GB2620066A - A piston for a lean-burn gasoline engine - Google Patents

A piston for a lean-burn gasoline engine Download PDF

Info

Publication number
GB2620066A
GB2620066A GB2315306.7A GB202315306A GB2620066A GB 2620066 A GB2620066 A GB 2620066A GB 202315306 A GB202315306 A GB 202315306A GB 2620066 A GB2620066 A GB 2620066A
Authority
GB
United Kingdom
Prior art keywords
piston
working surface
gasoline engine
central
cylinder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
GB2315306.7A
Inventor
Johnson Jack
Mcwilliam Lyn
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jaguar Land Rover Ltd
Original Assignee
Jaguar Land Rover Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jaguar Land Rover Ltd filed Critical Jaguar Land Rover Ltd
Publication of GB2620066A publication Critical patent/GB2620066A/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
    • F02B23/08—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition
    • F02B23/10—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition with separate admission of air and fuel into cylinder
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
    • F02B23/08—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition
    • F02B23/10—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition with separate admission of air and fuel into cylinder
    • F02B2023/106—Tumble flow, i.e. the axis of rotation of the main charge flow motion is horizontal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
    • F02B23/08—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition
    • F02B23/10—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition with separate admission of air and fuel into cylinder
    • F02B23/101—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition with separate admission of air and fuel into cylinder the injector being placed on or close to the cylinder centre axis, e.g. with mixture formation using spray guided concepts

Abstract

A piston (54) for a high compression lean-burn gasoline engine comprising a cylinder (57), an air inlet (49a, 49b) and an exhaust outlet (56a, 56b), wherein the air inlet (49a, 49b) and the exhaust outlet (56a, 56b) are arranged about a longitudinal axis (60) of the cylinder (57). The piston (54) comprises a circular peripheral wall (141) having a central axis (142) aligned with the longitudinal axis (160) of the cylinder (57), a working surface (79) which has a circular periphery. The working surface (79) comprises a flat elongate central surface (143) extending across the majority of the width of the working surface (79) perpendicular to the central axis (142). The central surface (143) has two ends (148a, 148b) located on opposite sides of the central axis (142) and opposing side edges (149, 150) which are separated by the two ends (148a, 148b) of the central surface (143). A spark plug bowl (166) is located in at the centre of the working surface (79).

Claims (7)

1. A piston for a high compression lean-burn gasoline engine comprising a cylinder, an air inlet and an exhaust outlet, wherein the air inlet and the exhaust outlet are arranged about a longitudinal axis of the cylinder, the piston arranged to operate in the cylinder, the piston comprising: a circular peripheral wall having a central axis, wherein the peripheral wall is configured so that the central axis is substantially aligned with the longitudinal axis of the cylinder in use; and a working surface having a circular periphery and comprising: a flat elongate central surface extending across the majority of the width of the working surface perpendicular to the central axis and having two ends each located on opposite sides of the central axis, wherein opposing side edges of the central surface are separated by the two ends of the central surface; and a spark plug bowl located in the flat elongate central surface substantially at the centre of the working surface.
2. A piston as claimed in claim 1 , wherein the working surface comprises depressions for accommodating valve heads of the high compression lean-burn gasoline engine in use when the piston is at top dead centre.
3. A piston as claimed in any preceding claim, wherein the working surface comprises sloped surface portions located radially outward of the central surface with respect to the circular periphery of the working surface, wherein each sloped surface portion extends away from a side edge of the flat elongate central surface downwardly towards the peripheral edge of the working surface.
4. A piston as claimed in claim 3 for a high compression lean-burn gasoline engine comprising a combustion chamber, wherein the sloped surface portions of the working surface are configured to conform to at least part of a roof surface of the combustion chamber.
5. A high compression lean-burn gasoline engine comprising a piston as claimed in any one of claims 1 to 4.
6. A high compression lean-burn gasoline engine as claimed in claim 5, comprising: a cylinder head having a combustion chamber formed therein, wherein at least part of the roof of the combustion chamber is configured to conform to the sloped surface portions of the working surface of the piston in use; and a piston as claimed in claim 4.
7. A vehicle comprising a high compression lean-burn gasoline engine according to claim 5 or claim 6.
GB2315306.7A 2021-03-26 2021-03-26 A piston for a lean-burn gasoline engine Pending GB2620066A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2021/057924 WO2022199838A1 (en) 2021-03-26 2021-03-26 A piston for a lean-burn gasoline engine

Publications (1)

Publication Number Publication Date
GB2620066A true GB2620066A (en) 2023-12-27

Family

ID=75396712

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2315306.7A Pending GB2620066A (en) 2021-03-26 2021-03-26 A piston for a lean-burn gasoline engine

Country Status (2)

Country Link
GB (1) GB2620066A (en)
WO (1) WO2022199838A1 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0358420A2 (en) * 1988-09-07 1990-03-14 Hoechst Celanese Corporation Method of producing 1-(4'-isobutylphenyl) ethanol
WO2015162796A1 (en) * 2014-04-25 2015-10-29 日産自動車株式会社 Cylinder direct injection internal combustion engine

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6515941B2 (en) * 2017-03-27 2019-05-22 マツダ株式会社 Spark-ignition type internal combustion engine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0358420A2 (en) * 1988-09-07 1990-03-14 Hoechst Celanese Corporation Method of producing 1-(4'-isobutylphenyl) ethanol
WO2015162796A1 (en) * 2014-04-25 2015-10-29 日産自動車株式会社 Cylinder direct injection internal combustion engine

Also Published As

Publication number Publication date
WO2022199838A1 (en) 2022-09-29

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