Car Tech 101: Variable valve timing explained

Описание

Few innovations under the hood have become as ubiquitous as variable valve timing. Automakers brag about it all the time, but seldom explain it. So Brian Cooley's here to do just that.

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Subscribe for new videos every Wednesday! - https://goo.gl/VZstk7 Related Videos Engine Balance - http://youtu.be/aonbwOxooGA Primary Balance - http://youtu.be/9Bdc9CuBOzc Secondary Balance - http://youtu.be/gdHQ8aTfiQQ 3D Printed I4 - https://youtu.be/LglOUj7AsQA 3D Printed Boxer 4 - https://youtu.be/y5oRsvRH_Ig 3D Printed Models - Big Thanks To Eric Harrell: Straight-4 Model: https://www.thingiverse.com/thing:644933 Boxer-4 Model: https://www.thingiverse.com/thing:1643878 In this video we are going to be comparing inline four cylinder engines with boxer four cylinder engines, and talking about the individual advantages and disadvantages of each engine layout. We have a 3D printed EJ20 Subaru boxer engine, as well as a 22RE Toyota inline-four engine. We’ll start fairly basic and work our way through several different topics for each layout, including the four strokes, the firing interval and order, the vibrations of each layout, the packaging differences, the cylinder head differences, and finally a bit about the sound. Looking at either layout, they’re both based on the same four strokes. Intake, compression, power, and exhaust. Both engines fire one cylinder for every 180 degrees of crankshaft rotation, but they have slightly different firing orders. On each engine, we can see cylinders one, two, three, and four. For the boxer engine, the firing interval is one, three, two, four, while on the straight four it’s one, three, four, two, so the order of the last two cylinders firing is switched. On the boxer engine, you’ll notice the pairs of pistons move in and out together. This means that the primary forces when the piston reaches the top of the cylinder, as well as when they reach the bottom of the cylinder, are canceled out. On the inline four cylinder engine, it’s the same story, the primary forces cancel out as the pairs of pistons reach the top and bottom at the same time. When we get into secondary forces, however, the engines begin to differ. Secondary forces are created due to the piston traveling faster at the top half of the piston than at the bottom half, something I’ll include a link to in the description for a video that breaks it down in great detail. What you need to know though, is that when the piston reaches the very top of the cylinder, or the very bottom, the secondary force points up or out from the piston. Now with the boxer engine, since the pistons point opposite each other, these forces are balanced out, resulting in a very smooth running engine. For the inline four, all of the forces point in the same direction, and thus do not cancel each other out, causing the engine to vibrate unless balancing shafts are used. The boxer engine isn’t perfect, however, because the pistons do not perfectly align with each other, it creates a rocking moment which makes the engine want to rotate back and forth along the vertical axis. What’s fascinating, however, is that if you add two cylinders to either of these designs, whether it’s a boxer six or an inline six, you can perfectly eliminate all first and second order forces and moments. You might think the boxer six would have a rocking motion from the cylinder banks of three, but each bank of three cylinders cancels out the rocking motion of the other, unlike in a V6 configuration. The other biggest advantage of the boxer engine is the low profile, which keeps the center of gravity low and thus reduces the amount of load transfer you have in the car during braking, cornering, or accelerating, which improves grip. With a lower center of gravity, you can also reduce body roll and choose to use softer springs. Additionally, in the event of a collision, it’s easier to position the engine so that it goes underneath the passenger compartment, rather than into the passenger compartment, for improved safety. That’s not to say the inline four doesn’t have it’s own size advantages. Generally it’s a bit more compact, with only one cylinder head, and it’s not quite as wide as the boxer engine. This leaves more room for suspension geometry, and can also allow for a better steering angle, since the tires won’t have as much of an interference at full lock. Don't forget to check out my other pages below! Facebook: http://www.facebook.com/engineeringexplained Official Website: http://www.howdoesacarwork.com Twitter: http://www.twitter.com/jasonfenske13 Instagram: http://www.instagram.com/engineeringexplained Car Throttle: https://www.carthrottle.com/user/engineeringexplained EE Extra: https://www.youtube.com/channel/UCsrY4q8xGPJQbQ8HPQZn6iA NEW VIDEO EVERY WEDNESDAY!

2 лет назад
CNET On Cars - Car Tech 101: What is Skyactiv technology?

CNET On Cars - Car Tech 101: What is Skyactiv technology?

http://cnet.co/MRc5os CNET's Brian Cooley explains Mazda's Skyactiv gas engine technology and how it works.

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Top 5: Stick shift cars

Top 5: Stick shift cars

Manual-transmission cars are hanging on to their fan base like the vinyl LP's of the road. CNET's Brian Cooley shares his top 5 cars with a clutch.

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Intake Manifold - Explained

Intake Manifold - Explained

What is an intake manifold? How do intake manifolds work? What is a performance intake manifold? This video features a Skunk2 Pro series intake manifold courtesy of Redline360.com. Intake manifolds are the connection between the throttle body and the cylinder head. They also serve as a hub for connections like the IAT sensor, the EVAP purge valve, the fuel rail, the breather hose, and a vacuum connection for power brakes. Check out the performance intake manifold from the video here: Skunk2 Intake Manifold: http://www.redline360.com/skunk2-intake-manifold-acura-integra-ls-gs-rs-non-vtec-307-05-0280 Redline360: http://www.redline360.com Related Videos: Gas Pedal - http://youtu.be/smI2ijg4KcM Power Brakes - http://youtu.be/LThrL8Jjsgc Please feel free to rate, comment, and subscribe! And don't forget to check out my Facebook page: http://www.facebook.com/engineeringexplained Also check out my official website: Make suggestions, participate in forums, learn through logically ordered lessons, read FAQs, and plan your future! http://www.howdoesacarwork.com Now on Twitter: http://www.twitter.com/jasonfenske13 NEW VIDEO EVERY WEDNESDAY!

6 лет назад
How V8 Engines Work - A Simple Explanation

How V8 Engines Work - A Simple Explanation

What Is A V8 Engine? Working 3D Printed Chevy LS V8 Engine EE Shirts! - http://bit.ly/2BHsiuo Recommended Books & Car Products - http://amzn.to/2BrekJm Subscribe for new videos every Wednesday! - https://goo.gl/VZstk7 3D Printed LS3 Camaro V8 Engine Model: https://www.thingiverse.com/thing:1911808 V8 engines operates under the same basic principles as any other gasoline four-stroke engine. First the piston pulls in air and fuel as it moves downward, then it compresses that air and fuel as the piston moves upward. A spark plug fires, igniting the air/fuel mixture and forcing the piston downward. Finally the piston pushes out the exhaust gases on its way back up, before for the cycle repeats itself. In a V8 engine, this cycle is happening in 8 different cylinders, at different times. Instead of multiple cylinders firing at the same time, you want them to be spread out so that power delivery is smooth. For this Chevy V8, the firing or is 1, 8, 7, 2, 6, 5, 4, 3. With 8 cylinders, there is a cylinder firing for every 90 degrees of the crankshaft rotating, which means at any point in time, there are two cylinders on the power stroke. With regards to the valvetrain, the intake air comes from the top of the engine, and into the sides of the cylinder head. The exhaust flows to the sides of the engine, exiting the exhaust valves from the cylinder head. In this LS3 model, there is a single intake valve and a single exhaust valve, though it’s also common to see engines with two intake valves and two exhaust valves. The larger valve is the intake valve, and the smaller valve is the exhaust valve. The pushrod valvetrain gets its name from the metal pushrods which activate the rocker arms which open up the valves. The camshaft, located in the center of the V, has lobes on it which push the push rods up, opening the appropriate valves. For a full explanation of V8 engines, check out the video! Related Videos: Inline-4 vs Boxer 4 Engines - https://youtu.be/mgpDTVBeHOw Horsepower vs Torque - https://youtu.be/u-MH4sf5xkY VR6 Engines - https://youtu.be/6UZRmNXzveQ V5 Engines - https://youtu.be/TsaKRaAIyVE Wankel Engines - https://youtu.be/sd6pJtR4PaY Engineering Explained is a participant in the Amazon Influencer Program. Don't forget to check out my other pages below! Facebook: http://www.facebook.com/engineeringexplained Official Website: http://www.howdoesacarwork.com Twitter: http://www.twitter.com/jasonfenske13 Instagram: http://www.instagram.com/engineeringexplained Car Throttle: https://www.carthrottle.com/user/engineeringexplained Amazon: https://www.amazon.com/shop/engineeringexplained EE Extra: https://www.youtube.com/channel/UCsrY4q8xGPJQbQ8HPQZn6iA NEW VIDEO EVERY WEDNESDAY!

10 месяцев назад
Carburetors vs. Electronic Fuel Injection—What’s Better? | MC Garage

Carburetors vs. Electronic Fuel Injection—What’s Better? | MC Garage

Your motorcycle is either being fed fuel through a carburetor with jets, or via a throttle body with an injector. What happens when these two systems face off? We’ll find out in this video from the MC Garage.

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Sistema de distribucion variable VTC

Sistema de distribucion variable VTC

Descripción del sistema de distribución variable, que permite modificar los ángulos de apertura de las válvulas para aumentar el tiempo de llenado y vaciado del cilindro cuando el motor gira alto número se revoluciones y el tiempo disponible para ello es menor. Estos sistemas permiten utilizar el tiempo óptimo de apertura y cierre de las válvulas a cualquier régimen de giro del motor. Para comprender este video se debe contar con una noción del funcionamiento de un motor multivalvular (con dos árboles de levas), de los componentes básicos y como se interrelacionan entre sí

10 лет назад
How Engines Work - (See Through Engine in Slow Motion) - Smarter Every Day 166

How Engines Work - (See Through Engine in Slow Motion) - Smarter Every Day 166

Please Re-subscribe and "hit the bell" http://bit.ly/Subscribe2SED My keychain: https://goo.gl/sN7PKJ Patrons made this happen: https://www.patreon.com/smartereveryday Click to see my Audible Library: http://www.smartereveryday.com/audible ⇊ More links! ⇊ Click here to tweet this video: https://goo.gl/xKoD5L Behind the Scenes: https://youtu.be/DmLDfwfAtE8 805RoadKing's Channel https://www.youtube.com/user/805ROADKING Mike's Channel https://www.youtube.com/user/SmallEngineMechanic Bill's Channel https://www.youtube.com/user/dirtbike5100 Gordon's song can be purchased here: https://ashellinthepit.bandcamp.com/album/smarter-every-day-vol-ii ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ GET SMARTER SECTION https://www.youtube.com/watch?v=xe-f4gokRBs ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Tweet Ideas to me at: http://twitter.com/smartereveryday I'm "ilikerockets" on Snapchat. Snap Code: http://i.imgur.com/7DGfEpR.png Smarter Every Day on Facebook https://www.facebook.com/SmarterEveryDay Smarter Every Day on Patreon http://www.patreon.com/smartereveryday Smarter Every Day On Instagram http://www.instagram.com/smartereveryday Smarter Every Day SubReddit http://www.reddit.com/r/smartereveryday Ambiance and musicy things by: Gordon McGladdery did the outro music the video. http://ashellinthepit.bandcamp.com/ The thought is it my efforts making videos will help educate the world as a whole, and one day generate enough revenue to pay for my kids college education. Until then if you appreciate what you've learned in this video and the effort that went in to it, please SHARE THE VIDEO! If you REALLY liked it, feel free to pitch a few dollars Smarter Every Day by becoming a Patron. http://www.patreon.com/smartereveryday Warm Regards, Destin

2 лет назад
Mazda's Secret To Efficient Turbo Engines

Mazda's Secret To Efficient Turbo Engines

How Mazda Makes Turbocharged Engines Efficient In The Real World Small Turbo Engines Aren't Efficient? - https://youtu.be/9aO2vC_iMTI Subscribe for new videos every Wednesday! - https://goo.gl/VZstk7 EE Shirts! - http://bit.ly/2BHsiuo Recommended Books & Car Products - http://amzn.to/2BrekJm 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. Engineering Explained is a participant in the Amazon Influencer Program. Don't forget to check out my other pages below! Facebook: http://www.facebook.com/engineeringexplained Official Website: http://www.howdoesacarwork.com Twitter: http://www.twitter.com/jasonfenske13 Instagram: http://www.instagram.com/engineeringexplained Car Throttle: https://www.carthrottle.com/user/engineeringexplained Amazon: https://www.amazon.com/shop/engineeringexplained EE Extra: https://www.youtube.com/channel/UCsrY4q8xGPJQbQ8HPQZn6iA NEW VIDEO EVERY WEDNESDAY!

7 месяцев назад
CNET On Cars - Car Tech 101: Turbos vs. Superchargers

CNET On Cars - Car Tech 101: Turbos vs. Superchargers

http://cnet.co/11OT5uT Learn the difference between two high tech trends to increase power with less fuel.

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how to toyota 1c 2c 3c diesel engine timing installation urdu in hindi

how to toyota 1c 2c 3c diesel engine timing installation urdu in hindi

Assalamu Alaikum dosto Aaj hum Aap Ko batayen ge diesel engine ki timing ke baare mein 1C C2 3C ki timing Kaise set ki Jati Hai Toyota Corolla 2 OD Diesel engine agar koi baat samajh mein Na Aaye Toh Hum comments Main pooch sakte hain Hamari video ko like zaroor kijiye ga thank you Allah Hafiz

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Top 5: Three-cylinder engines

Top 5: Three-cylinder engines

Brian Cooley runs down his top five powerful peg legs.

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Mercedes-Benz CAMTRONIC | VIRTUAL ANIMATION

Mercedes-Benz CAMTRONIC | VIRTUAL ANIMATION

Mercedes-Benz CAMTRONIC is an innovative engine management system that reduces an engine's CO2emissions. It optimizes fuel consumption in the engine's frequently used lower partial load range by reducing losses relating to load change behavior. Mercedes-Benz equips its 1.6-liter variant of the M270 four-cylinder gasoline engine with the intake valve lift adjustment amongst others. The system operates mechanically, but is served by an electronically controlled actuator. The intake camshaft is made up of several components: two hollowed-drilled sub- shafts of equal size are mounted on the carrier shaft. The first sub shaft controls the intake valves of cylinders 1 and 2, and the second those of cylinders 3 and 4. The cams themselves take the form of a double-cam with two curved surfaces. The surface operating the valves via roller-type rocker arms is only half as wide as on a conventional cam, therefore the space requirement is the same. When the steeper half of the cam is active, the valve lift is increased and the valves remain open for longer. Switching to the flatter half of the cam shortens the valve lift and the valves close sooner. ►IF YOU LOVE CARS, YOU SHOULD SUBSCRIBE NOW TO GOMMEBLOG'S CHANNEL ►►► http://bit.ly/12ULPud ►SE AMI LE AUTO .. NON PERDERTI TUTTI I NUOVI VIDEO. ISCRIVITI ADESSO ►►► http://bit.ly/12ULPud ►Google +: https://plus.google.com/101792401712738693835/ ►Facebook: http://facebook.com/gommeblog ►Twitter: https://twitter.com/gommeblog ►Website: http://www.gommeblog.it ►Gommeblog.it: CAR CHANNEL. Videos about Cars, Video Motorbikes, News, Test Auto & Motos, Test Drive, Video Reviews, Motorsport News and Track Lap. News About the Most important Cars and Motorbikes Bands like Ferrari, Lamborghini, Audi, BMW, Mercedes-Benz, Porsche, Koenigsegg, Bugatti, Ducati, Yamaha, Kawasaki .... ►THANKS for taking the time to visit, I hope you SUBSCRIBE and enjoy the upcoming videos!

4 лет назад
Petrol (Gasoline) Engine vs Diesel Engine

Petrol (Gasoline) Engine vs Diesel Engine

Help us to make future videos for you. Make LE's efforts sustainable. Please support us at Patreon.com ! https://www.patreon.com/LearnEngineering Have you ever wondered why there exists 2 different engines, Diesel and Petrol (Gasoline) ?. This video is aimed at giving a logical illustration of differences and advantages of diesel and petrol engines. It also answers the questions like, what if I put petrol into a diesel engine or vice versa. Like us on FB: https://www.facebook.com/LearnEngineering Voice-over artist :https://www.fiverr.com/mikepaine

4 лет назад