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240 Landmarks TopGasoline and Natural Gas Engine > Mitsubishi MCA-JET (G11B)
 Mitsubishi MCA-JET (G11B)
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Introduction of engine
MCA-Jet engine
A third jet valve was set separately from the intake and exhaust valves and injected air or a very lean mixture. This jet air created strong swirls and promoted combustion. It was found that stable combustion could be obtained even with large exhaust gas recirculation (EGR), NOx could be reduced, and combustion improved.
The successful development of the MCA-Jet system equipped with the jet valve was first announced at the hearings for the 1978 emission gas regulations on August 5. The Mitsubishi Lancer 1200 mounted with a G11B Orion engine that used was released in April 1977. Subsequently in June, the MCA-Jet system was used for the Mitsubishi Galant with the G32B Saturn engine, and thereafter for various engines of all models from the Debonair to the Minica.
MCA-JET: Mitsubishi Clean Air-Jet Control Super Lean Combustion System
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Storage location:MITSUBISHI MOTORS CORPORATION, PASSENGER CAR TECHNICAL CENTER, PLANNING ADMINISTRATION DIV. (1, Nakashinkiri, Hashime-cho, Okazaki-shi, Aichi-ken 444-8501)
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Year manufactured:1977
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Manufacturer:Mitsubishi Motors Corporation
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Classification:Mass-production product
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Current status:Open to the public (static)
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Model / Manufacture
Model:G11B (MCA-Jet)
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Type:Gasoline
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Company name:Mitsubishi Motors Corporation
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Familiar name:Mitsubishi MCA-Jet
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Location:Okazaki Auto Gallery
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Installation model:Mitsubishi Lancer, etc.
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Year of manufacture:1977
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Specification
Cylinder arrangement, number of cylinders:Inline 4-cylinder
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Cycle / cooling method:4/
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Valve type / number:SOHC/2 valves
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Combustion method:Clean air-jet control super lean combustion system
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Combustion chamber:Hemispherical
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Total displacement:1244 cc
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Bore x stroke:69.5×82.0 mm
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Compression ratio:9
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Mass (weight):112 kg
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Ignition system:Battery ignition point type
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Performance
Max. output:70 ps/5500 rpm
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Max. torque:10.7 kg・m/3000 rpm
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Rate of fuel consumption:215 g/psh (2000 rpm)
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Device
Supercharger type:None
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Intercooler:None
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Variable device:None
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Intake system:Fabric air cleaner
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Exhaust system:With catalyst
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Points of interest, topicality:Conformed to the emission gas regulations of 1978
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Features:A valve (called the jet valve) was set in addition to the intake and exhaust valves to create strong swirls for enabling super lean burn. The engine conformed to the emission gas regulations of 1978.
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Reference materials:Hiroshi Hayashi (Manager of Japan Automobile Research Institute), "'53' Nen E Dokuji No Gijutsuryoku Wo Kesshu" in "Kokusan-sha 100 Nen No Kiseki" (Separate volume of Motor Fan), Oct. 1978, pp. 264-265
Mitsubishi Motors Technical Review Vol. 17, No. 3, May 1980
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