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.

Wisconsin Part  SE 309 Cylinder Head Tin S14D Bolens 1455 1476 1477
Wisconsin Part SE 309 Cylinder Head Tin S14D Bolens 1455 1476 1477
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Cub Cadet 1015 1020 Briggs and Stratton 10hp Cylinder Head Shroud 224897
Cub Cadet 1015 1020 Briggs and Stratton 10hp Cylinder Head Shroud 224897
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Briggs  Stratton 21 HP Intek Lawn Tractor Small Engine Cylinder Head
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CYLINDER HEAD BASE GASKET STIHL 064 066
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John Deere 318 420 316 Tractor Onan P218G 18hp Engine Cylinder Heads
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GENUINE Briggs  Stratton 796584 Cylinder Head 272475 Rocker Cover Gasket SET
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Kohler k301 cylinder head Cub Cadet
Kohler k301 cylinder head Cub Cadet
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Kohler Command 13 14 15 HP CV15S Cylinder head OHV assembly very good condition
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Kohler 25 hp CV25S Head covers shrouds shroud CV25 S Twin cylinder
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9hp Kohler Command CV1259 Engine Cylinder Head with Valve Cover John Deere STX30
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Simplicity Allis Chalmers Briggs  Stratton 16 HP Engine Cylinder Head 326437
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MTD YARD MAN MACHINE 21 IN CUT 65 HORSE INTEK 121607 CYLINDER HEAD
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Cylinder Head Gasket For Briggs  Stratton 692230 272165 270273
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Honda GX160 GX200 cylinder head assembly
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Oregon 50 542 Cylinder Head Gasket RC
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BS 692230 BRIGGS GASKET CYLINDER HEAD 692230 Briggs  Stratton Engine Parts
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cub cadet simplicity JD kohler magnum M20 MV20 engine cylinder head FREE SHIP
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KOHLER K241 CYLINDER HEAD WITH GASKET AND BOLTS USED GRAVELY WHEEL HORSE
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GENUINE Tecumseh Cylinder Head Gasket 34923A
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GENUINE Briggs  Stratton 799859 Cylinder Head Replaces  794870 793009 698040
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Cylinder Head Gasket Briggs  Stratton 698717 272536 270341 or 272170 1482
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White Power Equipment 133H471F190 Lawn Tractor Cylinder Head Part  BS494240
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Cylinder Head Gasket Briggs  Stratton 272167 27670 1479 Free Shipping
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New OEM Briggs and Stratton CYLINDER HEAD GASKET 27463 New Old Stock NOS
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OEM KAWASAKI CYLINDER HEAD GASKET PART 11004 7026
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7HP Long Head Cylinder Head Assembly with gasket Fits BRUTE 196cc 030634
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Sears Craftsman 91725950 ONAN 16HP BF MS 2833E Cylinder heads PAIR set 1
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2 Cylinder Head Assembly W Valve Cover off a Honda GXV610 Engine
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Simplicity 725 Tractor Briggs Stratton Model 19 7 1 4hp Engine Cylinder Head
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BRIGGS  STRATTON 130202 CYLINDER HEAD W BOLTS P N 691716 691659 691640
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Briggs  Stratton horizontal engine Used 797439 cylinder head assembly intek
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Onan 18HP Performer 18XSL Case 4018 P218G Cylinder head NICE SHAPE 170 4097
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SIMPLICITY 1693606 BROADMOOR LAWN TRACTOR CYLINDER HEAD 2 PART  BS809201
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Toro 5HP Rtek CCR2450 Snow thrower blower 38515 Cylinder head GOOD SHAPE 801283
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John Deere M143895 Tractor Engine Cylinder Head GasketLot of 1
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John Deere  M153443 Engine Cylinder Head Gasket  Lot of 1
John Deere M153443 Engine Cylinder Head Gasket Lot of 1
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John Deere  M152699 M42202 Engine Cylinder Head Gasket  Lot of 1
John Deere M152699 M42202 Engine Cylinder Head Gasket Lot of 1
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11 New OEM Briggs and Stratton CYLINDER HEAD GASKETS 272536S New Old Stock NOS
11 New OEM Briggs and Stratton CYLINDER HEAD GASKETS 272536S New Old Stock NOS
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Briggs  Stratton cylinder head 1 493457   JSE
Briggs Stratton cylinder head 1 493457 JSE
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Cylinder Head Gasket Tecumseh 33015 33015A LAV40
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John Deere No M45577 Engine Cylinder Head Gasket NOS
John Deere No M45577 Engine Cylinder Head Gasket NOS
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20 841 02 S OEM Kohler Cylinder Head Gasket Kit 20 041 08 S SV470 SV480 SV530
20 841 02 S OEM Kohler Cylinder Head Gasket Kit 20 041 08 S SV470 SV480 SV530
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BRIGGS  STRATTON Head Cylinder 691154 replaces 212914
BRIGGS STRATTON Head Cylinder 691154 replaces 212914
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Briggs Stratton Parts GASKET CYLINDER HEAD BS 272157S Briggs BS 272157
Briggs Stratton Parts GASKET CYLINDER HEAD BS 272157S Briggs BS 272157
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NEW HONDA PISTON RINGS RING SET AND CYLINDER HEAD GASKET GX200
NEW HONDA PISTON RINGS RING SET AND CYLINDER HEAD GASKET GX200
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NEW OEM Genuine Kohler Cylinder Head Gasket Kit 2484103S 24 841 03 S 24 841 03S
NEW OEM Genuine Kohler Cylinder Head Gasket Kit 2484103S 24 841 03 S 24 841 03S
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Genuine Kohler 24 318 150 S Cylinder Head OEM NEW
Genuine Kohler 24 318 150 S Cylinder Head OEM NEW
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Kohler Cylinder Head Part  24 318 18 S
Kohler Cylinder Head Part 24 318 18 S
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20HP Briggs  Stratton Engine Head single cylinder 310677
20HP Briggs Stratton Engine Head single cylinder 310677
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NEW Honda GX200 65 HP CYLINDER HEAD FITS 65HP ENGINE AND GASKET
NEW Honda GX200 65 HP CYLINDER HEAD FITS 65HP ENGINE AND GASKET
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Massey Ferguson MF 12 Hydra 12 Tractor Tecumseh HH120 12hp Engine Cylinder Head
Massey Ferguson MF 12 Hydra 12 Tractor Tecumseh HH120 12hp Engine Cylinder Head
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OEM LOT OF 2 Tecumseh 35306A Cylinder Head Gasket free Ship
OEM LOT OF 2 Tecumseh 35306A Cylinder Head Gasket free Ship
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OEM Tecumseh 36337 Cylinder Head Gasket engine Lawnmower Free Ship
OEM Tecumseh 36337 Cylinder Head Gasket engine Lawnmower Free Ship
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Briggs  Stratton 272536s 698717 LOT OF 5 Cylinder Head Gasket free ship
Briggs Stratton 272536s 698717 LOT OF 5 Cylinder Head Gasket free ship
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OEM Toro Tecumseh 36445 Cylinder Head Gasket engine Lawnmower Free Ship
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OEM Tecumseh 36453 H70 Cylinder Head Gasket engine Lawnmower Free Ship
OEM Tecumseh 36453 H70 Cylinder Head Gasket engine Lawnmower Free Ship
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KOHLER COURAGE 22 SV715 0016 CYLINDER HEAD NO1 PART  KH32 318 19 S
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2 Original NOS Briggs  Stratton Gaskets Cylinder Head 270430
2 Original NOS Briggs Stratton Gaskets Cylinder Head 270430
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FORD CM274 Front Mower Shibuara J823 27hp Diesel Engine Cylinder Head
FORD CM274 Front Mower Shibuara J823 27hp Diesel Engine Cylinder Head
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24 318 108 S OEM Kohler 1 Cylinder Head Kit 24 318 17 S 24 318 69 S CV25 CV725
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Briggs  Stratton 20HP I C OHV 407777 Cylinder head 2 796633
Briggs Stratton 20HP I C OHV 407777 Cylinder head 2 796633
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Kohler CYLINDER HEAD ASSEMBLY 12 318 50 S PUSH rods 12 411 04 S CV15 41596
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KOHLER CV13 21509 CYLINDER OHV HEAD PUSH RODS JOHN DEERE 12 755 62 12 755 58
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Tecumseh Cylinder Head Breather Side 37389 opposite Breather Side 37387 Push Rod
Tecumseh Cylinder Head Breather Side 37389 opposite Breather Side 37387 Push Rod
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MTD YARD MACHINE BRIGGS  Stratton 09P602 0023 F1 Head Cylinder 590525 with rods
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Briggs Stratton Parts GASKET CYLINDER HEAD BS 272163S BS 272163
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Wheel Horse Lawn Ranger Tractor Tecumseh H50 5hp Engine Cylinder Head
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494240 BRIGGS  STRATTON HEAD CYLINDER
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Tecumseh 29953C 11 Cylinder Head Gaskets
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Genuine Tecumseh 28938C Cylinder Head Gasket HH HSK H TVM OEM
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