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Hard to get them to meet new emission standards...its impossible for Wankel/rotary engines to meet emmissions standard due to a serious fundamental design flaw. That is, the piston crown and combustion chamber surface area ratio to the cylinder and combustion "chamber" volume. The dish in the middle of the rotor. Its like a very (very) short stroke conventional engine. This results in a very large dead space (typically referred to as squish area) when the piston is at top dead center (TDC). This squish area ejects a large portion of the air to be used for combustion, into a more compact chamber either in the cylinder head, or in the piston or rotor crown (as is the case with the wankel). While this "squished" air help generate turbulence for an effective and rapid burn at ignition, there is (in the wankel) a large portion left in the space between the rotor and cylinder perifery, which, while it eventually burns, it doesn't burn efficiently (completely) through the period of peak compression. Further, there is a zone around the rotor sides where there is more dead space above the rotor side seals and chamber that burns very late and poorly in the process. Further to all this...when the rotor is at TDC, there is a large...I mean "large" banana shaped area each side of the rotor "chamber", between the chamber & rotor tips with a massive surface area vs volume of air for combustion. This banana shaped volume creates a very long path for ignition and the surface area quenches a lot of the initial heat from the ignition and impairs the combustion reaction markedly. Having said all this, the wankel engine is a very mechnical efficient design, albeit with an inherant serious flaw goemetrically impossible to over come.
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Where are steam engines most widely used?
I believe steam engines are still widely used in China
What cars have used a rotary engine?
mazda rx7 Cars that have used a rotary engines 10A, 12A, 13B, 20B: mazda...Cosmos, R100, RX2, RX3, RX4, RX5, RX7,& R8 Rotary engines where first designed by Mercedes and then sold to mazda and build in Heroshima, they where also used by NASA in a single rotor format.
Does a helicopter have a rotary engine?
No, rotary engines went out of use in aircraft in WW1.
The four types of siege engines?
Straight/Inline engines, V type engines, Rotary engines and diesel engines
Does the Mazda 3 hatchback have a rotary engine?
no, the ONLY cars with rotary engines have RX in there name.
Are rotary switches still used widely?
In some places they are. It just depends on the preference of the person to use them.
What is rotary piston engine?
The term rotary piston engine can have several meanings:Rotary engine, the piston engine that rotates in operation, as used on World War I fighter aircraftPistonless rotary engine, the engines which use rotors or rotary pistons instead of conventional reciprocating pistons
What is similar between a car and plane?
Rotary Engines
Is it possible to fly using automobile engine instead of rotary engines?
no it cant be used bcoz a automobile engine is either 2 or 4 strokes were a rotary engine needs many cylinders......................
Does a plane have the same engine as a cars?
No, planes have either a rotary or turbine engines and most vehicles (excluding the Mazda RX-7 and RX-8, which both have rotary engines) have crank and piston engines. Some small planes (such as the piper cub) have piston props. In fact, the Rolls Royce merlin engine used in the spitfire was also used in some custom/modified cars.
Engines that operate with rotors instead of pistons or cylinders are seldom used in modern automobiles because?
1. Problems with emissions control. Rotary engines use direct oil injection and this means oil is constantly burning with the fuel. 2. Economies of scale. Due to the complex nature of rotary engines very difficult to repair in relation to piston engines and very few people are trained to maintain and build these engines 3. Fuel consumption. Rotary engines are notoriously expensive to run on fuel. 4. Lack of low down torque/driveability. Rotary engines makes a tremendous amount of power at high RPM but insignificant torque in the lower rev ranges. 5. Ignorance. If more people disregard all of the above and eventually get to drive a rotary powered for for a while, they'd be converted. Unfortunately almost all rotary owners are petrolheads and adrenalin junkies!
What Make or model of car is a type of phone?
The only thing I can think of is the word "rotary". There are rotary engines and old rotary phones that had dials....hope this helps.
