WO2007026910A1 - Bloc-cylindres et moteur a combustion interne multicylindre a cycle a deux temps equipe de celui-ci - Google Patents

Bloc-cylindres et moteur a combustion interne multicylindre a cycle a deux temps equipe de celui-ci Download PDF

Info

Publication number
WO2007026910A1
WO2007026910A1 PCT/JP2006/317400 JP2006317400W WO2007026910A1 WO 2007026910 A1 WO2007026910 A1 WO 2007026910A1 JP 2006317400 W JP2006317400 W JP 2006317400W WO 2007026910 A1 WO2007026910 A1 WO 2007026910A1
Authority
WO
WIPO (PCT)
Prior art keywords
scavenging
cylinder
cylinder block
combustion engine
internal combustion
Prior art date
Application number
PCT/JP2006/317400
Other languages
English (en)
Japanese (ja)
Inventor
Hisato Hori
Ichirou Fujimura
Original Assignee
Daihatsu Motor Co., 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 Daihatsu Motor Co., Ltd. filed Critical Daihatsu Motor Co., Ltd.
Publication of WO2007026910A1 publication Critical patent/WO2007026910A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/0002—Cylinder arrangements
    • F02F7/0007—Crankcases of engines with cylinders in line
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/02—Arrangements of lubricant conduits
    • 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
    • F02B25/02—Engines characterised by using fresh charge for scavenging cylinders using unidirectional scavenging
    • F02B25/04—Engines having ports both in cylinder head and in cylinder wall near bottom of 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
    • F02B25/00—Engines characterised by using fresh charge for scavenging cylinders
    • F02B25/14—Engines characterised by using fresh charge for scavenging cylinders using reverse-flow scavenging, e.g. with both outlet and inlet ports arranged near bottom of piston stroke
    • F02B25/16—Engines characterised by using fresh charge for scavenging cylinders using reverse-flow scavenging, e.g. with both outlet and inlet ports arranged near bottom of piston stroke the charge flowing upward essentially along cylinder wall opposite the inlet ports
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/02—Arrangements of lubricant conduits
    • F01M2011/023—Arrangements of lubricant conduits between oil sump and cylinder head
    • 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

Definitions

  • TECHNICAL FIELD The present invention relates to a two-cycle multi-cylinder internal combustion engine comprising a plurality of cylinders among a cylinder block and a two-cycle internal combustion engine. It is about the institution.
  • Patent Document 1 as a prior art describes a cycle type multi-cylinder internal combustion engine having a plurality of cylinders.
  • a plurality of cylinders are arranged in a cylinder block side by side in the crankshaft direction, and a scavenging port into the cylinder is provided at a plurality of locations in the circumferential direction in each cylinder.
  • the cylinder block has a scavenging chamber for distributing the intake air (scavenging) compressed by the scavenging pump to each of the scavenging ports in each cylinder. It is the structure of providing so that it may surround. Moreover, in this two-cycle multi-cylinder internal combustion engine, a scavenging inlet from the scavenging pump to the scavenging chamber is provided on one long side surface of the left and right long side surfaces that are flat with the crankshaft axis in the cylinder block. I have to. Patent Document 1: Japanese Laid-Open Patent Publication No.
  • an oil drop passage provided in the cylinder block for guiding the lubricating oil in the cylinder head at the top of the cylinder block to the oil pan at the bottom of the cylinder block, the oil drop passage being the scavenging air.
  • it In order not to impair the flow of intake air in the room, it must be configured to be arranged outside the scavenging chamber. In other words, the configuration of the prior art leads to an increase in the size of the scavenging chamber.
  • an oil drop passage is provided outside the scavenging chamber, which increases the size of the cylinder block, which in turn increases the overall size of the internal combustion engine and increases the weight.
  • Multiple cylinders arranged in the first direction, and each cylinder has multiple scavenging ports in its circumferential direction.
  • a scavenging chamber in communication with the plurality of scavenging ports of each cylinder;
  • a scavenging inlet for introducing scavenging air from a scavenging pump into the scavenging chamber
  • the scavenging chamber is opposed to each other across the plurality of cylinders, and includes a first scavenging chamber and a second scavenging chamber extending in a first direction,
  • the scavenging inlet is provided at an end portion in the first direction of the cylinder block, and communicates with the first scavenging chamber and the second scavenging chamber via a branch portion, respectively, and the plurality of cylinders and the branch portion are connected to each other.
  • An oil dropping passage extending in the second direction perpendicular to the first direction is provided in between. It is characterized by that. Further, claim 2 of the present invention is
  • claim 3 of the present invention is
  • a two-cycle multi-cylinder internal combustion engine comprising: a cylinder block according to claim 2; and a retainer for supporting an oil seal with respect to a crankshaft, provided in a part of the transmission case.
  • Retainer An oil passage is provided so as to bypass the rank shaft, and the oil dropping passage communicates with the oil pan through the oil passage.
  • a two-cycle multi-cylinder internal combustion engine according to claim 3, wherein the two-cycle multi-cylinder internal combustion engine is a unit type.”
  • the intake air (scavenging) from the scavenging pump first reaches the scavenging inlet and is branched and distributed from the scavenging inlet to both scavenging chambers. Branching toward both scavenging chambers extending in one direction, and flowing in both scavenging chambers in the direction of the crankshaft, is distributed to each scavenging port in each cylinder.
  • the lubricating oil in the cylinder head is returned to the oil pan through the oil passage provided in the retainer from the oil dropping passage provided in the cylinder block.
  • a scavenging chamber for each scavenging point in each cylinder is formed in two scavenging chambers extending in the crankshaft direction on both the left and right sides of the row in each cylinder, while the scavenging inlet is provided in the cylinder block. It is provided at one of the two ends in the direction of the crank axis, and this scavenging inlet is branched to communicate with both scavenging chambers, so that intake air from one scavenging inlet is sent to each cylinder.
  • each scavenging port can be evenly distributed through two scavenging chambers extending in the direction of the cylinder row, the internal volume in the scavenging chamber can be reduced as compared with the prior art.
  • the oil drop passage from the cylinder head is arranged inside the branch portion from the scavenging inlet to both scavenging chambers, the space inside the branch portion can be used for forming the oil drop passage.
  • the cylinder block in combination with the reduction of the internal volume in the scavenging chamber, the cylinder block can be made smaller and lighter, and thus the overall internal combustion engine can be made smaller and lighter.
  • the lower end of the oil drop passage is located in the transmission case, and the lower end communicates with the oil pan through an oil passage provided in the retainer so as to bypass the crankshaft. Since it is possible to avoid opening an oil drop passage at the output end face of the cylinder block where the transmission case is joined, the lubricating oil in the cylinder head should be returned to the oil pan while bypassing the crankshaft. Therefore, it is possible to reliably prevent the strength at the joint portion of the output mission case with respect to the cylinder opening from being lowered.
  • the scavenging inlet is integrated into the upper end of the mission case on one end face on the output side of the cylinder block so as to protrude from the one end face.
  • FIG. 1 is a partially cutaway side view showing an internal combustion engine according to an embodiment of the present invention.
  • FIG. 2 is a cross-sectional view taken along the line II-II in FIG.
  • FIG. 3 is a cross-sectional view taken along the line I I I -I I I of FIG.
  • FIG. 4 is a sectional view taken along line IV-IV in FIG. BEST MODE FOR CARRYING OUT THE INVENTION
  • reference numeral 1 denotes a cylinder block.
  • the cylinder block 1 has a cylinder head 2 force on its upper surface and an oil van 3 on its lower surface.
  • two cylinders 4 are arranged side by side in the axial direction of the crankshaft 5, and each cylinder 4 contains a piston 6 that reciprocates in conjunction with the rotation of the crankshaft 5.
  • Each cylinder 4 is provided with scavenging ports 7 that are opened and closed by reciprocating movement of the piston 6 inside the cylinder 4 at a plurality of positions in the circumferential direction.
  • two scavenging chambers 8 and 9 extending in the direction of the crankshaft 5 are formed on the left and right sides of the row in each cylinder 4, and the cooling water jacket 10 is It is formed so as to surround each cylinder 4.
  • a mission case 11 with a built-in output mission (not shown) is fastened to the output side end face 1 a of the left and right end faces in the direction of the crankshaft 5 in the cylinder block 1.
  • a retainer 13 that supports an oil seal 12 fitted to the crankshaft 5 is joined to a portion of the side end face 1 a in the transmission case 11.
  • An inlet header 14 is integrally provided on the output side end face 1 a of the cylinder block 1 above the transmission case 11 1 so as to protrude from the end face 1 a.
  • a scavenging inlet 15 from a scavenging pump (not shown) is provided on the upper surface of the inlet header 14, and the inlet header 14 is connected to one of the scavenging chambers 8 and 9 as shown in plan view of FIG. Bifurcated into a communication path 14a to the other scavenging chamber 8 and a communication path 14b to the other scavenging chamber 9.
  • a valve mechanism chamber (not shown) in the upper surface of the cylinder head 2 inside the portion of the cylinder block 1 that branches from the inlet header 14 to the both communication passages 14 a, 14 b
  • the oil drop passage 1 6 from the An oil passage 1 is formed so as to extend in the vertical direction, and its lower end 16 a is located in the mission case 11 1, while the retainer 13 is extended to bypass the crankshaft 5. 7 is provided so that the oil dropping passage 16 communicates with the oil pan 3 through the oil passage 17.
  • intake air (scavenging) from the scavenging pump first reaches the inlet header 14 from the scavenging inlet 15, and then enters both scavenging chambers 8, 9 extending in the crankshaft direction on both the left and right sides of the cylinder row.
  • the gas flows into the two scavenging chambers 8 and 9 in the direction of the crankshaft, and is distributed to each scavenging port 7 in each cylinder 4.
  • the lubricating oil in the valve mechanism in the front cylinder head 2 is returned to the oil pan 3 from the oil drop passage 16 provided in the cylinder block 1 through the oil passage 17 provided in the retainer 13.
  • a scavenging chamber for each scavenging port 7 in each cylinder 4 is formed in two scavenging chambers 8 and 9 extending in the crankshaft direction on both the left and right sides of the row in each cylinder, while the scavenging inlet 15 is By providing the cylinder block 1 at one of the ends in the crank axis direction and branching the scavenging inlet 15 to communicate with the scavenging chambers 8 and 9, one scavenging The intake air from the inlet 15 can be evenly distributed to each scavenging port 7 in each cylinder 4 through two scavenging chambers 8 and 9 extending in the direction of the cylinder row.
  • the oil drop passage 16 from the valve mechanism chamber in the cylinder head 2 is disposed inside the branch portion from the scavenging inlet 15 to both the scavenging chambers 8 and 9, so that the branch portion The wasted space inside can be used to form the oil drop passage 16.
  • the lower end 16 a of the oil drop passage 16 is located in the mission case 11, and the lower end 16 a is provided so as to bypass the crankshaft 5 in the retainer 13.
  • an oil dropping passage is opened at a portion of the output side end face 1 a of the cylinder block 1 where the transmission case 11 is joined. It can be avoided.
  • an inlet header 14 with a scavenging inlet 15 is projected from the end face 1 a to the upper part of the mission case 1 1 in the output end face 1 a of the cylinder block 1.
  • the inlet header 14 having the scavenging inlet 15 can overlap the mission case 11 in the crankshaft direction.
  • the present embodiment is a case of a Uniflow type two-cycle internal combustion engine in which only the scavenging port 7 is provided for the cylinder 4, the present invention is not limited to this and the scavenging is performed for the cylinder. Needless to say, the present invention can be applied to a two-cycle internal combustion engine of a loop or a cross flow type in which an exhaust port is provided in addition to a port.
  • Cylinder head of the present invention and two-cycle multi-cylinder internal combustion engine equipped with the same Seki has an oil drop passage from the cylinder head disposed inside the branch from the scavenging inlet to both scavenging chambers, so that the space inside the branch can be used to form an oil drop passage. Therefore, in combination with the reduction of the internal volume in the scavenging chamber, the cylinder block can be made smaller and lighter, and thus the overall internal combustion engine can be made smaller and lighter.

Landscapes

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

Abstract

Deux chambres de balayage (8, 9) se prolongeant dans la direction d’un axe de vilebrequin sont formées du côté gauche et du côté droit d’une rangée de cylindres. Un orifice d’admission de balayage (15) ménagé à une extrémité d’un bloc-cylindres est raccordé par embranchement aux deux chambres de balayage. Un chemin (16) d’évacuation d’huile d’une culasse est en outre ménagé dans le bloc-cylindres, à l’intérieur d’une partie d’embranchement au niveau de laquelle l’orifice d’admission de balayage se raccorde par embranchement aux deux chambres de balayage.
PCT/JP2006/317400 2005-08-30 2006-08-29 Bloc-cylindres et moteur a combustion interne multicylindre a cycle a deux temps equipe de celui-ci WO2007026910A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2005-249160 2005-08-30
JP2005249160A JP2007064054A (ja) 2005-08-30 2005-08-30 二サイクル式多気筒内燃機関

Publications (1)

Publication Number Publication Date
WO2007026910A1 true WO2007026910A1 (fr) 2007-03-08

Family

ID=37808994

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2006/317400 WO2007026910A1 (fr) 2005-08-30 2006-08-29 Bloc-cylindres et moteur a combustion interne multicylindre a cycle a deux temps equipe de celui-ci

Country Status (2)

Country Link
JP (1) JP2007064054A (fr)
WO (1) WO2007026910A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102979643A (zh) * 2012-12-07 2013-03-20 力帆实业(集团)股份有限公司 一种降低机油损耗的曲轴箱组合
US10253027B2 (en) 2013-07-08 2019-04-09 Bristol-Myers Squibb Company Aryl lactam kinase inhibitors

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06159067A (ja) * 1992-11-26 1994-06-07 Mazda Motor Corp ユニフロー式２サイクルエンジン
JPH0868357A (ja) * 1994-06-21 1996-03-12 Daihatsu Motor Co Ltd ２サイクルエンジンの掃気装置
JP2000282827A (ja) * 1999-03-29 2000-10-10 Suzuki Motor Corp エンジンのオイル通路構造

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06159067A (ja) * 1992-11-26 1994-06-07 Mazda Motor Corp ユニフロー式２サイクルエンジン
JPH0868357A (ja) * 1994-06-21 1996-03-12 Daihatsu Motor Co Ltd ２サイクルエンジンの掃気装置
JP2000282827A (ja) * 1999-03-29 2000-10-10 Suzuki Motor Corp エンジンのオイル通路構造

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102979643A (zh) * 2012-12-07 2013-03-20 力帆实业(集团)股份有限公司 一种降低机油损耗的曲轴箱组合
US10253027B2 (en) 2013-07-08 2019-04-09 Bristol-Myers Squibb Company Aryl lactam kinase inhibitors

Also Published As

Publication number Publication date
JP2007064054A (ja) 2007-03-15

Similar Documents

Publication Publication Date Title
US6257178B1 (en) Internal combustion engine for a motorcycle
JP4657134B2 (ja) ４サイクル空油冷エンジンにおけるオイル通路構造
RU2541084C2 (ru) Двигатель с турбонаддувом и рециркуляцией выхлопных газов
JP6476796B2 (ja) 多気筒エンジンの冷却用オイル通路構造
US9938881B2 (en) Cooling water passage structure of internal combustion engine
CN107524538B (zh) 内燃机
US20100077999A1 (en) Internal combustion engine
US20070251227A1 (en) Water-cooled internal combustion engine
US4369627A (en) Internal combustion engine
JP2009203935A (ja) Ｖ型エンジンの冷却装置
US20160312683A1 (en) Outboard motor
WO2007026910A1 (fr) Bloc-cylindres et moteur a combustion interne multicylindre a cycle a deux temps equipe de celui-ci
US20120031355A1 (en) Engine including partial integrated intake manifold
JPWO2019066089A1 (ja) シリンダヘッド
US8627790B2 (en) W6-motor
US8495993B2 (en) Engine including crankcase ventilation system oil drain features
JP6079405B2 (ja) 車両用エンジンの排気ガス還流装置
JP2015086787A (ja) 内燃機関
US20060037311A1 (en) Secondary air supply for engine exhaust system
EP3315736B1 (fr) Moteur endothermique à système de distribution amélioré
JP2017082634A (ja) エンジンの潤滑構造及び自動二輪車
US8943797B2 (en) Cylinder head with symmetric intake and exhaust passages
JPH0566219U (ja) エンジンにおけるシリンダブロックの冷却装置
JP2007283894A (ja) 船外機用多気筒エンジン
JP6971291B2 (ja) 多気筒内燃機関

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application
NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 06797327

Country of ref document: EP

Kind code of ref document: A1