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Mazda rotary engines have a reputation for being relatively small and powerful at the expense of poor fuel efficiency. The engines became popular with kit car builders, hot rodders and in light aircraft because of their light weight, compact size, tuning potential and inherently high power-to-weight ratio—as is true for all Wankel-type engines.
Thus the Wankel is a 2:3 type of rotary engine, i.e., its housing's inner side resembles a two lobes oval-like epitrochoid (equivalent to a peritrochoid),. [25] In contrast, its rotary piston has a three vertices trochoid shape (similar to a Reuleaux triangle). Thus, the Wankel engine's rotor constantly forms three moving working chambers. [26]
It featured a 12A carbureted rotary engine as well as the option for a 13B rotary engine with electronic fuel injection in later years. The second-generation RX-7, sometimes referred to as the FC, was offered as a two-seater coupé with a 2+2 option available in some markets, as well as in a convertible body style.
Premiers were shipped to Japan without engines or transmissions, and Mazda fitted a 1.3-liter 13B Wankel engine into the bay. It was the first large Japanese car to meet the 1975 emissions standards, although that was a short-lived distinction because the Nissan President followed suit a month later.
The Rotary Engine Pick-up (REPU) was the world's first and only Wankel-engined pickup truck. [10] It was sold from 1974 to 1977 and was only available in the North American Market. [ 10 ] [ 11 ] The Rotary-Engined Pickup (REPU) had a four-port 1.3-liter 13B four-barrel carbureted engine, [ 12 ] flared fenders, a battery mounted under the bed, a ...
The 13B-T is a turbocharged version of the 13B engine, with a compression ratio of 17.6:1. Output is 120 hp (89 kW) at 3,400 rpm with 159 ft·lb f (217 N·m) of torque at 2,200 rpm. The later "LASRE" version has 130 PS (96 kW) at 3,400 rpm and 30.0 kg⋅m (294 N⋅m; 217 lb⋅ft) at 2,000 rpm.
It also has a long history of motorsport involvement, winning the 24 Hours of Le Mans in 1991 with the rotary-powered Mazda 787B. [10] In the past and present, Mazda has been engaged in alliances with other automakers. From 1974 until the late 2000s, Ford was a major shareholder of Mazda. Other partnerships include Toyota, Nissan, Isuzu, Suzuki ...
The first radial-configuration engine known to use a twin-row design was the 160 hp Gnôme "Double Lambda" rotary engine of 1912, designed as a 14-cylinder twin-row version of the firm's 80 hp Lambda single-row seven-cylinder rotary, however reliability and cooling problems limited its success.