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#1
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Introducing my timing light - injection timing- digital RIV method- bench test
The FSM procedure 07.1-108, Checking injection timing (begin of delivery) with digital tester (RIV method) has a diagram which shows a setup of 3 pieces of hardware for checking injection timing.
http://mercedes.thatchermathias.com/w123CD2/Program/Engine/617/07_1-108.pdf The 3 pieces of hardware are: 617 589 10 2100 RI- Transmitter 617 589 09 2100 RI- Adapter (for available digital tester) Bosch MOT 001.03 Digital tester I have built my own system which provides the same functions as the above. Just did a bench test and took a short video. On the left is a drill spinning a disc with a screw to simulate the tang behind the injection pump timing plug. Clamped in the vise is the pickup (RI-transmitter) The pickup is plugged into the RI- Adapter (The aluminum box) which outputs to an inductive timing light. The digital tester is just a conventional inductive timing light. CLICK TO PLAY VIDEO! The portable drill goes up to 1000 RPM. As you can see, tracking is spot on at all speeds! The strobe cutout you see is due to the drill not hard mounted relative to the pickup so the gap moved a bit as I operated the drill. I will be testing this in the car over the next few days and will shoot another video.
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85 300D turbo pristine w 157k when purchased 161K now 83 300 D turbo 297K runs great. SOLD! 83 240D 4 spd manual- parted out then junked |
#2
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Nice work! That is awesome . Should help with IP work.
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"Senior Luna, your sense of humor is still loco... but we love it, anyway." -rickymay ____ "Your sense of humor is still loco... " -MBeige ____ "Señor Luna, your sense of humor is quite järjetön" -Delibes 1982 300SD -- 211k, Texas car, tranny issues ____ 1979 240D 4-speed 234k -- turbo and tuned IP, third world taxi hot rod 2 Samuel 12:13: "David said to Nathan, “I have sinned against the Lord.” And Nathan said to David, “The Lord also has put away your sin; you shall not die." |
#3
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85 300D turbo pristine w 157k when purchased 161K now 83 300 D turbo 297K runs great. SOLD! 83 240D 4 spd manual- parted out then junked |
#4
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Very cool!
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#5
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Hmm
Following this experiment.
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ASE Master Mechanic asemastermechanic@juno.com Prototype R&D/testing: Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician. Noise Vibration and Harshness (NVH). Dynamometer. Heat exchanger durability. HV-A/C Climate Control. Vehicle build. Fleet Durability Technical Quality Auditor. Automotive Technical Writer 1985 300SD 1983 300D 1984 190D 2003 Volvo V70 2002 Honda Civic https://www.boldegoist.com/ |
#6
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How much did the transmitter and adapter cost? Where did you source them?
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#7
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That's cool! As a variation on the idea, I'd like to see a test injector rigged up and the timing light pointed at the spray to see the degree difference between the timing signal and the actual injection event.
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-Evan Benz Fleet: 1968 UNIMOG 404.114 1998 E300 2008 E63 Non-Benz Fleet: 1992 Aerostar 1993 MR2 2000 F250 |
#8
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Impressive! Outstanding results so far.
This is an excellent idea!
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1983 123.133 California - GreaseCar Veg System |
#9
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I made them myself.
__________________
85 300D turbo pristine w 157k when purchased 161K now 83 300 D turbo 297K runs great. SOLD! 83 240D 4 spd manual- parted out then junked |
#10
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Quote:
We are jumping the gun here. Although I am confident what I built will work on the engine, I have not actually installed it on the engine yet.
__________________
85 300D turbo pristine w 157k when purchased 161K now 83 300 D turbo 297K runs great. SOLD! 83 240D 4 spd manual- parted out then junked |
#11
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Understand that you are still in development. I'm just brainstorming possible applications.
I envision a spare injection hard line, re-bent to run to an injector aimed into a large glass jar. You could connect this to the # one delivery valve and just run the engine at idle on 3/4, 4/5 or 5/6 cylinders. My timing light has an advance adjustment dial so I also imagine that while the engine was running with your trigger mechanism attached, you could adjust the advance dial and shoot the injector spray until you could see the very beginning of the injection event. This exercise would tell you the exact offset between the position of the trigger lug in the pump and the actual injection event and would take into account all of the variables - actual port closure, hard line flex, pop pressure, etc... Then, you could shoot the crank indicator with the freshly calibrated timing light and adjust the pump until the desired indication is reached.
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-Evan Benz Fleet: 1968 UNIMOG 404.114 1998 E300 2008 E63 Non-Benz Fleet: 1992 Aerostar 1993 MR2 2000 F250 |
#12
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Good work. How do you trigger the timing light - with a low voltage signal or with a high voltage? For the later, one could use a GM HEI module to drive a coil, and clamp over the HV spark lead as the timing light is normally used. A VR type crank sensor can trigger an HEI module. A round-about way, but with all off-the-shelf parts (have in my garage).
Reading between the lines of the M-B instructions, it appears their processing box times the delay between the TDC pulse and the RI pulse, and converts to crank angles. It seems you could just flash the timing light at the crank marks to verify it flashes at 15 deg ATDC. It appears that the RI pulse does not align with "start of delivery". Perhaps it marks TDC of the #1 IP piston. |
#13
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I borrowed a Ford timing light setup for my 85 F-250 with International 6.9 L diesel with a Bosch injection system. It used some kind of inductive clamp on the fuel line to operate the light. Anyone tried it on a Benz?
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#14
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Yeah, I have one made by Ferret but the clamp is too big for the line - the 606 has, I believe, 4.5mm lines and the clamp is designed for 6.25mm or some such. I put a collar around the line to try and make it work but the results are not encouraging.
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-Evan Benz Fleet: 1968 UNIMOG 404.114 1998 E300 2008 E63 Non-Benz Fleet: 1992 Aerostar 1993 MR2 2000 F250 |
#15
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Quote:
Bad news: I suffered a setback today. While installing the sensor into the IP timing plug, I damaged the wiring inside the sensor. It is not salvageable and is now junk since it is potted in epoxy. I have to come up with a better sensor design. What worked so well on the bench is no longer working on the bench. Damn, a lot of work went into that sensor! I have more parts on order which should arrive in a few weeks.
__________________
85 300D turbo pristine w 157k when purchased 161K now 83 300 D turbo 297K runs great. SOLD! 83 240D 4 spd manual- parted out then junked |
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