GB1298665A - Improvements in or relating to step-piston two-stroke engines - Google Patents

Improvements in or relating to step-piston two-stroke engines

Info

Publication number
GB1298665A
GB1298665A GB422/69A GB42269A GB1298665A GB 1298665 A GB1298665 A GB 1298665A GB 422/69 A GB422/69 A GB 422/69A GB 42269 A GB42269 A GB 42269A GB 1298665 A GB1298665 A GB 1298665A
Authority
GB
United Kingdom
Prior art keywords
receiver
piston
cylinder
volume
pressure
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
GB422/69A
Inventor
Bernard Hooper
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB422/69A priority Critical patent/GB1298665A/en
Priority to US798688A priority patent/US3550569A/en
Priority to DE1909057A priority patent/DE1909057C3/en
Priority to JP44021996A priority patent/JPS4835888B1/ja
Priority to CH1155569A priority patent/CH497642A/en
Priority to FR6933564A priority patent/FR2027698A1/fr
Publication of GB1298665A publication Critical patent/GB1298665A/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
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B33/00—Engines characterised by provision of pumps for charging or scavenging
    • F02B33/02—Engines with reciprocating-piston pumps; Engines with crankcase pumps
    • F02B33/06—Engines with reciprocating-piston pumps; Engines with crankcase pumps with reciprocating-piston pumps other than simple crankcase pumps
    • F02B33/10—Engines with reciprocating-piston pumps; Engines with crankcase pumps with reciprocating-piston pumps other than simple crankcase pumps with the pumping cylinder situated between working cylinder and crankcase, or with the pumping cylinder surrounding working cylinder
    • F02B33/14—Engines with reciprocating-piston pumps; Engines with crankcase pumps with reciprocating-piston pumps other than simple crankcase pumps with the pumping cylinder situated between working cylinder and crankcase, or with the pumping cylinder surrounding working cylinder working and pumping pistons forming stepped piston
    • 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
    • F02B25/00—Engines characterised by using fresh charge for scavenging cylinders
    • 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
    • F02B75/02—Engines characterised by their cycles, e.g. six-stroke
    • F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
    • F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two
    • 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
    • F02B2700/00—Measures relating to the combustion process without indication of the kind of fuel or with more than one fuel
    • F02B2700/03—Two stroke engines
    • F02B2700/031—Two stroke engines with measures for removing exhaust gases from the cylinder

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Supercharger (AREA)
  • Reciprocating Pumps (AREA)

Abstract

1298665 Two-stroke I. C. engines B HOOPER 28 Jan 1970 [3 Jan 1969] 422/69 Heading F1B The pumping part 16 of a stepped-piston 14 forces the charge on the upstroke through a port 36, controlled by a piston recess 38, 39, into a receiver 30 having a movable wall formed by a diaphragm 32. Near the bottom of the downstroke the top of the piston 14 uncovers the port 36 and the charge flows from the receiver 30 into the cylinder 12. The diaphragm 32 is subjected, on the side opposite the receiver 30, to the pressure in the crank-case 13, the force of a spring (46), Fig.3 (not shown), or the pressure in a chamber (52), Fig.4 (not shown), connected to an air or fuel-air mixture bleed from the engine providing a substantially constant pressure. On the piston upstroke the diaphragm 32 moves to increase the receiver volume and on the downstroke it moves to decrease the receiver volume. In a multi-cylinder engine a separate receiver 30 is provided for each cylinder and the crankcase 13 may be divided into respective chambers. The total volume of the receiver 30 and the passage 35 leading to the cylinder 12 is between three and twelve times the pumping swept volume, preferably between four and six times. The pumping cylinder inlet 22 is connected to a carburetter and contains a reed valve 23. The volume of the crank-case 13 may be such that the pressure therein during engine operation is substantially constant.
GB422/69A 1969-01-03 1969-01-03 Improvements in or relating to step-piston two-stroke engines Expired GB1298665A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
GB422/69A GB1298665A (en) 1969-01-03 1969-01-03 Improvements in or relating to step-piston two-stroke engines
US798688A US3550569A (en) 1969-01-03 1969-02-12 Step-piston two-stroke engines
DE1909057A DE1909057C3 (en) 1969-01-03 1969-02-22 Step piston two-stroke internal combustion engine
JP44021996A JPS4835888B1 (en) 1969-01-03 1969-03-24
CH1155569A CH497642A (en) 1969-01-03 1969-07-29 Two-stroke internal combustion engine
FR6933564A FR2027698A1 (en) 1969-01-03 1969-10-01

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB422/69A GB1298665A (en) 1969-01-03 1969-01-03 Improvements in or relating to step-piston two-stroke engines

Publications (1)

Publication Number Publication Date
GB1298665A true GB1298665A (en) 1972-12-06

Family

ID=9704077

Family Applications (1)

Application Number Title Priority Date Filing Date
GB422/69A Expired GB1298665A (en) 1969-01-03 1969-01-03 Improvements in or relating to step-piston two-stroke engines

Country Status (6)

Country Link
US (1) US3550569A (en)
JP (1) JPS4835888B1 (en)
CH (1) CH497642A (en)
DE (1) DE1909057C3 (en)
FR (1) FR2027698A1 (en)
GB (1) GB1298665A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1544052A (en) * 1977-09-22 1979-04-11 Favill J Stepped piston two-stroke engines
FR2433101A1 (en) * 1978-08-07 1980-03-07 Unic Sa IMPROVEMENT IN COOLING DEVICES FOR INTERNAL COMBUSTION ENGINES
GB8525854D0 (en) * 1985-10-19 1985-11-20 Hooper B I c engine
GB8906279D0 (en) * 1989-03-18 1989-05-04 Hooper Bernard Internal combustion engine
US6782850B2 (en) * 2001-03-23 2004-08-31 Tapia P. Hector L. Two stroke engine having reduced height pistons

Also Published As

Publication number Publication date
DE1909057A1 (en) 1971-02-11
DE1909057B2 (en) 1974-05-09
US3550569A (en) 1970-12-29
JPS4835888B1 (en) 1973-10-31
FR2027698A1 (en) 1970-10-02
DE1909057C3 (en) 1975-01-09
CH497642A (en) 1970-10-15

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees