Mitsubishi ME21/24 engine

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ME21/24

Mitsubishi ME24 engine.jpg

ME24D engine in a Mitsubishi 360 (LT25)
Overview
Manufacturer Mitsubishi Motors
Also called "Yellow" engine
Production 1961–72
Layout
Configuration air-cooled two-stroke I2
Displacement 359 cc
Cylinder bore 62.0 mm
Piston stroke 59.6 mm
Chronology
Predecessor ME20 engines.
Successor Mitsubishi 2G1 engine

The ME21/24 engine was Shin Mitsubishi Heavy-Industries' (one of the three divisions of Mitsubishi Heavy Industries until their consolidation in 1964) replacement for the 309 cc single-cylinder overhead valve ME20 engine. Unlike its predecessor, this was a two-stroke, a concept to which Mitsubishi was to prove faithful for its smallest engines until the 1972 introduction of the Vulcan 2G21. [1]

Mitsubishi Heavy Industries Japanese multinational engineering, electrical equipment, and electronics company

Mitsubishi Heavy Industries, Ltd. is a Japanese multinational engineering, electrical equipment and electronics company headquartered in Tokyo, Japan. MHI is one of the core companies of the Mitsubishi Group.

Mitsubishi Vulcan engine Car engine

The Mitsubishi Vulcan engine, identified by the code 2G2, is an iron-block twin cylinder engine with three main bearings, built by Mitsubishi Motors for kei car class vehicles from September 1972. It was an overhead camshaft design, and superseded the older two-stroke 2G1 series. The 2G2 was in turn replaced by the Multi-valve 3G8 three-cylinder series.

Contents

General

The naming of Mitsubishi engines after the dissolution of the Zaibatsu reflected which factory they were built in. M stood for the Mizushima plant, E for engine, and 21 for being the 21st engine development by Mizushima, thus "ME21". When the 2G10 engine (a water-cooled version of the ME24) was introduced in late 1968, Mitsubishi's new unified naming convention had taken effect and thus its very different name.

The Mitsubishi 2G1 engine is a water-cooled iron-block two-stroke twin-cylinder engine built by Mitsubishi Motors for the kei car class from 1968. They were first introduced in the first generation Minica to replace the otherwise similar but air-cooled ME24 powerplant. The difference of nomenclature compared to the ME24 is due to Mitsubishi's 1967 change of engine naming practice, 2G1 meaning it was in the first family of two-cylinder gasoline-powered engines. The "0" in "2G10" means that it was the first displacement version produced, with numbers after a dash then denoting the various subiterations.

The ME21 was first used in the Mitsubishi 360 light commercial of April 1961, and then in the Minica passenger car. The later ME24 engines were seen in a variety of Mitsubishi's lower end Kei cars and trucks, until production ended in late 1972. Due to ever tighter anti-pollution legislation as well as a more demanding customer base, the air-cooled ME24 eventually made way for more modern engines. When installed in the A100/100V Minicas, the ME24 was referred to as the "Yellow" engine.

Kei car car model

Kei car is the Japanese vehicle category for the smallest highway-legal passenger cars. Similar Japanese categories existing for microvans, and Kei trucks.

ME21

The 359 cc twin cylinder two-stroke ME21/ME21A was used in the 360 pickup truck and the first generation Minica LA20. Power was only 17 horsepower (13 kW).

Two-stroke engine internal combustion engine

A two-strokeengine is a type of internal combustion engine which completes a power cycle with two strokes of the piston during only one crankshaft revolution. This is in contrast to a "four-stroke engine", which requires four strokes of the piston to complete a power cycle during two crankshaft revolutions. In a two-stroke engine, the end of the combustion stroke and the beginning of the compression stroke happen simultaneously, with the intake and exhaust functions occurring at the same time.

Pickup truck light-duty truck with an enclosed cab and an open cargo area

A pickup truck is a light-duty truck having an enclosed cab and an open cargo area with low sides and tailgate. Once a work tool with few creature comforts, in the 1950s, consumers began purchasing pickups for lifestyle reasons, and by the 1990s, less than 15% of owners reported use in work as the pickup truck's primary purpose. Today in North America, the pickup is mostly used like a passenger car and accounts for about 18% of total vehicles sold in the United States.

ME24

A lightly modified ME21 introduced in November 1964, featuring an "Auto Mix" system which made away with the need for pre-mixed gasoline/oil. It also gained one extra horsepower. In May 1967 the 21 hp reed valve ME24D was introduced. Later iterations of the ME24 were used in the base models of the second generation Minica and Minicab until replaced by a detuned version of the "Red" 2G10 engine in late 1972. The ME24E actually soldiered on in the LT30V van version of the first generation until 1976, as this was not updated alongside its truck siblings. Along with assorted other Mitsubishi parts, a 21 PS (15 kW) ME24 engine was also used by Hope Motor Company for their tiny ON360 off-roader, the predecessor to the Suzuki Jimny.

Mitsubishi Minicab car model

The Mitsubishi Minicab is a cabover kei truck and microvan built and sold in Japan by the Japanese automaker Mitsubishi Motors since 1966. In Japan, it was sold at a specific retail chain called Galant Shop. An all-electric model of the Minicab, called the Minicab MiEV, is sold in the Japanese market since December 2011. It was also sold by China Motor Corporation (CMC) in Taiwan as the CMC Verica, starting in 1985. Since February 2014, the Mitsubishi Minicab is a rebadged Suzuki Carry and Every.

Hope Motor Company defunct Japanese car company

Hope Motor Company was a Japanese car company bought by Suzuki in 1968. In December 1967, they released the HopeStar ON360, which in Japanese is called sanrin (三輪)" or "three wheels", with a Mitsubishi 360-cc two-stroke, straight-two ME24 engine producing 21 bhp. The ON360 had a four-wheel drive layout. While 100 engines were purchased from Mitsubishi, most sources state that only 15 ONs were finished, all in 1968.

Suzuki Jimny car model

The Suzuki Jimny is a line of four-wheel drive off-road mini SUVs, made by Japanese automaker Suzuki since 1970. Originated as a car in the Japanese Kei car tax and legal class – a Kei car version is still made for the Japanese market today, as well as versions that exceed that class's legal limits, in Japan called the Jimny Sierra. The latter are also successfully sold in worldwide markets. Suzuki has sold 2.85 million of them in 194 countries from launch in April 1970 through September 2018.

Specifications

・ME21/21A [2] ME24 [3] ME24D [4] ME24E [5] ME24F [6]
Engine type two-stroke I2 reed valve two-stroke I2
Displacement 359 cc
Bore x stroke 62.0 x 59.6 mm
Fuel type Pre-mix "Auto Mix" oil and gasoline
Peak power17 PS (13 kW)18 PS (13 kW)21 PS (15 kW)26 PS (19 kW)30 PS (22 kW)
at rpm 4800 rpm 5500 rpm 6000 rpm
Peak torque27.5 N⋅m (20 lb⋅ft)30.4 N⋅m (22 lb⋅ft)31.4 N⋅m (23 lb⋅ft)35.3 N⋅m (26 lb⋅ft)36.3 N⋅m (27 lb⋅ft)
at rpm 3500 rpm 3000 rpm 3500 rpm 4500 rpm 5000 rpm
Compression 8.2:1 7.8:1 8.0:1
Applications 61.04-64.11 Mitsubishi 360, 62.10-64.11 Mitsubishi Minica 64.11-67.05 Mitsubishi 360/Minica 66.08-71.05 Mitsubishi Minicab, 67.05-69.07 360/Minica, 68.04-? HopeStar ON360 69.07-70.10 Minica A100, 69.07-72.10 Minica Van A100V, ?? Minica Pick, ??-76.03 Mitsubishi Minicab LT30 70.10-72.10 Minica A100, 71.05-72.09 Minicab EL, 72.10-?? Mitsubishi Minicab EL Van Super Deluxe LT30

Applications

See also

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References

  1. ↑ Light Commercial Truck 1950-1975, p. 84-87.
  2. ↑ Nippon Kei Car Memorial, p. 60, 60s Car Archive, p. 21.
  3. ↑ Nippon Kei Car Memorial, p. 62, Кιηοκο（三菱360 諸元）, http://www2.plala.or.jp/Kinoko/cars/LT/spec.html
  4. ↑ Nippon Kei Car Memorial, p. 66, Light Commercial, p. 86-87.
  5. ↑ Nippon Kei Car Memorial, p. 72, Light Commercial, p. 87.
  6. ↑ Nippon Kei Car Memorial, p. 81, World Cars 1972, 362-363, Light Commercial, p. 86-87.
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