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Each MCA-Jet valve is quite small and may be prone to carbon build-up, causing the MCA-Jet valve(s) to stick open. If a
Mitsubishi-designed engine has low compression, the MCA-Jet valve(s) could be the cause. Each MCA-Jet valve and valve seat are a self-contained cylinder-shaped unit that screws into the cylinder head for easy replacement. Aftermarket MCA-Jet valves are available. With the advent of 4-valve-per-cylinder engines, manufacturers typically design the camshaft(s) to open one intake valve slightly before the other to create a swirling effect. This has made the MCA-Jet system obsolete. The MCA-Jet system was used in certain Mitsubishi-designed engines installed in both Mitsubishi-branded and Chrysler/Dodge/Plymouth-branded vehicles during the late 1970s to late 1980s.
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approach also used a small third valve, but sent a richer air/fuel mixture to a small pre-combustion chamber near the spark plug, to help ignite a leaner air/fuel mixture in the main combustion chamber. MCA-Jet was a simpler system that sent the same air/fuel mixture to all intake and MCA-Jet valves.
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The MCA-Jet system has a small third valve separate from the intake and exhaust valves. Separate passages in the intake manifold feed each MCA-Jet valve. Since these passages are smaller than the main intake manifold passages, the air/fuel mixture must move faster. When the faster moving air/fuel
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mixture from the MCA-Jet valve hits the slower moving air/fuel mixture from the intake valve, a strong air swirling effect occurs that promotes more complete combustion. With MCA-Jet it was found that stable combustion could be obtained even with large amounts of
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ir, a moniker used in Japan to identify vehicles built with emission control technology. The term was first introduced in Japan, with later introductions internationally. The technology first appeared in
January 1973 on the Mitsubishi
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gasoline-powered inline four cylinder engine installed in all
Mitsubishi vehicles using the 4G32 engine, and the Saturn-6
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Emission reducing technology began with the installation of a
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Mitsubishi Motors and
Diamond-Star Motors - allpar.com
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six-cylinder gasoline-powered engine installed in the
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143:- プリムスによるMCA-JET及びサイレントシャフトの広告図が見られる。
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192:Automotive technology tradenames
117:"日本の自動車技術240選 - 三菱MCA-JET(G11B)"
28:trunk lid emblem of the MCA-JET
69:positive crankcase ventilation
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85:exhaust gas recirculation
77:exhaust gas recirculation
153:Web Galant - Web Catalog
96:Stratified charge engine
73:thermo reactor air pump
20:MCA-Jet valve displayed
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62:emission regulations
58:Mitsubishi Debonair
164:北埼玉自動車商会 - 自動車関連書籍
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197:Mitsubishi Motors
182:Engine technology
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119:. Archived from
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35:MCA stands for
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176:Categories
127:2013-06-22
103:References
39:itsubishi
33:Mitsubishi
187:Engines
87:(EGR),
50:4G32A
43:lean
93:CVCC
54:6G34
89:NOx
178::
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45:A
41:C
37:M
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