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1. WO2003064826 - A CRANKCASE SCAVENGED FOUR−STROKE ENGINE

Publication Number WO/2003/064826
Publication Date 07.08.2003
International Application No. PCT/SE2003/000165
International Filing Date 30.01.2003
Chapter 2 Demand Filed 29.08.2003
IPC
F01M 1/04 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
MLUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL-COMBUSTION ENGINES; CRANKCASE VENTILATING
1Pressure lubrication
04using pressure in working cylinder or crankcase to operate lubricant-feeding devices
F01M 3/00 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
MLUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL-COMBUSTION ENGINES; CRANKCASE VENTILATING
3Lubrication specially adapted for engines with crankcase compression of fuel-air mixture, or for other engines in which lubricant is contained in fuel, combustion air, or fuel-air mixture
F01M 11/06 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
MLUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL-COMBUSTION ENGINES; CRANKCASE VENTILATING
11Component parts, details, or accessories, not provided for in, or of interest apart from, groups F01M1/-F01M9/149
06Means for keeping lubricant level constant or for accommodating movement or position of machines or engines
F02B 63/02 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
63Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices
02for hand-held tools
F02B 75/02 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
75Other engines, e.g. single-cylinder engines
02Engines characterised by their cycles, e.g. six-stroke
CPC
F01M 1/04
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
MLUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
1Pressure lubrication
04using pressure in working cylinder or crankcase to operate lubricant feeding devices
F01M 11/065
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
MLUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
11Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
06Means for keeping lubricant level constant or for accommodating movement or position of machines or engines
062Accommodating movement or position of machines or engines, e.g. dry sumps
065Position
F01M 2011/026
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
MLUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
11Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
02Arrangements of lubricant conduits
026for lubricating crankshaft bearings
F01M 3/00
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
MLUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
3Lubrication specially adapted for engines with crankcase compression of fuel-air mixture or for other engines in which lubricant is contained in fuel, combustion air, or fuel-air mixture
F02B 2075/025
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
75Other engines
02Engines characterised by their cycles, e.g. six-stroke
022having less than six strokes per cycle
025two
F02B 2075/027
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
75Other engines
02Engines characterised by their cycles, e.g. six-stroke
022having less than six strokes per cycle
027four
Applicants
  • AKTIEBOLAGET ELECTROLUX [SE]/[SE] (AllExceptUS)
  • EMANUELSSON, Lennart [SE]/[SE] (UsOnly)
  • GUNNARSSON, Peter [SE]/[SE] (UsOnly)
  • OLLAS, Esbjörn [SE]/[SE] (UsOnly)
  • ARONSSON, Tore [SE]/[SE] (UsOnly)
Inventors
  • EMANUELSSON, Lennart
  • GUNNARSSON, Peter
  • OLLAS, Esbjörn
  • ARONSSON, Tore
Agents
  • ANDERSSON, Lars
Priority Data
PCT/SE02/0017530.01.2002SE
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) A CRANKCASE SCAVENGED FOUR−STROKE ENGINE
(FR) MOTEUR QUATRE TEMPS A CARTER BALAYE
Abstract
(EN)
A carnkcase scavenged and lubricated four−stroke engine (1) comprising especially: a mixture−preparation device (15) for supplying an air−fuel−lubricant mixture; an intake channel (16) connecting to the crankcase or cylinder to supply at least air (13) to the crankcase volume (12); an overflow channel (17) conncting to the crankcase or cylinder and to the intake opening (7) with intake valve (8) to supply to the intake at least air and lubricant from the crankcase volume; a valve drive assembly (18) driven by a crankshaft (4) for actuating the intake valve (8) and the exhaust valve (10); a valve drive assembly housing (19, 20, 21, 21', 22) comprising one or more sections (19, 20, 21, 21', 22) which is/are separate from the crankcase but in communication exclusively with the crankcase volume via at least one small size passage (23, 24, 25, 26, 27), and each section (19, 20, 21, 21', 22) of the valve drive assembly housing has a lowest part situated higher in the axial direction of the cylinder bore, i.e. closer to the combustion chamber, than the lowest part of the crankcase.
(FR)
L'invention concerne un moteur quatre temps (1) à carter lubrifié et balayé comprenant essentiellement: un dispositif de préparation de mélange (15) destiné à distribuer un mélange air-carburant-lubrifiant; une tubulure d'entrée (16) reliée au cylindre ou au carter afin d'alimenter au moins en air (13) le volume du carter (12); un tubulure de refoulement (17) reliant le carter ou le cylindre avec l'orifice d'admission (7) et avec la soupape d'admission (8) afin d'alimenter l'admission au moins en air et en lubrifiant provenant du volume du carter; un assemblage d'entraînement de soupape (18) commandé par un vilebrequin (4) destiné à actionner la soupape d'admission (8) et la soupape d'échappement (10); un compartiment d'assemblage d'entraînement de soupape (19, 20, 21, 21', 22) comprenant une ou plusieurs sections (19, 20, 21, 21', 22) qui sont séparées du carter mais en communication exclusivement avec le volume du carter via au moins un passage de petite taille (23, 24, 25, 26, 27), chaque section (19, 20, 21, 21', 22) du compartiment d'assemblage d'entraînement de soupape comportant une partie inférieure située plus haut dans la direction axiale de l'alésage du cylindre, c'est à dire plus près de la chambre de combustion, que la partie la plus basse du carter.
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