To ask a furthur question - what shapes the maximum injection stoke volume vs rpm at these pumps. As I understand it compensation for volumetric efficiency vs rpm needs to be taken account so that at low speed and at hig speed the maximum injection charge is lower than at mid range rpm due to rereduced volumetric efficeincy. Peter
-----Original Message----- From: John Robbins [mailto:[EMAIL PROTECTED] Sent: 17 January 2007 10:34 PM To: Mercedes Discussion List Subject: Re: [MBZ] Governer question On Wed, 17 Jan 2007, Jim Cathey wrote: >> If we are talking pre computer controlled Mercedes diesels, such as >> the 617 turbo diesel, you are totally wrong! The governor does not >> have any function between idle and full rpm. The only things that >> control engine speed are the load, and the position of the fuel rack. > > I disagree. It's possible to build diesel governors that have > throttle responses anywhere from gasser acceleration models to pure > tractor-like fixed RPM settings. No doubt, but the governor on the OM617 turbos have a min/max governor with torque control and boost compensation (ALDA). > The governor in the 200D Frankenheap is very tractor-like, it pretty > much accelerates all-out (ha!) to the rpm corresponding to the throttle > pedal position. Well, on a flat road there is always going to be a fuel rack position vs speed since the car speed and load are fairly well correlated to each other. That pedal position is different in park than it is in drive correct? Those vacuum controlled IPs are interesting... the literature I have doesn't talk much about them though. John '79 300SD _______________________________________ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
