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The Renesis engine – also 13B-MSP (Multi-Side Port) – which first appeared in production in the 2004 model-year Mazda RX-8, is an evolution of the previous 13B. It was designed to reduce exhaust emission and improve fuel economy , which were two of the most recurrent drawbacks of Wankel rotary 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]
After Mazda RX-8 production ceased in 2013, Mazda has carried on with testing prototypes to re-introduce the rotary as part of the "SkyActiv" lineup, dubbed SkyActiv R, displacing 1600 cc and featuring direct injection, laser ignition and forced induction. Wankel family – 1.0 L-2.0 L Wankel (1967–present) 10A – 1.0 L (1967–1973)
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.
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.
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 did not receive the full suite of improvements in August 1988 that the B, 3B and 11B received. At this time, the 13B received an 8 bolt flywheel and larger camshaft, but retained cylinder liners and pushrod inspection galleries. All versions of the 13B/13B-T came with in-line injection pumps. Production of the 13B/13B-T ended in 1989.
As a result of GM's toying with the Wankel rotary engine, as used by Mazda of Japan, an export agreement was initiated in 1975. This involved Holden exporting with powertrains, HJ, and later, HX series Premiers as the Mazda Roadpacer AP. Mazda then fitted these cars with the 13B rotary engine and three-speed automatic transmission. Production ...