Fuel Injector Pump Driveshaft

..."Traditionally, the injection pump is driven indirectly from the crankshaft by gears, chains or a toothed belt (often the timing belt) that also drives the camshaft. It rotates at half crankshaft speed in a conventional four-stroke diesel engine. Its timing is such that the fuel is injected only very slightly before top dead centre of that cylinder's compression stroke. It is also common for the pump belt on gasoline engines to be driven directly from the camshaft. In some systems injection pressures can be as high as 200 MPa (30,000 PSI)."...

http://www.trucktrend.com/how-to/expert-advice/0904dp-diesel-injection-pumps/

https://en.wikipedia.org/wiki/Injection_pump

Modern fuel pumps are electric/electronic and not mechanical.

Here's information on those.

How Electronic Fuel Injection Works - Jalopnik

Try this.

Why? What's going on in your head that prompted this inquiry?

You seem to have gotten some good info already.

Anyway, welcome to CR4! Good luck!

Thanks for all of your responses, they have been extremely useful,

I am writing a report on the effects of sideload on a driveshaft in a fuel injector pump,

I have a basic understanding of what a drivehaft does in the pump but want to know in detail how the driveshaft is powered and where these loads come from (i am aware they have something to do with the belt it is attached to)

Any more information would be greatly appreciated

Thanks

I think that side-loads are caused by the cam followers. The more abruptly the follower must move up, the greater the side forces on the camshaft.

Of course, the trailing edge may have a different slope, so the opposite side force on the trailing edge of the cam may be different.

There may not be as much work performed on the trailing slope, so the spring preload may be the dominant force on the cam.

When cam shafts may turn at various speeds, the spring force must be enough to keep the follower in contact with the cam at the highest speed. Thus, at low speeds the spring force may greatly exceed the workload force. Whereas at the highest speed they may be comparable.