Table of Contents
- 1 What is the benefit of the double overhead camshaft?
- 2 What are the advantages of camshaft?
- 3 What is the advantage of an overhead cam engine versus an overhead valve engine?
- 4 What does VTEC stand for?
- 5 What is the difference between 2 valve and 4 valve engine?
- 6 What is the advantage of a double overhead cam engine versus a single overhead cam engine quizlet?
What is the benefit of the double overhead camshaft?
A DOHC, four valves per cylinder configuration allows better airflow at high engine speeds, resulting in better top end power. DOHC engines also allow the spark plug to be placed right in the middle of the combustion chamber which in turn promotes efficient combustion.
What are the advantages of 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 difference between single and double overhead cam?
Starts here4:53SOHC vs DOHC | Autotechlabs – YouTubeYouTubeStart of suggested clipEnd of suggested clip58 second suggested clipLet’s have a look at the sohc configuration an sohc engine head is packed with intake. And exhaustMoreLet’s have a look at the sohc configuration an sohc engine head is packed with intake. And exhaust valves rocker arms rocker arm shafts.
Why is a DOHC better than SOHC?
DOHC engines have two camshafts one which controls the intake valves while the other is responsible for the exhaust valves. SOHC engines are fuel-efficient, but DOHC can reflect more fuel efficiency depending on the design of the engine and the skills of the driver.
What is the advantage of an overhead cam engine versus an overhead valve 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 does VTEC stand for?
Variable Valve Timing & Lift Electronic Control
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 are the advantages and disadvantages of CAM?
Computer aided manufacture (CAM)
| Advantages of CAM | Disadvantages of CAM |
|---|---|
| Fast and accurate production | Expensive to set up |
| Machines can run constantly on repetitive tasks | Needs a skilled workforce of engineers |
Is overhead cam better?
Pro: More breathing room means more horsepower and more high-end torque (though pushrod engines still have better low-end torque). Pro: Variable valve timing can easily improve power and fuel efficiency. Pro: DOHCs can hit way higher redlines than OHV engines due to a higher rev ceiling.
What is the difference between 2 valve and 4 valve engine?
4 valves per cylinder allows for more airflow than 2 valves per cylinder, as there is larger open area when the valves are open. Having a configuration with DOHC and four valves per cylinder means better airflow, especially at high engine speeds, resulting in better top end power.
What is the advantage of a double overhead cam engine versus a single overhead cam engine quizlet?
A DOHC design permits a wider angle between intake and exhaust valves than in SOHC engines, which improves the air-fuel mixture’s flow through the engine. A further benefit is that the spark plug can be placed at the optimum location, which in turn improves combustion efficiency.