Gas engines - what makes them different from diesel and petrol?

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Lubrication Explained

Lubrication Explained

2 жыл бұрын

What makes the difference between petrol, diesel, and gas fuelled engines? It's mainly down to the combustion characteristics of the fuels - gas burns hotter, and therefore requires more oxidation stability. It also requires unique storage solutions, which is why gas engines have seen most widespread adoption in power generation and gas compression applications, where gas is readily available. Small LPG-based cars are also becoming more popular, particularly among taxi fleets, and these operate on the same principle.
Become a lubrication expert: lubrication.expert
Hi I’m Rafe Britton, the Lubrication Expert. I’m known within the industry for my KZfaq channel and podcast, and I work with mid-size industrials improve their equipment uptime while reducing the cost of their lubrication program. I’m a mechanical engineer with 13 years of experience on both sides of the industry; both as an operator, and lubricant supplier. I hold a Bachelor of Aerospace Engineering and a Bachelor of Physics from UNSW.
Lubrication Expert is purposefully brand independent and sells no lubricant, filter, sensor or hardware. I’ve helped dozens of industrial clients upskill their workforce, reduce waste, improve reliability and take great strides toward their corporate sustainability goals. I serve on the Australian Lubricant Association technical committee to push the lubrication industry forward.
Industry doesn’t understand lubrication, and few people are left to teach them. This results in incorrect use of lubricants, contamination & machine failure, leaving reliability engineers frustrated with the state of their lubrication program. The ultimate consequence is more machine interventions, more waste, and more equipment downtime
What I offer is knowledge, and only knowledge. My clients gain access to my learnings both as an operator and industry insider - this includes the technical aspects of lubricant chemistry, degradation and contamination control, but also the commercial considerations so that you can better leverage your supplier relationships.
The result? A world-class lubrication program that optimizes for reliability, reduces waste and improves sustainability outcomes.

Пікірлер: 32
@LubricationExplained
@LubricationExplained 2 жыл бұрын
Looking for more structured lubrication courses? Join LE Pro for $30AUD per month (that's about 20USD). lubrication.expert/product/le-pro/
@Trusworthy973
@Trusworthy973 Жыл бұрын
Hi Raffe, I hope you’re doing well. If I start from May,2023,how long would it take/cost to get certified become a technical lubricant professional? I would be thankful to you for your quick response.
@navaneethakrishnans1299
@navaneethakrishnans1299 3 ай бұрын
Excellent sir. Great and exhaustive work of yours is driving me to all your episodes no words from me to thank you as they are nothing to the values, I feel.
@jediali221
@jediali221 2 жыл бұрын
thanks for sharing. Interesting to note that engine lube oils designed for 'gas' engines tend to be more tolerant of the gas contaminants that could lead to poor TBN or corrosion.
@LubricationExplained
@LubricationExplained 2 жыл бұрын
Yeah, although some diesel engine oils do tend to have higher BN, particularly the marine engine oils.
@steffenleo5997
@steffenleo5997 Ай бұрын
thank you for well explained videos Sir.....👍👍
@VHP7044
@VHP7044 4 ай бұрын
Lean burn is more efficient. Rich burn with 3 way catalyst can achieve lower overall emissions rates than a lean burn. Both types have their advantages. Please read EGSA power generation reference book chapter on large liquid cooled spark ignited engines.
@edogsx
@edogsx 2 жыл бұрын
it would be interesting to make a video about the characteristics of motorcycle lubricants, especially what the presence of the wet clutch entails and the jaso MA MA2 specifications.
@LubricationExplained
@LubricationExplained 2 жыл бұрын
I've had a couple of requests for this. It's on the list!
@qaisibrahim5674
@qaisibrahim5674 2 жыл бұрын
Thanks for the informative video
@LubricationExplained
@LubricationExplained 2 жыл бұрын
No worries!
@jamesmcallister458
@jamesmcallister458 2 жыл бұрын
Thanks Rafe, this is a very clear and understandable explanation. Really appreciated.
@LubricationExplained
@LubricationExplained 2 жыл бұрын
Thanks James!
@Errol.C-nz
@Errol.C-nz Жыл бұрын
however incorrect it fundamentally is.. the fuel ignition methods set significantly different design demands.. same applies to "2-stroke" comparisons.. as an example theres NO similarities between uniflow vs loop scavenged "2-strokes".. both 2-strokes!!.. nothing comparable.. homogenous charge compression ignition exemplifies the fundamental difference design demand.. applying diesel principles to "gas" fueled piston engines.. no mention of why diesel engine donut piston crown chambers.. thats a fundamental demand difference
@tomasnokechtesledger1786
@tomasnokechtesledger1786 2 жыл бұрын
Great video, Mr. LE! I wonder how much soot a 15w40 semusyn Diesel engine Lube can handle vs. a common semisyn 15w40 Gasoline Lube ?
@LubricationExplained
@LubricationExplained 2 жыл бұрын
Good question! Unfortunately I don't have a great answer at the moment. I ask around.
@em4703
@em4703 Жыл бұрын
A lot more soot, since it has special additives due to diesel oils requiring them to dissolve and keep soot in suspension. That's not really an issue with gasoline oil.
@Errol.C-nz
@Errol.C-nz Жыл бұрын
@@em4703 gasoline exhaust is far more acidic & exh water is more prevalent.. do a hot vs cold oil change & see the resultant water in the oil especially cars that do a lot of short runs
@Andersljungberg
@Andersljungberg 8 ай бұрын
Are you talking about CNG So natural gas or biogas
@canto5858
@canto5858 2 жыл бұрын
Hey, I made a synthetic lubricant but want to make it thicker, right now its probably close to 140W but I want it closer to 240W. What should I add? Also, this lubricant is used on pivots so temperature is not a concern. I am not very experienced with oil making, sorry about that.
@LubricationExplained
@LubricationExplained 2 жыл бұрын
Good question. That's a pretty big jump that you're looking for. What base oil did you use? You might need to start with a higher viscosity grade. You could use a bunch of PIBs to jack up the viscosity but I don't think that would be ideal...
@em4703
@em4703 Жыл бұрын
Use grease...
@Andersljungberg
@Andersljungberg 8 ай бұрын
You can apparently convert a diesel engine so that it can run on gas
@Andersljungberg
@Andersljungberg Ай бұрын
Passat had both turbo and supercharger
@NiklasKontio
@NiklasKontio 18 күн бұрын
The more emissions the better
@ultimoarrivato6134
@ultimoarrivato6134 Жыл бұрын
Per inferiori
@NiklasKontio
@NiklasKontio 18 күн бұрын
Let's go Brandon!
@otm646
@otm646 Жыл бұрын
You need to modify the title of this video with lpg/cng in parentheses. It is not plainly obvious for the first quarter of your video that you do not mean gasoline to the majority of the native English speaking world.
@froggy0162
@froggy0162 Жыл бұрын
You mean Americans? Most English speaking countries use the term Petrol.
@Unknown-jl7mg
@Unknown-jl7mg 2 жыл бұрын
endless debate that lpg destroys engines... i find it funny, gas flame is colder than gasoline. en.wikipedia.org/wiki/Adiabatic_flame_temperature these guys measured exhaust temp, and lpg was colder by 20 deg c kzfaq.info/get/bejne/geCVnZaI38nacYE.html
@qaisibrahim5674
@qaisibrahim5674 2 жыл бұрын
But I once read a study that shows it bruns hotter because It doesn't cool the valves like petrol does therefore LPG might (not destroy) cause valve recession
@LubricationExplained
@LubricationExplained 2 жыл бұрын
Yeah I don't think it's necessarily going to destroy an engine given there's plenty of perfectly functional has engines out there. But the combustion characteristics are definitely different. It's flame speed as well as temperature.
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