How Helix Fuel Pumps Work! (Jerk Piston Variable Injection Pump)
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- เผยแพร่เมื่อ 7 พ.ค. 2024
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Learn how a jerk helix fuel pump works! It’s a variable injection jerk type pump that is used to supply fuel to an internal combustion engine (typically marine engines). The pump has a simple but effective method for controlling when fuel is injected and the volume of fuel injected.
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Excellent explanation; and all without background music. I wish certain other TH-camrs would follow your example!
I personally hate background music 😀 It's a personal thing though, some people love it. Guess it's like Marmite.
@@savree-3d Ah, Marmite. I used to work for Unilever ages ago but never had the pleasure of running into Marmite. Added to my Bucket List if I can find it in South Carolina :-)
Solid animation and explanation.There's some other good ones, but this is the best I've come across so far.
Good animation. This style (non VIT) has fixed timing for the beginning of injection and only varies the end of injection. The VIT version of these pumps is controlled by a second rack & pinion that moves the barrel up and down, and therefore the height of the spill port, with respect to the helix. Another important feature not shown here is the puncture valve.
7:17 - As a fairly newly licensed diesel mechanic who has, by nature, not had the pleasure of dealing with mechanical fuel systems simply because they are no longer around. That being said, my curious mind has always been baffled by the true impact of rack manipulation in terms of effective plunger stroke vs helix position. 10 out of 10. Clear, descriptive and intelligent.
If you can buy a mercedes OM606 diesel engine, they use a mech fuel pump and are popular to modify. expensive but i think it would be very interesting for you.
Great explanation
Thank you for make me understand this complicated mechanism through eassy explanation 🙏
Superb model and outstanding narrative, thanks!
Thank you.
Thank you for the video... really great stuff !!
Awesome explanation with very nice animation, Thank you for sharing this video, I have learned better from previous
I love it . We need more videos like this with machinery and mechanisms aimed to marine engineers . I subscribe immediately. Thanks
Clear presentation and explained ❤👍🏻
Thank you 🙂
Need more topics related to Maine technology...this is very helpful
I usually don't comment on TH-cam videos. But now I can't help it, I must have to come here in the comment section and thank you! Great model and narrative Sir! Loved your pedagogy!
I appreciate that!
Commenting actually helps these guys out a lot more than clicking the like button, so if it's something you enjoyed, throw these guys a bone. Take in mind that if it's something you don't like, commenting, even if you're telling them they suck, still helps them out with the algorithm.
That was such a good explanation
Excellent animation along with precise explanation
Damn sir this is the best video i have ever seen about this mechanism ❤️🔥
Sir thank you so much it's very clear explained about individual fip system controlled fuel by governor fuel rack
GOOD ANIMATION
Please make videos on types of fuel injection system
Clever design and excelent explanation 🫡
Wow thank your for this video. Very clear explanation.
Nice video animation and explanation,thanks for sharing,hope we see more marine videos..
Very good and descriptive. Thank you.
Wow thanks for this! Working on a tractor that i think work on the same priciple and havent figured out how the pumps works on it =) now its all alot clearer =)
You're welcome!
Fascinating stuff.
Earned a subscribe. Beautiful explanation. I teach engines at the undergraduate level and this video was a more peaceful watch than watching a panda chew through a bamboo stick.
Awesome, thank you!
Excellent explanation, thanks
Thank you so much 🙏🙏
very understandable video.... thank u. please lay out another for Fuel injection valve of marine 2-stroke MAN B&W MC engine.
An eye opener and Nicely explained, thank u.just wanted to know what controls the rack and teeth arrangement and which control of the engine regulates this movement
I loved your work, Thank you so much! Can you make one for the governor? TIA.
도움이 많이 되네요~
very helpfull🤙👍❤
Amazing video. Can you explain the difference between fuel pump of main engine and auxillary engine. Thanks
Very very good explanation
the best video and explanation so far
Thank you
Excellent work
Thank you! Cheers!
thank you sooo much
Very fascinating. Clearly understood. Can that be set to specific position? I have two piston engine generator that uses two of this pumps is currently troubling me with fuel economy and low power. There appears to be incomplete combustion. Could that be problem with fuel pump? Kindly assist with advise.
thankyou
Super video. Thanks 👍
Thank you
Very understandable video thanx a lot.i have a question.where does the fuel go from the split outlet?
This is amazing❤️❤️❤️😍😍😍🙊thank you very much for what you are doing for maritime industry😍🙊❤️❤
No problem. Happy to help.
very useful and easy to understand for new engineer!thanks
You are welcome!
This is good but explain the operation of the All parts please
If Iunderstan correctly the quadrant will only be able to rotate less than 180° before fuel leakages begins from minimum injection volime to maximum injection volume. We never see the back of the helix to confirm full construction.
Splendid animation.
You might include fuel color to indicate pump pressure changes from low at fill, high during injection volumes, then revert back to low when leakage begins.
Explanation is very nice 🎉🎉
Which software you use for creating beautiful and working models
I request you please tell me 🙏
Great explanation! However, could have included the shut-off position.
Hi. Is the plunger intial position set manually or it is done by the governor?
Best visualisation!!
I have a question about slow speed two stroke starting air system: what controls the timing for when starting air stops being admitted and fuel starts being injected when starting main engine?
Would be awesome if you could make a video on air compressors, reefer compressors, cascade tank and condenser, cylinder heads and sewage treatment plant.
Thank you from an Engine Cadet!
Will put it on the list! Thanks for the suggestion and for watching.
I could not find the exact answer actually. But this is what i think is most probable. The order of entry of starting air via starting air valve is controlled by the air distributor, which in turn follows a dedicated camshaft ( or sometimes just driven) for controlling air distributor only. This dedicated camshaft is again connected to the main camshaft which in itself executes a firing order i.e. sequence of firing of the engine units. Now I am assuming when the crankshaft attains enough rpm the pneumatic signal (low pressure air starting signal) which allows the bottle air to pass onto pilot valve and main air starting valve ( via automatic valve)is blocked just before the air control valve, ceasing the whole system operation. Now how this air signal is stopped I am not sure of....maybe it is controlled by a master and slave electronic controller which takes feedback from the rpm meter.
We are manufacturer specialized in auto and marine diesel engine parts since 1952.
Our main parts are
EURO II system: plunger, nozzle , delivery valves, head rotors, repair kits, etc.
Common rail system: Injector complete and injector spare parts for CATERPILLAR, DENSO, DELPHI , BOSCH, SIMENS, CUMMINS, etc.
If you have any inquiries, pls do not hesitate to contact me.
This was really very hard to understand. Thanks for helping
Thankyou somuch ❤️❤️❤️❤️❤️❤️❤️
Most welcome 😊
I wish u could have been my lecturer 😕🥺.. Nicely explained 😘
Hi Savree. Very well explained and easy to follow, great video. Just one question on this type of pump, what would cause the engine to maintain full revvs when the accelerator has returned to the idle position? Can you advise what components I could check? Seems like a component is sticking in the open position? Thanks in advance.
Did you ever get an answer for that issue because I’m having the same problem with my tractor stuck at full throttle?
stuck rack and or p/b @@noeramos6157
How do you set the marks between the rack and the plungers
If we adjust vertical groove of the plunger just infront of the spill port.The fuel injection will totally stop
Good day sir..if the injection pump..perform low pressure..is it possible that the plunger is the problem sir?..
Please explain function of deflector on fuel pump
good
What happens if the orientation of the the plunger is 180 deg out in relation to the sleeve?
Please create a VE Rotary fuel pump animation
I have read somewhere that the Vertical groove needs to have more length than the piston stroke. Why this happen?
How suction valve works?? Why there is suction valve and not in the generator fuel pump
Does the governor controls the rack? Anyway, superb video. Subscribed.
We are manufacturer specialized in auto and marine diesel engine parts since 1952.
Our main parts are
EURO II system: plunger, nozzle , delivery valves, head rotors, repair kits, etc.
Common rail system: Injector complete and injector spare parts for CATERPILLAR, DENSO, DELPHI , BOSCH, SIMENS, CUMMINS, etc.
If you have any inquiries, pls do not hesitate to contact me.
Yes
marine engineering 😍😍😍😍😍
So...am I correct in thinking that the reciprocation of the plunger is caused by something not shown? Is the thing causing the reciprocation also controlling the timing? Since the amount of fuel pumped per cycle is controlled by the position of the quadrant and rack (and hence the helix), am I also correct in thinking that the length of stroke of the piston is constant?
Stroke is constant. The pump is operated by the camshaft.
We are manufacturer specialized in auto and marine diesel engine parts since 1952.
Our main parts are
EURO II system: plunger, nozzle , delivery valves, head rotors, repair kits, etc.
Common rail system: Injector complete and injector spare parts for CATERPILLAR, DENSO, DELPHI , BOSCH, SIMENS, CUMMINS, etc.
If you have any inquiries, pls do not hesitate to contact me.
Is the tilt degree of plunger affects the oil distribution?
May i have your email? For consultation purpose 🙏
After i change all helix fuel pump. Engine not stop until i close fuel line.. how i can fixed
Where does fuel from spill port goes?
What gave rise to this style of pump? Why is it used over more conventional fuel pump designs? How does it rank on efficiency?
It's basically a piston pump with the main difference being the helix. I would need to check concerning efficiency. Its a genius design, that much I know! 😀
We are manufacturer specialized in auto and marine diesel engine parts since 1952.
Our main parts are
EURO II system: plunger, nozzle , delivery valves, head rotors, repair kits, etc.
Common rail system: Injector complete and injector spare parts for CATERPILLAR, DENSO, DELPHI , BOSCH, SIMENS, CUMMINS, etc.
If you have any inquiries, pls do not hesitate to contact me.
Some tractors work with this sort of pump as well.
9:03 Isn't it more convenient to have them together since it's easier to have only one rack commading all pumps?
We are manufacturer specialized in auto and marine diesel engine parts since 1952.
Our main parts are
EURO II system: plunger, nozzle , delivery valves, head rotors, repair kits, etc.
Common rail system: Injector complete and injector spare parts for CATERPILLAR, DENSO, DELPHI , BOSCH, SIMENS, CUMMINS, etc.
If you have any inquiries, pls do not hesitate to contact me.
How does the timing of this pump is adjusted?
It's not. In that particular example only amonut of fuel being injected can be adjusted. There are other types of jerk piston with second helix on upper edge which allows for adjusting timing but in very restricted limits only.
What causes the plunger to move up and increase the pressure of fuel?
The Cam is provided below the plunger.when the cam in profile the plunger pushes up..
When the plunger is down both inlet and outlet port is uncovered and why there is no injection when the plunger is down and both ports are uncovered
what about the vacuum that occurs. it will lock piston
So this is the basic pump invented by Bosch for diesel fuel injection? Licensed to other companies like Zexel, Diesel Kiki and Yanmar?
Amazing visualisation! What I'm missing is understanding where the lifting force comes from, where the movement of the rack is controlled (does the engine adjust the rack depending on how much fuel it needs?), And what happens to the fuel that spills out - does it drain away or is there a tank? Presumably it doesn't go to waste :)
Allow me to answer. The lifting force comes from a cam and follower arrangement. The follower pushes the plunger up and down as it is controlled by the cam on the camshaft, the camshaft in turn is controlled by the engine crankshaft. The camshaft thus controls the firing order i.e the timing of the fuel injection. Now the rack movement (which controls the quantity of fuel to be delivered ) is connected to the governor which as we know works as per the load on the engine. As per the fuel that spills out I am assuming it meets the end of the re-circulation line and goes back into the buffer tank( not sure though)
@@kanishkaroy3478 hey thanks explanation regarding the rack movement was excellent and simple.
We are manufacturer specialized in auto and marine diesel engine parts since 1952.
Our main parts are
EURO II system: plunger, nozzle , delivery valves, head rotors, repair kits, etc.
Common rail system: Injector complete and injector spare parts for CATERPILLAR, DENSO, DELPHI , BOSCH, SIMENS, CUMMINS, etc.
If you have any inquiries, pls do not hesitate to contact me.
The answer to your question is the governor. A system of weights incorporated into the pump body, driven by the pump-cam act on the governor arm, which in turn alters the position of the rack depending on operator demand. Check out the Cummins p7100, it’s a super simple system but very clear.
Furthermore, the excess fuel is referred to as “return”. The post injection event which essentially is the fuel driven through the spill port by way of the pump spring is recycled to the reservoir. If properly filtered and separated from any moisture before hand, the excess fuel should be safe to head straight to the tank, in a well serviced fuel system, of course.
Make a video on working of Tower bridge
Steam engine and Bascule drive engine
Steam engine is planned. Will note the others.
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Visit courses.savree.com and buy a course! 😀
Hi sir
Hi Naveen
SIR RETURN FUEL WILL GO BACK TO WHERE ,AFTER SPILL PORT THAT EXCESE FUEL WHERE ITS GOING?
Probably back to the fuel tank. The excess fuel will cool the pump n
Unloader valve,?
Sir, the fuel quantity is changing or not? Because we vary the timing so that our efficiency increase in low load conditions and more power is generated. But if we send more fuel than there this objective is not achieved. Please clear my doubt.
Bro..i didn't get ur question.. Fuel quantity is controlled by governor by means of rack and pinion mechanism.. Govrrner moves the rack and plunger will rotates.. This rotation of plunger contols and amount of fuel going to injector
❤
4:52
do some video about injector
It is planned. 3D model being made now.
💞
Chhan
Why this have so little views?
Niche market. Happy with what we get. Don't want to be greedy 😂
@@savree-3d You are similar to Lesics on TH-cam.
He says to comment and if there are questions he will try to answer. No answers though.
Ｐ𝐫Ｏ𝕞Ｏ𝓢ｍ 😥