『Rotary Engine』

Ford
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BMW
2006-2009 New Auto Bmw Mini Cooper Clubman Convertible 1.6L Timing Kit/kit de distribución/spannrollen kit Mini cooper clubman R55 R56 1.6L 2.0L Timing Kit/kit de distribución/spannrollen kit Timing chain kit fit bmw 3 series bmw 5 series z3 e46 e34 e36 for sale/kit de distribución/kit de distribution BMW Timing Chain Kit/kit de distribución/kit de distribution Cooper Timing chain kit/kit de distribución/kit de distribution BMW E30 Timing chain kit/kit de distribución/spannrollen kit BMW 1 Timing chain kit/kit de distribución/spannrollen kit BMW 3 Series Timing chain kit/kit de distribución/kit de distribution BMW Z4 Timing chain kit/kit de distribución/kit de distribution Mini Clubman Timing chain kit/kit de distribución/spannrollen kit
Benz
Timing Chain Kit,kit de distribución,kit de distribution Mercedes Smart Timing Chain Kit/kit de distribución/kit de distribution Mercedes Vaneo Timing Chain Kit/kit de distribución/kit de distribution E 250 Timing Chain Kit/kit de distribución/kit de distribution Mercedes OM668.940 Timing Chain Kit/kit de distribución/kit de distribution Master Timing Chain Kit/kit de distribución/kit de distribution Mercedes-benz OM640.942 Timing Chain Kit/kit de distribución/kit de distribution Mercedes Benz A Class Timing Chain Kit/kit de distribución/kit de distribution Smart Cabrio Timing Chain Kit/kit de distribución/kit de distribution Mercedes benz E200 Timing Chain Kit/kit de distribución/kit de distribution E Class Mercedes Timing Chain Kit/kit de distribución/kit de distribution Mercedes 180 Timing Chain Kit/kit de distribución/kit de distribution Mercedes Benz Parts Timing Chain Kit/kit de distribución/kit de distribution
Opel
Astra Timing Chain Kit Opel Astra G Timing Chain Kit Vauxhall Astra Timing Chain Kit Vauxhall Vivaro Timing Chain Kit Vauxhall Zafira Timing Chain Kit Opel Corsa A14NET Timing Chain Kit Opel K12B Timing Chain Kit Opel Zafira Timing Chain Kit Vauxhall Signum Timing Chain Kit Opel Omega B Timing Chain Kit Opel Zafira Timing Chain Kit
Honda
Honda S2000 Timing Chain Kit Honda Timing Chain Kit Honda Civic Timing Chain Kit Honda Civic Hybrid Timing Chain Kit Honda Fit & Fit Sport Timing Chain Kit Honda City Timing Chain Kit Accord Timing Chain Kit Honda Cars Timing Chain Kit Honda Accord Timing Chain Kit S2000 2Dr Base 2.0L Ka6Mt Timing Chain Kit Honda S2000 2.0L F20C1/C2 Timing Chain Kit
Mitusibishi
Mitsubishi Pick Up Timing Chain Kit Mitsubishi Pajero Timing Chain Kit Mitsubishi Montero Timing Chain Kit Mitsubishi Shogun Timing Chain Kit Mitsubishi Lancer Timing Chain Kit Auto Mitsubishi Timing Chain Kit Mitsubishi Mirage Timing Chain Kit
Nissan
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Toyota
Toyota Corolla Timing Chain Kit Toyota Starlet Timing Chain Kit Toyota Carina Timing Chain Kit Toyota 20R 21R Corona Timing Chain Kit Toyota Land Cruiser Timing Chain Kit Toyota Hiace Timing Chain Kit Toyota Hilux Timing Chain Kit Toyota Celica Timing Chain Kit Toyota Estima Timing Chain Kit Toyota Hilux For Sale Timing Chain Kit Toyota 1RZ Timing Chain Kit Toyota Echo Timing Chain Kit Toyota Verso Timing Chain Kit Toyota 1ZRFE Timing Chain Kit Toyota 1AZ-FE 2AZ-FETiming Chain Kit Lexus Lx450 Timing Chain Kit Toyota Matrix Timing Chain Kit Toyota Tacoma Timing Chain Kit Toyota Fj Cruiser Timing Chain Kit Toyota Highlander Timing Chain Kit Toyota Highlander For Sale Timing Chain Kit Toyota 5GR-FE Timing Chain Kit Toyota Aygo Timing Chain Kit Toyota Auris Timing Chain Kit Toyota Accessories Timing Chain Kit Toyota Vitz Timing Chain Kit Hilux Tacoma Timing Chain Kit Toyota Yaris For Sale Timing Chain Kit Toyota Lexus Timing Chain Kit 2012 Toyota Camry Timing Chain Kit Toyota Sequoia Timing Chain Kit Toyota 3UR-FE Timing Chain Kit Toyota Corolla 2008 Timing Chain Kit Toyota 1zz 1ZZ-FE/3ZZ-FE/4ZZ-FE engine timing chain kits
Suzuki
Suzuki Sx4 Timing Chain Kit Grand Vitara 2005 Timing Chain Kit Suzuki Splash Timing Chain Kit Suzuki Ignis Timing Chain Kit Suzuki Jimny Timing Chain Kit 2004 Suzuki Verona Timing Chain Kit Suzuki Timing Chain Kit Suzuki Grand Vitara For Sale Timing Chain Kit Suzuki K14B Timing Chain Kit Suzuki Grand Vitara 2012 Timing Chain Kit Suzuki Xl7 Timing Chain Kit
Mazda
Mazda Timing Chain Kit Mazda B2300 Pick-Up Timing Chain Kit Mazda 2.3L L3V ,L3X Timing Chain Kit Tribute Timing Chain Kit Tribute Hybrid Timing Chain Kit Mazda 5 Timing Chain Kit Mazda B2600 Timing Chain Kit Auto Mazda Timing Chain Kit Navajo Timing Chain Kit Mazda 4.0(244) V6 1995-2000 Timing Chain Kit Mazda 3 Timing Chain Kit 2010 Mazda 3 Timing Chain Kit Mazda6 Timing Chain Kit Mazda 2 Timing Chain Kit Mazda Cx 7 Timing Chain Kit Mazda Protege Timing Chain Kit Mazda 2.0L IVCT TURBO 2012-2015 Timing Chain Kit
Daihastu
Terios Timing chain kit Daihatsu Timing chain kit
Isuzu
Isuzu Timing Chain Kit Isuzu Impulse Timing Chain Kit Isuzu Trooper Timing Chain Kit Isuzu Hombre Timing Chain Kit Isuzu G161Z Timing Chain Kit Isuzu Ascender Timing Chain Kit
Hyundai
Elantra Timing Chain Kit Hyundai Getz Timing Chain Kit Hyundai Motors Timing Chain Kit Tiburon Timing Chain Kit Hyundai 2.0L G4Gc Timing Chain Kit Hyundai Tucson Timing Chain Kit Hyundai Santa Fe Timing Chain Kit Hyundai G4FA Timing Chain Kit Hyundai G4KD Timing Chain Kit Hyundai Timing Chain Kit Hyundai Accent Timing Chain Kit Genesis Timing Chain Kit Hyundai Sonata Timing Chain Kit Hyundai Hb20 Timing Chain Kit Hyundai IX35 Timing Chain Kit
Iveco
Iveco Diesel 3000Cc Enging Code F1Ce0481 Timing Chain Kit
Jeep
Jeep Cherokee Timing Chain Kit Jeep 4.0(242) 6 Cyl. 87-93 Timing Chain Kit Jeep Wrangler Timing Chain Kit Cherokee Jeep Timing Chain Kit Grand Cherokee Timing Chain Kit Jeep Timing Chain Kit Dakota Dodge Timing Chain Kit Ram Trucks 2002 Timing Chain Kit Jeep 4.7-J,N 2002-08 Timing Chain Kit Jeep Commander Timing Chain Kit Jeep Grand Cheroke 3.0L 3.2L 3.6L Timing Chain Kit Jeep Grand Cherokee Timing Chain Kit
Kia
Kia Timing Chain Kit Kia Picanto Timing Chain Kit Kia Motors Timing Chain Kit Kia Auto Timing Chain Kit Entourage Timing Chain Kit
Chevrolet
Chevrolet 1ZZFE Timing chain kit Chevy Timing Chain Kit Equinox Timing Chain Kit Malibu Timing Chain Kit Beretta Timing Chain Kit Chevy Malibu Timing Chain Kit Citation Timing Chain Kit C368 Cavalier Timing Chain Kit C372 Camaro Timing Chain Kit C373 Impala Timing Chain Kit Monte Carlo Timing Chain Kit C499 Chevrolet 5.0 Timing Chain Kit C506 Chevrolet 1.9L 119 4Cyl 82-85 Timing Chain Kit Corsica Timing Chain Kit Chevy Impala Timing Chain Kit Express Timing Chain Kit Heavy Duty Timing Chain Kit Chevrolet 5.7 Timing Chain Kit 73069 Chevrolet Heavy Duty Timing Chain Kit Chevrolet 6.2 Timing Chain Kit Suburban Timing Chain Kit Chevrolet Avalanche Timing Chain Kit Trailblazer Timing Chain Kit Chevrolet Blazer Timing Chain Kit Caprice Timing Chain Kit Chevy Colorado Timing Chain Kit Canyon Timing Chain Kit Chevy Equinox Timing Chain Kit Chevy Traverse Timing Chain Kit Pontiac Timing Chain Kit Monte Timing Chain Kit Chevrolet C14/C15/C16/B15/B16 Timing Chain Kit Chevrolet Z22 Yh Timing Chain Kit Spark Timing Chain Kit Corvette Timing Chain Kit
Citroen
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Audi
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Peugeot
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Renault
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Chrysler
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Volkswagen
Volkswagen Polo Timing Chain Kit/kit de distribución/kit de distribution/kit de distribución/kit de distribution BMD Timing Chain Kit/kit de distribución/spannrollen kit VW Golf Plus Timing Chain Kit/kit de distribución/spannrollen kit Volkswagen EA888 Timing Chain Kit/kit de distribución/spannrollen kit Volkswagen Passat Oil pump chain kit/kit de distribución/spannrollen kit Volkswagen Bora Timing Chain Kit/kit de distribución/kit de distribution VW Transporter For Sale Timing Chain Kit/kit de distribución/spannrollen kit VW EOS Timing Chain Kit/kit de distribución/kit de distribution Volkswagen Jetta Timing Chain Kit/kit de distribución/kit de distribution Volkswagen Passat Timing Chain Kit/kit de distribución/kit de distribution Volkswagen Phaeton Timing Chain Kit/kit de distribución/kit de distribution
Dodge
Dodge Pickup Timing Chain Kit Dodge Magnum Timing Chain Kit Dodge Intrepid Timing Chain Kit Dodge Trucks Timing Chain Kit 76155 Dodge Dakota Timing Chain Kit Dakota Timing Chain Kit 9-0393S Durango Timing Chain Kit Dodge Parts Timing Chain Kit Dynasty Timing Chain Kit Ram 1500 Timing Chain Kit Dodge Journey Timing Chain Kit ,Dodge Caliber Timing Chain Kit Dodge Caravan Timing Chain Kit Dodge 1500 Timing Chain Kit Caravan Timing Chain Kit Dodge Grand Caravan Timing Chain Kit 2013 Dodge Charger Timing Chain Kit
Fiat
Strada Timing Chain Kit Ducato Timing Chain Kit Palio Timing Chain Kit 500 Fiat Timing Chain Kit Fiat Croma Timing Chain Kit Croma Timing Chain Kit Ducato Timing Chain Kit
Acura
K24A2 Honda Parts Acura Tsx Element Timing Chain Kit 2002-2006 KA20A Honda Acura RSX Type S Timing Chain Kit for Sale 2009-2010 KA5AT KA6MT Honda Accord Timing Chain Kit
Alfa romeo
Alfa Romeo 2198CC Brera 2.2JTS 2006.1 Timing chain kit Alfa Romeo Spider (939)2.2JTS 2006.9 Balance kit Alfa Romeo Mito Timing chain kit
American motors
American Motors 2.5-U(150) 4 Cyl. 1983-1987 Timing chain kit American Motors 2.8(173) V6 1985-86 Timing chain kit
Cadillac
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『Rotary Engine』

2021-08-27

The engine is the most critical part of a car, and the most important factor that determines the performance of the car, just like the heart of a person. Most people know that we use piston reciprocating engines every day, which are divided into two-stroke engines and four-stroke engines (four-stroke engines are used as an example below), but there is another engine that is not well known to most people. It is a rotary engine, also called Wankel engine.

The engine that we often see in the form of piston reciprocating motion, that is, the piston makes a reciprocating linear motion in the cylinder, and the linear motion of the piston is converted into the rotation of the crankshaft through the crankshaft, while the rotary engine does not have this conversion process, it is through the piston The rotation in the cylinder drives the main shaft of the engine (that is, the crankshaft of an ordinary engine, because it is not curved, it is no longer called a crankshaft), so there is a big difference between the two.

A. Intake stroke: The process of piston movement from top dead center to bottom dead center is called intake stroke (crankshaft rotation angle 0~180°). In this stroke, the intake valve opens, the exhaust valve closes, and the air chamber communicates with the atmosphere. Atmospheric pressure makes the oil and gas mixture enter, and the pressure in the cylinder is about 0.075~0.09MPa at the end of the intake.
B.Compression stroke: The process of piston movement from bottom dead center to top dead center is called compression stroke (the crankshaft rotation angle is 180°~360°). In this stroke, the intake and exhaust valves are fully closed, and the oil and gas mixture pressure in the air chamber gradually increases. The pressure in the air chamber at the end of the compression stroke is about 0.6 to 1.2 MPa.
C.Power stroke: The process of piston movement from top dead center to bottom dead center is called power stroke (crankshaft rotation angle 360°~540°). In this stroke, the intake and exhaust valves are fully closed, and the spark plug jumps when the piston is at the top dead center position. The fire ignites the oil and gas mixture to make the pressure in the cylinder rise sharply (up to 3~5MPa), push the piston to move towards the crankshaft, the pressure gradually drops, and the pressure in the air chamber is about 0.3~0.5MPa at the end of the power stroke.
D.Exhaust stroke: The process of piston movement from bottom dead center to top dead center is called exhaust stroke (crankshaft rotation angle 540°~720°). In this stroke, the intake valve is closed, the exhaust valve is opened, and the piston moves upward to push the combustion. The exhaust gas is discharged from the air chamber, and the air pressure in the air chamber is about 0.105~0.115 MPa at the end of the stroke. The end of the stroke also marks the end of a working cycle of the engine.

The figure below shows the comparison of each stroke of a rotary engine and a reciprocating engine (the left side of the two air holes in the figure is the intake and the right side is the exhaust). The rotary engine is the same as the reciprocating four-stroke engine. Compression, work, and exhaust are composed of four strokes. The working cavity (BC working cavity) formed between a curved surface BC of the triangular rotor and the cylinder profile is taken as an example to illustrate the four-stroke working principle of a rotary engine.

Intake stroke: When the corner C of the triangular rotor turns to the right edge of the intake hole, the BC working chamber starts to intake air. At position a, the intake and exhaust holes are connected, and the intake and exhaust overlap. This is the smallest volume of the BC working chamber, which is equivalent to the top dead center position of the reciprocating engine. As the rotor continues to rotate, the volume of the BC working chamber gradually increases, and the combustible mixture is continuously sucked into the cylinder. When the rotor rotates 90° (the main shaft rotates 270°, the ratio of the rotor to the main shaft speed in the rotary engine is 1:3, which is determined by the meshing gears) reaches position b, the volume of the BC working chamber reaches the maximum, which is equivalent to the lower part of the reciprocating engine At the dead center position, the intake stroke ends.

Compression stroke: As the triangular rotor continues to rotate, the corner top B crosses the left edge of the inlet hole, and the compression stroke begins, the volume of the BC working chamber gradually decreases, and the pressure becomes larger and larger. When it reaches position c, the rotor rotates 180° (The main shaft rotates 540°), the BC working chamber volume reaches the minimum, which is equivalent to the top dead center position of the reciprocating engine, and the compression stroke ends.

Work stroke: At the end of the compression stroke, the spark plug flashes, the high temperature and high pressure gas pushes the triangular piston to continue to rotate, and the volume of the BC working chamber gradually increases. When the corner C reaches the right edge of the exhaust hole, at position d, the rotor rotates 270° (spindle rotation 810°), the volume of the BC working chamber reaches the maximum, which is equivalent to the bottom dead center position of the reciprocating engine, and the power stroke ends.
Exhaust stroke: when the triangle rotor angle C turns to the right side of the exhaust hole, the exhaust stroke starts, and finally the triangle rotor returns to position a, the exhaust stroke ends, the rotor rotates 360° (the main shaft rotates three times), and one work The cycle ends. At the same time, CA working cavity and AB working cavity also complete a working cycle respectively.

● Comparison of engine composition:

Rotary engine: body group, valve train, supply system, ignition system, cooling system, lubrication system, starting system

Reciprocating piston engine: body set, crank connecting rod mechanism, valve train, supply system, ignition system, cooling system, lubrication system, starting system

● The advantages and disadvantages of the two engines:

◆ Reciprocating engine:
advantage:
1. The manufacturing technology is mature. It has been born for more than 120 years. Various technologies have been continuously improved. It is the most widely used internal combustion engine in the world and has low maintenance and repair costs.
2. Reliable work, good air tightness and power transmission reliability.
3. Good fuel economy.
shortcoming:
1. Complex structure, large volume and heavy weight.
2. The reciprocating inertial force and moment of inertia caused by the reciprocating motion of the piston in the crank connecting rod mechanism cannot be completely balanced. The magnitude of this inertial force is proportional to the square of the speed, which reduces the smoothness of the engine running and restricts the development of high-speed engines.
3. As the working mode of the four-stroke reciprocating piston engine is that three of the four strokes completely rely on the flywheel inertia rotation, the power and torque output of the engine are very uneven, although modern engines use multi-cylinder and V-shaped arrangements. Reduce this shortcoming, but it is impossible to completely eliminate it.

◆ Rotary engine:
advantage:
1. Small size and light weight, easy to lower the center of gravity of the vehicle. Since the rotary engine does not have a crank connecting rod mechanism, the height of the engine is greatly reduced, and the center of gravity of the vehicle is lowered at the same time.
2. Simple structure. Compared with the reciprocating piston engine, the rotary engine reduces the crank connecting rod mechanism, which leads to a greatly simplified engine mechanism and fewer parts.
3. Uniform torque characteristics. Since one cylinder of a rotary engine has three working chambers at the same time, the torque output is more uniform than that of a reciprocating piston engine.
4. Conducive to the development of high-speed engines, because the piston rotor and main shaft speed ratio is 1:3, high piston speeds are not required to achieve high engine speeds.

shortcoming:
1. The fuel consumption is high, and the exhaust emission is difficult to meet the standard. Because each cylinder has three working chambers, each revolution of the piston rotor is equivalent to three power strokes. Compared with 3000rpm and reciprocating piston engine, the reciprocating piston engine sprays 750 times/min, and the rotary engine is equivalent to the speed of 1000rpm, but it needs 3000 times/min. It can be seen that the fuel consumption of the rotary engine is significantly higher than that of the reciprocating piston engine. At the same time, the shape of the combustion chamber of the rotary engine is not conducive to the full combustion of the combustible mixture, the flame propagation path is long, and the fuel oil consumption is large. At the same time, the pollutant content in the exhaust gas is higher.
2. Due to the structure of the engine, only the ignition type can be used instead of the compression ignition type, that is, only gasoline can be used as fuel instead of diesel.
3. Because the rotary engine uses an eccentric shaft, the engine vibrates greatly.
4. The high position of the power output shaft (spindle) is not conducive to the layout of the whole vehicle.
5. The processing and manufacturing technology of the rotary engine is high, and the cost is relatively high.

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