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.

Briggs Stratton Cylinder Heads Left and Right for 21 thru 26 V Twin Engines
Briggs Stratton Cylinder Heads Left and Right for 21 thru 26 V Twin Engines
$49.00
Time Remaining: 39m

Briggs and Stratton Cylinder Head Gasket P N 465013
Briggs and Stratton Cylinder Head Gasket P N 465013
$3.00
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NEW BRIGGS TAKE OFF CYLINDER HEAD ASSY OEM
NEW BRIGGS TAKE OFF CYLINDER HEAD ASSY OEM
$59.89
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Briggs and Stratton Cylinder Head Gasket P N 465054 OLD P N 270430 272163
Briggs and Stratton Cylinder Head Gasket P N 465054 OLD P N 270430 272163
$3.50
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Honda Gx390 Cylinder Head
Honda Gx390 Cylinder Head
$30.00
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VINTAGE CLINTON ENGINE CYLINDER HEAD B704 B 704 MOTOR
VINTAGE CLINTON ENGINE CYLINDER HEAD B704 B 704 MOTOR
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Onan CCKA Cylinder Heads CCK Gravely Lincoln Welder Deere Sears 40 55
Onan CCKA Cylinder Heads CCK Gravely Lincoln Welder Deere Sears 40 55
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Toro Wheel Horse John Deere Onan P218G P220G Right Hand Cylinder Head 110 3509
Toro Wheel Horse John Deere Onan P218G P220G Right Hand Cylinder Head 110 3509
$24.89
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Kohler 17hp cylinder head
Kohler 17hp cylinder head
$45.00
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John Deere 316 Tractor Onan B43E 16hp Engine Cylinder Heads
John Deere 316 Tractor Onan B43E 16hp Engine Cylinder Heads
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Genuine Honda 12200 Z1C 406 Cylinder Head GX340UT1 GX340RT1 GX390T1 GX390UT1 OEM
Genuine Honda 12200 Z1C 406 Cylinder Head GX340UT1 GX340RT1 GX390T1 GX390UT1 OEM
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Briggs and stratton cylinder head opposed twin II 16 hp
Briggs and stratton cylinder head opposed twin II 16 hp
$9.00
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Briggs  Stratton 710137 Cylinder Head Gasket
Briggs Stratton 710137 Cylinder Head Gasket
$3.00
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USED  5 BRIGGS AND STRATTON CYLINDER HEAD ENGINE
USED 5 BRIGGS AND STRATTON CYLINDER HEAD ENGINE
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HONDA LAWN MOWER HR17 F200 CYLINDER HEAD GASKET 12281 896 000 or 12281 896 306
HONDA LAWN MOWER HR17 F200 CYLINDER HEAD GASKET 12281 896 000 or 12281 896 306
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For Honda GX110 GX120 GX140 GX160  GX200 Cylinder Head Cover Assembly
For Honda GX110 GX120 GX140 GX160 GX200 Cylinder Head Cover Assembly
$26.28
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Genuine Baja WD90 329 OEM Cylinder Head Left Side Cover Gasket Dirt Runner
Genuine Baja WD90 329 OEM Cylinder Head Left Side Cover Gasket Dirt Runner
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Kohler Cylinder Head Gasket 24 841 01 24 841 01 s Kit
Kohler Cylinder Head Gasket 24 841 01 24 841 01 s Kit
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2 PACK Kohler Cylinder Head Gasket 24 841 01 24 841 01 s Kit
2 PACK Kohler Cylinder Head Gasket 24 841 01 24 841 01 s Kit
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Tecumseh Cylinder Head Gasket 32643A Models HS40 ECV105 ECV100 LAV40
Tecumseh Cylinder Head Gasket 32643A Models HS40 ECV105 ECV100 LAV40
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kohler k241 magnum m10 cylinder head good condition 10hp 310 8
kohler k241 magnum m10 cylinder head good condition 10hp 310 8
$32.99
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Briggs and Stratton 45 Cylinder Head 590411
Briggs and Stratton 45 Cylinder Head 590411
$11.75
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Cylinder Head Gasket OEM Briggs  Stratton 272916
Cylinder Head Gasket OEM Briggs Stratton 272916
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CRAFTSMANTOROMTDBRIGGS  STRATTON 375 Hp cylinder head part  790169 used
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Tecumseh Cylinder Head Gasket 34041B Models HM100 HMSK100 TVXL220 TVM220
Tecumseh Cylinder Head Gasket 34041B Models HM100 HMSK100 TVXL220 TVM220
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Briggs and Stratton 794114 Cylinder Head gasket 272475 rocker gasket combo
Briggs and Stratton 794114 Cylinder Head gasket 272475 rocker gasket combo
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Tecumseh Gasket Cylinder Head 29953C Models 38035 18212 19273 20571 19225
Tecumseh Gasket Cylinder Head 29953C Models 38035 18212 19273 20571 19225
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Briggs and Stratton Gasket Cylinder Head 1 271867S Models 30116 422400
Briggs and Stratton Gasket Cylinder Head 1 271867S Models 30116 422400
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Gilson 52084A Tractor Briggs  Stratton 422777 18hp Engine Cylinder Heads
Gilson 52084A Tractor Briggs Stratton 422777 18hp Engine Cylinder Heads
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Briggs  Stratton Gasket Cylinder Head 272200S Models 16400 20434 20667
Briggs Stratton Gasket Cylinder Head 272200S Models 16400 20434 20667
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CYLINDER HEAD GASKET FITS HONDA GX390
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NEW Honda GX160 55 HP CYLINDER HEAD FITS 55HP ENGINE
NEW Honda GX160 55 HP CYLINDER HEAD FITS 55HP ENGINE
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CYLINDER HEAD GASKET FITS HONDA GX270
CYLINDER HEAD GASKET FITS HONDA GX270
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Bolens 900 Tractor Wisconsin S 8D Engine Cylinder Head
Bolens 900 Tractor Wisconsin S 8D Engine Cylinder Head
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Tecumseh 4HP Toro 4 21 HS40 Cylinder head GOOD SHAPE 37675 33016A 36441
Tecumseh 4HP Toro 4 21 HS40 Cylinder head GOOD SHAPE 37675 33016A 36441
$15.00
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CYLINDER HEAD GASKET Honda 8HP GX240
CYLINDER HEAD GASKET Honda 8HP GX240
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Tecumseh Engine Part  32631A CYLINDER HEAD GASKET
Tecumseh Engine Part 32631A CYLINDER HEAD GASKET
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OEM TECUMSEH CYLINDER HEAD GASKET PART 29953C
OEM TECUMSEH CYLINDER HEAD GASKET PART 29953C
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OEM TECUMSEH CYLINDER HEAD GASKET PART 31923
OEM TECUMSEH CYLINDER HEAD GASKET PART 31923
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OEM TECUMSEH CYLINDER HEAD GASKET PART 36738
OEM TECUMSEH CYLINDER HEAD GASKET PART 36738
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OEM TECUMSEH CYLINDER HEAD GASKET PART 32643
OEM TECUMSEH CYLINDER HEAD GASKET PART 32643
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HONDA GX120 4 HP CYLINDER HEAD GASKET 4HP ENGINE NEW ALSDO FITS WATER PUMPS
HONDA GX120 4 HP CYLINDER HEAD GASKET 4HP ENGINE NEW ALSDO FITS WATER PUMPS
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OEM TECUMSEH CYLINDER HEAD GASKET PART 34923A
OEM TECUMSEH CYLINDER HEAD GASKET PART 34923A
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BRIGGS  STRATTON CYLINDER HEAD PART  BS790169
BRIGGS STRATTON CYLINDER HEAD PART BS790169
$14.52
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INTEK OHV Briggs  Stratton 20HP John Deere L120 406777 Cylinder head 1 214612
INTEK OHV Briggs Stratton 20HP John Deere L120 406777 Cylinder head 1 214612
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Briggs and Stratton 20 HP V Twin Cylinder Head 2 796633 for Motor 407777 0124
Briggs and Stratton 20 HP V Twin Cylinder Head 2 796633 for Motor 407777 0124
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TROY BILT MODEL 13027 ENGINE CV14S KOHLER COMMAND ENGINE CYLINDER HEAD
TROY BILT MODEL 13027 ENGINE CV14S KOHLER COMMAND ENGINE CYLINDER HEAD
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TROY BILT MODEL 13027 ENGINE CV14S KOHLER COMMAND ENGINE CYLINDER HEAD BOLTS
TROY BILT MODEL 13027 ENGINE CV14S KOHLER COMMAND ENGINE CYLINDER HEAD BOLTS
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NEW CYLINDER HEAD GASKET 9HP HONDA GX270 GAS ENGINE
NEW CYLINDER HEAD GASKET 9HP HONDA GX270 GAS ENGINE
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Briggs and Stratton cylinder head 698148 17 hp Intek ss  793989
Briggs and Stratton cylinder head 698148 17 hp Intek ss 793989
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Kawasaki FA210V CYLINDER HEAD 11001 2101  John Deere RX63
Kawasaki FA210V CYLINDER HEAD 11001 2101 John Deere RX63
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Robin Subaru Cylinder Head w Valve cover PN 279 13001 01
Robin Subaru Cylinder Head w Valve cover PN 279 13001 01
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Honda GX200 65HP Piston Kit Air Filter Connecting Rod Cylinder Head Rocker Arms
Honda GX200 65HP Piston Kit Air Filter Connecting Rod Cylinder Head Rocker Arms
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HUSKEE MODEL 136H450F131 TRACTOR CYLINDER HEAD PART NUMBER BS494240
HUSKEE MODEL 136H450F131 TRACTOR CYLINDER HEAD PART NUMBER BS494240
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Honda GX240 8HP Piston Kit Connecting Rod Air Filter Cylinder Head Rocker Arms
Honda GX240 8HP Piston Kit Connecting Rod Air Filter Cylinder Head Rocker Arms
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OEM TECUMSEH CYLINDER HEAD GASKET PART 32631A
OEM TECUMSEH CYLINDER HEAD GASKET PART 32631A
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Honda GX270 9HP Piston Kit Air Filter Cylinder Head Connecting Rod Rocker Arms
Honda GX270 9HP Piston Kit Air Filter Cylinder Head Connecting Rod Rocker Arms
$223.00
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Honda GX340 11HP Connecting Rod Piston Kit Air Filter Cylinder Head Rocker Arms
Honda GX340 11HP Connecting Rod Piston Kit Air Filter Cylinder Head Rocker Arms
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OEM TECUMSEH CYLINDER HEAD GASKET PART 33015A
OEM TECUMSEH CYLINDER HEAD GASKET PART 33015A
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Honda GX390 13HP Piston Kit Air Filter Connecting Rod Cylinder Head Rocker Arms
Honda GX390 13HP Piston Kit Air Filter Connecting Rod Cylinder Head Rocker Arms
$120.90
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CASE 446 TRACTOR CYLINDER HEAD AIR HOUSING PART  134 4371
CASE 446 TRACTOR CYLINDER HEAD AIR HOUSING PART 134 4371
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Honda GX610 V Twin Cylinder 18HP Engine Head Bolts
Honda GX610 V Twin Cylinder 18HP Engine Head Bolts
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CASE 446 TRACTOR RH CYLINDER HEAD PART  110 2564
CASE 446 TRACTOR RH CYLINDER HEAD PART 110 2564
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OEM TECUMSEH CYLINDER HEAD GASKET PART 36477
OEM TECUMSEH CYLINDER HEAD GASKET PART 36477
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OEM TECUMSEH CYLINDER HEAD GASKET PART 37028
OEM TECUMSEH CYLINDER HEAD GASKET PART 37028
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CASE 446 TRACTOR LH CYLINDER HEAD PART  110 2563
CASE 446 TRACTOR LH CYLINDER HEAD PART 110 2563
$55.01
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McCulloch 40005102 11 07248 Blower Cylinder Head
McCulloch 40005102 11 07248 Blower Cylinder Head
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Kohler Gasket Cylinder Head 4704115 S Models M10 461512 M10 461523
Kohler Gasket Cylinder Head 4704115 S Models M10 461512 M10 461523
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Briggs and Stratton cylinder head 795501      JSE
Briggs and Stratton cylinder head 795501 JSE
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JOHN DEERE 175 HYDRO LAWNMOWER CYLINDER HEAD PART  AM109218
JOHN DEERE 175 HYDRO LAWNMOWER CYLINDER HEAD PART AM109218
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Honda GX160 55HP Rockers Cylinder Head Kit Inlet  Exhaust Valves Head Gasket
Honda GX160 55HP Rockers Cylinder Head Kit Inlet Exhaust Valves Head Gasket
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New Honda GX240 8HP Rockers Cylinder Head Kit Inlet  Exhaust Valves Head Gasket
New Honda GX240 8HP Rockers Cylinder Head Kit Inlet Exhaust Valves Head Gasket
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New Honda GX270 9HP Rockers Cylinder Head Kit Inlet  Exhaust Valves Head Gasket
New Honda GX270 9HP Rockers Cylinder Head Kit Inlet Exhaust Valves Head Gasket
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New Honda GX340 11HP Rocker Cylinder Head Kit Inlet  Exhaust Valves Head Gasket
New Honda GX340 11HP Rocker Cylinder Head Kit Inlet Exhaust Valves Head Gasket
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New Honda GX390 13HP Rocker Cylinder Head Kit Inlet  Exhaust Valves Head Gasket
New Honda GX390 13HP Rocker Cylinder Head Kit Inlet Exhaust Valves Head Gasket
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Cylinder Head Gasket Tecumseh 34041 33270 34923 Sears 465450 Replacement 2762
Cylinder Head Gasket Tecumseh 34041 33270 34923 Sears 465450 Replacement 2762
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