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All mazda dealershipsMazdarotary enginerotary engines are essentially a single family - they all derive from the firstrotary engineexperiments in the early 1960smazda dealers,mazda dealershipsOver the years, displacement has been increased (somewhat) mazda dealerships , and turbocharging has been added to great effectmazda dealers,mazda dealershipsThis is the engine family that made Mazdafamousmazda dealers,mazda dealerships
In auto racingand for Japanese tax purposes, the displacement of rotarymazda dealerships engine engines is defined as the equivalent of 1.5 times the nominal displacementmazda dealers,mazda dealershipsSo the 1.3 L 13B engines count as just under 2.0 L for these purposes mazda dealers,mazda dealerships
rotary enginemazda dealerships engines can be classified by their rotor size in terms of width (diameter) and depth (thickness)mazda dealers,mazda dealershipsThese metrics function similarly to the bore and stroke measurements of a piston engine mazda dealers,mazda dealerships
mazda dealerships Nearly allMazdaproductionrotary engineengines share a single rotor diameter: 105 mm (4.1 in) with a 15 mm (0.6 in) crankshaft offsetmazda dealers,mazda dealershipsThe only engine to diverge from this formula mazda dealerships was the rare 13A, which used a 120 mm (4.7 in) diameter and 17.5 mm (0.7 in) offsetmazda dealers,mazda dealerships
40A
Mazda's first prototyperotary enginewas the 40A, a single-rotor enginemazda dealerships very much like the NSU KKM400mazda dealers,mazda dealershipsAlthough never produced in volume, the 40A was a valuable testbed for Mazdaengineers, and quickly demonstrated two serious challenges to the feasibility of the design:mazda dealerships chatter marks in the housing and heavy oil consumptionmazda dealers,mazda dealershipsThe chatter marks, nicknamed devil's fingernails, were caused by improper sealing at the apex of the rotor mazda dealers,mazda dealershipsThe oil consumption problem was mazda dealerships addressed with heat-resistant rubber oil seals at the sides of the rotorsmazda dealers,mazda dealershipsThis early engine had a rotor diameter of 90 mm (3.5 in) , an offset of 14 mm (0.6 in) mazda dealerships , and a depth of 59 mm (2.3 in)mazda dealers,mazda dealerships
L8A The very first MazdaCosmo prototype used a 798 cc L8A two-rotorrotary enginemazda dealers,mazda dealershipsThe engine and car mazda dealerships were both shown at the 1963 Tokyo Motor Showmazda dealers,mazda dealershipsHollow cast iron apex seals reduced vibration and thus chatter marks mazda dealers,mazda dealershipsIt used dry-sump lubrication mazda dealers,mazda dealershipsRotor diameter was up from the mazda dealerships 40A to 98 mm (3.9 in) , but depth dropped to 56 mm (2.2 in)mazda dealers,mazda dealerships
One-, three-, and four-rotor derivatives of the L8A were also created for experimentation mazda dealers,mazda dealerships
mazda dealerships 10AThe 10A series was Mazda's first productionrotary engine, appearing in 1965mazda dealers,mazda dealershipsIt was a two-rotor design, with each displacing 491 cc for a total of 982 cc mazda dealers,mazda dealershipsThese mazda dealerships engine featured the mainstream rotor dimensions with a 60 mm (2.4 in) depthmazda dealers,mazda dealerships
The rotor housing was made of sand-cast aluminum plated with chrome, while the aluminum sides were sprayed with mazda dealerships molten carbon steel for strengthmazda dealers,mazda dealershipsCast iron was used for the rotors themselves, and their eccentric shafts were of expensive chrome-molybdenum steel mazda dealers,mazda dealershipsThe addition of aluminum/carbon apex seals addressed the chatter mazda dealerships mark problemmazda dealers,mazda dealerships
0810 The first 10A engine was the 0810, used in the Series I Cosmo from May, 1965 through July, 1968 mazda dealers,mazda dealershipsThese cars, and their revolutionary engine, weremazda dealerships often called L10A modelsmazda dealers,mazda dealershipsGross output was 110 hp (82 kW) at 7000 RPM and 130 Nm (96 ft.lbf) at 3500 RPM, but both numbers were probably optimistic mazda dealers,mazda dealerships
The 10A mazda dealerships featured twin side intake ports per rotor, each fed by a one of four carburetor barrelsmazda dealers,mazda dealershipsOnly one port per rotor was used under low loads for added fuel economy mazda dealers,mazda dealershipsA mazda dealerships single peripheral exhaust port routed hot gas through the coolest parts of the housing, and engine coolant flowed axially rather than the radial flow used by NSUmazda dealers,mazda dealershipsA bit of oil was mazda dealerships mixed with the intake charge for lubricationmazda dealers,mazda dealerships
The 0810 was modified for the racing Cosmos used at Nürburgring mazda dealers,mazda dealershipsThese engines had both side- and peripheral-located intake ports switched with a mazda dealerships butterfly valve for low- and high-RPM use (respectively)mazda dealers,mazda dealershipsBy: Jon beal |
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