JPS6196112A - Device for altering valve timing in 4-cycle engine - Google Patents

Device for altering valve timing in 4-cycle engine

Info

Publication number
JPS6196112A
JPS6196112A JP59216522A JP21652284A JPS6196112A JP S6196112 A JPS6196112 A JP S6196112A JP 59216522 A JP59216522 A JP 59216522A JP 21652284 A JP21652284 A JP 21652284A JP S6196112 A JPS6196112 A JP S6196112A
Authority
JP
Japan
Prior art keywords
cam
helical gear
idle
engine
rpm
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
JP59216522A
Other languages
Japanese (ja)
Inventor
Hiroshi Wakayama
若山　博司
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.)
Suzuki Motor Corp
Original Assignee
Suzuki Motor Corp
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 Suzuki Motor Corp filed Critical Suzuki Motor Corp
Priority to JP59216522A priority Critical patent/JPS6196112A/en
Publication of JPS6196112A publication Critical patent/JPS6196112A/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
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
    • F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/34403—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using helically teethed sleeve or gear moving axially between crankshaft and camshaft
    • 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
    • F02B2075/027—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle four
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Abstract

PURPOSE:To provide the captioned device having high performance from a low to high speed by providing an idle helical gear and a cam helical gear, and moving the cam helical gear axially with an increase of the rpm of an engine to advance the cam shaft. CONSTITUTION:An idle helical gear 2 is rotated, whereby suction and exhaust cam shafts 3, 4 are rotated via two cam helical gears 7, 8 for opening and closing a pumping valve. Moving the two cam helical gears 7, 8 axially along splines 5, 6 with the aid of slide pieces in conformity with an increase of the rpm of the engine, the suction and exhaust cam shafts 3, 4 are advanced with respect to the idel helical gear 2 by a fraction of helicity of the idle helical gear 2 and the helical gears 7, 8. Accordingly, fuel cost can be improved at a low rpm of the engine by assuring reduced blow-off thereof, while a high output can be provided at high rpm thereof by advancing the cam shafts.

Description

【発明の詳細な説明】 〔発明の技術分野〕 この発明は、４サイクルエンジンのバルブタイミング可
変装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a variable valve timing device for a four-stroke engine.

〔発明の技術的背景と問題点〕[Technical background and problems of the invention]

４サイクルエンジンでは、クランクシャフトにカムシャ
フトを連動さけ“、カムシャフトのカムの回転によって
ロッカーアームを介して吸気及び排気用の傘形のバルブ
をバネに抗して押下げて開ぎ、吸排気バルブを開閉して
いる。従って、吸排気バルブの開閉タイミングは、カム
シャフトのカムの形状によって定まる。高回転高出力型
のエンジンにしようとすると、吸気及び排気の流れが遅
れてもよいようにするため、バルブタイミングは、進曹 角したものにｂる。これを低速で使用すると、バルブの
オーバーラツプのために吸気の吹扱けが起って、燃料消
費が増したり、トルク不足が発生し、吹抜けのために排
気ガス中の８０１１度が増す不都合がある。ロッカーア
ームをエンジン回転に伴って移動させ、バルブタイミン
グを可変するものがあるが、ＩＭ造が複雑で、製造コス
トが轟くつく不都合がある。In a 4-stroke engine, the camshaft is linked to the crankshaft, and the rotation of the cam on the camshaft pushes down and opens the umbrella-shaped intake and exhaust valves via the rocker arm against a spring. The valves open and close.Therefore, the opening and closing timing of the intake and exhaust valves is determined by the shape of the cam of the camshaft.When building a high-speed, high-output engine, it is necessary to make sure that the flow of intake and exhaust air is delayed. Therefore, the valve timing should be set at an advanced angle.If this is used at low speeds, the intake air will be blown due to valve overlap, resulting in increased fuel consumption and a lack of torque. There is an inconvenience that the 8011 degrees in the exhaust gas increases due to blow-through.There are some that move the rocker arm as the engine rotates to vary the valve timing, but the IM construction is complicated and the manufacturing cost is high. be.

〔発明の目的〕[Purpose of the invention]

この発明は、かかる点に鑑み、アイドルへリカルギャー
とカムへリカル−１ニヤーを設けて、カムへりカルギヤ
ーを回転数の上界に伴って軸方向に移動させて、カムシ
ャフトを進角さけ、回転数に合ったバルブタイミングに
して、低速から高速まで高性能の４ザイクルエンジンの
バルブタイミング可変装置を得ることを目的とする。In view of the above, this invention provides a logical gear to the idle and a logical-1 near to the cam, and moves the cam peripheral gear in the axial direction as the upper limit of the rotational speed increases, thereby advancing the camshaft and rotating it. The purpose of the present invention is to obtain a variable valve timing device for a 4-cycle engine with high performance from low speed to high speed by adjusting the valve timing to match the engine speed.

〔発明の構成〕[Structure of the invention]

以下本発明を図面に示す実施例について説明する。 The present invention will be described below with reference to embodiments shown in the drawings.

クランクシャフトに連動させたチェノ１等によって、ア
イドルへりカルギヤー２を駆動回転させる。吸気用カム
シャフト３と、排気用カムシャフト４には、各々スプラ
イン５．６を設けて、各々カムへりカルギヤー７．８を
軸方向摺動可能に装着する。２つのカムへリカルギャ−
７，８は、アイドルへりカルギヤー２に噛合させる。２
つのカムギヤー７．８には、各々スライドピース９゜１
０を跨がせて取付けである。スライドピース９゜１０は
、回転数に応じて可動するガバナー又は、回転数に応じ
た油圧で動く油圧シリンダーのロッド１１．１２に連結
する。吸気用カムシャフト３及び排気用カムシャフト４
には、各々カム１３が設け−てあり、回転によってロッ
カーアームを介して、吸気用及び排気用の傘形のバルブ
をバネを抗して押下げて開閉するようになっている。The idle helical gear 2 is driven and rotated by a chino 1 etc. linked to the crankshaft. The intake camshaft 3 and the exhaust camshaft 4 are each provided with a spline 5.6, and a cam helical gear 7.8 is attached to each of them so as to be slidable in the axial direction. Two cam helical gear
7 and 8 are made to mesh with the idle helical gear 2. 2
Each of the two cam gears 7.8 has a slide piece 9°1.
It is installed by straddling 0. The slide pieces 9 and 10 are connected to rods 11 and 12 of a governor that moves depending on the number of rotations or a hydraulic cylinder that moves with hydraulic pressure depending on the number of rotations. Intake camshaft 3 and exhaust camshaft 4
Each of the cams 13 is provided with a cam 13, and when rotated, the umbrella-shaped intake and exhaust valves are pushed down against a spring to open and close via a rocker arm.

しかして、エンジンが回転するとアイドルへりカルギヤ
ー２が回転し、２つのカムヘリカルギヤー７．８を回転
して、吸気用カムシャフト３及び排気用カムシャフト４
を回転させて、吸排気バルブを開閉する。エンジン回転
の上昇に伴って、スライドピース９，１０で、２つのカ
ムヘリカルギヤー７．８を、スプライン５．６に沿って
軸方向に移動させると、アイドルへりカルギヤー２、と
カムへりカルギヤー７．８のヘリカルになった分だけ、
アイドルへりカルギヤー２に対し、吸気用カムシャフト
３と排気用カムシャフト４が進角する。従って、低速で
は吹抜けを少なくして燃費を向上させＨＣ濃度も少なく
、高トルクになり、高　　　速では進角して高出力にで
きる。When the engine rotates, the idle helical gear 2 rotates, which rotates the two cam helical gears 7 and 8, causing the intake camshaft 3 and the exhaust camshaft 4 to rotate.
Rotate to open and close the intake and exhaust valves. As the engine speed increases, the two cam helical gears 7.8 are moved axially along the spline 5.6 by the slide pieces 9, 10, and the idle helical gear 2 and the cam helical gear 7.8 are moved axially along the spline 5.6. As much as 8 helical,
The intake camshaft 3 and the exhaust camshaft 4 are advanced relative to the idle helical gear 2. Therefore, at low speeds, blow-through can be reduced to improve fuel efficiency, HC concentration is low, and high torque can be achieved, and at high speeds, the engine can be advanced to achieve high output.

〔発明の効果］ 以上説明したように、この発明は、クランクシャフトに
連動するアイドルへりカルギヤーを設け、吸気用カムシ
ャフトと排気用カムシャフトに各々スプライン嵌合した
２つのカムヘリカルギヤーをアイドルへりカルギヤーに
噛合させ、２つのカムヘリカルギヤーを各々スライドピ
ースによって回転数に応じて軸方向に摺動させるように
したので、回転数の上昇に伴って、カムタイミングを進
角させることができて、低速から高速まで高性能にでき
る。そして、２つのカムへりカルギヤーの軸方向移動に
よって進角させるので、構造も堅固にできて、耐久性の
高いものにできる。[Effects of the Invention] As explained above, the present invention provides an idle helical gear that is interlocked with the crankshaft, and connects two cam helical gears spline-fitted to the intake camshaft and the exhaust camshaft as the idle helical gear. Since the two cam helical gears are made to slide in the axial direction according to the rotational speed by each slide piece, the cam timing can be advanced as the rotational speed increases, and the cam timing can be advanced at low speeds. It can achieve high performance from high speed to high speed. Since the angle is advanced by moving the two cam helical gears in the axial direction, the structure can be made solid and highly durable.

【図面の簡単な説明】[Brief explanation of the drawing]

図は、本発明の一実施例を示し、第１図は平面図、第２
図は側面図である。 ２・・・アイドルへりカルギヤー、３・・・吸気用カム
シャフト、４・・・拮気用力ムシレフト、５．６・・・
スプライン、７．８・・・カムヘリカルギヤー、９゜１
０・・・スライドピース。The figures show one embodiment of the present invention, with the first figure being a plan view and the second figure being a plan view.
The figure is a side view. 2...Idle helical gear, 3...Intake camshaft, 4...Antagonism force lever left, 5.6...
Spline, 7.8...Cam helical gear, 9゜1
0...Slide piece.

Claims (1)

【特許請求の範囲】[Claims] クランクシャフトに連動するアイドルヘリカルギヤーを
設け、吸気用カムシャフトと排気用カムシャフトに各々
スプライン嵌合した二つのカムヘリカルギヤーをアイド
ルヘリカルギヤーに噛合させ、２つのカムヘリカルギヤ
ーを各々スライドピースによって回転数に応じて軸方向
に摺動させるようにしたことを特徴とする４サイクルエ
ンジンのバルブタイミング可変装置。An idle helical gear linked to the crankshaft is provided, two cam helical gears spline-fitted to the intake camshaft and exhaust camshaft are meshed with the idle helical gear, and the two cam helical gears are each rotated by a slide piece. A variable valve timing device for a four-stroke engine, characterized in that the variable valve timing device is configured to slide in the axial direction depending on the number of valves.
JP59216522A 1984-10-16 1984-10-16 Device for altering valve timing in 4-cycle engine Pending JPS6196112A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59216522A JPS6196112A (en) 1984-10-16 1984-10-16 Device for altering valve timing in 4-cycle engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59216522A JPS6196112A (en) 1984-10-16 1984-10-16 Device for altering valve timing in 4-cycle engine

Publications (1)

Publication Number Publication Date
JPS6196112A true JPS6196112A (en) 1986-05-14

Family

ID=16689746

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59216522A Pending JPS6196112A (en) 1984-10-16 1984-10-16 Device for altering valve timing in 4-cycle engine

Country Status (1)

Country Link
JP (1) JPS6196112A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5074260A (en) * 1989-04-27 1991-12-24 Honda Giken Kogyo Kabushiki Kaisha Valve driving device and valve driving method for internal combustion engine
JPH08158824A (en) * 1994-11-30 1996-06-18 Musashi Seimitsu Ind Co Ltd Variable valve timing mechanism for internal combustion engine
US5615648A (en) * 1992-07-25 1997-04-01 Robert Bosch Gmbh Electro-hydraulic adjusting device
JP2015178816A (en) * 2014-03-19 2015-10-08 本田技研工業株式会社 internal combustion engine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5074260A (en) * 1989-04-27 1991-12-24 Honda Giken Kogyo Kabushiki Kaisha Valve driving device and valve driving method for internal combustion engine
US5615648A (en) * 1992-07-25 1997-04-01 Robert Bosch Gmbh Electro-hydraulic adjusting device
JPH08158824A (en) * 1994-11-30 1996-06-18 Musashi Seimitsu Ind Co Ltd Variable valve timing mechanism for internal combustion engine
JP2015178816A (en) * 2014-03-19 2015-10-08 本田技研工業株式会社 internal combustion engine

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