GB1379447A - Variable compression ratio pistons for internal combustion engines - Google Patents

Variable compression ratio pistons for internal combustion engines

Info

Publication number
GB1379447A
GB1379447A GB1278772A GB1278772A GB1379447A GB 1379447 A GB1379447 A GB 1379447A GB 1278772 A GB1278772 A GB 1278772A GB 1278772 A GB1278772 A GB 1278772A GB 1379447 A GB1379447 A GB 1379447A
Authority
GB
United Kingdom
Prior art keywords
oil
valve
chamber
discharge
piston shell
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.)
Expired
Application number
GB1278772A
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.)
TDY Industries LLC
Original Assignee
Teledyne Industries Inc
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 Teledyne Industries Inc filed Critical Teledyne Industries Inc
Priority to GB1278772A priority Critical patent/GB1379447A/en
Publication of GB1379447A publication Critical patent/GB1379447A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D15/00—Varying compression ratio
    • F02D15/04—Varying compression ratio by alteration of volume of compression space without changing piston stroke
    • 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
    • F02B75/00—Other engines
    • F02B75/04—Engines with variable distances between pistons at top dead-centre positions and cylinder heads
    • F02B75/044—Engines with variable distances between pistons at top dead-centre positions and cylinder heads by means of an adjustable piston length

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Abstract

1379447 Pistons; valves TELEDYNE INDUSTRIES Inc 18 March 1972 12787/72 Heading F2T and F2V In a variable compression ratio piston for an I.C. engine and having a piston shell 14 slidable on a carrier 12 and a variable volume oil chamber 30, 32 the discharge opening from the oil chamber is provided with a restricted annular oil-flow passage for filtering foreign objects from the oil. Figs. 1 and 3, shows the invention applied to the discharge opening 38, a ring member 36 being spaced from a wall 108 of an annular recess 104 to form the restricted annular oil-flow passage 114. Figs. 1 and 2, shows the invention applied to the discharge valve assembly 62, the valve casing 116 having a flange 132 spaced from a wall 122 of a bore 122 to form the restricted annular oilflow passage 130. In operation, oil is fed through the connecting rod, oil collector 50 and valve assembly 58 to the oil chamber which is divided into upper and lower chambers 30, 32. The valve assembly 58 consists of a pair of flat triangular valve plates 76 which float between valve seats 74 and castellated stop members 80, 82. During each cycle of operation, the piston shell 14 tends to move upwardly tending to expand the chamber 30 and contract the chamber 32 so that the lower valve-plate 76 closes oil to the lower chamber 32 to form an hydraulic lock between the piston shell and the carrier 14. Since, however, the discharge opening 38 permits oil to escape from the chamber 32, the piston shell will move upwardly a small distance on each engine cycle. When the gas pressure exceeds the upper limit, the discharge valve member 136 of the discharge valve assembly 62 lifts to discharge some oil from the chamber 30. This oil passes through the passages 130, 124 and 128 to act on an annular surface 143 of the valve member 136. When the oil pressure exceeds the upper limit, the valve member lifts to discharge the oil through the discharge orifice 134 in the valve seat 142 to the crankcase. The valve assemblies 58 and 62 are preferably conically-shaped for retention in bores provided in the carrier.
GB1278772A 1972-03-18 1972-03-18 Variable compression ratio pistons for internal combustion engines Expired GB1379447A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1278772A GB1379447A (en) 1972-03-18 1972-03-18 Variable compression ratio pistons for internal combustion engines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1278772A GB1379447A (en) 1972-03-18 1972-03-18 Variable compression ratio pistons for internal combustion engines

Publications (1)

Publication Number Publication Date
GB1379447A true GB1379447A (en) 1975-01-02

Family

ID=10011118

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1278772A Expired GB1379447A (en) 1972-03-18 1972-03-18 Variable compression ratio pistons for internal combustion engines

Country Status (1)

Country Link
GB (1) GB1379447A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105673203A (en) * 2016-04-07 2016-06-15 吉林大学 Ratchet wheel-driven variable compression ratio piston connecting rod assembly
CN105822424A (en) * 2016-04-01 2016-08-03 贵州大学 Engine with variable compression ratio
CN105927396A (en) * 2016-06-07 2016-09-07 吉林大学 Piston-and-connecting-rod assembly adopting novel compression ratio

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105822424A (en) * 2016-04-01 2016-08-03 贵州大学 Engine with variable compression ratio
CN105822424B (en) * 2016-04-01 2018-06-05 贵州大学 A kind of variable compression ratio engine
CN105673203A (en) * 2016-04-07 2016-06-15 吉林大学 Ratchet wheel-driven variable compression ratio piston connecting rod assembly
CN105673203B (en) * 2016-04-07 2017-12-15 吉林大学 A kind of ratchet drive-type variable-compression-ratio piston link assembly
CN105927396A (en) * 2016-06-07 2016-09-07 吉林大学 Piston-and-connecting-rod assembly adopting novel compression ratio
CN105927396B (en) * 2016-06-07 2018-08-17 吉林大学 A kind of new type of compression compares piston rod part

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee