Cylinder Head

Why aren't injectors placed in the cylinder head in petrol engines?

They use injectors in the cylinder head in diesel engines , why not in petrol engines.

This is often referred to as direct injection.
It can be used to reduce emissions and provide an ultra lean burn engine for better efficiency.
The 1955 Mercedes-Benz 300SL was the first sports car to use direct fuel injection. Many WW ll aircraft used direct injection. Since then, several automobile manufacturers have introduced direct injected gasoline engines.
The down side seems to be cost - both the cost of research and development along with the required high pressure pump and computerized injection timing.
The three way catalytic converters, for instance, are a much more cost effective way to meet present emission standards.
However, given the significant advantages of direct injection and the technological gains in computerized engine controls, I suspect we will be seeing a lot more direct injected engines in the near future.

271866S OEM Briggs  Stratton Cylinder Head Gasket 250412 256417 256422 256427
271866S OEM Briggs Stratton Cylinder Head Gasket 250412 256417 256422 256427
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Genuine Kohler 45 041 17 GASKET CYLINDER HEAD
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$15.99
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Genuine Kohler 24 841 02 CYLINDER HEAD GASKET KIT
Genuine Kohler 24 841 02 CYLINDER HEAD GASKET KIT
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Genuine Kohler 20 318 14 KIT CYLINDER HEAD
Genuine Kohler 20 318 14 KIT CYLINDER HEAD
$133.75
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Genuine Kohler 24 841 04 KIT CYLINDER HEAD GASKETS
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Genuine Kohler 32 841 02 CYLINDER HEAD GASKET KIT
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Genuine Kohler 24 318 143 KIT CYLINDER HEAD
Genuine Kohler 24 318 143 KIT CYLINDER HEAD
$139.85
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Genuine Kohler 24 318 144 KIT CYLINDER HEAD
Genuine Kohler 24 318 144 KIT CYLINDER HEAD
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Genuine Kohler 24 318 119 KIT CYLINDER HEAD 2
Genuine Kohler 24 318 119 KIT CYLINDER HEAD 2
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Genuine Kohler 24 318 150 KIT CYLINDER HEAD
Genuine Kohler 24 318 150 KIT CYLINDER HEAD
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271867S OEM Briggs  Stratton Cylinder Head Gasket 271867 270984 422432 422435
271867S OEM Briggs Stratton Cylinder Head Gasket 271867 270984 422432 422435
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Briggs  Stratton 93776 Cylinder Head Stud 691690
Briggs Stratton 93776 Cylinder Head Stud 691690
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Honda Cylinder Head Gasket GX390 13hp Engines Replacement
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36719 cylinder head gasket tecumseh Craftsman Sears
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Ariens lawn tractor Kohler CYLINDER HEAD 20 318 11 S 20 318 14 S SV590 0218
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273280S OEM Briggs  Stratton Cylinder Head Gasket 273280 272614 210702 215707
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BRIGGS AND STRATTON 692249 GASKET CYLINDER HEAD  795 FREE SHIPPING
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Genuine Tecumseh 37028 Cylinder Head Gasket OEM
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Honda Engine GXV140 Cylinder Head 12200 ZG9 P41
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Cub Cadet Pulling Lawnmower Racing Command Cylinder Head NOS
Cub Cadet Pulling Lawnmower Racing Command Cylinder Head NOS
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Lawn Mower Cylinder Head
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Lawn Mower Cylinder Head
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Wisconsin Robin EY27W cylinder head 2131300123
Wisconsin Robin EY27W cylinder head 2131300123
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briggs and Btratton CYLINDER HEAD 691160
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Kohler K582 Cylinder Heads Head Engine John Deere Bobcat Wheel Horse
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Briggs and Stratton 195 HP 42E707 Opposed Twin Cylinder Head
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Briggs and Stratton 195 HP 42E707 Opposed Twin Cylinder Head
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Briggs  Stratton 93776 CYLINDER HEAD STUD
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Ariens 10HP Tecumseh Engine Blower Housing Baffle Cylinder Head Shield Cover Tin
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$11.95
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TECUMSEH 8 hp horizontal shaft cylinder head
TECUMSEH 8 hp horizontal shaft cylinder head
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Yanmar 4TN82E Cylinder Head  Howard Price John Deere Mustang
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Onan BF MS 16hp Engine Cylinder Heads
Onan BF MS 16hp Engine Cylinder Heads
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Cylinder Head Gasket Replaces Old Briggs Gross Hp Intek 273280sNew
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BS cylinder head from 8HP Leaf Blower
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John Deere Briggs  Stratton 18HP OHV VTwin 350777 Cylinder heads 809185 809186
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Briggs  Stratton 21 Hp Ohv I C V Twin Model 407777 Cylinder Head 2
Briggs Stratton 21 Hp Ohv I C V Twin Model 407777 Cylinder Head 2
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Briggs  Stratton Cylinder head 2 809201
Briggs Stratton Cylinder head 2 809201
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John Deere Kawasaki 17HP FC540V KS00 Cylinder Head Assembly AM109087
John Deere Kawasaki 17HP FC540V KS00 Cylinder Head Assembly AM109087
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Cylinder Head Gasket Replaces Old Briggs 271866sNew
Cylinder Head Gasket Replaces Old Briggs 271866sNew
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John Deere LX188 Kawasaki FD501V Cylinder Heads
John Deere LX188 Kawasaki FD501V Cylinder Heads
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BRIGGS  STRATTON IGNITION COIL 394891 TWIN CYLINDER L HEAD ENGINES 16 18HP
BRIGGS STRATTON IGNITION COIL 394891 TWIN CYLINDER L HEAD ENGINES 16 18HP
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Vintage Lawnflite Briggs and Stratton cylinder head package
Vintage Lawnflite Briggs and Stratton cylinder head package
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VINTAGE FORD 120 KOHLER k241 K301 ENGINE 10 12 HP CYLINDER HEAD
VINTAGE FORD 120 KOHLER k241 K301 ENGINE 10 12 HP CYLINDER HEAD
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TECUMSEH SEARS TORO HEAD CYLINDER GASKET 36787  37796
TECUMSEH SEARS TORO HEAD CYLINDER GASKET 36787 37796
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KOHLER OEM CYLINDER HEAD GASKET KIT PART 24 841 04 S OR 24 841 03 S
KOHLER OEM CYLINDER HEAD GASKET KIT PART 24 841 04 S OR 24 841 03 S
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Briggs  Stratton OEM Cylinder Head Gasket 805653 S 805653S New OD
Briggs Stratton OEM Cylinder Head Gasket 805653 S 805653S New OD
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Cylinder Head Gasket For Tecumseh 29953C
Cylinder Head Gasket For Tecumseh 29953C
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John Deere 110 Tractor Kohler K241 10hp Engine Cylinder Head
John Deere 110 Tractor Kohler K241 10hp Engine Cylinder Head
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kawasaki engine FJ180V CYLINDER HEAD 11008 7025 11008 7015
kawasaki engine FJ180V CYLINDER HEAD 11008 7025 11008 7015
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125hp Briggs and Stratton Engine Used Cylinder Head Shield Model 289707
125hp Briggs and Stratton Engine Used Cylinder Head Shield Model 289707
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HONDA HT 3813 Twin Cylinder Head
HONDA HT 3813 Twin Cylinder Head
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NEW OLD STOCK tecumseh part  30579 36438 cylinder head NEW IN THE BOX
NEW OLD STOCK tecumseh part 30579 36438 cylinder head NEW IN THE BOX
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Yard Machines 179cc OHV 365 SUB Cylinder head assembly GREATSHAPE N A
Yard Machines 179cc OHV 365 SUB Cylinder head assembly GREATSHAPE N A
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Honda GX OHV Commercial Cylinder Head Gasket 12281 889 010
Honda GX OHV Commercial Cylinder Head Gasket 12281 889 010
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BRIGGS  STRATTON QUANTUM 65 HP CYLINDER HEAD W SCREWS P N 691160
BRIGGS STRATTON QUANTUM 65 HP CYLINDER HEAD W SCREWS P N 691160
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MTD Huskee Supreme 260HP 54 Cut Briggs Stratton 446777 Engine Cylinder Heads
MTD Huskee Supreme 260HP 54 Cut Briggs Stratton 446777 Engine Cylinder Heads
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Briggs  Stratton 11HP 252707 Cylinder head GOOD SHAPE 691154 212914 212300
Briggs Stratton 11HP 252707 Cylinder head GOOD SHAPE 691154 212914 212300
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JOHN DEERE L110 LAWN  GARDEN TRACTOR CYLINDER HEAD SHIELD PART  M146631
JOHN DEERE L110 LAWN GARDEN TRACTOR CYLINDER HEAD SHIELD PART M146631
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Briggs  Stratton 272171 Cylinder Head Gasket GENUINE
Briggs Stratton 272171 Cylinder Head Gasket GENUINE
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Briggs  Stratton Cylinder Head  699486
Briggs Stratton Cylinder Head 699486
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Briggs and stratton 375 Hp Cylinder Head 9L902
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JOHN DEERE 160 165 Kawasaki FB460V Cylinder Head  NICE
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Briggs  Stratton 25HP Vintage 9FB Cylinder head 21853
Briggs Stratton 25HP Vintage 9FB Cylinder head 21853
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236675 236675 s cylinder head KOHLER ENGINE k241
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JOHN DEERE PART  CH10206 CYLINDER HEAD STUD
JOHN DEERE PART CH10206 CYLINDER HEAD STUD
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TECUMSEH CYLINDER HEAD COVER BREATHER SIDE 37628 USED
TECUMSEH CYLINDER HEAD COVER BREATHER SIDE 37628 USED
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TECUMSEH CYLINDER HEAD COVER 37627 USED
TECUMSEH CYLINDER HEAD COVER 37627 USED
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TORO WHEEL HORSE 212 H HYDRO ONAN 125 HP COMPLETE CYLINDER HEAD
TORO WHEEL HORSE 212 H HYDRO ONAN 125 HP COMPLETE CYLINDER HEAD
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Air Filter Briggs  Stratton Fits16 and 18 L Head Twin Cylinder Vertical Engines
Air Filter Briggs Stratton Fits16 and 18 L Head Twin Cylinder Vertical Engines
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