WO2011054249A1 - 一种汽车发动机气门升程两级可调的配气方法及装置 - Google Patents

一种汽车发动机气门升程两级可调的配气方法及装置 Download PDF

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Publication number
WO2011054249A1
WO2011054249A1 PCT/CN2010/077873 CN2010077873W WO2011054249A1 WO 2011054249 A1 WO2011054249 A1 WO 2011054249A1 CN 2010077873 W CN2010077873 W CN 2010077873W WO 2011054249 A1 WO2011054249 A1 WO 2011054249A1
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Prior art keywords
cam
camshaft
valve
hole
automobile engine
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PCT/CN2010/077873
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English (en)
French (fr)
Inventor
刘和义
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奇瑞汽车股份有限公司
芜湖普威技研有限公司
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Publication of WO2011054249A1 publication Critical patent/WO2011054249A1/zh

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02Valve drive
    • F01L1/04Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047Camshafts
    • F01L1/053Camshafts overhead type
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0005Deactivating valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12Transmitting gear between valve drive and valve
    • F01L1/18Rocking arms or levers
    • F01L1/185Overhead end-pivot rocking arms
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/20Adjusting or compensating clearance
    • F01L1/22Adjusting or compensating clearance automatically, e.g. mechanically
    • F01L1/24Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
    • F01L1/2405Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically by means of a hydraulic adjusting device located between the cylinder head and rocker arm
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02Valve drive
    • F01L1/04Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047Camshafts
    • F01L2001/0475Hollow camshafts
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2305/00Valve arrangements comprising rollers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2800/00Methods of operation using a variable valve timing mechanism
    • F01L2800/06Timing or lift different for valves of same cylinder
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L3/00Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L3/22Valve-seats not provided for in preceding subgroups of this group; Fixing of valve-seats

Definitions

  • the invention relates to a two-stage adjustable gas distribution method and device for automobile engine valve lift, belonging to the technical field of mechanical manufacturing. Background technique
  • the technical problem to be solved by the present invention is to provide a two-stage adjustable gas distribution method and device for automobile engine valve lift, which is simple and reliable in valve lift switching, and effectively improves engine performance.
  • the invention provides a two-stage adjustable gas distribution method for a valve lift of an automobile engine.
  • the camshaft is provided with a main cam, and the main cam can rotate with the camshaft to control the first valve, and the camshaft is further provided.
  • the sub cam When it is necessary to open a valve, the sub cam does not rotate with the cam shaft by controlling the oil pressure in the oil hole.
  • the secondary cam is rotated with the camshaft by controlling the oil pressure in the oil hole.
  • the cam shaft is provided with a mounting hole, the piston pin is disposed in the mounting hole, and the mounting hole is connected with the oil hole; the auxiliary cam is provided with a positioning hole, and the return spring is disposed in the positioning hole.
  • An axial positioning groove is arranged in the auxiliary cam.
  • the main cam and the secondary cam can control the opening of the corresponding valve through a rocker arm, a mechanical tappet or a hydraulic tappet.
  • the invention also provides a device for realizing the two-stage adjustable gas distribution method of the above-mentioned automobile engine valve lift, convex
  • the main shaft is disposed on the axle, the main cam can control the opening of the first valve, the cam shaft is further provided with a secondary cam for controlling the second valve;
  • the cam shaft is provided with an oil hole, and the cam shaft is provided with a mounting hole, the installation The hole is connected with the oil hole, and the piston pin is disposed in the mounting hole;
  • the auxiliary cam is correspondingly provided with a positioning hole, and the return spring is disposed in the positioning hole.
  • An axial positioning groove is arranged in the auxiliary cam.
  • the main cam and the secondary cam can control the opening of the corresponding valve through a rocker arm, a mechanical tappet or a hydraulic tappet.
  • the camshaft of the invention is provided with an oil hole, and the oil pressure in the oil hole is controlled to control whether the auxiliary cam rotates with the camshaft, thereby controlling whether the second valve is opened or not, and the two-stage adjustment of the valve lift is realized, which satisfies the high speed and Low-speed engines have different requirements for valve lift, improve engine performance, and effectively reduce emissions.
  • valve lift switching of the invention is simple and reliable, and can effectively reduce pumping loss, reduce fuel consumption, and improve the low-end torque of the engine.
  • the invention has a simple and compact structure, and has a small amount of modification to the existing structure of the engine, and is suitable for product upgrading.
  • FIG. 1 is a schematic structural view of a valve train of the present invention
  • Figure 2 is a schematic view of the combined cam structure
  • Figure 3 is a cross-sectional view taken along the line A when the sub cam does not rotate with the cam shaft;
  • Figure 4 is a cross-sectional view of the secondary cam as it rotates with the camshaft
  • Figure 5 is a schematic structural view of a camshaft
  • Figure 6 is a schematic view showing the structure of the sub cam. detailed description
  • FIG. 1 is a schematic structural view of a valve train of the present invention
  • FIG. 2 is a schematic view of a combined cam structure.
  • the cam shaft 1 is provided with a main cam 5 which can control the opening of the first valve 3.
  • the camshaft 1 is also provided with a secondary cam 6 for controlling the second valve 4, and an oil hole 10 is provided in the camshaft 1.
  • the main cam 5 and the sub cam 6 control the opening of the corresponding valve through the rocker arm 2.
  • the main cam 5 and the sub cam 6 can also control the opening of the corresponding valve by other mechanical components such as a mechanical tappet or a hydraulic tappet.
  • FIG. 3 is a cross-sectional view of the sub cam when it is not rotated with the cam shaft;
  • FIG. 4 is a cross-sectional view of the cam when the cam is rotated with the cam shaft;
  • FIG. 5 is a schematic structural view of the cam shaft;
  • the camshaft 1 is provided with a mounting hole 9, the mounting hole 9 is in communication with the oil hole 10, and the piston pin 7 is disposed in the mounting hole 9.
  • the sub cam 6 is correspondingly provided with a positioning hole 11
  • the return spring 8 is disposed in the positioning hole 11
  • the auxiliary cam 12 is provided with an axial positioning groove 12 .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)

Description

一种汽车发动机气门升程两级可调的配气方法及装置 技术领域
本发明涉及一种汽车发动机气门升程两级可调的配气方法及装置, 属于机械制造 技术领域。 背景技术
现有发动机具有固定的配气正时和气门升程, 随着发动机转速的提高和日益增长 的油价, 对发动机的性能和油耗提出了更高的要求。 为了满足发动机不同工况对气门 升程的要求, 要求气门升程可变。 发明内容
本发明的所要解决的技术问题在于, 提供一种汽车发动机气门升程两级可调的配 气方法及装置, 气门升程切换简单可靠, 有效提高发动机性能。
本发明所要解决的技术问题是通过如下技术方案实现的:
本发明提供一种汽车发动机气门升程两级可调的配气方法,凸轮轴上设有主凸轮, 主凸轮可随凸轮轴转动, 从而对第一气门进行控制, 所述凸轮轴上还设有副凸轮, 凸 轮轴内设有油孔, 通过控制油孔内的油压实现对副凸轮运动的控制, 从而控制第二气 门的开启, 实现气门升程两级可调。
当需要打开一个气门时, 通过控制油孔内的油压使副凸轮不随凸轮轴转动。
当需要打开两个气门时, 通过控制油孔内的油压使副凸轮随凸轮轴转动。
凸轮轴上设有安装孔, 活塞销设置于安装孔内, 安装孔与油孔连通; 副凸轮相应 设有定位孔, 回位弹簧设置于定位孔内。
控制凸轮轴油孔内油压, 油压增高时, 油压将活塞销压下, 使得副凸轮随凸轮轴 转动。
控制凸轮轴油孔内油压, 油孔内没有油压时, 在回位弹簧的作用下, 活塞销复位, 使得副凸轮不随凸轮轴转动。
副凸轮内设有轴向定位槽。
主凸轮、 副凸轮可通过摇臂、 机械挺柱或液压挺柱控制相应气门的开启。
本发明还提供一种实现前述汽车发动机气门升程两级可调的配气方法的装置, 凸 轮轴上设有主凸轮, 主凸轮可控制第一气门的开启, 所述凸轮轴上还设有用于控制第 二气门的副凸轮; 凸轮轴内设有油孔, 凸轮轴设有安装孔, 安装孔与油孔连通, 活塞 销设置于安装孔内; 副凸轮相应设有定位孔, 回位弹簧设置于定位孔内。
副凸轮内设有轴向定位槽。
主凸轮、 副凸轮可通过摇臂、 机械挺柱或液压挺柱控制相应气门的开启。
本发明具有的有益效果:
本发明凸轮轴内设有油孔, 通过控制油孔内油压, 控制副凸轮是否随凸轮轴转动, 从而对第二气门是否开启进行控制, 实现气门升程的两级可调, 满足高速和低速的发 动机对气门升程的不同要求, 提高发动机性能, 有效降低排放。
本发明气门升程切换简单、 可靠, 能够有效减少泵气损失、 降低油耗、 提高发动 机的低端扭矩。 同时, 本发明结构简单、 紧凑, 对发动机现有结构的改动量小, 适合 产品升级。 附图说明
图 1为本发明配气机构的结构示意图;
图 2为组合凸轮结构示意图;
图 3为副凸轮不随凸轮轴转动时的 A向剖视图;
图 4为副凸轮随凸轮轴转动时的 A向剖视图;
图 5为凸轮轴的结构示意图;
图 6为副凸轮的结构示意图。 具体实施方式
图 1为本发明配气机构的结构示意图, 图 2为组合凸轮结构示意图。 如图 1、 图 2 所示, 凸轮轴 1上设有主凸轮 5, 主凸轮 5可控制第一气门 3的开启。 凸轮轴 1上还 设有控制第二气门 4的副凸轮 6, 凸轮轴 1 内设有油孔 10。 主凸轮 5、 副凸轮 6通过 摇臂 2控制相应气门的开启。 除了摇臂 2之外, 主凸轮 5、 副凸轮 6还可以通过机械 挺柱或液压挺柱等其他机械元件控制相应气门的开启。
图 3为副凸轮不随凸轮轴转动时的 A向剖视图; 图 4为副凸轮随凸轮轴转动时的 A向剖视图; 图 5为凸轮轴的结构示意图; 图 6为副凸轮的结构示意图。 如图 3-图 6 所示, 凸轮轴 1上设有安装孔 9, 安装孔 9与油孔 10连通, 活塞销 7设置于安装孔 9 内。 副凸轮 6相应设有定位孔 11, 回位弹簧 8设置于定位孔 11 内, 副凸轮 6内设有 轴向定位槽 12。
如图 4所示, 当发动机的运行工况需要两个气门同时打开时, 控制凸轮轴 1的油 孔 10内油压, 使油压增高, 活塞销 7在油压的作用下,推动回位弹簧 8并压紧, 此时, 活塞销 7有一部分位于副凸轮 6的定位孔 11内, 使得副凸轮 6随凸轮轴 1一起转动, 从而使第二气门 4开启。 同时, 主凸轮 5随凸轮轴 1转动, 使第一气门 3开启。
如图 3所示, 当发动机只需要一个气门打开时, 关闭凸轮轴 1的油孔 10内油压, 回位弹簧 8顶住活塞销 7回位到凸轮轴 1的安装孔 9内。 此时, 凸轮轴 1只能带动主 凸轮 5转动, 将第一气门 3开启。 凸轮轴 1与副凸轮 6之间产生相对运动, 副凸轮 6 不随凸轮轴 1转动, 相应第二气门 4关闭。
最后所应说明的是: 以上实施例仅用以说明本发明而非限制, 尽管参照较佳实施 例对本发明进行了详细说明, 本领域的普通技术人员应当理解, 可以对本发明进行修 改或者等同替换, 而不脱离本发明的精神和范围, 其均应涵盖在本发明的权利要求范 围当中。

Claims

权利要求书
1、一种汽车发动机气门升程两级可调的配气方法, 凸轮轴(1)上设有主凸轮(5), 主凸轮 (5) 可随凸轮轴 (1) 转动, 从而对第一气门 (3) 进行控制, 其特征在于: 凸 轮轴 (1) 上还设有副凸轮 (6), 凸轮轴 (1) 内设有油孔 (10), 通过控制油孔 (10) 内的油压实现对副凸轮 (6) 运动的控制, 从而控制第二气门 (4) 的开启, 实现气门 升程两级可调。
2、根据权利要求 1所述的汽车发动机气门升程两级可调的配气方法,其特征在于: 当需要打开一个气门时, 通过控制油孔 (10) 内的油压使副凸轮 (6) 不随凸轮轴 (1) 转动。
3、根据权利要求 2所述的汽车发动机气门升程两级可调的配气方法,其特征在于: 当需要打开两个气门时, 通过控制油孔 (10) 内的油压使副凸轮 (6) 随凸轮轴 (1) 转动。
4、根据权利要求 3所述的汽车发动机气门升程两级可调的配气方法,其特征在于: 凸轮轴 (1) 上设有安装孔 (9), 活塞销 (7) 设置于安装孔 (9) 内, 安装孔 (9) 与 油孔(10)连通; 副凸轮(6)相应设有定位孔(11), 回位弹簧(8)设置于定位孔(11) 内。
5、根据权利要求 4所述的汽车发动机气门升程两级可调的配气方法,其特征在于: 控制凸轮轴 (1) 的油孔 (10) 内油压, 油压增高时, 油压将活塞销 (7) 压下, 使得 副凸轮 (6) 随凸轮轴 (1) 转动。
6、根据权利要求 5所述的汽车发动机气门升程两级可调的配气方法,其特征在于: 控制凸轮轴 (1) 的油孔 (10) 内油压, 油孔 (10) 内没有油压时, 在回位弹簧 (8) 的作用下, 活塞销 (7) 复位, 使得副凸轮 (6) 不随凸轮轴 (1) 转动。
7、根据权利要求 6所述的汽车发动机气门升程两级可调的配气方法,其特征在于: 副凸轮 (6) 内设有轴向定位槽 (12)。
8、根据权利要求 7所述的汽车发动机气门升程两级可调的配气方法,其特征在于: 主凸轮(5)、 副凸轮(6)可通过摇臂(2)、 机械挺柱或液压挺柱控制相应气门的开启。
9、一种实现权利要求 1所述的汽车发动机气门升程两级可调配气方法的装置, 凸 轮轴 (1)上设有主凸轮(5), 主凸轮(5)可控制第一气门 (3) 的开启, 其特征在于: 凸轮轴(1)上还设有控制第二气门 (4) 的副凸轮(6); 凸轮轴(1) 内设有油孔(10), 凸轮轴 (1) 设有安装孔 (9), 安装孔 (9) 与油孔 (10) 连通, 活塞销 (7) 设置于安 装孔 (9) 内; 副凸轮 (6) 相应设有定位孔 (11), 回位弹簧 (8) 设置于定位孔 (11) 内。
10、 根据权利要求 9所述的汽车发动机气门升程两级可调的配气装置, 其特征在 于: 副凸轮 (6) 内设有轴向定位槽 (12)。
11、根据权利要求 10所述的汽车发动机气门升程两级可调的配气装置, 其特征在 于: 主凸轮 (5)、 副凸轮 (6) 可通过摇臂 (2)、 机械挺柱或液压挺柱控制相应气门的 开启。
PCT/CN2010/077873 2009-11-03 2010-10-19 一种汽车发动机气门升程两级可调的配气方法及装置 WO2011054249A1 (zh)

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CN101705852A (zh) * 2009-11-03 2010-05-12 奇瑞汽车股份有限公司 一种汽车发动机气门升程两级可调的配气方法及装置
CN110925043A (zh) * 2019-11-28 2020-03-27 哈尔滨东安汽车动力股份有限公司 一种斜置发动机使用滚子摇臂、机械挺柱结构
CN111911257A (zh) * 2020-06-30 2020-11-10 中国北方发动机研究所(天津) 一种组合式配气凸轮轴

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KR20090062258A (ko) * 2007-12-12 2009-06-17 현대자동차주식회사 가변 캠 시스템
CN101705852A (zh) * 2009-11-03 2010-05-12 奇瑞汽车股份有限公司 一种汽车发动机气门升程两级可调的配气方法及装置

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JPH074217A (ja) * 1993-04-14 1995-01-10 Toyota Autom Loom Works Ltd 可変バルブリフト機構付きカムシャフト
JPH07166829A (ja) * 1993-12-10 1995-06-27 Komatsu Ltd 弁装置
KR20090062258A (ko) * 2007-12-12 2009-06-17 현대자동차주식회사 가변 캠 시스템
CN101457678A (zh) * 2008-12-31 2009-06-17 奇瑞汽车股份有限公司 一种新型的可变气门升程配气机构
CN101705852A (zh) * 2009-11-03 2010-05-12 奇瑞汽车股份有限公司 一种汽车发动机气门升程两级可调的配气方法及装置

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