- SUBARU Flat Six Engine Block And Head

I've Had An Idea

Be Afraid, Be Afraid. It's OK it's for an engine.

1y ago

Lately I have been trying to expand my knowledge about cars, particularly how they work mechanically, by watching YouTube videos mainly, such as Engineering Explained, How Cars Work and Learn Engineering. I've really been enjoying it. Those eureka moments when things click like '' Aah, That's why they do that, clever that!'' It's why I like science and engineering documentaries so much. Whilst on my learning path I came across videos on the 'flat' or 'boxer' engine. And one by fellow DriveTriber Jason Fenske on how inline six cylinder engines balance out by the firing stroke by the compression stroke on another cylinder being at the same time. I think that's, right please do correct me if i'm wrong Jason. After this I really wanted to learn more about six cylinder engines particularly flat six engines. Which brings me to another engineering learning tool. Car Mechanic Simulator 2018 (PS4)

I think it was around June when CMS 2018 (a game not really on my radar) came to PS4. I watched a bit of YouTube gameplay footage and thought I'd check the price out. On the online store I went and it was £25. ''I'll throw 25 quid at that'' I said. I have to say I really like it. I mean it has many flaws, mainly the controls because it's a PC game and is made for a mouse and keyboard. Sidenote : the PS4 has USB connections the same as my laptop but the mouse doesn't work. The best thing for me is that now I can identify and name a lot of car parts just by opening a bonnet. So, after getting through a lot of the 'missions' then came along came the DLC with real cars from manufacturers such as Ford, Pagani and Porsche. This was around the time I was looking into flat six engines and Porsche are known for flat six engines. So I immediately bought the Porsche DLC for 5 pounds (I have since bought the bundle pack with every single part of DLC). And this is when I started thinking...

What if you took a flat six engine head and block and stood it on it's side so it was like an inline three with opposed pistons, and then what if you had another bank of them next to it. So it was a 12 cylinder. After weeks and weeks of mulling it through and researching stuff, coming to dead ends and finding a work around, then another dead end I think I've got a way that this might work. To show this I've made a 'model'. So here it is...

Ignore Tutankhamen

Firstly the 7up cans represent the central crankshaft section of each pair of cylinders. The tall thin 250 cans (mostly Coca-Cola) represent the pistons themselves. The Pringles tube in the centre with the lid stuck to the front represents the Crankshaft and the Crankshaft Pulley, which would drive the gearbox on the reverse side and run the pumps and the Alternator on this. This Crankshaft would have to be connected by chains (or belts) from the banks of cylinders at either side. They would have to be in a constant oil bath if they were chains, which I think would be best. The two gravy tubs and the coffee tub at the bottom are from left to right are Water Pump, Alternator and Power Steering Pump. Labelled W, A and P if you look closely. The wire shows how the belt would run around them. Then, I propose that the belt goes directly upwards on each far side to idler rollers with a belt tensioner slightly offset. Please excuse my finger drawing on my Galaxy S6 but something like this...

Actually in hindsight since looking back at this I think there may need to be another roller underneath the top left one to stop the belt rubbing on the belt tensioner, but I don't fancy messing with my phone again. Or maybe there's just an altogether more efficient way of doing it.

If your thinking about camshafts and valves I've got you covered. On one of my many internet and YouTube rambles I decided to indulge in some hypercar drooling, which led me to videos on Koenigsegg and it became apparent that the owner of Koenigsegg wasn't your average owner of a large company, who hid in an office pen-pushing and sent out representatives to blast you with PR and marketing. Ohhh no. He turns up for the interview himself and is really knowledgeable about his product and has a visible passion for his cars. I love that. Anyway, back to valves and cams. You see, a subsidiary of Koenigsegg has a project called FreeValve, which in short and simple terms is a pneumatic and hydraulic actuator system to replace both the camshaft and valves. Drastically reducing the weight and size of an engine. Also massively reducing the vibration and wobbling too. This is why my 'model' does not have a camshaft and valves on it. Even more good news is that the opening and the closing of the valves happens immediately by actuator rather than gradually by camshaft because of the curved surface of said camshaft. FreeValve would I think, mean being able to shut off cylinders, so you could have the top six cylinders shut off and cruise through traffic whilst being less noisy, less polluting and saving fuel.

Also, I feel I need to point out that the 250ml cans (tall thin ones, mostly Coca-Cola) are very thin and I think that makes 'engine' look taller than it would be, because a 250cc piston would be shorter and fatter making the engine lower and more squared. Thinking about that the engine would be a 3 litre, which is nice. All we need now, apart from a few million pounds to research, develop it and then build it is a name. I'm going for the 'cuber engine' layout. Any advances on cuber....

Thanks For Reading My First Ever Article!

Don't forget to answer the poll. Right, I'm off to bed. It's late now...

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Comments (21)

  • I couldn't ignore King Tutenkahmen.

      1 year ago
  • before you go any further....what do you do about oil flow in total for the blocks? something to think about. also...there were inverted v12's in ww2. see how they handled the problem. there was also the brm stacked engine in early f1 competition. that's a lesson on complication. R&D is a rough road to travel! :-)

      1 year ago
    • Three oil flow bores through the heads. One for oil bath for central crankshaft and each head. Will need a separate oil pump just for oil bath. Oil pan should be shaped like \_/ at the bottom. That should keep the flow rather than oil clogged in...

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        1 year ago
    • how about scavenge pumps for the heads(see inverted v12).

        1 year ago
  • Check out a deltic. en.m.wikipedia.org/wiki/Napier_Deltic

      1 year ago
    • A connected triangle with with opposed pistons AND supercharged that's proper wacky. I'm glad I made my article I've learned that they make the engine I thought of for planes AND now the deltic. Thanks John.

        1 year ago
  • They have long since beaten you to the H layout. It's more commonly used in aircraft were Boxers and flats are already pretty common and things like Radials are not the problem they are in cars. The only Car I know of to use this engine configuration is the F1 team BRM (British Racing Motors) in a Lotus Chassis with a 3L H-16 (2 1.5L flat 8's stacked on top of each other and connected with gears) Driven by Jackie Stewart and Graham Hill. The car was not very successful with 14 race starts 0 wins and 0 poles, and was known for it's reliability issues and being heavy (not a good feature in a Lotus Chassis) and having lots of vibration issues.

    In verifying my memory on BRM I also see on Wikipedia that an H engine was developed for use in a Motorcycle but WWII prevented it being produced. Not sure how great that would be on 2 wheels.

    As for your poll... something else... since it is already known as an H engine.

      1 year ago
    • Gonna have to have a look on Wiki now lol.

        1 year ago
    • Flat engines on top of each other with same crankshaft are an H layout even though it's an H on its side. Straight engines side by side are a U type layout. I'm guessing that crankshaft is at the bottom and connected diagonally like \./ if you see...

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        1 year ago
  • You should try watching some ChrisFix, his videos are mainly about repair. But there’s lots of good things to learn from his content

      1 year ago
    • I'm subscribed to him. Mainly so I might be able to save some.money by fixing something myself. Which is kind of the point of his channel I think.

        1 year ago