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engine - what is difference between DOHC and SOHC? - …

SOHC is single overhead camshaft, DOHC is for double overhead camshaft. DOHC was introduced to improve the volumetric efficiency of a given engine, lending itself to more power. DOHC more lately is used over SHOC as a first choice because of the ease of using variable valve timing which leads to greater control of emissions.For those who don't know, SOHC and DOHC refer to the following: SOHC - Single Over Head Cam DOHC - Double Over Head Cam A cam refers to a "cam shaft" or the thing which goes bump in the night. The cam has a "bump" or "hump" in it which actuates the valves which allows air into and exhaust out of the cylinder of the engine at the correct time so the engine will run correctly. As for the configurations themselves, in SOHC configurations, the camshaft is placed on top of the head. Here is an example: The wheel at the right of the picture is what the cam belt rides on. This wheel is attached to the cam itself. The cam, then actuates the rocker arms which you can see are pointing to either side of the head. This is an example of a 3-valve per cylinder head (2-intake and 1-exhaust per cylinder). The 2-valve per cylinder is a much mor prevalent configuration. Here is an example of a DOHC: In this example, you can see there are two separate cam shafts riding atop the head. For DOHC heads, the cams can be tied together with a short chain, then have a separate chain/belt which drives the cams, or can have just a single chain/belt which runs the whole thing. DOHC engines usually have a configuration of 2-intake and 2-exhaust valves per cylinder, but in some cases like the configuration Volkswagen-Audi Group (VAG) uses a five valve per cylinder (3-intake and 2 exhaust). In most cases, the cam directly actuates the valve without the use of a rocker arm (it may or may not have a "lifter" between the cam and the valve). The whole purpose of having OHC configurations is to do away with another form of valve actuation, that of pushrods found in the Over Head Valve (OHV), which is found in most American V8 configurations (Ford uses an OHC version for their motors). OHV configurations use a centrally located cam shaft (central to the engine block), and actuates the valves through the use of lifters, pushrods, and rocker arms. The OHC configuration does away with most of this for the reduction of mass in the valve train. This reduction of mass usually means the engine can run safer and cleaner at higher engine speeds due to less inertial pressures on the valve train. Also, since this is more of a direct actuation of the valves, there is less flex (due to push rods) and a more accurate valve actuation occurs. The trade off in this is that the belts/chains/guides which controls all of this usually wear out over a period of time well before the engine's end of life (EOL), where as on an OHV engine, the valve train and timing chain usually will last until the engine is worn out. The OHC configuration is a lot more complex than the OHV in that there are a more parts which can go bad, which can cause catastrophic consequences if it fails. OHC engines are usually "interference motors", which means the valves and the pistons occupy the same space at different times. If the cam belt/chain fails, the valves stop moving, but the pistons do not (right away). The piston will move up into the valves and usually destroy the valves and the entire head assembly. It is imperative that the cam belt/chain maintenance get done on time. There are no warning signs (without taking the engine apart) to tell you when it is worn out, so following the manufacturers replacement interval is very important. As discussed, the DOHC engines usually have more valves per cylinder than the SOHC versions. They will also usually have less parts involved (most DOHC directly actuate the valves, where SOHC usually have rocker arms). More valves means the engine can intake and exhaust more gasses from the engine. Think of a large circle, say one which is 4" across (or say 10cm for you unruly metric folks out there). How many 2" (5cm) circles can you fit within it? The answer is two. Now take the same 4" circle and fit 1.5" circles within it. The number is somewhere around four. A 4" circle has the area of 12.57in/sq. A 2" circle has the area of 3.14 in/sq, and therefor two of those would equate to 6.28 in/sq. With the 1.5" circle, your total would be 7.07 in/sq. (Note: While I'm not sure if four could fit in the circle exactly, the example is valid for educational purposes.) Now imagine these circles are the valves in the cylinder head. The more valves you can fit into the head, the greater the surface area you can cover. The greater surface area allows greater air/exhaust flow into and out of the cylinder. This gives the engine a chance at better volumetric efficiency or VE (basically how well the cylinder fills with the air/fuel mixture). This allows for greater performance from the engine. Manufactures might choose SOHC over DOHC engines due to cost in design and manufacture. They might choose DOHC over SOHC for the performance aspect. I'm sure there are other reasons. What should you do? This site isn't really for giving you my opinion about what you should choose. Basically I would tell you to find vehicles which are within your cost and performance goals. Select several versions of each, test drive them, then make up your own mind. Both OHC versions have a maintenance schedule which should be met with impunity. Other than that, have fun!Best answer · 32Here are some working animations of the different types of engines. OHV SOHC DOHC29SOHC is single overhead camshaft, DOHC is for double overhead camshaft. DOHC was introduced to improve the volumetric efficiency of a given engine, lending itself to more power. DOHC more lately is used over SHOC as a first choice because of the ease of using variable valve timing which leads to greater control of emissions.3SOHC, or Single OverHead Cam, means that you only have one camshaft working both the intake and exhaust valves. DOHC, or Double OverHead Cam, means you have two separate camshafts, one for intake valves and one for exhaust valves. Additionally, SOHC engines only have 2 valves per cylinder, one intake and one exhaust. DOHC have 4 valves, two intake and two exhaust. This means that you can do more fine-tuning of the engine because you have more control over how much and when air enters and exits the engine. As to which engine to go for: SOHC engines are MUCH cheaper and easier to maintain, but they don't have quite the performance or fuel-efficiency that the DOHC does. So a DOHC is "better", but SOHC is cheaper. FYI: when you hear of a car with "quad cams", it means it's a V6 or V8 (or 10, 12, etc) with two rows of cylinder banks, each with DOHC.3Why does GM still insist on push rod engines? - Motor ...Jun 10, 2018what is difference between DOHC and SOHC? See more results

Which engine is better? SOHC vs DOHC - Team-BHP

team-bhp› Team-BHP› Under the Hood› Technical StuffMar 11, 2010· The dohc design gives more precise control of these valves while the sohc is with more number of linkages. Its similar to the difference between a direct linked gear lever and one thats connected to the gear box through many linkages.

Overhead camshaft - Wikipedia

Summary

SOHC vs DOHC comparison - Why High End

DOHC easily incorporates variable valve timing to further increase performance but it is not impossible on an sohc engines as Honda is well known to have their variable valve timing V-TEC on sohc engines, for example the 2006 Honda Legend /Acura RL. So if you're still wondering about sohc vs dohc they both have their advantages but I would lean towards the dohc.

SOHC vs. DOHC - Which Engine is better? - CAR FROM JAPAN.

Jun 11, 2018· As discussed a DOHC has a double setup of valves per head. This, in turn, implies that more power would be consumed owing to the enhanced control over the valves. And, more the power more is fuel consumption. Thus, when talking in the terms of SOHC vs. DOHC fuel efficiency, a SOHC is more fuel efficient. But, it should be known that it is the skills of a driver and the design of the engine …User rating: 3.5/5

OHC vs SOHC vs DOHC Technologies: What Is The …

Know More About Engine Terminology - OHC, SOHC, DOHC: Conventional Valve Operating Mechanism: Before OHC: In older generation conventional engines, the engine camshaft was located in the cylinder block next to the engine’s crankshaft.The engine’s valves were located in the cylinder head at the top.

OHV, OHC, SOHC and DOHC (twin cam) engine - …

samarins› For Car Owners› Car TermsOHC means OverHead Cam in general, while SOHC means Single OverHead Cam or Single Cam. In a SOHC engine the camshaft is installed in the cylinder head and valves are operated either by the rocker arms or directly through the lifters (as in this animation).

SOHC Engines Vs. DOHC Engines - Angelfire

SOHC Engines Vs. DOHC Engines Difference SOHC stands for Single Overhead Camshaft. That means that there is only one camshaft per header. Inline engines will contain one camshaft.

SOHC vs DOHC vs Pushrod Engines: Camshaft Issues

SOHC vs DOHC vs Pushrod Engines: Camshaft Issues. by André Roy (regarding the advantages of DOHC vs SOHC, or dual-overhead-cam vs single-overhead-cam engines): DOHC has a major marketing advantage. With a valve train (camshaft, lifters, pushrods (if present) rockers, valves and springs) there is an advantage to light weight.

The Difference Between OHV, SOHC, and DOHC - Olathe …

DOHC allows more efficiency and better control over the intake/exhaust process since each camshaft can be tuned separately from its mate. DOHC engines are more complex than SOHC, but are very efficient and are thus gaining popularity in automotive design geared towards better economy and lower exhaust emissions.

VTEC - Wikipedia

Honda i-VTEC (intelligent-VTEC) is a system that combines VTEC with Honda's VTC (Variable Timing Control), a continuously variable camshaft phasing system used on the intake camshaft of DOHC …Context and description·

What is the difference between engine with Sohc or dohc ...

SOHC engines are cheaper and less complicated to design, build and maintain because of the lesser moving parts, while DOHC are more complex to design build and repair because of the extra moving parts.. Another advantage of having a DOHC engine over a SOHC is that the engine has twice as many intake and exhaust valves as a SOHC motor.

SOHC vs DOHC Valvetrains: A Comparison - Paul Tan's ...

SOHC vs DOHC Valvetrains: A Comparison In Cars , Howtos / By Paul Tan / 22 June 2005 5:39 pm / 62 comments So I decided to post this entry so that people will be better informed on what SOHC or ...

What is the difference in a car between a SOHC and a DOHC ...

answers› …› Comparisons› The Difference BetweenSOHC stands for Single Overhead Camshaft and DOHC is Double Overhead Camshaft looking at the top of the motor it will have the corresponding abbreviation of what type you have.

what is difference between DOHC and SOHC? - Stack …

SOHC, or Single OverHead Cam, means that you only have one camshaft working both the intake and exhaust valves. DOHC, or Double OverHead Cam, means you have two separate camshafts, one for intake valves and one for exhaust valves.

SOHC vs DOHC: Differences Explained - tvsmotor

SOHC is a Single Overhead Camshaft and DOHC is Dual Overhead Camshaft. A Camshaft is a rotating cylindrical rod inside an internal combustion engine with oblong lobes protruding from it. Both are directly connected to your bike’s torque and horsepower.

DOHC vs SOHC engines - all you need to know! - PakWheels Blog

However, an SOHC layout, when tuned, can be as efficient as a DOHC, but under proper tuning, DOHC engines always achieve more power than SOHC engines. Conclusion: So to sum it all up, SOHC has better low-end power, DOHC has better high-end power and overall maximum power.

The Difference Between OHV, SOHC, and DOHC - Olathe …

DOHC allows more efficiency and better control over the intake/exhaust process since each camshaft can be tuned separately from its mate. DOHC engines are more complex than SOHC, but are very efficient and are thus gaining popularity in automotive design geared towards better economy and lower exhaust emissions.

Mengenal Mesin DOHC Dan SOHC, Apa Kelebihan Dan ...

Kita beli sport apa bebek bro,sohc bebek wajar.tapi sport yg identik dg kecepatan pasti dohc.liat anak muda yg suka kecepatan pasti pilih mesin dohc.balap drag juga dohc yg sering dipakai contoh fu atau cb.kalau sohc cocoknya buat jalan2 muter2 perumahan,pigson,versa contohnya.

SOHC Vs DOHC Motorcycle Engines » BikesMedia.in

SOHC stands for Single Over Head Camshaft and DOHC stands for Dual Over Head Camshaft. Every engine is designed according for a specific purpose. A valve train should be light so that it does not possess a lot of rotational inertia.

OHV, OHC, SOHC and DOHC (twin cam) engine - …

samarins› For Car Owners› Car TermsOHC means OverHead Cam in general, while SOHC means Single OverHead Cam or Single Cam. In a SOHC engine the camshaft is installed in the cylinder head and valves are operated either by the rocker arms or directly through the lifters (as in this animation).

Overhead camshaft - Wikipedia

A dual overhead camshaft (DOHC) valvetrain layout is characterised by two camshafts located within the cylinder head, one operating the intake valves and the other one operating the exhaust valves. This design reduces valvetrain inertia more than is the case with an SOHC engine, since the rocker arms are reduced in size or eliminated.

SOHC VS DOHC - CB750

Jan 12, 2013· sohc vs dohc CB750 is dedicated to the Honda CB750 SOHC and DOHC motorcycles and to their owners who love to ride, restore, and customize them. As a guest you can view the forum and photo galleries, but you have to register before you can post or view attachments.

DOHC vs. SOHC | Mustang Forums at StangNet

Apr 23, 2004· The biggest advantage is that DOHC breathes better by way of having not only 1 intake & exhaust 1 valve, but 2 intake & exahust 2 valves. More air in & more air out means more power & more power potential given the same displacement.

Sohc To Dohc Swap | V6 Mustang Forums

v6mustang› General Mustang Discussion› Mustang TalkMay 05, 2004· the 3.8 liter v6 has sohc? forgive the question, i am using my buddys account because we are both working on his mustang. if it is so, then a dohc …
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