rotary engine Mazda's 767B with pure MOTOR NICE WANKEL "BLIPS"
Mazda Wankel engines a type of rotary combustion engine include a family of cars derived engine experiments in the early 1960s by Felix Wankel German engineer Over the years, the movement has been increased and turbochargers added.
Wankel engines can be classified according to their geometric size based on center of the rotor radius at the cutting edge distance, as the median radius of the stator and the rotor thickness depth and offset crank button, eccentricity, also April 1 the difference between the major and minor axes These metrics stator similar function to the drilling action and the stroke of a piston displacement engine is 3 3radius offset depth, multiplied by the number of rotors note that this account that a single face of each rotor as displacement of the rotor assembly Almost all Mazda Wankel engine production from a single radius of the rotor, 105 mm 4 1 with a 15 mm 0 6 crankshaft offset single motor to diverge from this formula was rare 13A using a 120 mm 4 7 within rotor 5 mm and 17 0 7 shifted crankshaft.
Mazda rotary engines have a reputation for being relatively small and powerful at the expense of poor energy efficiency engines have become popular with car kit builders, racers and light aircraft coffee because of their light weight, compact size, resulting potential adjustment and high inherent power -to weight ratio - as is true for all type of engines Wankel engine Mazda has put into serial production, with NSU Ro 80 and Citroën GS Birotor, as part of the joint venture increased locomotor between 1967 and 1977.
Since the end of production of the Mazda RX-8 in 2012, the engine is produced only for single-seater racing citation needed with custom-make Star Mazda Championship contested with a Wankel engine.
Wankel engines can be classified according to their geometric size based on center of the rotor radius at the cutting edge distance, as the median radius of the stator and the rotor thickness depth and offset crank button, eccentricity, also April 1 the difference between the major and minor axes These metrics stator function is similar to the bore and the stroke action of a displacement piston engine is 3 3radius offset depth, multiplied by the number of rotors note that this does account one face of each rotor as displacement of the rotor assembly, and is safe because it incorrect three faces, which is equivalent to three piston faces by rotor, equivalent to a radial piston engine three cylinders rotor Almost all production engines Mazda Wankel share a single radius of the rotor, 105 mm 4 1 in, with a 15 mm 0 6 offset crankshaft the only engine to deviate from this formula strut t rare 13A, which used a 120 mm 4 7 within the rotor and 17 mm 5 0 7 in the crank offset citation needed.
The Wankel engines have become commonplace in motorsports events, which created the problem of correct representation of the displacement of each engine as provided by the manufacturer, to the benefit of competition rather than forcing the majority of participants driving motor vehicles piston half their city probably resulting shift in the confusion, most racing organizations have simply decided to double the city moving Wankel engines 1.
The key for comparing the displacement between the 4-cycle engine and the rotary motor is under consideration of the rotational degrees to a thermodynamic cycle to occur for a 4-stroke engine to complete each thermodynamic cycle, the engine must run 720 or two complete revolutions of the rotating crankshaft of the engine is different, the motor rotor rotates at 3 velocity of the crankshaft on the engine with two rotors, front and rear rotors are 180 offset from each other every rotation of the motor 360 bring two faces through the combustion cycle, the torque input to the eccentric shaft That said, you have 1080 or three complete revolutions of the crankshaft to complete the entire thermodynamic cycle obviously there is a disparity How can we get number relatable compared with a 4-stroke engine the best way is to study 720 engine rotating two rotors each 360 of rotation, both sides of the engine t erminer a combustion cycle 720 will be a total of four sides completed their 40ci 654cc cycle time facing four sides is equal to 2 or 160ci 6L This Sá many well-motivated and now gives something that can be compared to other engines Furthermore, since four faces adopted by the comparison, it is as an engine with four cylinders 13B therefore compares favorably to a 6L 2 4-cylinder 4-stroke one.
Using the same formula, calculate the actual displacement wherein 1080 is full thermodynamic cycle of a rotary motor and a total of six faces which complete their cycle, 40ci 654cc per face time six faces is equal to 3924cc, 3 9L, or 240ci, with reference to a rotary engine Mazda 13B Each face has a displacement of 654cc 40ci and there are a total of six faces with this known, the engine displacement must be 40ci times of six to 654cc equal 240ci 3 9L 1.
Wankel first prototype was a 40A single-rotor Mazda engine very similar to the NSU KKM400 Although never produced in volume 40A is a valuable test bed for Mazda engineers, and quickly demonstrated two serious challenges citation necessary feasibility brand design chatter in the housing, and heavy oil consumption the chatter marks, nails nicknamed the devil citation needed were caused by the tip attached vibrating at its natural frequency of the problem the consumption of oil was treated with gaskets, heat-resistant rubber on the sides of this first motor rotors have a rotor radius of 90 mm3 5, in an offset of 14 mm 0 6, and depth of 59 mm 2 in 3.
The first Mazda Cosmo prototype used a 798 cc L8A two Wankel rotors The engine and car were both presented at the summit joints cast Tokyo Motor Show 1963 Hollow reduces vibration by changing their resonance frequency and therefore chatter He was removed marks dry sump lubrication radius of the rotor was 98 mm3 40A to 9 but the depth is decreased to 56 mm 2 2 in.
One, three, four and derivatives of the rotor L8A have also been created for experimentation necessary quote.
Series 10A appeared first in 1965 Wankel production Mazda, it was a design to two rotors, each displacement chamber of 491 cc so that two chambers by a rotor displace 982 cc; the name of the series reflects this value suggesting 10 1 0 These liter engine showed the dimensions of the rotor with a consumer 60 mm 2 4 depth.
The rotor housing is made of cast aluminum plated with chromium sand, while the aluminum sides were sprayed with molten carbon steel for strength cast iron was used for the rotors themselves, and their eccentric shafts are citation steel expensive chromium-molybdenum necessary the addition of carbon seals top aluminum addressed the problem of chatter mark.
The first motor 10A was the 0810 used in the I Cosmo series from May 1965 to July 1968 These cars and their revolutionary engine, were often called L10A models Gross output was 110 hp 82 kilowatts at 7000 rpm and 130 Nm 96 lb-ft at 3,500 rpm, but both figures were probably optimistic rotational speed of the crankshaft.
10A selected double side intake ports per rotor, each powered by one of four carburetor barrels One port rotor was used under a light load for fuel economy added a single device exhaust port hot gas fed through the coolest parts of the housing, and the engine coolant flowing axially rather than radial flow used by NSU some oil was mixed with the intake charge for lubrication.
0810 has been changed to the Cosmos race used in Nürburgring These motors had both and secondary devices located inlets switched with a butterfly valve to low usage and high speed, respectively.
The improved version of the 0813 engine appeared in July 1968 in the Series II Cosmo L10B Its construction was very similar to 0810.
Japanese-test gross output was 100 hp 75 kilowatts at 7000 rpm and 133 Nm 98 lb-ft at 3500 rpm The use of less expensive components has raised the engine weight from 102 kg to 122 kg 224 lb 268 lbs
The last family member 10A was the 1971 0866 This version featured a thermal reactor cast to reduce exhaust emissions and re-tuned exhaust ports The new approach to reducing emissions was partly due to legislation controlling emissions from the Japanese government in 1968, with implementation starting in 1975 Mazda call their technology HARVEST Otary R E P ollution ngine has nti S ystem the diecast rotor housing is now coated with a new the new process TCP featuring sprayed on steel transplant treatment process, which is then coated with crude chromium production was 105 hp 78 kilowatts at 7000 rpm and 135 Nm 5 99 lb-ft at 3500 rpm .
Mazda started development on one engine rotor 360cc displacement, and is designed to kei car use in the Mazda Sing, but was never put into production a prototype engine is exposed to the Mazda Museum in Hiroshima, Japan 2.
3A rotary engine, originally scheduled for Sing.
13A was designed for traction applications before citation needed upon a design to two rotors, each displacement chamber of 655 cc so that two chambers by a rotor displace 1310 cc; continue past practice, the name of the series reflects this value 13 suggesting March 1 liter This was the only production Mazda Wankel with different radius of rotor size is 120 mm 4 7 and the offset is 17 5 mm 0 7 but depth remains the same as the 10A 60 mm 2 4 into another major difference compared to previous engines was the cooled oil cooler integrated by water.
13A was used in the 1969 1972 R130 Luce where she produced 126 hp 94 kW 172 Nm 126 lb.-ft. That was the end of the line for this engine design next Luce pull back and Mazda never made a wheel before a rotary drive vehicle.
Figure 12A is an elongated version of the 10A the radius of the rotor is the same, but the depth was increased from 10 mm 0 4 to 70 mm 2 8 It is continued to design two rotors; with increasing depth each displaced 573 cc chamber so that two chambers by a rotor displace 1146 cc; the name of the series continues past practice and reflects this value suggesting 12 January 2 liters 12A series was produced for 15 years, from May 1970 to 1985 In 1974, a 12A became the first engine built outside of Western Europe or the United States to complete the 24 hours of Le Mans.
In 1974, there was used a new method for curing the rotor housing the sheet insertion process SIP used a few steel sheet such as an engine cylinder liner conventional piston with a chrome surface coating The side of the housing has also amended to remove the metal sprayed annoying REST the new process created a strong housing, ancient joints carbon could be abandoned in favor of the classic cast iron.
12A first engines also feature a thermal reactor, similar to the 0866 10A, and some use an exhaust port insert to reduce the exhaust noise to a lean version was introduced in 1979 in Japan and 1980 in America substituted a more conventional catalytic converter for this afterburning a major change in the architecture 12A was 6PI which featured variable induction ports.
The ultimate motor 12A has been the engine electronic fuel injection used in Japan spec series HB Cosmo Luce 3 and SA Series RX-July 4 In 1982, a coupe Cosmo powered turbo 12A was officially the fastest car in the quotation Japan needed It featured half -direct injection in the two rotors both passive knock sensor was used to eliminate rattling and later models feature a smaller and lighter designed Turbo impact that has been set for Signature single exhaust of the Wankel engine to a 5-horsepower engine 4 continued until 1989 in the series HB Cosmo, but at this point it had become a renowned thirsty engine.
origin output is 160 PS 120 kilowatts at 6500 rpm and 226 N m 167 lb-ft at 4000 rpm 3.
Release impact Turbo 165 PS 121 kilowatts at 6000 rpm and 231 Nm 170 lb-ft at 4000 rpm.
The 12B was a short engine that was produced for the Mazda RX-2 and RX-3 It increased the reliability of the previous series, and introduces a single distributor That was the beginning of rotary motors single distribution, before, 12A and 10A were both distributors dual wankels improving 12B was quietly introduced in 1974.
The 13B is the most widely produced engine was the basis for all future Mazda Wankel engines, and has been produced for over 30 years The 13B is unrelated 13A, it is rather a stretched version of 12A, with 80 mm3 1 thick rotors, it was a design to two rotors, each displacement chamber of 654 cc so that two chambers by a rotor displace 1308 cc; the name of the series reflects this value suggesting 13 1 3 liters, such as 13 of the same displacement, but different proportions.
In the US, the 13B was available from 1974 to 1978 and was then removed sedan, but continued in 1984-1985 RX-7 GSL-SE He disappeared from the US market again in 1995, when the dernier- US spec RX-7 was sold The engine has been constantly used in Japan s 1972 Mazda RX-4 Luce from 2002 RX-7.
The 13B was designed for both high performance and low emissions in mind first vehicles using this engine used the name AP.
A tuned intake manifold has been used in a Wankel engine for the first time with the 13B-RESI RESI Rotary Engine super Injection The so-called dynamic admission Effect included an intake housing at two levels which derives a compressor effect -As of the Helmholtz resonance of the inlets opening and closing the engine RESI also presented fuel injection Bosch L-Jetronic output was greatly improved to 135 hp 101 kilowatts and 180 Nm 133 lb ft.
As 12A-SIP, the second RX-7 generation curved with a variable intake system Known DEI the engine comprises both 6PI systems and DEI and injection four-injector total output electronic fuel is 146 hp 109 kilowatts at 6500 rpm and 187 N m 138 lb-ft at 3500 rpm.
The T-13B was turbocharged in 1986, he has injected fuel injectors of the four most recent 6PI engine, but does not have the variable intake system of the same name 6PI Mazda engine and returned to the intake ports 4 design similar to what was used in the 74 -78 86- 88 13B in dual turbocharger engine is fed with a mechanically operated two-stage valve, but on 89- 91 engines a better design of the turbo was used with a divided manifold supplying the twin scroll configuration for engines manufactured between 86- 88 output is rated at 185 hp 138 kW at 6500 rpm and 248 m N 183 lb-ft at 3,500 rpm.
The RE-13B Series JC Cosmo was a similar engine to the 13B-REW but had some key differences is that is being provided larger side ports of any model later rotary engine.
Compared to the two turbochargers mounted on the 13B-REW on the FD RX-7, the sequential turbochargers received a large HT-15 primary with a small secondary turbo HT-10 550cc injector sizes PRI SEC.
About 5000 AD 13B-RE optioned Cosmos were sold making it the engine almost as hard as the source rarest big brother citation 20B-REW necessary.
A twin-turbo version of 13B, 13B-REW became famous for its high production and low weight citation needed The double were operated sequentially Hitachi HT-12 Turbos with only primary pulse providing up to 4500 rpm and the secondary coming more online later particular, it was the first sequential double turbo system volume production of the world 5 output finally reached and perhaps exceeded, the unofficial maximum citation needed Japan 280 DIN hp 206 kW for the final revision used in the series 8 Mazda RX -7.
In the Le Mans race, the first three motor rotor used in the 757 was named the 13G.
The main difference between 13G and 20B is that the 13G uses a factory device inlet used for the competition and the production vehicle 20B uses lateral inlets.
It was renamed 20B after the name Mazda convention for 767 in November 1987 as a model three-rotor, each displacement chamber 654 cc, three bedrooms one per rotor displace 1962 cc, and so the new series name 20 reflects this value suggesting 2 0 liters.
The three-rotor 20B-REW was used in the Eunos Cosmo 1990 to 1995 he was the first twin-turbo setup volume produced in the world has been offered in both ER-13B and 20B-REW as it moved 119 cc 7 1.962 cu in a set of three chambers 654 cc after only one room and used by rotor bar 10 0 7 psi; 70 kPa of the boost pressure to produce 300 hp 224 kilowatts and 407 N m 300 ft lbf.
A version of 20B known as the RENESIS 3 R20B motor rotor was built by Racing beat the AUS for the car Furai concept which was released December 27, 2007 engine was designed to run on fuel citation to E100 ethanol necessary.
The first engine four-rotor Mazda races 13J-M was used in the 1988 and 1989 13J-MM with two stages of induction pipe 767 Le Mans Group C 6 riders of this engine was replaced by the 26B.
The largest 4-rotor Mazda engine, 26B, was used in various sports car prototype built Mazda, including the 767 and 787B to replace the old 13J In 1991, the Mazda 787B is powered 26B became the first Japanese car and the first car with nothing but a reciprocating piston engine to win the 24 hours of Le Mans outright motor 26B moved 2622 cc per set of four rooms only counting a 654 cc chamber for each of the four rotors - and 26 in the series name suggesting 2 6 liters - and developed 700 hp 522 kilowatts at 9000 rpm the engine design uses peripheral inlets, the variable geometry taken continuously, and third candle additional ignition rotor.
The RENESIS also 13B-MSP Multi-Port Side engine that appeared in the production of the Mazda RX-8 2003 is an evolution of the previous 13B was designed to reduce exhaust emissions and improve fuel economy which were two of the most recurrent drawbacks of Wankel rotary engine is naturally aspirated, unlike its predecessors in the range 13B, and therefore a little less powerful than twin-turbo 13B-REW 255-280 hp Mazda RX-7.
The RENESIS design has two major changes in its first predecessors, the exhaust ports are not peripheral, but are located on the side of the housing, which eliminates overlap and allows the redesign of the area of the orifice admission This substantially more power produced through an increase in the effective compression ratio; However, Mazda engineers have discovered that when changing the exhaust port on the side of housing, a carbon buildup in the exhaust port stop operation of the motor To overcome this, Mazda engineers added a passage water jacket into the housing side Secondly, the rotors are sealed differently by the use of side seals redesigned, low height of apex seals and the addition of a second cut-off ring engineers Mazda had initially used identical summit joined the earlier design joined Mazda changed the design of apex seal to reduce friction and push the new engine closest to its limits.
These and other quotations of necessary innovative technologies allow to reach 49 Renesis increased production and fuel consumption and emissions of the RX-8 meets LEV-II citation needed The Renesis won International Engine of year and Best new engine 2003 7 and also holds the February 5 to 3 notes liter engine is designated as March 1 liter size Mazda price 8 for 2003 and 2004, where he is considered a motor 2 6 l, but only to the question of price give it actually moves 1 9 10 3 liters effect, a wankel 2-rotor with 0654 rooms of the same volume moves into an output shaft rotation to that of a motor 2 6L piston four-stroke Finally, he was 10 Best list of Ward's engines for 2004 and 2005.
The Renesis has also been adapted for use in dual-fuel, allowing it to run on gasoline or hydrogen November 12.
All rotary engine Mazda were hired because of their light weight citation needed unmodified Renesis 13B-MSP engine has a weight of 112 kg 247 lbs, including all attachments standard except the airbox, but without fluid motor as coolant, oil, etc. known to 210-235 hp.
Also known as the Renesis II made his first and only appearance in the concept car Mazda Taiki at the Tokyo Motor Show 2007, but has not been seen since it offers up to 300 horsepower, an extended run, reduced the width of the rotor housing, direct injection and lateral aluminum housings 13.
Annual sales Mazda Wankel rotary engine obsolete without RX-8 without the Autonews engines Ward data source industry.
Mazda has been fully committed to the Wankel engine as the energy crisis of the 1970s hit the company had virtually eliminated piston engines of its products in 1974, a decision that almost led to the quote of the company's collapse had need a switch to three-pin piston gasoline approach, piston-Diesel and Wankel in the 1980s relegated Wankel sports car use in the RX-7 and Cosmo, which considerably limits the volume of production, but the company had continued production ever since the mid-1960s, and was the only manufacturer of cars running Wankel when the RX-8 has been stopped production in June 2012 with 2,000 RX-8 Spirit R models made for the market JDM RHD.
Although not reflected in the graph on the right, the RX-8 is a larger volume car than previous sales of the RX-8 peaked in 2004 at 23690, but continued to decline in 2011, while less 1 000 14 were produced.
November 16, 2011, CEO Mazda Takashi Yamanouchi has announced that the company is still committed to producing the rotary engine, saying: As long as I stay involved in this business, there will be a rotary engine offers or more offers in the range 15 .
Mazda last built a car powered by a rotary engine in 2012, the RX-8, but had to drop largely to poor energy efficiency and emissions, he continued to work on the technology, however, since it is one of the signature of the company features Mazda officials have suggested that if they can get it to perform as well as a reciprocating engine, bring to power a classic sports car, too 16.
November 16, 2011, CEO Mazda Takashi Yamanouchi has announced that the company is still committed to producing the rotary engine, saying: As long as I stay involved in this business, there will be a rotary engine offers or more offers in the range 15 .
On 17 November 2016 Principal Officer of the Research and Development Mazda Kiyoshi Fujiwara told reporters at the Los Angeles auto show that the company is currently developing its first EV in 2019, and is likely to include a rotary engine but that details were still a big secret.
He said, however, that the car is likely to use a new generation rotary engine as lengthening the beach agent, similar to a BMW i3 Concept.
In 2013, Mazda will display a prototype car Mazda2 RE, using a rotary range extension system similar EV 17.
Mazda Wankel engine, Mazda, Wankel engine, this value would suggest.