Learning Process on Diesel Injectors..... Slow
It has been almost 6 months since my last post on this project, but I have been working on-and-off on a diesel injector. After numerous attempts and failures I have accepted the fact that I will not be able to make 100% of the injector myself. Some of the componenets are beyond the capability of my equipment, but mainly, me. I have been spending some time on one of the antique diesel engine forums to learn about injectors. The Pump-Line-Nozzle system, like Find Hansen makes (my hat is off to that gentleman.... more like I am in awe) for his diesels is popular. But the thought is that the 2 stroke diesel really "needs" a unit injector, which is where the pump and nozzle are consolidated into a single piece. The Detroit Diesel (GM) 2-strokes all had unit injectors.
I attempted to use the Yanmar injector nozzle, and injector pump, to make a single piece unit injector. It almost worked and would occasionally throw out a beautiful mist, but it leaked too much and basically didn't work. If it had been built perfectly/accurately, it should have worked. But it was a learning process.
Here are pictures of the original Yanmar parts, the unit injector parts, the assembled unit injector, and a drawing of it. There are some differences between the injector and my drawing. The ijector is MUCH smaller than the original parts, but still maybe too big. The only parts that I used from the Yanmar (in this version) were the nozzle and needle. It was a fail, but wow, did I learn a lot.
I am now working with a Detroit Diesel Unit Injector (type HV6) to see what makes them tick. And I have a good diesel engine mentor in Australia who has a lot of experience and patience.
Lloyd
OEM Yanmar diesel injector and pump
The unit injector that I came up with. The Yanmar needle and tip are the only parts I didn't make.
The finished unit injector. Too bad it didn't work.
It has been almost 6 months since my last post on this project, but I have been working on-and-off on a diesel injector. After numerous attempts and failures I have accepted the fact that I will not be able to make 100% of the injector myself. Some of the componenets are beyond the capability of my equipment, but mainly, me. I have been spending some time on one of the antique diesel engine forums to learn about injectors. The Pump-Line-Nozzle system, like Find Hansen makes (my hat is off to that gentleman.... more like I am in awe) for his diesels is popular. But the thought is that the 2 stroke diesel really "needs" a unit injector, which is where the pump and nozzle are consolidated into a single piece. The Detroit Diesel (GM) 2-strokes all had unit injectors.
I attempted to use the Yanmar injector nozzle, and injector pump, to make a single piece unit injector. It almost worked and would occasionally throw out a beautiful mist, but it leaked too much and basically didn't work. If it had been built perfectly/accurately, it should have worked. But it was a learning process.
Here are pictures of the original Yanmar parts, the unit injector parts, the assembled unit injector, and a drawing of it. There are some differences between the injector and my drawing. The ijector is MUCH smaller than the original parts, but still maybe too big. The only parts that I used from the Yanmar (in this version) were the nozzle and needle. It was a fail, but wow, did I learn a lot.
I am now working with a Detroit Diesel Unit Injector (type HV6) to see what makes them tick. And I have a good diesel engine mentor in Australia who has a lot of experience and patience.
Lloyd
OEM Yanmar diesel injector and pump
The unit injector that I came up with. The Yanmar needle and tip are the only parts I didn't make.
The finished unit injector. Too bad it didn't work.
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