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The main difference between the 13G and 20B is that the 13G uses a factory peripheral intake port (used for racing) and the 20B (production vehicle) uses side intake ports. It was renamed 20B after Mazda's naming convention for the 767 in November 1987. As a three-rotor design, with each chamber displacing 654 cc (39.9 cu in), three chambers ...
The inner shaft is a moving part with an eccentric lobe for the inner rotor to spin around. The rotor spins around its center and around the axis of the eccentric shaft in a hula hoop fashion, resulting in the rotor making one complete revolution for every three revolutions of the eccentric shaft.
The Midwest twin-rotor wankel engine has an eccentric shaft that spins up to 7,800 rpm, so a 2.96:1 reduction gear is used. Aero-engine reduction gears are typically of the gear type, but smaller two-stroke engines such as the Rotax 582 use belt drive with toothed belts, which is a cheap and lightweight option with built-in damping of power surges.
The eccentric shaft's main bearings and the inlet manifolds were fed by oil-injection lubrication, and the fuel-air mix also carried residual mist of oil from the interior of the rotors, which helped to lubricate the rotor tips. [7] DKW Hercules with the F&S engine that was developed by Garside to become the Norton motor
ARV Super2 with AE110. Very closely based upon the Norton engine, the MidWest engine developed the design further. The lubrication system became a semi-total-loss system whereby Silkolene 2-stroke oil was directly injected into the inlet tracts and onto the main roller bearings, but the oil that fed the bearings became an oil-mist within the rotor-cooling air, with about 30% [4] of the oil ...
Eccentric bottom bracket on a Burley tandem bicycle held in place with two set screws. The term is also used to refer to the device often used on tandem bicycles with timing chains, single-speed bicycles with a rear disc brake or an internal-geared hub, or any bicycle with vertical dropouts and no derailleur, to allow slight repositioning, fore and aft, of a bottom bracket to properly tension ...
This difference becomes significant in high-speed engines, which may need balance shafts to reduce the vibration due to this "secondary imbalance". The mechanical advantage of a crank, the ratio between the force on the connecting rod and the torque on the shaft, varies throughout the crank's cycle. The relationship between the two is ...
The eccentric shaft is a single piece and has no hirth joints. [12] It is forged of heat-treated and specially induction-hardened CK 45 steel with a UTS of 800–900 MPa. [13] In the three-rotor version, the eccentrics have a 120° spacing, and in the four-rotor version, a 90° spacing.