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They require elaborate lubrication, and in older designs have been a weak point for the engine's durability. The LiquidPiston design reverses the shapes: a figure-eight-shaped rotor moves within a triangular housing. The required seals (both face and apex) are mounted on the stationary housing, which makes lubrication much easier.
The Mazda RX-8 Renesis engine improved performance by doubling the exhaust port area relative to earlier designs, and there have been studies of the effect of intake and exhaust piping configuration on the performance of Wankel engines. [77] Side intake ports (as used in Mazda's Renesis engine) were first proposed by Hanns-Dieter Paschke in the ...
The only engine to diverge from this formula was the rare 13A, which used a 120 mm (4.7 in) rotor radius and 17.5 mm (0.69 in) crankshaft offset. As Wankel engines became commonplace in motorsport, the problem of correctly representing their displacement for the purposes of competition arose. Rather than force participants who drove vehicles ...
The Ace was an American-assembled car made in Ypsilanti, Michigan by the Apex Motor Car Company, which was reorganized as the Apex Motor Corporation in 1921. The initial batch of cars assembled was sent to Seattle, Washington dealer F. E. Earnest, who had the idea for the Ace after he was unable to secure a steady supply of new cars for his dealership.
The 4A-GE engines used in the AE86 and AW11 were also equipped with Denso electronic port fuel injection and T-VIS variable intake geometry. In North America, a modified 4A-GEC engine was used to comply with California emissions regulations. Power was rated at 112 hp (114 PS; 84 kW) and 100 lb⋅ft (136 N⋅m) of torque. [19]
Nikasil or similar coatings under other trademarks are also still widely used in racing engines, including those used in Formula One and ChampCar. Suzuki uses a nickel phosphorus-silicon-carbide proprietary coating trademarked SCEM (Suzuki Composite Electro-chemical Material) to maximize cylinder size and improve heat dissipation in the TU250X ...
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