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240 Landmarks of Japanese Automotive Technology
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240 Landmarks TopGasoline and Natural Gas Engine > 4G93 (cylinder gasoline direct injection engine: GDI)
 4G93 (cylinder gasoline direct injection engine: GDI)
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This was the world's first mass-produced direct injection gasoline engine. It used unique elemental technologies including a vertical intake port, curved top face piston, high pressure injection pump, and high pressure swirl injector. It realized both low fuel consumption and high output by automatically switching between two combustion modes (low fuel consumption mode and high output mode) in accordance with the driving situation as shown below.
Compared with Mitsubishi's vehicles mounted with conventional engines, it improved output in all ranges by approx. 10% and fuel consumption by approx. 35%.
Combustion mode
Low fuel consumption mode: A compact spherical fuel spray was injected at the end of the compression stroke. Stratified mixture enabled stable super lean burn.
High output mode: Fuel was injected conically in the intake stroke. Homogeneous mixture enabled high response and high power.
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Storage location:MITSUBISHI MOTORS CORPORATION, PASSENGER CAR TECHNICAL CENTER, PLANNING ADMINISTRATION CENTER (1, Nakashinkiri, Hashime-cho, Okazaki-shi, Aichi-ken 444-8501)
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Year manufactured:1996
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Manufacturer:Mitsubishi Motors Corporation
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Classification:Replica
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Current status:On display (static): open to the public
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Model / Manufacture
Model:4G93
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Type:Gasoline
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Company name:Mitsubishi Motors Corporation
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Location:Okazaki Auto Gallery
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Installation model:Mitsubishi Galant, etc.
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Year of manufacture:1996
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Specification
Cylinder arrangement, number of cylinders:Inline 4-cylinder
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Cycle / cooling method:4/water-cooled
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Valve type / number:DOHC/4-valve
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Combustion method:Direct injection
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Combustion chamber:Pent roof type (curved top face piston)
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Total displacement:1834 cc
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Bore x stroke:81.0×89.0 mm
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Compression ratio:12
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Mass (weight):145 kg
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Ignition system:Full transistor type
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Performance
Max. output:N150 ps/6500 rpm
N: Net
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Max. torque:18.2 kg・m/5500 rpm
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Rate of fuel consumption:195 g/psh (2500 rpm)
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Exhaust emissions measures:Exhaust emission control system: Selective reduction lean Nox catalyst (with three-way catalyst function), EGR
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Device
Intake system:Vertical type intake port
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Points of interest, topicality:The world's first gasoline direct injection engine
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Features:This was an eco-friendly engine that improved output and fuel consumption by adopting unique elemental technologies including a vertical type intake port, curved top face piston, and high pressure injection pump.
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Reference materials:Mitsubishi Motors Technical Review, 1997, No. 9
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240 Landmarks TopGasoline and Natural Gas Engine > 4G93 (cylinder gasoline direct injection engine: GDI) page top
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