylinder. Each camshaft operates two of the valves, one camshaft handles the intake valves, and one handles the exhaust valves. Having four valves per cylinder gives an engine several advantages.

Which is better DOHC or SOHC?

DOHC is better for performance because you will get more horsepower with it. SOHC is better for reliability. A SOHC engine contains much lesser parts, which will make it more reliable.

Is overhead cam better than pushrod?

It's no surprise that the DOHC engine revs higher than the pushrod V-8. The reason it can do so is its improved breathing ability, which is largely due to its huge valve-curtain area.

What is the main advantage of an overhead cam arrangement compared to an overhead valve arrangement?

Overhead camshafts have the advantage of increased natural frequencies of the valve train. It is possible to design camshaft profiles which expand the useful operating range of high-speed engines because of the improved dynamic characteristics of the valve-actuating mechanism.

What is the difference between overhead cam and overhead valve?

An overhead camshaft (OHC) engine is a piston engine where the camshaft is located in the cylinder head above the combustion chamber. This contrasts with earlier overhead valve engines (OHV), where the camshaft is located below the combustion chamber in the engine block.

Why pushrod engines are better?

It starts with low-end torque. Although pushrod engines typically don't boast sky-high redlines, they do produce oodles of low-end torque. That's because pushrod engines typically use two valves per cylinder, which improves air velocity. ... Higher air velocity leads to better combustion and, ultimately, more torque.

Do overhead cam engines have lifters?

It depends on the definition of the term 'lifter' but in general, yes they do. They are often called tappets, or cam buckets etc., but they serve the same role as a lifter.

Do overhead cam engines have pushrods?

The motion of the camshaft is transferred using pushrods and rocker arms to operate the valves at the top of the engine. An overhead camshaft (OHC) engine also has overhead valves; however, to avoid confusion, Overhead valve engines that use pushrods are often called "pushrod engines".

Which is better OHC or SOHC?

OHC configurations also allow for better optimization of cylinder head, intake and exhaust port design compared to OHV engines. ... An SOHC engine will usually be less complex than a DOHC engine albeit, usually, at the cost of slightly less power. Most modern SOHC and DOHC engines are usually multi-valve engines.

Is DOHC better than VTEC?

Just wondering what are the main differences between DOHC vtec and SOHC i-vtec. Essentially speaking the biggest difference is the number of camshafts the engines have. DOHC engines are designed to rev higher, have peakier power outputs and PERHAPS high horsepower application.

What does VTEC stand for?

The VTEC (Variable Valve Timing & Lift Electronic Control) system uses separate camshaft profiles for low and high-end performance, and the engine computer selects between profiles.

What is the difference between 2 valve and 4 valve engine?

Now, with a two-valve layout, the central area of the cylinder head doesn't have much space for a spark plug. But with the four valves setup, there is sufficient space to place the spark plug in dead centre of the cylinder head, allowing for better spark propagation and more efficient combustion.