Mazda HR-X

The Mazda HR-X was the first hydrogen powered concept car produced by Mazda. The car was unveiled at the Tokyo Motor Show in 1991. It was the first in a series of demonstration hydrogen internal combustion engine vehicles produced by Mazda.

Mazda HR-X
Mazda HR-X in Otaru museum
Overview
ManufacturerMazda
Model years1991
AssemblyAki District, Hiroshima
Body and chassis
DoorsGullwing
Powertrain
Engine2 rotor Mazda Wankel engine
Transmission4-speed automatic
Range190 km (120 mi)
Dimensions
Length3,850 mm (151.6 in)
Width1,700 mm (66.9 in)
Height1,450 mm (57.1 in)
Curb weight1,260 kg (2,778 lb)
Chronology
PredecessorNone
SuccessorMazda HR-X 2

Design

The Mazda HR-X was a small concept car developed by Mazda to showcase the use of hydrogen fuel as a possible environmentally friendly alternative for automotive transport.[1] The car was powered by a two rotor Wankel engine that produced 100 hp (75 kW). 37 Nm3 (3.32 kilograms (7.3 lb)) of hydrogen was stored in a metal hydride tank that was refueled by a single nozzle alongside water for cooling.[2] The engine was connected to the wheels via a 4 speed automatic transmission, while a KERS-like system called Active Torque Control System (ACTS) was used to recover braking energy and reuse it to improve acceleration.[3]

The cabin accommodated two people who entered via gull-wing doors. It was constructed of plastic and designed to be nearly completely recyclable.

Performance

The car was capable of a top speed of 130 km/h (81 mph) and had a range of 190 km (120 mi).[4]

gollark: I'm considering somehow coordinating it with the *other* reactor which burns TBU oxide.
gollark: Otherwise it turns off.
gollark: Basically, the top one transmits the powercell's fullness level (obtained via a computercraft thing since comparators appear to not work) and the bottom one receives that, reads the reactor's buffer level (it was meant to be heat but somehow I just get the RF output buffer level), and if the powercell is below full and the buffer empty it turns the reactor on.
gollark: Some screenshots of the controllers.
gollark: TIS-100 is a weird massively-parallel architecture of nodes running simple assembly programs communicating with each other.

See also

References
  1. Cranswick, Marc (2016). Mazda Rotary-engined Cars: From Cosmo 110S to RX-8. Dorchester: Veloce Publishing. p. 144. ISBN 9781845849436.
  2. "Mazda Advances Environmentally-Correct HR-X: Powered by Hydrogen" (PDF). Hydrogen Today. 4 (1): 3–4. 1993.
  3. Brown, Stuart F. (1993). "Running on Hydrogen". Popular Science. 240 (2): 53.
  4. Hoffman, Peter (2012). Tomorrow's Energy: Hydrogen, Fuel Cells, and the Prospects for a Cleaner Planet. Cambridge MA: MIT Press. p. 129. ISBN 9780262516952.

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