Mazda's Secret To Efficient Turbo Engines

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Published 2018-08-05
How Mazda Makes Turbocharged Engines Efficient In The Real World
Small Turbo Engines Aren't Efficient? -    • Why Small Turbo Engines Are Not Effic...  
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Mazda's 2.5L turbocharged inline four-cylinder engine won a Ward's Auto 10 Best Engines award in 2017 for the CX-9. The engine is now also used in the 2018 Mazda 6. The engine produces 227 horsepower on regular gas, and 310 lb-ft of torque. It has a unique approach for downsized turbo engines, which generally result in good fuel economy at low loads, but fail to provide efficiency when the driver demands more power.

Several of the clever technologies within this engine include a 4-3-1 exhaust that maximizes exhaust scavenging for turbocharged engines, while also providing two separate airflow paths to keep the turbo spooled at both low and high RPM. The engine also has cooled EGR to increase the load at which a stoichiometric air fuel ratio can be used. Check out the video for full details about how this engine provides loads of torque, but still offers good fuel economy.

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All Comments (21)
  • @RalstigRacing
    This is why, to me, Mazda is the most exciting car manufacturer right now. They are really letting their engineers have fun and design fundamentally good engines.
  • @metalbyku
    Mazda is most underrated car manufacturer. Always been. Mazda's game is very strong now. Both engeenering and design
  • @aaronhowell2011
    Mazda’s reason for including EGR really makes me like them so much more. EPA doesn’t change, but they want for the customer to get real results. So good.
  • @spamcan9208
    I love Mazda, they're the little company that could. My next car will be a Mazda.
  • @waydigga1982
    Mazda is truly a champion of the ppl. I feel like ppl that buy these types of cars may not care as much about fuel economy, but its nice that Mazda is delivering real world numbers instead of lab numbers.
  • @strangeclouds7
    EE's Sunday morning uploads are just like Saturday cartoons as a kid.
  • @coscorrodrift
    Damn, very interesting conclusion at the end, i think it's the right decision, props to Mazda for that. They may get less mainstream attention but for people who care like the people watching this channel it's surely good publicity to do that instead of going the cheating emissions route lmao
  • @TheZProtocol
    Mazda is a very underrated automaker. They really stand out from the rest in styling and engineering!
  • @AHMEDMOOSAJI
    This is commitment You just got married and still posting Hats off
  • @matt_b...
    How do you start your Sunday? "Hello everyone, and welcome!" Thanks for another great video this week.
  • @dwoodcob
    Mazda have been saying recently that they have found a way to double the efficiency of the 13b Renesis (RX8) Rotary engine. Many have been wondering how, including me for a while. Part of the problem with the Rotary is how hot the combustion chamber gets in these power plants. Mazda have leaned on using very rich fuel mixtures to address this in the past. Watching this has made me think, maybe they plan implementing some style of cooled EGR system for a Rotary? @EngineeringExplained what is your take on that’s?
  • @Tiggzne24
    Thank you for this video. I'm currently looking to upgrade my Mazda 3 GT to a 6GTR, but growing up I heard 4cyl turbos were bad news. Now I'm actually impressed and excited that I get to be a part of such an advanced and intelligent brand.🖖🏾👍🏾
  • @ben079329
    Faszinating technique. I really Like mazdas Philosophy to Focus on the needs of the customer
  • @pvflyer67
    My wife just bought a CX9 signature and all I can say is it doesn't feel like a 4cyl feels more like a 6cyl. So much torque, however you have to run higher octane 92 in order to achieve higher HP's. thanks for all those great videos
  • @mikeculp92
    I have a CX9 with this engine and I have to say it's pretty impressive. I do actually get the fule economy that they advertise and I'm happy with the power. Under normal circumstances I get about 26-27 mpg (in a 7 passenger suv)
  • @2W3X4YZ5
    I switched from a 5.3 liter GMT-900 truck to this engine in a CX-9. I truly believe it produces more torque than the other engine. Any truth to the rumor that the next gen of SkyActiv engines will not have spark plugs?
  • @2009wookie
    I have both a 2019 Mazda CX-9 and a 2017 Mazda 3 with a manual transmission. They are phenomenally engineered vehicles, a blast to drive and very reliable. For cost to fun factor Mazda leads the way for driving enthusiasts.
  • I click on EE and see this crazy white board full of different colors and think I will never figure it out. By the time your done with your presentation, I completely understand it all. Im not quite sure how you do it, but please never stop! Thank you very much for all of your time and efforts sir!