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adoboandgarlicrice-deactivated2

engineandlifestyle

lil0jay

automotivetech

What do you think about Opel Astra OPC, looks amazing for me =D

#Opel Astra OPC

Common Causes of Engine Overheating

NOTE: To avoid burns and injury, never, ever attempt to remove a radiator cap while the engine is hot!

An overheated engine can be caused by anything that decreases the cooling system’s ability to absorb, transport and dissipate heat; therefore engines can overheat for a variety of reasons. Let’s take a look at some of the most common causes.

Cooling System Leaks This is the primary cause of engine overheating. Possible leak points include hoses, the radiator, water pump, thermostat housing, heater core, head gasket, freeze plugs, automatic transmission oil cooler, cylinder heads and block. Perform a pressure test. A leak-free system should hold pressure for at least one minute.

Wrong Coolant Concentration Be sure to use the coolant recommended by your vehicle’s manufacturer. The wrong type of coolant and/or mixing the incorrect concentration of coolant and distilled water can also result in engine overheating. The best bet is to perform a complete flush and fill.

Bad Thermostat A thermostat is a heat-sensitive valve that opens and closes in response to engine temperature. Heated engine coolant passes through to the radiator when the thermostat is in the open position. In the closed position, it prevents the flow of coolant to speed up the warming of a cold engine. When the thermostat gets stuck in the closed position, coolant stays in the engine and quickly becomes overheated, resulting in engine overheating.

Blocked Coolant Passageways Rust, dirt and sediment can all block or greatly impede the flow of coolant through the cooling system. This can limit the system’s ability to control engine temperature, which may result in higher operating temperatures and engine overheating. Once again, a flush and fill is recommended to remove debris.

Faulty Radiator By passing through a series of tubes and fins, coolant temperature is reduced in the radiator. Leaks and clogging are some of the most common causes of radiator failure. Any disruption in the radiator’s function can lead to elevated engine temperature and overheating.

Worn/Burst Hoses A hose that contains visual cracks or holes, or has burst will result in leaks and disrupt the flow of engine coolant. This can result in overheating.

Bad Radiator Fan A fan blows air across the radiator fins to assist in reducing the temperature of the coolant. A fan that wobbles, spins freely when the engine is off, or has broken shrouds will not be able to reduce the temperature to proper level, thus possibly resulting in engine overheating.

Loose or Broken Belt A belt is often the driving link that turns the water pump at the correct speed for proper coolant flow through the cooling system. If a belt is loose or broken, it cannot maintain the proper speed, thus resulting in poor coolant flow and ultimately, engine overheating.

Faulty Water Pump Known as the ‘heart’ of the cooling system, the water pump is responsible for pressurizing and propelling engine coolant through the cooling system. Any malfunction of the water pump, including eroded impeller vanes, seepage or wobble in the pump shaft, can prevent adequate coolant flow and result in engine overheating.

Source: http://asc-ind.com/cooling-system-information/common-causes-of-overheating/

#engine overheat temperature high car thermostat

daidegas

Honda NSX JDM, http://www.daidegasforum.com/forum/foto-video-4-ruote/522289-honda-nsx-raccolta-foto-thread.html

automotivetech

#NSX #honda #powerofdreams

So i really want to study automotive technology but i dont know what courses to take before actually taking that course im a freshman college student

It’s all about physics afterall. In a university as i am in, we study mostly about car dynamics which is based on physics. (Sorry for the delayed answer)

Which is Better, a 2 Stroke or 4 Stroke Engine?

How 4 stroke engines work.

4 stroke engines are typically much larger capacity than 2 stroke ones, and have a lot more complexity to them. Rather than relying on the simple mechanical concept of reed valves, 4 stroke engines typically have valves at the top of the combustion chamber. The simplest type has one intake and one exhaust valve. More complex engines have two of one and one of the other, or two of each. So when you see "16v" on the badge on the back of a car, it means it's a 4-cylinder engine with 4 valves per cylinder - two intake and two exhaust - thus 16 valves, or "16v". The valves are opened and closed by a rotating camshaft at the top of the engine. The camshaft is driven by either gears directly from the crank, or more commonly by a timing belt. The following animation shows a 4 stroke combustion cycle. As the piston (red) retreats on the first stroke, the intake valve (left green valve) is opened and the fuel-air mixture is sucked into the combustion chamber. The valve closes as the piston bottoms out. As the piston begins to advance, it compresses the fuel-air mix. As it reaches the top of its stroke, the spark plug ignites the fuel-air mix and it burns. The expanding gasses force the piston back down on its second stroke. At the bottom of this stroke, the exhaust valve (right green valve) opens, and as the piston advances for a second time, it forces the spent gasses out of the exhaust port. As the piston begins to retreat again, the cycle starts over, sucking a fresh charge of fuel-air mix into the combustion chamber.

How 2 stroke engines work.

A 2 stroke engine is different from a 4 stroke engine in two basic ways. First, the combustion cycle is completed within a single piston stroke as oppose to two piston strokes, and second, the lubricating oil for the engine is mixed in with the petrol or fuel. In some cases, such as lawnmowers, you are expected to pre-mix the oil and petrol yourself in a container, then pour it into the fuel tank. In other cases, such as small motorbikes, the bike has a secondary oil tank that you fill with 2 stroke oil and then the engine has a small pump which mixes the oil and petrol together for you. The simplicity of a 2 stroke engine lies in the reed valve and the design of the piston itself. The picture on the right shows a 4 stroke piston (left) and a 2 stroke piston (right). The 2 stroke piston is generally taller than the 4 stroke version, and it has two slots cut into one side of it. These slots, combined with the reed valve, are what make a 2 stroke engine work the way it does. The following animation shows a 2 stroke combustion cycle. As the piston (red) reaches the top of its stroke, the spark plug ignites the fuel-air-oil mixture. The piston begins to retreat. As it does, the slots cut into the piston on the right begin to align with the bypass port in the cylinder wall (the green oblong on the right). The receding piston pressurises the crank case which forces the reed or flapper valve (purple in this animation) to close, and at the same time forces the fuel-air-oil mixture already in the crankcase out through the piston slots and into the bypass port. This effectively routes the mixture up the side of the cylinder and squirts it into the combustion chamber above the piston, forcing the exhaust gas to expel through the green exhaust port on the left. Once the piston begins to advance again, it generates a vacuum in the crank case. The reed or flapper valve is sucked open and a fresh charge of fuel-air-oil mix is sucked into the crank case. When the piston reaches the top of its travel, the spark plug ignites the mixture and the cycle begins again.

For the same cylinder capacity, 2 stroke engines are typically more powerful than 4 stroke versions. The downside is the pollutants in the exhaust; because oil is mixed with the petrol, every 2 stroke engine expels burned oil with the exhaust. 2 stroke oils are typically designed to burn cleaner than their 4 stroke counterparts, but nevertheless, the 2 stroke engine can be a smoky beast. If, like me, you grew up somewhere in Europe where scooters were all the rage for teenagers, then the mere smell of 2 stroke exhaust can bring back fond memories. The other disadvantage of 2 stroke engines is that they are noisy compared to 4 stroke engines. Typically the noise is described as "buzzy".

A Common List of Advantages and Disadvantages

Advantages of 2 Stroke Engines: - Two-stroke engines do not have valves, simplifying their construction.

- Two-stroke engines fire once every revolution (four-stroke engines fireonce every other revolution). This gives two-stroke engines a significant power boost.

- Two-stroke engines are lighter, and cost less to manufacture.

- Two-stroke engines have the potential for about twice the power in the same size because there are twice as many power strokes per revolution.

Disadvantages of 2 Stroke Engines: - Two-stroke engines don't live as long as four-stroke engines. The lack of a dedicated lubrication system means that the parts of a two-stroke engine wear-out faster. Two-stroke engines require a mix of oil in with the gas to lubricate the crankshaft, connecting rod and cylinder walls.

- Two-stroke oil can be expensive. Mixing ratio is about 4 ounces per gallon of gas: burning about a gallon of oil every 1,000 miles.

- Two-stroke engines do not use fuel efficiently, yielding fewer miles per gallon.

- Two-stroke engines produce more pollution.

From:

-- The combustion of the oil in the gas. The oil makes all two-stroke engines smoky to some extent, and a badly worn two-stroke engine can emit more oily smoke.

-- Each time a new mix of air/fuel is loaded into the combustion chamber, part of it leaks out through the exhaust port.

So Which is Better?

At the end of the day the winner is probably going to be the one that has had more money and technology spent on it. In these days of quick and cheap international production schedules you can't take it for granted that the 4 stroke will be better. So for your particular application, line up the options and make a decision based on what's available, not based on lists that miss the key points of difference.

#2-stroke #4-stroke #advantages #disadvantages #internal combustion engine #autotech #internal #combustion #engine

alldvy

Fluro Orange SLS

I just found this interesting video about differentials on youtube. It also describes different types of differentials. This video will help you have a clear view about how a vehicle turns achieving different rounds per wheel. Enjoy.

CAN Bus Technology

CAN is short for Controller Area Network, that is a network for transferring data between the individual components of a vehicle. CAN modules are used to connect these analog components to the digital CAN Bus. This creates a shared data line to which multiple CAN modules can be attached.

At the same time, the wiring effort is vastly reduced. This also reduces potential sources of error and makes it easy to add new CAN modules.

CAN technology was developed in 1983 by Bosch especially for use in vehicles. It has been an integral part of automotive technology worldwide for many years now.

Benefits of CAN technology:

Reduction of wiring complexity

Improved system safety

More flexibility thanks to customization of functions

Improved diagnostics

More convenient controls

Simplified replacement of system components

#CAN bus technology electronics car

ADVANTAGES AND DISADVANTAGES OF A ROTARY ENGINE

What the hell is a Rotary Motor anyway? What’s all this about rotors and NO PISTONS!? Blasphemy! Actually, it’s quite simple really. As opposed to a piston motor which has a Compression and Ignition phase for each cylinder, the Rotary does it all in one rotation of the triangle shaped rotor.

Advantages

The Rotary Engine is very simple. It’s a motor design that utilizes way less moving parts than it’s piston counterpart. The 13B-MSP Renesis (from the RX8) has the highest horsepower per displacement of any naturally aspirated motor produced from the Factory in America. For it’s size, the rotary packs a punch. For reference, the 13B from the RX8 is a 1.3 liter, and produces 232 horsepower. That equates to a ridiculous 178 horsepower per liter. In Theory, that would be equivalent to a 6.0 liter LS2 (from the Corvette) producing 1068 horsepower N/A from the factory.

Unlike Piston engines, Rotaries are almost immune to catastrophic failure. In a piston motor, you can have a piston seize and cause all kinds of damage, but in a Rotary motor, while the engine will lose power, it will continue to produce a limited amount of power until it finally dies.

Rotaries will also rev to the moon and still make power. For instance, A RX8 redlines at 9k and that’s where it makes peak power as well. Needless to say, the Rotary likes to stay high in the RPM range.

Disadvantages

Some main complaints of the Rotary are gas mileage and burning oil. One of the most common misconceptions is that the Rotary engine burns oil out of fault, this is not necessarily true. The Rotary uses oil squirters that take small metered amounts of oil and mix it into the fuel to lubricate the seals. Gas mileage is very Mehhhhh at mid 20′s (supposedly….much less in reality.)

Rotaries also tend to produce about as much torque as a screwdriver and seals tend to be a big problem after a while if you live in a colder climate. Parts are generally expensive and since it’s a Rotary, you have to take it to rotary mechanic or dealership to get it worked on when something goes awry.

Rotaries sometimes have a problem flooding with fuel on cold starts as well. This generally only happens with older 13B’s, so it’s necessary to let the motor warm up to operating temperature before you decide to take off.

All in all, the rotary has it’s ups and downs, just like everything else. Nothing can really match the sound of a 26B sounding like a huge cammed V8 at idle and then revving up like a streetbike. Hopefully this article was informative and cleared up some misconceptions. Rotaries may be different, but they’ll always have a place in my heart.

#wankel #mazda rx8 rx7