V0lvo P yet again

[mldpt]

anybody know where i can get an exploded view of the 2003 engine, I want to know how it all works, I know the basics of the desiel engine but would like to understand how the fuel control is handled by the throttle. I asume the increase in throttle opening must increase the fuel to the injectors or does it somehow speed up the cam that the pumps work off. And how does the cold start mechanisim work. I hope somebody out there can help, somebody must know how they opperate, because somebody built them.
Mike. www.sailingforfun.co.uk
regards Mike.

 

[dickh]

Try this question on the Volvo Penta Users website - www.volpen.org.uk

dickh
I'd rather be sailing... /forums/images/icons/smile.gif

 

[jleaworthy]

You can get what you need from MMS. The whole lot of exploded drawings and part lists, in two languages you'll be glad to know, for the 2000 series engines will cost you about £30 but that is refunded with your first purchase of £100 or over (that doesn't buy much at Volvo prices). MMS seem to have risen from the dead (or were reports of their demise much exaggerated?) and are at www.mmsdirect.co.uk.

I've not found the Volvo Penta Users' web site a lot of use I'm afraid.

 

[Will_M]

MMS or who ever they are now are certainly no longer an authorised Volvo Penta dealer.

 

[frilaens]

Off the top of my head I can't remember what's in the workshop manual but you can download a scan of it (and others) at

http://motoren.ath.cx/

The server is slow so expect it to take a few minutes

Andy

 

[stubate]

as a general rule, inline pumps have a rack and pinion which when you open the throttle, move the pinion to increase the stroke of the individual piston pumps to each cylinder (they are actually individual pumps for each cylinder in the pump housing) the cold start works by opening the rack further so that more fuel is dispensed at the start. the governor is connected to the rack and is activated by weights sensitive to speed. the rack is actually at full speed position when you go to start and the governor activates immediately when you start turning and starting the engine. thats why it is so funny when you watch someone in a vehicule, which is reluctant to start, frantically pumping the accelerator. the rack is wide open until it starts and no movement of the accelerator will make a blind bit of difference.
on a rotary pump, there is what is called a swash plate which is a circular plate which turns around.
if you can imagine setting that plate at an angle as it turns and rests against little pumps, you would see that as you increase the angle that it would push the pumps more and more. so increasing the amount of fuel pumped per stroke.
this swash plate is connected to the governor and again the position of the governor is determined by speed and the position of the accelerator.
that is the basics but various manufacturers introduce may variables
there is a third way but i dont think that many yachts use them, cummins and detroit diesels use push rod operated injector cum pumps whereby low pressure diesel fuel is circulated around the "injectors" and a push rod actuated from a cam shaft actually pushes the piston in the injector to pump fuel directly into the cylinder. again racks are used to increase the stroke of the injector and are controlled by a governor
whoo!! thats enough for now
s