CN100393987C - Air valve driver for IC engine - Google Patents

Air valve driver for IC engine Download PDF

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Publication number
CN100393987C
CN100393987C CN 200310121438 CN200310121438A CN100393987C CN 100393987 C CN100393987 C CN 100393987C CN 200310121438 CN200310121438 CN 200310121438 CN 200310121438 A CN200310121438 A CN 200310121438A CN 100393987 C CN100393987 C CN 100393987C
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roller
arm
follower
low
lift cam
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CN 200310121438
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Chinese (zh)
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CN1514114A (en )
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冈俊彦
德久胜规
长野修治
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三菱自动车工业株式会社;三菱自动车工程株式会社
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Abstract

在具有第一摇臂、第二摇臂及第三摇臂,并通过压力油的供给、释放进行第一进气门及第二进气门的开闭用的驱动凸轮的切换的机构中,第三摇臂的第三滚子从动件形成为内滚子与外滚子的双环状滑动滚子,提高冲击强度,使相对于旋转的第二低提升凸轮的第三摇臂的靠接部成为对刚性加以考虑的结构,第二滚子从动件相对于高提升凸轮来说,作为滚针滚子,减少摩擦,是对旋转阻力可加以考虑的结构。 Having a first arm, second arm and third arm, and by supplying pressurized oil to release a first intake valve and the second intake valve opening and closing of the switching mechanism with the drive cam, the third arm of the third roller follower roller bicyclic formed within the outer sub-roller sliding roller, to improve the impact strength, the phase rotation of the third arm to the second of the low lift cam against portions become to be considered a rigid structure, the second follower roller with respect to the high-lift cam is, as a needle roller to reduce friction, is the rotational resistance can be considered a structure. 如果第一低提升凸轮与第一滚子从动件的间隔在第二低提升凸轮与第三滚子从动件的间隔的一半以下,则第一滚子从动件选择使用滚针滚子,否则第一滚子从动件选择使用双环状滑动滚子。 If the interval between the first low lift cam follower and the first roller in the second half interval of the low lift cam follower of the third following roller, the first roller follower choose needle roller otherwise, the first follower roller choose bicyclic sliding roller.

Description

内燃机的气门驱动装置 A valve driving apparatus of an internal combustion engine

技术领域 FIELD

本发明涉及能以不同的驱动定时开闭地驱动内燃机的进气门或排气门的内燃机的气门驱动装置。 The present invention relates to a closing timing of the internal combustion engine driven at different drive the intake valve or exhaust valve of an internal combustion engine valve drive means.

背景技术 Background technique

近年来,开发了一种根据发动机的负载状态或速度状态,以最佳方式切换设置在往复运动式内燃机(发动机)中的进气门或排气门(内燃机气门)的工作特性即、开闭定时或开放期间的气门驱动装置。 In recent years, the intake or exhaust valves (engine valves) Characteristics of a work in accordance with the load state or the speed state of the engine, provided the best mode switching reciprocating internal combustion engine (engine), i.e. in the opening and closing or during a valve open timing of the driving means.

在这种气门驱动装置中,作为切换工作特性的机构的一种,开发了例如根据发动机的旋转状态,有选择地使用备有适于发动机低速旋转时的凸轮轮廓的低速用凸轮和备有适于发动机高速旋转时的凸轮轮廓的高速用凸轮,使进行内燃机气门开闭地动作的技术。 In such a valve driving apparatus, as a mechanism of switchable operating characteristics, for example, developed in accordance with the rotation state of the engine are selectively used with the low speed cam profile at low engine speed of rotation and adapted with appropriate in the high-speed cam profile of the high-speed rotation of the engine when the engine valve for opening and closing the technical operation.

例如,在专利文献l、专利文献2中,揭示了这样一种技术,其备有通过低速用凸轮摆动并驱动内燃机阀的驱动摇臂;和借助于具有包含低速用凸轮的凸轮轮廓的高速用凸轮摆动的高速摇臂;及用于切换驱动摇臂与高速摇臂的连接状态及断开状态的连接切换机构。 For example, in Patent Document L, Patent Document 2 discloses a technique, which is provided with the swing cam and driven by a low speed of an engine valve driving rocker arm; and by means of a high speed cam profile of the cam comprises a low speed swing cam speed rocker arm; and a connection switching mechanism for switching the connection state of the high-speed rocker arm and the driving rocker arm and the OFF state.

专利文献l:特开昭63 — 170513号公报; Patent Literature l: Laid-Open Sho 63 - Publication No. 170,513;

专利文献2:特开2001—41017号公报。 Patent Document 2: Laid-Open Patent Publication No. 2001-41017.

在以往技术中,借助于连接切换机构使驱动摇臂与高速摇臂处于断开状态时,高速摇臂自由地摆动,驱动摇臂通过低速用凸轮摆动,以对应于低速用凸轮的凸轮轮廓的特性,使内燃机气门动作。 In the conventional art, by means of a switching mechanism connected to drive the high-speed rocker arm and the rocker arm is in an off state, a high speed rocker arms are free to swing rocker arm driven by a low-speed cam, corresponding to the cam profile of the low speed cam characteristics of the internal combustion engine valve event.

另一方面,当借助于连接切换机构使驱动摇臂与高速摇臂处于连接状态时,高速摇臂与驱动摇臂一体摆动,驱动摇臂以对应于高速用凸轮的凸轮轮廓的特性,使内燃机气门动作。 On the other hand, when the switching mechanism is connected by means of a driving rocker arm and the high-speed rocker arm in the connected state, the high-speed rocker arm and the driving rocker arm is integrally pivot, the rocker arm corresponding to the driving characteristics of the cam profile of the high speed cam, the internal combustion engine valve operation.

在以往的气门驱动装置中,在驱动摇臂与高速摇臂处于连接状态并使内燃机阀动作时,由于高速用凸轮具有包含低速用凸轮的凸轮轮廓, 所以,高速用凸轮的提升量大于低速用凸轮的提升量。 In the conventional valve-driving apparatus, the high-speed rocker arm and the driving rocker arms in the connected state and the engine valve operation, since the high speed cam having a cam profile of the cam comprises a low speed, therefore, enhance the capacity of the high speed cam at low speed the amount of lift cam. 因此,在低速用凸轮与驱动摇臂之间产生间隙的状态下运转。 Thus, the operation state of the gap between the low speed cam and the drive rocker arm.

由于驱动摇臂与高速摇臂始终被偏置于凸轮侧,因此,在该状态下, 通过连接切换机构使驱动摇臂与高速摇臂处于断开状态时,例如,由于在最大提升时,驱动摇臂与低速用凸轮的间隙最大,所以存在驱动摇臂处于叩击低速用凸轮的状态的可能性。 Due to the high-speed rocker arm and the driving rocker arm is always biased to the cam side, and therefore, in this state, the high-speed rocker arm and the driving rocker arm is connected in a disconnected state by the switching means, e.g., due to the maximum lift, drive low speed cam and the rocker arm clearance maximum, so the possibility of tapping the driving rocker arm is in a state of low speed cam is present. 从而,其现状是必须考虑驱动摇臂相对于旋转的低速用凸轮的靠接部的结构的刚性。 Thus, their status must be considered with respect to the rocker arm against the drive portion of the structure of the rigid rotation of the low speed cam.

发明内容 SUMMARY

本发明就是鉴于上述状况提出的,其目的是提供一种能使相对于旋转凸轮的摇臂的靠接部的支持部的刚性及阻力为最佳的内燃机的气门驱动装置。 The present invention has been made in view of the above, it is an object to provide a can with respect to the resistance against the rigid support portion and the contact portion of optimal engine valve rocker cam rotation driving means.

为了完成上述目的, To achieve the above object,

本发明的内燃机的气门驱动装置包括:摇臂轴;顶端与第一进气门 The variable valve driving apparatus according to the present invention comprising: a rocker shaft; the first intake valve to the top

或第一排气门连接,可自由摆动地支持在上述摇臂轴上,由第一低提升 Or the first exhaust valve connected swingably supported on said swing arm shaft, a first low lift

凸轮驱动的第一摇臂;顶端与第二进气门或第二排气门连接,可自由摆动地支持在上述摇臂轴上,由提升量小于上述第一低提升凸轮的第二低提升凸轮驱动的第三摇臂;设置有可与上述第一摇臂侧连接的顶端,可自由摆动地支持在上述摇臂轴上,由提升量大于上述第一低提升凸轮的高提升凸轮驱动的第二摇臂;设置在上述第一摇臂的基端侧,与凸轮轴的上述第一低提升凸轮靠接的第一滚子从动件;设置在上述第三摇臂的基端侧,与上述凸轮轴的第二低提升凸轮靠接的第三滚子从动件;设置在上述第二摇臂的基端侧,与上述凸轮轴的上述高提升凸轮靠接的第二滚子从动件;及用于切换上述第二摇臂相对于上述第一摇臂及第三摇臂的连接状态与断开状态的连接切换机构,上述第一滚子从动件与上述第二滚子从动件中的至少上述第二滚子从动件作为使用 A first cam driven rocker arm; and the second intake valve to the top or the second exhaust valve is connected, swingably supported above the rocker arm shaft, the lift amount is smaller than the first low lift cam lifting a second low a third cam driven rocker arms; may be provided with a tip connected to the first side of the rocker arm, swingably supported above the rocker shaft, by a high lift cam lift is greater than the first low lift cam drive a second rocker arm; provided at the base end side of the first arm, and the first low-lift cam of a camshaft follower roller against the first contact; provided at the base end of the third arm side, and second low lift cam on the camshaft of a third follower roller contact; provided at the base end side of the second arm, the camshaft and the high lift cam roller against the second contact from the movable member; and means for switching the second arm with respect to the connection switching mechanism connected state and disconnect the first rocker arm and the third arm, the first follower roller and the second roller the follower member at least the second roller follower as used 针轴承的滚针滚子形成,上述第三滚子从动件作为双环状滑动滚子形成,如果上述第一低提升凸轮与上述第一滚子从动件的间隔在上述第二低提升凸轮与上述第三滚子从动件的间隔的一半以下,则上述第一滚子从动件选择使用滚针滚子,如果上述第一低提升凸轮与上述第一滚子从动件的间隔在上述第二低提升凸轮与上述第三滚子从动件的间隔的一半以上,则上述第一滚子从动件选择使用双环状滑动滚子。 Needle roller bearings needle is formed, the third roller follower slide roller member is formed as a dual ring, if the first interval of the first low lift cam follower rollers in said second low lift half spacing and the third cam follower roller or less, the first follower roller choosing needle roller, if the first interval of the first low lift cam follower roller in the second and the third low lift cam follower rollers spaced more than half, the first follower roller choose bicyclic sliding roller.

因此,以提升量更小的第三滚子从动件作为滑动滚子结构,提高冲击强度,即使第三滚子从动件以大的力叩击第二低提升凸轮,也能通过表面压力传递力,不会产生变形或压痕,使相对于旋转的低提升侧的凸轮的第三摇臂的靠接部成为对刚性加以考虑的结构,至少第二滚子从动件相对于高提升凸轮来说,作为滚针滚子,减少摩擦,是考虑了旋转阻力的结构,并能提高了耐久性。 Thus, in a third lift amount smaller as the roller follower slide roller structure, improve the impact strength, even if the third roller follower member with a large force of tapping second low lift cam, but also through the pressure surface transmitting forces, no deformation or indentation, the phase for the third arm of the low lift side cam rotation abutment portion becomes a rigid structure to be considered, at least a second roller with respect to the high lift follower cam, the needle roller as to reduce friction, in consideration of the structure of the rotation resistance, and durability can be improved.

附图说明 BRIEF DESCRIPTION

图l是表示备有本发明的实施方式一的例的气门驱动装置的内燃机盖部的俯视图。 Figure l is a plan view of the cover portion internal combustion engine provided with a valve according to the present embodiment of the invention according to a drive.

图2是图1的主要部分的放大图。 FIG 2 is an enlarged view of a main portion of FIG. 1.

图3是图2中m—m线的向视图。 FIG 3 is a view in FIG. 2 m-m line.

图4是图2中IV—IV线的向视图。 FIG 4 is a view in line IV-IV of 2 to view. 图5是图2中V—V线的向视图。 FIG 5 is a view in line V-V of FIG 2. 图6是活塞支持部的断面图。 FIG 6 is a sectional view of the piston support portion. 图7是从凸轮轴侧面观察的摇臂的斜视图。 FIG 7 is a perspective view of the rocker arm viewed from the camshaft side.

图8是从进气门侧观察的摇臂的斜视图。 FIG 8 is a perspective view of the rocker arm as seen from the intake valve side.

图9是表示油压系统的内燃机主要部分的斜视图。 9 is a perspective view of a main portion of a hydraulic system of an internal combustion engine.

图10示出了蓄能器的安装状况的断面图。 FIG 10 shows a cross-sectional view of the installed state of the accumulator.

图ll是油压系统的概略回路图。 Fig ll is a schematic circuit diagram of a hydraulic system.

符号说明 Symbol Description

l是气缸盖,2、 3是摇臂轴,4是凸轮轴,5是第一摇臂,6是第三摇臂,7是第二摇臂,8是气缸单元,9是第一进气门,IO是第一低提升凸轮, ll是第二进气门,12是第二低提升凸轮,13是开口部,14是活塞,15是 l is the cylinder head, 2, 3 is a rocker arm shaft, camshaft 4, the first rocker arm 5, 6 is the third arm, the second rocker arm 7, a cylinder unit 8, 9 is a first inlet door, the IO is a first low lift cam, ll is the second intake valve, the second low-lift cam 12, is an opening portion 13, a piston 14, 15 is

圆柱部,16是切槽,17是回复弹簧,18是油路,19是通路,20是高提升凸轮,21是第一滚子从动件,22是内滚子,23是外滚子,24是第三滚子从动件(滑动滚子),25、 28是滚针轴承,26、 29是外滚子,27是第二滚子从动件(滚针滚子),34是切槽面,35是凸台部,36是销,41是油泵, 42是油通路,43是油控制阀,44是蓄压路,45是蓄能器,46是第二过滤器,47是第一过滤器,48是旁通通路,51是本体,52是弹簧,53是活塞, 54是弹簧座,55是止动环,56是阳螺纹部,61是盖,62是折流板,63是平板。 The cylindrical portion, the slots 16, 17 is a return spring 18 is a passage, 19 is a passage, 20 is a high lift cam follower roller 21 is a first member, the roller 22 is, outer roller 23 is, 24 is a third roller follower (sliding roller), 25, 28 is a needle bearing 26, an outer roller 29, second roller 27 is a follower (needle roller) 34 is cut groove face, a boss portion 35, a pin 36, a pump 41, an oil passage 42, oil control valve 43, the accumulator 44 is the path, the accumulator 45, 46 is a second filter, 47 is a first a filter, 48 is a bypass passage, a main body 51, a spring 52, a piston 53, a spring seat 54, a stop ring 55, 56 is a male threaded portion 61 is a lid, a baffle 62, 63 It is flat.

具体实施方式 detailed description

图l示出了本发明的实施方式一的例的备有气门驱动装置的内燃机的盖部的俯视图,图2示出了图1的主要部分的放大状况,图3是图2中ni 一III线的向视图,图4是图2中IV—IV线的向视图,图5是图2中V—V线的向视图,图6示出了活塞支持部的断面,图7是从凸轮轴侧面观察的摇臂的斜视图,图8是从进气门侧观察的摇臂的斜视图,图9是表示液压系统的内燃机主要部分的斜视图,图10示出了蓄能器的安装状况的断面, 图ll示出了液压系统的概略回路状况。 Figure l shows a top view of the cover portion of the engine according to the embodiment of the present invention is one provided with a valve driving apparatus, and FIG. 2 shows an enlarged condition of a main portion of FIG. 1, FIG. 3 is 2 ni a III line a view, FIG. 2 is a line IV-IV of FIG. a view, FIG. 2 FIG. 5 is a line V-V shows a view, a cross section of FIG. 6 of the piston support portion, FIG. 7 from the camshaft FIG perspective side view of the rocker arm, the rocker arm of FIG. 8 is a perspective view viewed intake valve, FIG. 9 is a perspective view showing a main part of a hydraulic system of an internal combustion engine, FIG. 10 showing the mounting condition of the accumulator cross section, FIG. ll shows a schematic circuit condition of the hydraulic system.

如图l所示,在气缸盖1上平行地固定有进气侧的摇臂轴2和排气侧的摇臂轴3。 As shown in FIG. L, in parallel to the rocker shaft cylinder head fixed to the intake side and the exhaust side rocker shaft 2 on 13. 在摇臂轴2与摇臂轴3之间的气缸盖1上,可自由转动地支持有凸轮轴4。 The rocker shaft 3 between the cylinder 2 and the rocker arm shaft lid 1, rotatably support the camshaft 4. 图示的内燃机采用在直列4缸的每个气缸上分别设置有两个进 Using the internal combustion engine illustrated in each cylinder inline 4-cylinder are respectively provided with two intake

气门与两个排气门的结构。 Structure valve and two exhaust valves.

如图1至图5所示,在摇臂轴2上分别可自由摆动地支持有与各气缸对应的第一摇臂5与第三摇臂6,在第一摇臂5与第三摇臂6之间的摇臂轴2 上,可自由摆动地支持有T字状的第二摇臂7。 1 to 5, the rocker arm shaft 2 are swingably supports the first rocker arm and the third arm 5 corresponding to the respective cylinders 6, when the first arm and the third arm 5 2, swingably supported second arm 7 has a T-shaped rocker shaft 6 between. 在第一摇臂5与第三摇臂6 上形成有作为连接切换机构的气缸单元8,第二摇臂7的T字状顶端7a、 7b 可连接到气缸单元8上。 5 is formed on the first rocker arm and the third arm cylinder unit 6 serving as a connection switching mechanism 8, the second rocker arm 7 to the top T-shaped 7a, 7b can be connected to the cylinder unit 8.

第一摇臂5的顶端与第一进气门9连接,第一摇臂5的基端由第一低提升凸轮10驱动。 The top of the first rocker arm 5 and the first intake valve 9 is connected, the first rocker arm 5 base end of the first low lift cam 10 is driven. 第三摇臂6的顶端与第二进气门11连接,第三摇臂6的基端由提升量小于第一低提升凸轮10的第二低提升凸轮12驱动。 Third arm tip 11 is connected to the second intake valve 6, the third arm base end 6 of the first lift amount is smaller than the second low low lift cam 12 drives the cam 10 lift. 换句话说, in other words,

第一进气门9与第二进气门11分别以规定定时并以不同的提升量开闭。 First intake valve 911 respectively at predetermined timing of the second intake valve lift amount and a different opening and closing. 另外,第二低提升凸轮12也可以选择实质上让第二进气门11处于间歇状态的形状。 Further, the second low-lift cam 12 may be selected so that the second intake valve 11 is substantially in the shape of an intermittent state.

如图3、图4、图7及图8所示,第一摇臂5与第三摇臂6上分别形成有气缸单元8,在各气缸单元8上与第二摇臂7的T字状顶端7a、 7b对置地形成有开口部13a、 13b,在气缸单元8上可自由滑动地备有活塞14a、 14b, 活塞14a、 14b具有与气缸单元8的内壁滑动接触的圆柱部15a、 15b,同时, 在圆柱部15a、 15b的上部形成有连续地切开开口部13a、 13b的切槽16a、 16b。 3, 4, 7 and 8, the first rocker arm 5 and the third rocker arms 8 are formed in the respective cylinder unit and the second rocker arm 8 has a T-shape of the cylinder unit 7 6 top 7a, 7b has an opening portion formed opposite 13a, 13b, the cylinder unit 8 is slidably provided with a piston 14a, 14b, pistons 14a, 14b has a cylindrical portion in sliding contact with the inner wall of the cylinder unit 8, 15a, 15b, Meanwhile, a cylindrical portion is formed in an upper portion 15a, 15b are continuously incised opening portions 13a, 13b of the slots 16a, 16b.

活塞14a、 14b被回复弹簧17a、 17b向下方偏置,使切槽16a、 16b始终处于面对开口部13a、 13b的状态(图4的状态)。 Pistons 14a, 14b by the return springs 17a, 17b biased downward, so that the slots 16a, 16b is always in the state (state of FIG. 4) facing the opening portions 13a, 13b of. 在摇臂2的轴心部分形成油路18,通过后述的油压供给机构,以规定的定时将压力油供给该油路18。 Forming passage 18, the hydraulic pressure supply mechanism described later in the axial center portion of the rocker arm 2, at a predetermined timing is supplied to the pressure oil passage 18. 供给到油路18中的压力油,从通路19供给气缸单元8,通过将压力油供给气缸单元8,可使活塞14a、 14b克服回复弹簧17a、 17b的弹力上升。 Is supplied to the pressure oil passage 18, the supply cylinder unit 19 from passage 8, through the pressure oil supply cylinder unit 8, enables the piston 14a, 14b against the return spring 17a, 17b of the spring force increase. 通过压力油的供给所引起的活塞14a、 14b的上升,使圆柱部15a、 15b处于面对开口部13a、 13b的状态(图3的状态)。 Pressurized oil is supplied through the piston rises caused 14a, 14b of the cylindrical portion 15a, 15b at 13a, 13b facing the opening state (state of FIG. 3).

如图1至图5所示,第二摇臂7的T字状顶端7a、 7b与开口部13a、 13b 的内部连接,第二摇臂7的基端由高提升凸轮20驱动。 As shown in FIGS. 1 to 5, the second rocker arm 7 to the top T-shaped 7a, 7b are connected with the internal opening 13a, 13b, the second arm base end 7 of the high lift cam 20 drive. 高提升凸轮20具有包含第一低提升凸轮10及第二低提升凸轮12的凸轮轮廓,其提升量大于第一低提升凸轮10及第二低提升凸轮12。 A high lift cam 20 has a cam 10 comprising a first low lift cam profile and a second low-lift cam 12, which is greater than the first low lift cam 10 and the second low-lift cam 12 lift.

在活塞14a、 14b被回复弹簧17a、 17b朝下方偏置施力,使切槽16a、 16b处于面对开口部13a、 13b的状态(不供给压力油的状态)下,通过高提升凸轮20驱动第二摇臂7时,第二摇臂7的T字状顶端7a、 7b与开口部13a、 13b内的切槽16a、 16b对置。 The piston 14a, 14b by the return springs 17a, 17b downward biasing force, so that the slots 16a, 16b in a state facing the opening portions 13a, 13b (the state of the pressure oil is not supplied), the driving by a high lift cam 20 the second rocker arm 7, the second T-shaped rocker arm 7a 7 of the top, 7b and the opening portion 13a, in the slot 13b 16a, 16b therebetween. 因此,在通过高提升凸轮20驱动第二摇臂7使其摆动的情况下,第二摇臂7的T字状顶端7a、 7b嵌入(断开状态) 切槽16a、 16b中,第二摇臂7的摆动不传递到第一摇臂5及第三摇臂6上。 Thus, in the case of driving by a high lift cam 20 so that the second arm 7 is swung, the second rocker arm to the top T-shaped 7a, 7b embedded 7 (OFF state) of the slots 16a, 16b, the second roll the swing arm 7 is not transmitted to the first rocker arm 5 and the third rocker arm 6.

因此,通过释放气缸单元8的压力油,借助于第一摇臂5及第三摇臂6 的摆动,使第一进气门9与第二进气门11分别以规定的定时且以不同的提升量开闭。 Thus, by releasing the oil pressure cylinder unit 8 by means of the first rocker arm 5 and the third arm 6 swings, the first intake valve 9 and at a timing different from the second intake valve 11, respectively, in a predetermined enhance the amount of opening and closing.

在将压力油供给气缸单元8,使活塞14a、 14b克服回复弹簧17a、 17b 的弹力上升,并使圆柱部15a、 15b处于面对开口部13a、 13b的状态时, 第二摇臂7的T字状顶端7a、 7b与开口部13a、 13b内的圆柱部15a、 15b对置。 When the oil pressure supplied to the cylinder unit 8, the piston 14a, 14b against the return spring 17a, 17b of the spring force increases, and the cylindrical portion 15a, 15b in a state of opening portions 13a, 13b facing, T 7 of the second rocker arm shaped top 7a, 7b and the opening portions 13a, 15a inside the cylindrical portion 13b, 15b facing. 因此,在通过高提升凸轮20驱动第二摇臂7使其摆动的情况下,第二摇臂7的T字状顶端7a、 7b与圆柱部15a、 15b靠接(连接状态),通过气缸单元8将第二摇臂7的摆动传递给第一摇臂5及第三摇臂6。 Thus, in the case of driving by a high lift cam 20 so that the second arm 7 is swung, the second rocker arm 7 to the top T-shaped 7a, 7b of the cylindrical portion 15a, 15b abutment (connected state), the cylinder unit 8 swing the second rocker arm 7 is transmitted to the first rocker arm 5 and the third arm 6.

从而,借助于把压力油供给气缸单元8中,通过第二摇臂7的摆动所引起的第一摇臂5及第三摇臂6的摆动,第一进气门9与第二进气门11对应于高提升凸轮20的凸轮轮廓,以大的提升量同时开闭。 Whereby, by means of the 8, the second arm 7 is swung by the swing of the rocker arm caused by the first and third rocker arms 5 6, the first intake valve 9 and the second oil pressure supplied to the cylinder intake valve means 11 corresponds to a high lift cam profile of the cam 20 to the large lift amount simultaneously opened and closed.

将压力油向气缸单元8的供给以及供给的释放、即第二摇臂7、第一摇臂5及第三摇臂6的连接状态与断开状态的切换,是根据车辆行驶状态(内燃机的旋转速度状态)预先设定的。 And releasing oil pressure supplied to the cylinder unit 8 is supplied, i.e., the second rocker arm 7, the first rocker arm and the third arm 5 and 6 connected state switching off state, based on the vehicle running state (the internal combustion engine rotational speed state) previously set.

例如,在内燃机的旋转速度为低速的情况下,释放向气缸单元8的压力油供给,通过第一摇臂5及第三摇臂6的摆动,分别以规定定时且以不同的提升量开闭第一进气门9与第二进气门11。 For example, the engine rotational speed is low speeds, the oil pressure supplied to the release cylinder unit 8, the swing arm 5 via the first and third rocker arms 6, respectively, and at a predetermined timing different opening and closing lift amount first intake valve 9 and the second intake valve 11. 由此,促进涡流,强化燃烧。 This promotes the vortex, enhanced combustion. 而且,在内燃机的旋转速度为高速的情况下,将压力油向气缸单元8 供给,借助于第二摇臂7的摆动所引起的第一摇臂5及第三摇臂6的摆动, 使第一进气门9与第二进气门11以大的提升量同时开闭。 Further, in the case where the engine rotational speed is a high speed, the oil pressure supplied to the cylinder unit 8, the first arm 5 by means of the third arm and the second rocker arm 7 swings caused by 6, the first an intake valve 9 and the second intake valve 11 with a large lift amount simultaneously opened and closed. 由此,确保大量 Thus, to ensure that a large number of

的进气,强化输出。 Intake, enhanced output.

如图3及图7所示,在第一摇臂的5基端侧的与第一低提升凸轮10的靠接部上,设置有第一滚子从动件21,通过第一滚子从动件21使第一摇臂5 的基端处于以最小阻力靠接在旋转的第一低提升凸轮10上的状态。 3 and 7, at the base end of the first rocker arm 5 and the first side of the low lift cam 10 against the upper portion is provided with a first roller follower 21, by a first roller from the base end of the movable member 21 causes the first arm 5 is in abutment with minimal drag on the rotating cam 10 is a first low lift state. 如图7 所示,第一滚子从动件21通过多个滚针轴承25可自由旋转地构成外滚子26,并使外滚子26与第一低提升凸轮10滚动接触。 7, the first follower roller 21 via a plurality of needle bearings 25 may be rotatably configured outer roller 26 and outer roller 26 in contact with the low lift cam 10 of the first scroll.

如图4及图7所示,在第三摇臂6的基端侧的与第二低提升凸轮12的靠接部上,设置有第三滚子从动件24,通过第三滚子从动件24使第三摇臂6 的基端处于以无阻力靠接在旋转的第二低提升凸轮12上的状态。 As shown in FIG. 4 and FIG. 7, the base end side of the third rocker arm 6 and the second low lift cam against the upper portion, provided with a third roller 12 and follower 24, the third roller from the base end of the movable member 24 causes the third arm 6 is in a state without contact with the second low resistance against the rotation of the lift cam 12. 如图7所示,第三滚子从动件24形成有作为内滚子22与外滚子23的双环状滑动滚子。 As shown in FIG 7, a third follower roller 24 is formed as an inner roller 22 and outer roller 23 bicyclic sliding roller. 内滚子22与外滚子23彼此同心状态,自由转动地嵌合在一起,外滚 The inner roller 22 and outer roller 23 concentrically with each other, rotatably fitted together, the outer race

子23与第二低提升凸轮12滚动接触。 Low lift sub 23 and the second rolling contact with the cam 12. 双环状滑动滚子与使用滚针轴承的滚针滚子相比较,在滚子旋转为低速旋转时摩擦变大。 Bicyclic sliding roller in comparison with the use of needle roller needle bearing, the friction becomes large when the rotation of the roller to the low speed rotation. 因此,为了减少摩擦,在内滚子22的表面实施了例如使表面变光滑用的精加工或润滑表面处理(溶胶涂浆处理)。 Accordingly, in order to reduce friction, the inner surface of the sub roller 22 of the embodiment, for example, the surface becomes smooth with a surface finishing or lubricating treatment (sol matte-treated). 结果,双环状滑动滚子与滚针滚子相比较,价格高且滚子低速旋转时摩擦大。 As a result, the sliding roller and bicyclic needle roller compared to the high price and low-speed large friction roller rotates.

如图5及图7所示,在第二摇臂7的基端侧的与高提升凸轮20的靠接部上,设置有第二滚子从动件27,通过第二滚子从动件27使第二摇臂7的基端处于以无阻力靠接在旋转的高提升凸轮20上的状态。 5 and FIG. 7, the proximal end of the second arm 7 with the high-lift side cam 20 against the upper portion, provided with a second roller follower 27, the second follower roller the base end 27 of the second rocker arm 7 is in a state of no resistance to rotation of the abutment 20 of the high lift cam. 第二滚子从动件27通过多个滚针轴承28可自由旋转地构成外滚子29,并使外滚子29与高提升凸轮20滚动接触。 The second follower roller 27 is rotatably bearing 28 constituting the outer roller 29 via a plurality of needle rollers 29 and outer roller 20 in rolling contact with the cam lift high. 因此,使用要求高输出的高提升凸轮20时,通过摩擦小的滚针滚子27驱动第一进气门9及第二进气门11 ,可以减少摩擦损失,更进一步提高输出。 Therefore, high output is required when high lift cam 20, the low friction needle roller 27 drives the first intake valve 9 and the second intake valve 11, the friction loss can be reduced, further increasing the output.

另外,第一滚子从动件21也可以采用与第三滚子从动件24同样的结构,由内滚子22与外滚子23构成(双环状滑动滚子),使外滚子23与第一低提升凸轮10滚动接触。 Further, the first follower roller 21 may be the same structure as the third roller follower 24, the inner roller 22 and outer roller 23 constituting (bicyclic sliding roller), the outer roller 23 the first cam 10 in rolling contact with the low lift.

另外,如图1所示,在排气侧的摇臂轴3上可自由摆动地支持有排气摇臂31a、 31b,各个排气摇臂31a、 31b通过排气凸轮驱动。 Further, as shown, the exhaust-side rocker shaft 3 on the support 1 swingably exhaust rocker arm 31a, 31b, the respective exhaust rocker arms 31a, 31b driven by an exhaust cam.

但是,设定成例如,高提升凸轮20所引起的第一进气门9及第二进气门ll的提升量大,第一低提升凸轮10所引起的第一进气门9的提升量多少小于高提升凸轮20产生的提升量,并且,第二低提升凸轮12所引起的第二进气门11的提升量与高提升凸轮20产生的提升量相比相当小。 However, set, for example, the first intake valve 20 caused by the high lift cam and a second intake valve 9 ll lift amount, the first intake valve of the first low lift cam 10 caused by lift amount 9 much less than 20 to produce a high lift cam lift amount, and the second low valve lift of the second intake cam 12 caused by lift amount smaller than 11 equivalent to the amount of lift of the high lift cam 20 is generated.

因此,在向气缸单元8供给压力油(变成连接状态),并借助于第二摇臂7的摆动所引起第一摇臂5及第三摇臂6的摆动,使第一进气门9及第二进气门ll以大的提升量同时开闭的情况下,高提升凸轮20产生的提升量大于第二低提升凸轮12及第一低提升凸轮10所产生的提升量。 Thus, the cylinder unit 8 is supplied to the oil pressure (becomes a connected state), and a second rocker arm 7 by means of a first rocker arm 5 and the third rocker arm 6 is caused, the first intake valve 9 ll and a second intake valve in the case of large lift amount simultaneously opened and closed, to enhance the high lift cam 20 is greater than the second generation low lift cam 12 and the lift amount of the first low lift cam 10 generated. 因而, 可以在第二低提升凸轮12与第三滚子从动件24之间产生大的间隙、第一低提升凸轮10与第一滚子从动件21之间产生小于第二低提升凸轮12与第三滚子从动件24的间隔的间隙的状态下,进行运转。 Accordingly, a large gap may be produced between the second 12 and the third low lift cam follower roller 24, is less than a second to generate a low lift cam 21 between a first low lift cam 10 and the first follower roller 12 in a state with the gap spacing 24 of the third member is a roller follower, to be operated.

虽然其说明省略了,但是,第一摇臂5、第二摇臂7及第三摇臂6被图中未示的偏置装置始终向凸轮侧偏置。 Although the description thereof is omitted, but the first rocker arm 5, a second and a third arm 6 the rocker arm 7 is not shown biasing means is always biased toward the cam side. 在向气缸单元8供给压力油并借助于第二摇臂7的摆动所引起第一摇臂5及第三摇臂6的摆动,使第一进气门9及第二进气门11开闭的状态下,如果释放向气缸单元8的压力油的供给, 即切换到进气状态时,则释放第二摇臂7所产生的摆动的传递,通过偏置使第一摇臂5及第三摇臂6向第一低提升凸轮10及第二低提升凸轮12侧摆动。 In supplying the pressure oil to the cylinder unit 8 and the second rocker arm 7, the first rocker arm 5 and the third rocker arm 6 is caused by means of the first intake valve 9 and the second intake valve 11 opening and closing under the state, if the pressure is released to the oil supply cylinder unit 8, i.e., the state is switched to the intake, the second rocker arm swinging generated transmission 7 is released, by biasing the first and third rocker arms 5 6 the rocker arm 10 and the second low-lift cam lift cam 12 swings to the first lower side.

在这种情况下,例如,如果由于在最大提升时,第二低提升凸轮12 与第三滚子从动件24之间的向隙变大,因此,第一摇臂5及第三摇臂6被偏置力向第一低提升凸轮10及第二低提升凸轮12侧摆动时,第三滚子从动件24及第一滚子从动件21有处于叩击第二低提升凸轮12及第一低提升凸轮10的状态的可能性。 In this case, for example, if the time since the maximum lift, the second low lift cam follower roller 12 and the third member 24 to the gap between the larger, therefore, the first rocker arm and the third arm 5 6 by the bias force of the lifting cam 12 swung toward the first side 10 and a second lower low lift cam, a third follower roller 24 and the first follower roller 21 has a low lift cam is in the second tapping 12 a first low lift state and the likelihood of the cam 10.

由于第一滚子从动件21与第一低提升凸轮10之间的间隙很小,不会有大的力作用,而第三滚子从动件24与第二低提升凸轮12的间隙大,产生叩击时会有大的力作用。 Because the first follower roller 21 with a small gap between a first low lift cam 10 does not have a large force, while the third follower roller 24 and the large gap 12 of the second low-lift cam there will be generated when a large percussion force.

因此,本发明的第三滚子从动件24釆用了内滚子22及外滚子23的双环状滑动滚子结构。 Accordingly, the third follower roller 24 of the present invention preclude the roller 22 and outer roller 23 is slidably bicyclic structures within the rollers. 由于第三滚子从动件24为双环状滑动滚子结构,因此,可提高冲击强度,即使因大的力使第三滚子从动件24叩击第二低提升凸轮12,也能通过表面压力传递力,不会产生变形或压痕,可以消除损坏外滚子23之虞。 Since the third roller 24 is a follower roller slide bicyclic structure, and therefore, can improve the impact strength, even if the large force of the third roller follower 24 of the second tap low lift cam 12, can be transmitted through the surface pressure force, no deformation or indentation, can eliminate the risk of damage to the outer 23 of the roller.

从而,第三摇臂6的相对于旋转的第二低提升凸轮12的靠接部采用考虑了刚性及旋转阻力的结构。 Thus, third arm 6 with respect to the rotation of the second low lift cam abutment portion 12 using the consideration of the rigidity and the resistance to rotation of the structure.

在上述实施方式例中,在设置有相对于提升量大的第二摇臂7来说提升量小的两种不同的第一摇臂5与第三摇臂6的内燃机中,虽然作为双环状滑动滚子的例,说明了提升量差大的第三滚子从动件24,但是,本发明的第一滚子从动件21也可以采用双环状滑动滚子。 In the embodiment above embodiment, there is provided a second rocker arm is greater relative to the riser 7 for two different small lift amount of the engine the first rocker arm 5 and the third arm 6, although as bicyclic shaped sliding roller examples illustrate the large difference in lift amount third follower roller 24, however, the first follower roller 21 of the present invention may be employed bicyclic sliding roller.

不过,双环状滑动滚子虽然有高刚性的优点,但是,也有上述的高价、而且转子低速旋转时摩擦大的缺点,因此,第一滚子从动件21釆用双环状滑动滚子时,必须要考虑费用和使用条件。 However, while double annular sliding roller has the advantage of high rigidity, however, there are the aforementioned high and low speed rotation of the rotor large friction disadvantage therefore, the first follower roller 21 with the roller slide preclude bicyclic when, we must consider the cost and conditions of use. 例如,在第一低提升 For example, a first low lift

凸轮10为类似于高提升凸轮20的形状的情况下,由于第一低提升凸轮IO 与第一滚子从动件21的间隔小,所以,最好使用滚针滚子。 10 similarly to the case of a high lift cam shape of the cam 20, due to the small distance between the first IO and low lift cam follower roller 21 first, it is preferable to use needle roller. 相反,在第一低提升凸轮10为类似于第二低提升凸轮12的形状的情况下,由于第一低提升凸轮10与第一滚子从动件21的间隔大,所以,最好使用双环状滑动滚子。 In contrast, in a case where a first low lift cam 10 is shaped similarly to the second low lift cam 12, since the first interval of the low lift cam 10 and the first follower roller 21, it is preferable to use bis an annular sliding roller. 详细地说,如果第一低提升凸轮10与第一滚子从动件21的间隔在第二低提升凸轮12与第三滚子从动件24的间隔的一半以下,则选择使用滚针滚子,如果第一低提升凸轮10与第一滚子从动件21的间隔在第二低提升凸轮与第三滚子从动件24的间隔的一半以上,则选择使用双环状滑动滚子。 In detail, if the first spacer 10 and the low lift cam follower 21 of the first roller in the second 12 and the third low lift cam follower roller 24 is spaced one half or less, is selected using needle roller promoter, if the first spacer 10 and the low lift cam follower 21 of the first roller in the second and third low lift cam follower roller 24 is more than half the interval, is selected using a sliding roller bicyclic .

另外,如本案的申请人申请的特开2001—41017中所示,对于切换提升量不同的两种摇臂的结构的单进气门型内燃机来说,也可以采用以与提升量小的一侧的凸轮靠接的滚子作为第一滚子从动件,做成滑动滚子的本发明。 Further, Applicant as the case shown in Laid-Open 2001-41017, for a single switch to a different type internal combustion engine intake valve lift amount of a rocker arm is two, and may be employed in a small lift amount against the side of the cam contact roller as the first roller follower, the present invention is made of a sliding roller.

另外,作为上述滑动滚子,虽然使用了双环状滑动滚子,但是,也可以采用仅由外滚子形成的单环状滑动滚子。 Further, as the slide rollers, although the use of bicyclic sliding roller, however, may be formed only by the outer rollers of the sliding roller monocyclic employed. 但是,在用单环状滑动滚子的情况下,由于与双环状滑动滚子相比耐久性差,而且,有进一步增大摩擦的问题,所以,存在使用第一低速凸轮10及第二低速凸轮12时的发动机的输出降低的可能性,而且,在使用高速凸轮20时,由于通过滚针滚子使第一进气门9与第二进气门11动作,所以,摩擦小。 However, in the case of a single annular roller slide, the sliding roller and the durability is poor compared bicyclic, and, there is a problem of further increasing the friction, so there is the use of a first low-speed cam 10 and the second low-speed possibility of reduced output of the engine cam 12, and, when the high-speed cam 20, since the needle roller operation of the first intake valve 9 and the second intake valve 11, the low friction. 从而,在使用高速凸轮20时的发动机的输出与使用低速凸轮10、 12时的发动机的输出之间的输出偏差进一步增大,很容易在切换高速凸轮与低速凸轮时产生输出变动,存在导致运转性能恶化的可能性。 Accordingly, 10 outputs a deviation between the output of the engine 12 is further increased using the output of the engine 20 is a high speed cam and a low-speed cam, it is easy to produce an output variation when switching the low speed cam and a cam, the operation result in the presence of the possibility of performance degradation. 因而滑动滚子最好使用双环状滑动滚子。 Thus preferably a dual sliding roller ring slide roller.

如图8所示,由于活塞14的上部形成有切槽16,因而将回复弹簧17 配置在与活塞14的轴心错开的位置。 As shown in FIG 8, the upper piston 14 is formed with a slot 16, and thus the return spring 17 is disposed offset from the axis of piston 14 position. 因此,当活塞14围绕中心轴旋转时, 回复弹簧17的偏置力违背设计要求。 Thus, when the piston is rotated about the central shaft 14, the biasing force of return spring 17 contrary to the design requirements. 因此,在本实施方式例中;如图6、 图7所示,设置有活塞14的止转用机构。 Thus, in the embodiment according to the present embodiment; FIG. 6, FIG. 7, the piston is provided with a mechanism 14 for stopping rotation.

如图2、图6、图8所示,在活塞14的形成有切槽16的部位的外周上, 形成有切槽面34,在第一摇臂5及第三摇臂6的气缸单元8上,对应于切槽面34形成有凸台35 (参照图2)。 2 on the outer periphery, FIG. 6, as shown, the piston 14 is formed with a notch portion 16 of FIG. 8, with a slot surface 34, the first rocker arm 5 and the third arm cylinder unit 6 is formed of 8 on surface 34 corresponding to the slot is formed with a boss 35 (see FIG. 2). 切槽面34在避开气缸单元8的开口部13并避开活塞14的背面侧的位置形成,在切槽面34上将销36以沿轴向接触并嵌合于切槽面34上的状态配置。 Slots 34 face away from the opening portion in the cylinder units 13 and escaping position 8 of the back side of the piston 14 is formed in the slot 34 on the surface of the contact pin 36 in the axial direction and fitted to the upper surface 34 of the slots state configuration. 销36通过压入等方法固定到凸台35上, 销36配设成使其中心轴在与沿摇臂轴2的水平面平行的面上延伸。 By press-fitting pin 36 secured to the bosses 35, the pin 36 is disposed so that its center axis extends in a horizontal plane along the surface parallel to the rocker shaft 2.

作为止转用机构,虽然也可以在沿着摇臂轴2的水平平面上朝直角方向等配设销36,但是,在沿直角方向等上配设销36的情况下,必须在活塞14的下部的圆柱部15上形成销36的嵌合部。 As a rotation preventing mechanism, although it could be in a horizontal plane along the rocker arm shaft 2 toward a direction perpendicular to the like is disposed a pin 36, however, in the case of a right angle in the direction of the pin 36 is provided, the piston 14 must be the fitting portion 36 of pin 15 is formed on the lower portion of the cylindrical portion. 由于圆柱部15在气缸单元8 上嵌合滑动,处于防止油泄漏的部位,因此,在圆柱部15上形成销36的嵌合部时,存在油泄漏的可能性。 Due to the fitting cylindrical portion 15 on the slide cylinder unit 8, is prevent oil leakage sites, thus forming the fitting portion 36 of the pin 15 on the cylindrical portion, there is a possibility of leakage of oil. 所以,将销36配设成使其中心轴在与沿摇臂轴2的水平面平行的面上延伸。 Therefore, the pin 36 is disposed so that its center axis extends in a horizontal plane along the surface parallel to the rocker shaft 2.

第一摇臂5及第三摇臂6通过第二摇臂7的摆动而摆动时,从第二摇臂7侧的承受最大载荷的部位是活塞14的背面。 When the first rocker arm 5 and the third arm 6 is swung by the swing of the second rocker arm 7, the second arm receiving portion 7 from the side of the maximum load is a rear piston 14. 因此,销36配设在避开活塞14的背面的倾斜位置。 Thus, the pin 36 disposed at the rear surface of the piston 14 away from the inclined position. 另外,销36固定在避开气缸单元8的开口部13的位置的凸台35上。 35 on the other, pin 36 is fixed at a position away from the opening portion of the cylinder unit 8 of the boss 13. 因此,不会妨碍第二摇臂7的顶端7a、 7b从开口部13向活塞14侧移动,另外,通过活塞14的摆动力的传递,也是可在整个背面上进行。 Thus, the second rocker arm does not interfere with the top 7 7a, 7b 13, further, also be carried out by the swing force transmitting piston 14 moves the piston 14 toward the side from the opening portion on the entire back surface.

切槽面34在圆柱部15的中间部分形成,借助于销36防止活塞14向外面脱出。 Slot surface 34 at an intermediate portion of the cylindrical portion 15 is formed, by means of a pin 36 to prevent the piston 14 coming out to the outside. 另外,如图2、图8所示,第一摇臂5及第三摇臂6上的气缸单元8 的凸台35沿同一方向形成,配置成活塞14的切槽面34朝向同一方向,并且销36相互平行的状态。 Further, in FIG. 2, FIG. 8, a first rocker arm 5 and the third boss 35 in the same direction on the cylinder unit 68 is formed, arranged slots 34 in the same direction of the surface of the piston 14, and pin 36 parallel state. 因此,第一摇臂5及第三摇臂6的活塞14可以通用化,从而可降低零部件的成本,防止误组装的发生。 Thus, the first rocker arm 5 and the third arm 14 of the piston 6 can be generalized, so that the cost of parts can be reduced, preventing the occurrence of erroneous assembly.

但是,在进气侧的摇臂轴2上,在各气缸上支持着第一摇臂5、第三摇臂6及第二摇臂7,第一摇臂5及第三摇臂6备有切换机构,该切换机构具有气缸单元8及活塞14。 However, on the intake side rocker shaft 2, on each cylinder 5 supports the first rocker arm, third arm 6 and second arm 7, the first rocker arm and the third arm 5 with 6 the switching mechanism, the switching mechanism having a piston 14 and cylinder unit 8. 因此,与排气侧的气门开闭机构相比,进气侧 Thus, the valve opening as compared to the exhaust side, the intake side of the closing mechanism

的气门开闭机构更复杂,而且重量大。 Valve opening and closing mechanism is more complex and heavy.

从而,如图1所示,进气侧的摇臂轴2的直径D1形成为大于排气侧的摇臂轴3的直径D2 (例如大10%的程度)。 Thus, as shown in FIG. 1, the diameter of the intake side rocker shaft 2 has a diameter D1 D2 (e.g. 10% extent) is greater than the exhaust-side rocker shaft 3. 因此,能确保重量大的部分的刚性,提高气门驱动系统的运动特性。 Thus, to ensure that the rigid portion of the large weight, to improve the motion characteristics of the valve drive system. 另外,由于增大了摇臂轴2的直径D1, Further, because of the increased diameter D1 2 to the rocker arm shaft,

所以也可以增大油路18的内径,减少通过油路18流动的压力油的压力损失,提高切换机构的性能。 Therefore, the inner diameter of passage 18 can be increased to reduce the pressure loss by the flow of pressure oil passage 18 and improve the performance of the switching mechanism.

下面,基于图9至图11说明向摇臂轴2的油路18的压力油给排机构、 即气缸单元8的或活塞14的驱动机构。 Next, the drive mechanism 9 to 11 illustrate the pressure oil to the rocker arm shaft oil passage 182 to the discharge mechanism, i.e. a piston cylinder unit 14 based or 8.

在气缸盖l的端部侧,形成有使来自油泵41 (参照图ll)的压力油流通的油通路42,在油通路42上设置有用于控制向油路18的压力油的给排的油控制阀43。 End side of the cylinder head l, is formed so that the pressure from the oil pump 41 (refer to FIG LL) of the oil circulation oil passage 42, an oil passage 42 provided for controlling the pressure of the oil passage 18 to supply and discharge oil control valve 43. 从油控制阀43的上游侧的油通路42分支,设有蓄压路44, 在蓄压路44上连接有蓄能器45。 From the oil passage 43 of the upstream-side branched oil control valve 42, an accumulator passage 44 is provided with an accumulator 45 is connected to the accumulator passage 44. 蓄能器45作为一个部件固定在气缸盖1 上。 The accumulator 45 as a member fixed to the cylinder head 1.

在油控制阀43的上游侧,在蓄压路44的分支部的上游侧的油通路42 上,设置有第二过滤器46。 On the upstream side of the oil control valve 43, the accumulator oil passage on the upstream side of the branch portion 44 of the passage 42, 46 is provided with a second filter. 图11中的符号47是设置在油泵41的排出侧的第一过滤器,48是使油泵41旁通的旁通通路,在该旁通通路上装有图中未示出的溢流阀。 Symbol 47 in FIG. 11 is a first filter disposed in the discharge side of the oil pump 41, oil pump 48 is to bypass the bypass passage 41, with the relief valve is not shown in FIG. In this bypass passage.

如图10所示,蓄能器45设置有沿垂直方向固定在气缸盖1上的筒状本体51,在筒状本体51上可自由滑动地备有被弹簧52向下方偏置的活塞53。 As shown, the accumulator 45 is provided with a vertically fixed to the cylinder head 51 on the cylindrical body 1 may be provided with slidably in the cylindrical body 51 is biased downward of the spring 52 to the piston 5310. 弹簧52的上部设置有弹簧座54及止动环55,弹簧52处于被收纳于本体51 内的状态。 Upper spring 52 is provided with a spring seat 54 and the snap ring 55, the spring 52 is housed within the main body 51 in the state.

在本体51的下部形成有阳螺纹部56,通过将阳螺纹部56拧入气缸盖1 的阴螺纹部57中,将蓄能器45固定在气缸盖1上。 A male screw portion 56 is formed, by the male screw portion 56 is screwed into the female screw portion of the cylinder head 1 57, the accumulator 45 is fixed to the cylinder head 1 in a lower portion of the body 51. 把蓄能器45固定在气缸盖1上时,本体51的上部的一部分处于从气缸盖1的上面突出的状态。 When the accumulator 45 is fixed to the cylinder head 1, the upper portion of the main body 51 in a state projecting from an upper cylinder head. 通过将本体51固定到气缸盖1上,使蓄压路44与本体51连通,将压力油供给到活塞53的下侧,活塞53克服弹簧52的偏置力上升,使压力油在本体51 内蓄压。 By fixing the body 51 to the cylinder head 1, so that the accumulator body 51 communicates with the passage 44, the pressure oil is supplied to the lower side of the piston 53, the piston 53 against the biasing force of the spring 52 increases, the pressure oil in the body 51 accumulator.

气缸盖1的上部设置有盖61,为了收集烟雾,在盖61内设置有折流板62及平板63。 An upper portion of the cylinder head 1 is provided with a cover 61, for collecting mist, is provided with baffles 62 and 63 in the cover plate 61. 并且,平板63位于从气缸盖1的上面突出的本体51的上部的正上方。 And, positioned directly above the upper plate 63 protrudes above the body 51 1 from the cylinder head. 因此,即使拆卸止动口环55脱出,弹簧座54、弹簧52、活塞53 也与平板63接触而防止其向外飞出。 Thus, even if the detached ring 55 coming out of the detents, spring seat 54, spring 52, piston 53 is also in contact with the plate 63 and prevent it from flying out.

本体51的上部与平板63的间隔S1设定成比阳螺纹部56的长度S2短, 因此,即使本体51相对于气缸盖1的螺纹固定松弛,使本体51朝脱出的方 An upper plate body 51 with an interval S1 63 is set to be shorter than the length S2 of the male threaded portion 56, and therefore, even if the body 51 with respect to the slack side of the cylinder head 1 is screwed to the body 51 toward the extrusion

向(上方)移动,在阳螺纹部56的螺纹连接松开之前,本体51的上部也会与平板63接触,本体51不会脱出。 (Upward) direction, until the screw thread portion 56 of the male connection release, the upper portion body 51 will not to come in contact with the flat plate 63, body 51. 因此,不会把油通路42或蓄压路44 朝外部开放。 Therefore, no oil passage to the accumulator 42 or passage 44 is open to the outside.

由于将蓄能器45的本体51用下部的阳螺纹部56固定在气缸盖1上,所以,即使在固定部产生油的漏泄等,也不会漏泄到外部。 Since the accumulator 45 is the male threaded body 51 with a lower portion 56 fixed to the cylinder head 1, so that, even if an oil leak in the fixed portion and the like, does not leak to the outside. 由此,即使简化固定部的密封,也可抑制向外部的泄漏油。 Thus, even simplified seal fixing portion, the leak oil can be suppressed to the outside. 另外,本体51的固定也可以采用压入固定、或通过凸缘与固定螺纹的组合来固定等,除借助阳螺纹部56固定的方式之外的结构。 Further, the fixed body 51 may be fixed using press-fitting, or by a combination of fixed flange fixing screw or the like, in addition to the structure in a fixed manner by means of the male threaded portion 56.

上述构成的摇臂轴2的向油路18的压力油的给排机构中,当借助油泵41的驱动从油通路42向蓄压路44供给压力油时,压力油被第二过滤器46 过滤,并供给到油控制阀43及蓄能器45、排气侧的摇臂轴3。 Axis of the rocker arm mechanism configured to supply and discharge the pressure oil passage 18 2, the oil pump driving means when the passage 41 into the accumulator 42 is supplied from the oil pressure passage 44, the oil pressure of the second filter 46 is a filter , and is supplied to the oil control valve 43 and the accumulator 45, the exhaust side rocker shaft 3. 在油控制阀43处于0FF (关闭)状态的情况下,借助于蓄压路44的油压,将压力油储蓄到蓄能器45中。 In the case of the oil control valve 43 is in the 0FF (closed) state by means of a hydraulic accumulator passage 44, the pressure oil in the accumulator 45 to the savings.

发动机以规定的速度旋转时,由于通过高提升凸轮20的驱动来切换, 因此,油控制阀43处于0N (打开)状态。 When the rotational speed of the engine at a predetermined, since the drive is switched by a high lift cam 20, therefore, the oil control valve 43 is 0N (open) state. 压力油经由油控制阀43急剧地向进气侧的摇臂轴2的油路18中流动。 The oil pressure valve 43 abruptly flows into the oil passage 18 in the intake side rocker shaft 2 via the oil control. 这时,压力油的供给量不足,油通路42及蓄压路44的油压暂时会降低,所以蓄能器45中储蓄的压力油由弹簧52的弹力推出,补充压力油的不足。 At this time, the pressure oil supply amount is insufficient, the hydraulic oil passage 42 and the accumulator passage 44 is temporarily reduced, so the savings in the accumulator 45 pressurized oil introduced by the force of the spring 52, the pressure oil supplement.

因此,即使对于一个气缸有两个气缸单元8的切换机构来说,也不会出现压力油的不足,能以更好的响应性供给压力油。 Therefore, even if two cylinder units for the switching mechanism for a cylinder 8, is not less than the oil pressure occurs, can be better responsiveness to supply pressure oil.

由于在蓄能器45的上游侧设置有第二过滤器46,因此可除去包含在蓄能器45所储蓄的压力油中的异物。 Since the upstream side of the accumulator 45 is provided with a second filter 46, thus removing foreign matter contained in the accumulator 45 in the pressure oil deposits. 因此,异物不会浸入蓄能器45的本体51内,活塞53上不会产生粘滑运动。 Thus, the foreign matter does not enter the accumulator 45, body 51, piston 53 does not stick-slip motion.

从蓄能器45推出的压力油不会通过第二过滤器46,而是输送给油控制阀43,因此,可消除因经过第二过滤器46流动而产生的压力损失的影响,能以良好的响应性将压力油供给到摇臂轴2的油路18。 From the accumulator 45 the pressure oil is not introduced through the second filter 46, but is supplied to the oil control valve 43, therefore, can eliminate the influence of the pressure loss due to flow through the second filter 46 is generated, can be a good the responsiveness of the pressure oil is supplied to the oil passage 182 of the rocker arm shaft.

作为采用上述蓄能器45的结构的内燃机及采用设置有第二过滤器46 的回路结构的内燃机,以备有由第一摇臂5、第三摇臂6及第二摇臂7构成的切换机构的结构为例进行了说明,但是,也可适用于备有其他结构的 As the above-described internal combustion engine 45 of the accumulator and the use of a configuration of a circuit configuration provided with the second filter 46, in order to switch from the first rocker arm 5 provided with, third arm and the second rocker arm 6 is composed of 7 structural organization described as an example, however, is also applicable to other structures available

切换机构的内燃机。 Switching the engine mechanism. 例如,如本案的申请人申请的特开2001—41017中所揭示的那样,对于切换提升量不同的两种摇臂的结构的单进气门型内燃机来说,也可采用蓄能器45的结构,或釆用设置有第二过滤器46的回路结构。 For example, as Applicant as in the case of Laid-Open 2001-41017 disclosed, for single-type internal combustion engine intake valve lift amount different configuration of two switching rocker arm, the accumulator 45 may also be employed structure, has a circuit configuration or preclude the second filter 46 is provided with.

此外,在上述实施方式例中,举出将凸轮切换机构设置在进气侧的摇臂轴2上的例子,进行了说明,但是,将进行凸轮切换的机构设置在排气侧的情况也是适用的。 Further, in the above embodiment mode, the switching mechanism includes a cam provided on the example of the intake side rocker shaft 2, has been described, however, a case where the cam switching mechanism is provided on the exhaust side is also applicable of.

发明效果 Effect of the Invention

为了达到上述目的,本发明的内燃机的气门驱动装置包括:摇臂轴; 顶端与第一进气门或第一排气门连接,可自由摆动地支持在上述摇臂轴上,由第一低提升凸轮驱动的第一摇臂;顶端与第二进气门或第二排气门连接,可自由摆动地支持在上述摇臂轴上,由提升量小于第一低提升凸轮的第二低提升凸轮驱动的第三摇臂;设置有可与上述第一摇臂侧连接的顶端,可自由摆动地支持在上述摇臂轴上,由提升量大于上述第一低提升凸轮的高提升凸轮驱动的第二摇臂;设置在上述第一摇臂的基端侧,与凸轮轴的上述第一低提升凸轮靠接的第一滚子从动件;设置在上述第三摇臂的基端侧,与上述凸轮轴的第二低提升凸轮靠接的第三滚子从动件;设置在上述第二摇臂的基端侧,与上述凸轮轴的上述高提升凸轮靠接的第二滚子从动件;及用于切换上述第二摇臂相 To achieve the above object, the present invention is the variable valve driving apparatus comprising: a rocker shaft; top connected to the first intake valve or the exhaust valve of the first, swingably supported on said swing arm shaft, a first low a first lifting cam driven rocker arms; tip of the second intake valve or the second exhaust valve is connected, swingably supported on said swing arm axis, the first amount is less than the low lift by the lifting of the second low lift cam a third cam driven rocker arms; may be provided with a tip connected to the first side of the rocker arm, swingably supported above the rocker shaft, by a high lift cam lift is greater than the first low lift cam drive a second rocker arm; provided at the base end side of the first arm, and the first low-lift cam of a camshaft follower roller against the first contact; provided at the base end of the third arm side, and second low lift cam on the camshaft of a third follower roller contact; provided at the base end side of the second arm, the camshaft and the high lift cam roller against the second contact from the movable member; and means for switching said second rocker arms 对于上述第一摇臂及第三摇臂的连接状态与断开状态的连接切换机构,上述第一滚子从动件与上述第二滚子从动件中的至少上述第二滚子从动件作为使用滚针轴承的滚针滚子形成,并支持在上述第一摇臂的基端侧,上述第三滚子从动件作为双环状滑动滚子形成,并支持在上述第三摇臂的基端侧,如果上述第一低提升凸轮与上述第一滚子从动件的间隔在上述第二低提升凸轮与上述第三滚子从动件的间隔的一半以下,则上述第一滚子从动件选择使用滚针滚子,如果上述第一低提升凸轮与上述第一滚子从动件的间隔在上述第二低提升凸轮与上述第三滚子从动件的间隔的一半以上, 则上述第一滚子从动件选择使用双环状滑动滚子 For the state of the connection and disconnect the first rocker arm and the third arm of the connection switching means, the first follower roller and the second roller follower member at least the second roller follower as the needle roller member used needle bearing is formed, and supports the base end side of the first arm, the third roller follower slide roller as a dual annular form, and supported on said third roll the base end side of the arm, if the interval between the first low-lift cam and the first follower roller in the second half of the interval and the third low lift cam follower roller or less, the first choosing a roller follower needle roller, if the half interval of the first interval of the first low lift cam follower rollers in the second and the third low lift cam follower roller or more, the first follower roller choose bicyclic sliding roller

因此,以提升量更小的第三滚子从动件作为滑动滚子结构,提高冲 Thus, in a third lift amount smaller as the roller follower slide roller structure, improved red

击强度,即使第三滚子从动件以大的力叩击第二低提升凸轮,也能通过表面压力传递力,不会产生变形或压痕,使第三摇臂的相对于旋转的低提升侧的凸轮的靠接部成为对刚性加以考虑的结构,至少相对于高提升凸轮的第二滚子从动件作为滚针滚子,减少摩擦,是对旋转阻力加以考虑的结构,并提高了耐久性。 Impact strength, even if the third sub-follower roller with a large force of tapping second low lift cam, but also through the force transmitting surface pressure, no deformation or indentation, the third arm rotates with respect to low lifting cam side abutment portion becomes a rigid structure to be considered, at least with respect to the second high lift cam follower roller as a needle roller to reduce friction, it is to consider the structure of rotational resistance, and enhance durability.

Claims (1)

  1. 1、内燃机的气门驱动装置,包括: 摇臂轴; 顶端与第一进气门或第一排气门连接,可自由摆动地支持在上述摇臂轴上,由第一低提升凸轮驱动的第一摇臂; 顶端与第二进气门或第二排气门连接,可自由摆动地支持在上述摇臂轴上,由提升量小于第一低提升凸轮的第二低提升凸轮驱动的第三摇臂; 设置有可与上述第一摇臂侧连接的顶端,可自由摆动地支持在上述摇臂轴上,由提升量大于上述第一低提升凸轮的高提升凸轮驱动的第二摇臂; 设置在上述第一摇臂的基端侧,与凸轮轴的上述第一低提升凸轮靠接的第一滚子从动件; 设置在上述第三摇臂的基端侧,与上述凸轮轴的第二低提升凸轮靠接的第三滚子从动件; 设置在上述第二摇臂的基端侧,与上述凸轮轴的上述高提升凸轮靠接的第二滚子从动件;及用于切换上述第二摇臂相对于上述第一摇臂 1, the variable valve driving apparatus, comprising: a rocker shaft; top connected to the first intake valve or the exhaust valve of the first, swingably supported above the rocker arm shaft, driven by the first low lift cam section a swing arm; a second tip connected to the second intake valve or exhaust valve, swingably supported above the rocker arm shaft, is smaller than the amount of the second low-lift cam lifting a first low lift cam driving third swing arm; may be provided with a tip connected to the first side of the rocker arm, swingably supported above the rocker shaft, by the lift amount is greater than the first low-lift cam of a second high lift cam driven rocker arms; provided at the base end side of the first arm, and the first low-lift cam of a camshaft follower roller against the first contact; provided at the proximal end of the third arm side, with the camshaft second low lift cam follower roller against the third contact; provided at the base end side of the second arm, the camshaft and the high lift cam follower roller against the second contact; and with the switching and the second arm with respect to said first rocker arm 第三摇臂的连接状态与断开状态的连接切换机构, 其特征是, 上述第一滚子从动件与上述第二滚子从动件中的至少上述第二滚子从动件作为使用滚针轴承的滚针滚子形成,上述第三滚子从动件作为双环状滑动滚子形成,如果上述第一低提升凸轮与上述第一滚子从动件的间隔在上述第二低提升凸轮与上述第三滚子从动件的间隔的一半以下,则上述第一滚子从动件选择使用滚针滚子,如果上述第一低提升凸轮与上述第一滚子从动件的间隔在上述第二低提升凸轮与上述第三滚子从动件的间隔的一半以上,则上述第一滚子从动件选择使用双环状滑动滚子。 Connect and disconnect a connection state of the switching mechanism of the third arm, wherein the first follower roller and the second roller follower member at least the second roller follower as used needle roller needle bearing is formed, the third roller follower slide roller member is formed as a dual ring, the second low if the first interval of the first low lift cam follower rollers in and the third lifting cam follower rollers spaced less than half, the first follower roller choosing needle roller, if the first low-lift cam and the first follower roller in more than half the interval of the second interval and the third low lift cam follower roller, the first roller follower choose bicyclic sliding roller.
CN 200310121438 2002-12-17 2003-12-16 Air valve driver for IC engine CN100393987C (en)

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JP2014515456A (en) * 2011-05-26 2014-06-30 ジェイコブス ビークル システムズ、インコーポレイテッド Major rocker arm / auxiliary rocker arm assembly for operating the engine valve
JP6090230B2 (en) * 2014-05-14 2017-03-08 トヨタ自動車株式会社 Variable valve device of the control apparatus and an internal combustion engine of the internal combustion engine

Citations (3)

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Publication number Priority date Publication date Assignee Title
US4727831A (en) 1985-07-31 1988-03-01 Honda Giken Kogyo Kabushiki Kaisha Valve operating mechanism for internal combustion engine
US5553584A (en) 1993-12-24 1996-09-10 Honda Giken Kogyo Kabushiki Kaisha Valve operating device for internal combustion engine
CN1301912A (en) 1999-12-28 2001-07-04 本田技研工业株式会社 Valve operation system in IC engine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4727831A (en) 1985-07-31 1988-03-01 Honda Giken Kogyo Kabushiki Kaisha Valve operating mechanism for internal combustion engine
US5553584A (en) 1993-12-24 1996-09-10 Honda Giken Kogyo Kabushiki Kaisha Valve operating device for internal combustion engine
CN1301912A (en) 1999-12-28 2001-07-04 本田技研工业株式会社 Valve operation system in IC engine

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