Motoare SOHC vs. motoare DOHC

[hitman]

Salutare!

 

Uite ce-am gasit.

Intrebarea mea este daca SOHC de la Cielo e fiabil. Oare cine l-a proiectat?

Sau ma rog daca aveti ceva in jurul acestui subiect.

 

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. V-type and/or flat will contain 2 camshafts. For a SOHC engine there are usually 2 valves per cylinder but there can be more with the addition of cams for each valve.

 

DOHC stands for Double Overhead Camshaft. Now there are 2 camshafts per header. So in an inline there are 2 camshafts because there is only one header, but there is 4 in a V-type or flat engine. These DOHC engines usually have 4 valves. One camshaft for the exhaust valves and the other for the intake valves.

 

Advantages to having a DOHC engine over a SOHC is that the engine has twice as many intake and exhaust valves as a SOHC motor. This makes the engine run cooler and more smoothly, quietly, and efficiently. But the downfall is that DOHC engines cost more for repairs. To ensure against expensive engine repairs, make sure you change your engine's timing belt about every 60,000 miles.

 

 

 

Additional Valves

 

There are some other valve combinations as well. Some engines, like the D15 in a Civic and the C30 in an Accord, have 4 valves per cylinder but are SOHC engines. This means there are four lobes on one camshaft per cylinder. With four lobes, or cams, per cylinder, they become smaller and wear easier which is a draw back to this setup. With one camshaft though, this will make the car lighter which creates better performance.

 

Another variation is 5 valves per cylinder developed mostly in newer Audi's. There are 3 cams on one camshaft and 2 on the other. The set with 2 cams runs 2 valves that are used for exhaust and the 3 on the other camshaft are used for the intake. Cars with 5 valves tend to be quieter and have better performance. Although if something goes wrong it can be costly to fix because parts are rare and expensive.

[hitman]

Salut Iso!

Multumesc pt. detalii!

Per ansamblu eshti multzumit cu Executivul pe LPG?

Eu vreau sa-mi iau un Cielo Stand. AC/LPG pt. nu cred ca merita diferentza de bani pina la Executiv. Cred in LPG ca o solutie de economie pt. aici in tzara. Nu mai spun ca shi pe afara au inceput sa livreze mashiniile din fabrica deja cu alimetare duala.