OHV What does it stand for?

Question

May have something to do with off road rec.

Answer 1

In regards to off road recreation OHV stands for Off-Highway Vehicle

In regards to internal combustion engines OHV stands for Over Head Valve

Answer 2

OHV = Overhead valve as opposed to side valve. The difference between OHV & OHC or DOHC (overhead cam/dual overhead cam) is that the camshaft that operates the valves is not over the valves but is down in the block and is usually chain driven from the crank. There are push rods that the lobes on the camshaft push & the rocker gear set in the cylinder head operate the valves. (Springs cause the valves to close & the rods to move back down) These engines are not quite so common in cars as they were but they are very popular in all other areas engines are used, especially utility usage such as pumps. (Also, a lot of V8 engines even in performance cars are still OHV) In OHC/DOHC the camshaft(s) is/are in the cylinder head. These engines are more popular in performance cars. For a pump/utility engine remember that these engines are a little harder and expensive to open up & put back together that OHV engines due to having to reset the cam timing each time the cylinder head(s) are removed & refitted. In side valve engines the valves are in the engine block instead of the cylinder head. Thesse are more old fashioned & quite rare now. There are other arrangements such as sleeve valves, but I'll leave them out of this answer. By the way, no 4 stroke engine has one valve per engine. there has to be at least one inlet & one exhaust valve per cylinder. The most common arrangement for OHV is 2 valves per cylinder. For OHC it is the same story although 3 valves is also quite common in this case. For DOHC there are typically 4 valves per cylinder and in some cases 5 (yes, odd numbers do exist). For a pump I would go for a OHV model for ease of use, reliability, maintenance and running costs. I hope that clears things up for you.

Answer 3

OK kiddies, let's review the askers actual question;

"OHV What does it stand for?
May have something to do with off road rec. "

Since there was absolutely no mention of engines of any nature, but the asker plainly states that it "May have something to do with off road rec. ",
then the correct answer is:

Off Highway Vehicle.

To all the smart a$$es that made snide remarks AND answered over head valve, ever heard of SFB?

Answer 4

There are various types of valve arrangement/ location to date, here is an explination of the most common ones:
OHV means OverHead Valve - an engine design where the camshaft is installed inside the engine block and valves are operated through lifters, pushrods and rocker arms (an OHV engine also known as "Pushrod" engine). Although an OHV design is a bit outdated, it has been successfully used for decades. An OHV engine is very simple, has more compact size and proven to be durable.
Downsides: it's difficult to precisely control the valve timing at high rpm due to higher inertia caused by larger amount of valve train components (lifter-pushrod-rocker arm). Also it's very difficult to install more than 2 valves per cylinder or implement some latest technologies such as Variable Valve Timing - something that could be easily done in a DOHC engine.
OHC in general means OverHead Cam while SOHC means Single OverHead Cam.
In the SOHC engine the camshaft is installed in the cylinder head and valves are operated either by the rocker arms or directly through the lifters.
The advantage is that valves are operated almost directly by the camshaft - easy to achieve the perfect timing at high rpm. Also it's possible to install three or four valves per cylinder
The disadvantage - an OHC engine requires a timing belt or chain with related components - more complex and more expensive design.
DOHC or Double OverHead Cam - the setup used in many today's cars. Since it's possible to install multiple valves per cylinder and place intake valves on the opposite side from exhaust vales, DOHC engine can "breath" better meaning that it can produce more horsepowers with smaller engine volume. Compare: The 3.5-liter V6 DOHC engine of 2003 Nissan Pathfinder has 240 h.p, similar to 245 h.p of the 5.9-liter V8 OHV engine of 2003 Dodge Durango.
Pros: High efficiency, possible to install multiple valves per cylinder and adopt variable timing.
Cons: More complex and more expensive design.

Answer 5

OHV atnds for Overhead valves. Baically there are a couple of different ways to open the valves for a combustian engine. One is with Pushrods from below, and the other is with a camshaft and gears or lobes from the top. This is called overhead valves

Answer 6

Over Head Valve.

Answer 7

Over Head Valve, its the way that certain motors built with the valves over the cylinder.

Answer 8

Over Head Valve, as opposed to a flathead.

Answer 9

Over head valve, it's the type of engine

Answer 10

I think it means "Over Head Valve" which means the camshaft is located under the head.