CN101078375A - Gasoline engine valve lift and the phase variable system - Google Patents

Gasoline engine valve lift and the phase variable system Download PDF

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Publication number
CN101078375A
CN101078375A CN 200710129631 CN200710129631A CN101078375A CN 101078375 A CN101078375 A CN 101078375A CN 200710129631 CN200710129631 CN 200710129631 CN 200710129631 A CN200710129631 A CN 200710129631A CN 101078375 A CN101078375 A CN 101078375A
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valve
varying
lift
arm
model
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CN 200710129631
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Chinese (zh)
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赵辉
张志福
汤绪雯
王孟轲
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奇瑞汽车有限公司
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/10Internal combustion engine [ICE] based vehicles
    • Y02T10/12Technologies for the improvement of indicated efficiency of a conventional ICE
    • Y02T10/128Methods of operating, e.g. homogeneous charge compression ignition [HCCI], premixed charge compression ignition [PCCI]
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/10Internal combustion engine [ICE] based vehicles
    • Y02T10/18Varying inlet or exhaust valve operating characteristics

Abstract

The invention discloses a lift and phase varying system of gasoline engine valve, comprising cylinder cover, cam shaft, varying swing arm, varying valve phaser and oil way so on. Two cams with different profile line are set on the cam shaft. By the varying valve timing technology of acting with different swing arms in varying swing arm mechanism and cooperating with the varying valve phaser the control for lift and phase of engine valve can be realized. When it is short lift inner cam drives inner swinging arm drive the valve and when it is long lift outer cam drives outer swinging arm drive the valve. So the valve lift is changed and the valve phase is optimized. The invention can be applied in single-cylinder machine or multi-cylinder machine. It is mainly used in the switch between HCCI ignition model and SI ignition model. In high load or cold starting it is switched in SI model to work by the system but in low load or under the better road condition it can be switched in HCCI model to work.

Description

汽油发动机气门升程和相位可变系统 Gasoline engine valve lift and the phase variable system

技术领域 FIELD

本发明涉及一种新型汽油发动机气门升程和相位可变系统,特别涉及一种采用双凸轮轴、可变摇臂和可变气门相位的系统,可以实现均质压燃HCCI和火花点火SI两种不同燃烧模式的稳态切换。 The present invention relates to a novel gasoline engine variable valve lift and the phase of the system, particularly to a dual camshaft, the rocker arm and variable valve system variable phase, homogeneous charge compression ignition can be achieved HCCI and SI two spark ignition steady different kinds of combustion mode switching.

背景技术 Background technique

目前人类正面临全球暖化、能源耗竭、大气污染等多重压力,均质充量压缩点燃式发动机兼具节能、环保两大优势,有很好的发展前景。 At present mankind is facing global warming, energy depletion, air pollution and other multiple pressures, homogeneous charge compression ignition engine combines energy-saving, environmental protection two major advantages, there are good prospects for development. HCCI发动机在部分负荷工况采用均质压燃稀薄燃烧方式,可以使发动机实现无烟燃烧(均匀混合气)、极低的NOx排放(燃烧温度低)和较高的热效率(绝热指数大和无节流损失),因此HCCI发动机在节能和降低有害物排放两方面都具有优势,是一种非常理想的燃烧模式。 HCCI engine at part load operating conditions employed HCCI lean combustion, the engine can achieve smokeless combustion (homogeneous air-fuel mixture), very low NOx emission (low combustion temperatures) and higher thermal efficiency (adiabatic index Yamato nauplii flow losses), thus saving in HCCI engines and reduce harmful emissions has two advantages, an ideal combustion mode.

由于HCCI只能在中小负荷工况下使用,在冷启动和大负荷工况下仍需使用火花点火即SI燃烧模式。 Since HCCI only be used in small and medium-load operation, still using the SI combustion mode spark ignition i.e. a cold start and high load conditions. 所以实现HCCI发动机产业化的重点之一是解决HCCI/SI两种燃烧模式的平稳切换。 So one of the key to achieve the industrialization of the HCCI engine is smooth handover solution HCCI / SI two combustion modes. 切换的难点在于在高度动态的过程中如何保持油、气的配合,从而避免异常燃烧现象的发生。 The difficulty is how to maintain the switching complex oil and gas in the highly dynamic process, thereby avoiding abnormal combustion phenomenon.

发明内容 SUMMARY

本发明所要解决的技术问题是:提供一种可变气门升程和可变气门相位系统,在HCCI发动机上实现HCCI燃烧模式和SI燃烧模式的相互切换。 The present invention solves the technical problem are: to provide a variable valve lift and the valve phase variable system, switching between the combustion mode and SI combustion mode of the HCCI engine in HCCI. 在冷启动和极小负荷时,采用SI模式工作,在中小负荷时,采用HCCI工作模式,而在大负荷时,仍采用SI模式工作。 At cold start and a very small load, in SI mode operation, when the load is small, the use of HCCI mode, and when the load is large, still in SI mode.

本发明中发动机气门升程和相位可变系统,包括缸盖、可变摇臂、可变气门正时机构、油路、双凸轮轴等,其特征在于:在凸轮轴上装有两个型线不同的凸轮,通过与可变摇臂机构中不同的摇臂作用并配合可变气门相位器可变气门正时技术实现对发动机气门升程和相位的控制,短升程时内凸轮驱动内摇臂来驱动气门,长升程时外凸轮驱动外摇臂来驱动气门,达到不同的升程和相位。 In the present invention, the engine valve lift and variable phase system, comprising a cylinder head, rocker variable, the variable valve timing mechanism, an oil passage, two camshafts, characterized in that: with two profile on the camshaft different cams of different techniques to achieve the effect of variable rocker arm and the rocker arm mechanism in the variable valve phase with a variable valve timing of the engine valve lift and the phase of the control routine, when the inner lift cam driven rocker short a valve arm is driven, the cam drive outside outer rocker arm to drive a long lift of the valve, to achieve different lift and the phase.

在本发明中,通过可变气门相位器系统来调整相位。 In the present invention, the phase is adjusted by the variable valve phase system.

在本发明中,应用液压油路系统来控制摇臂从而切换凸轮的锁定或解锁,实现停缸或不同气门升程的切换,切换迅速,圆滑,两个凸轮可以平稳切换。 In the present invention, the application of hydraulic oil system to control the rocker arm thereby locking or unlocking the switching cams, and stop of a cylinder or a different valve lift switch, switch quickly, smoothly, two cams can be smoothly switched.

在本发明中,在冷启动和大负荷时,采用SI模式工作,在中小负荷时,采用HCCI模式工作。 In the present invention, when a large load and cold start, in SI mode operation, when the load is small, the use of HCCI mode operation. 通过使用可变气门相位器系统对部分负荷配气相位进行优化,发动机的热效率提高,燃油经济性得到极大改善。 By partial load valve timing to optimize the use of the variable valve phase system, improved engine thermal efficiency, fuel economy is greatly improved.

在本发明中,可安装增压器,对进气进行增压,更有利于HCCI负荷范围拓宽及SI模式下的功率输出。 In the present invention, the supercharger may be installed, supercharging the intake air, HCCI is more conducive to the power output load range broadening and SI mode.

本发明可用于单缸机或是多缸机上综合上述,本发明相对于现有技术、具有如下的有益效果:(1)冷启动和大负荷采用SI模式工作。 The present invention can be used on single-cylinder or multi-cylinder machines In summary, the present invention relative to the prior art, has the following advantages: (1) a large load and cold start in SI mode.

(2)中小荷采用HCCI模式工作。 (2) using the Lotus HCCI mode operation.

(3)排气温度降低,发动机热负荷减小,耐久性提高。 (3) decreases the exhaust gas temperature, the thermal load of the engine is reduced, the durability is improved.

(4)可以实现HCCI模式和SI模式之间的平稳过度,切换过程平稳柔和,响应迅速准确,控制简单。 (4) can achieve a smooth transition between the HCCI and SI modes mode, smooth soft handover process, fast response and accurate, simple control.

附图说明 BRIEF DESCRIPTION

下面结合附图和具体的实施方式,对本发明作进一步的详细描述:图1是可变气门升程和相位系统结构及原理说明简图图2是可变摇臂俯视简图图3是液压油路控制简图图4是可变摇臂结构示意图图5是双凸轮轴示意图图6是可变摇臂液压控制示意图其中:1.凸轮轴;2.销轴;3.复位弹簧;4.气门;5.外凸轮;6.内凸轮;7.外摇臂滑垫;8.内摇臂滚子;9.内摇臂;10.外摇臂;11.弹簧;12.活动锁销;13.油路;14.液压挺柱;15.控制阀1;16.控制阀2;17.控制阀; In conjunction with the accompanying drawings and the following specific embodiments, the present invention will be further described in detail: FIG. 1 is a variable valve lift and the phase diagram of the system structure and principle described in FIG. 2 is a schematic plan view of the rocker arm 3 variable hydraulic oil FIG 4 is a schematic path control variable swing arm 5 is a schematic structural diagram of a double variable camshaft 6 is a diagram of the hydraulic control schematic wherein the rocker arm: a camshaft; pin 2; 3 return spring; 4 valve.. ;. 5 outer cam; 6 inner cam;. glide outer rocker arm 7; 8 inner rocker arm roller;. the rocker arm 9; 10 outer rocker arm;. a spring 11; 12 active lock pin; 13 . oil; 14 hydraulic tappet;. The control valve 15 1; 16 2 control valve;. The control valve 17;

具体实施方式 detailed description

按照图1所示,本发明HCCI工作模式是:锁销12在弹簧11弹力的作用下向内摇臂滚子8方向移动,使内摇臂9和外摇臂10分开,这时摇臂组件中的内摇臂8和外摇臂9由于没有锁销12的固定作用,可以相对移动。 Shown in Figure 1, the HCCI mode of operation of the present invention is: the lock pin 12 inward direction of the rocker arm roller 8 moved by the elastic force of the spring 11, the rocker arm 9 so that the inner and outer rocker arms 10 are separated, then the rocker arm assembly the inner rocker arm 8 and the outer rocker arm 9 because there is no fixation lock pin 12 can be relatively moved. 内摇臂9和外摇臂10是可以绕销轴2相对旋转的。 The outer rocker arm 10 and the rocker arm 9 is rotatable about the pin 2 relative. 虽然此时外摇臂10也是运动的,但是它的运动是一个空运动,不起任何作用,在复位弹簧3弹力的作用下,内摇臂滚子8和双凸轮轴1的接触在双凸轮轴1的基圆部分进时,外摇臂10复位。 While the rocker arm 10 is also moving the outer case, but its movement is a movement of empty, no effect, under the force of the return spring 3, the inner rocker arm roller contact element 8 and a double camshaft in a dual cam when the base circle portion of the shaft 1 into the outer rocker arm 10 is reset. 只有内摇臂9在双凸轮轴1上的内凸轮6的驱动下运动,内摇臂9再驱动气门4运动,这一动作是有效的。 Only the rocker arm 9 in the double camshaft driven inner cam 16 on the movement of the rocker arm 9 which in turn drives the movement of the valve 4, this action is effective. 并通过使用可变气门相位器系统对配气正时进行优化,这种模式是HCCI工作模式。 And timing to optimize gas distribution phase by using the variable valve system, this mode is HCCI mode.

本发明HCCI工作模式是SI工作模式:在液压控制机构的作用下,液压油由油路13进入锁销区,驱动锁销12移动,锁销12克服弹簧11弹力的作用运动,内摇臂9和外摇臂10固连在一起,双凸轮轴1上的外凸轮5与外摇臂的滑垫7接触驱动摇臂组件运动,从而控制气门4的开启和闭合,并过使用可变气门相位器系统对配气正时进行优化,达到一个理想的效果,这种模式是SI工作模式。 HCCI operating mode is the SI mode of the present invention: under the action of hydraulic control means, the hydraulic oil passage 13 into the detent area, driving the lock pin 12 is moved, moving the lock pin 12 against the action of the force of the spring 11, the rocker arm 9 an outer rocker arm 10 and secured together, a double cam on the camshaft 15 outside the slide contact pads outer rocker arm 7 drives the rocker arm assembly movement, thereby controlling the opening and closing valve 4, and by using the variable valve phase system of the valve timing is optimized to achieve a desired effect, this model is the SI mode.

按照图5所示,由于凸轮轴上的内凸轮6和外凸轮5的型线是不一样的,它们的升程也不一样,这样就可以改变气门4的升程,配合可变气门相位器优化气门相位,达到节能环保的目的。 As shown in Figure 5, since the inner and outer cam on the camshaft cam profile 5 is not the same 6, they are not the same lift, the lift can be varied so that the valve 4, with the variable valve phaser valve phase optimization, to achieve the purpose of energy saving.

按照图2所示,内外摇臂的切换是通过液压控制机构控制活动锁销12锁定/解锁来实现的,锁定时内外摇臂一起运动,解锁时内外摇臂可以绕销轴2旋转,外摇臂10的运动是空运动。 As shown in Figure 2, the inner and outer rocker switch is controlled by a hydraulic control mechanism active lock pin 12 locking / unlocking achieved, locking the inner and outer rocker arms move together, the inner and outer rocker arms can rotate about the unlocking pin 2 is rotated, the outer roll movement of the arm 10 is empty motion.

按照图3所示,内摇臂9和外摇臂10工作时有一个共同的支点液压挺柱14,工作过程中摇臂的长度是不会发生变化的,内外摇臂的固连或是相对运动是为了两个凸轮5和6相互转换工作。 As shown in Figure 3, within the rocker arm 9 and has an outer rocker arm 10 operates a hydraulic tappet common pivot 14, the rocker arm during operation of the length is not changed, the inner and outer rocker arms or even relatively solid movement to the two cams 5 and 6 conversion work.

按照图4和图6所示,本发明油路控制是液压挺柱14内有两段油路,且是不相通的,下面的油路是高压油区,通过电磁阀控制上段油路的油压来控制活动锁销12的移动,弹簧座与内摇臂9过盈配合在一起,弹簧座不能移动。 According to FIG. 4 and FIG. 6, the present invention, the control oil passage is an oil passage within the two hydraulic tappet 14, and is not connected, the following passage is a high pressure oil region, the upper oil passage is controlled by a solenoid valve pressure control activities to move the lock pin, and the spring seat 12 of the rocker arm 9 an interference fit together, the spring seat can not be moved. 当液压挺柱14内上段油路没有和高压油路接通时,在弹簧11弹力的作用下,内外摇臂是分开的。 When the hydraulic tappet 14 and the high-pressure upper oil passage is not turned on, the action of the spring force of the spring 11, the inner and outer rocker arms are separated. 当控制阀15闭合控制阀16打开,液压挺柱14内的上段油路和高压油路接通时,高压油进入液压油腔,液压油推动导向活塞移动,导向活塞带动活动锁销12移动而使内外摇臂结合在一起。 When the control valve 16 opens the control valve 15 is closed, the upper hydraulic tappet and a high pressure oil passage in the oil passage 14 is turned on, the high-pressure oil into the hydraulic oil chamber, pushing the guide piston moves hydraulic oil, a piston driven by the guide pin 12 moves the lock activities the inner and outer rocker arms together. 当控制阀15打开,控制阀16闭合时,阻断了挺柱内上段油路与高压油的连通,而挺柱内上段油路与低压油路连通,这时上段油路泄压,活动锁销12在弹簧弹力的作用下移动而使内外摇臂分开。 When the control valve 15 is opened, the control valve 16 is closed, blocking the passage communicates with the upper section of the high-pressure oil in the lifter, and the upper section of the inner passage in communication with the low pressure oil passage lifter, when the relief oil passage section, the active lock pin 12 is moved under the action of the spring force to separate the inner and outer rocker arms.

Claims (2)

  1. 1.一种汽油发动机气门升程和相位可变系统,包括缸盖、凸轮轴、可变摇臂、可变气门相位器、油路,其特征在于:在凸轮轴上装有两个型线不同的凸轮,通过与可变摇臂机构中不同的摇臂作用并配合可变气门相位器可变气门正时技术实现对发动机气门升程和相位的控制,短升程时内凸轮驱动内摇臂来驱动气门,长升程时外凸轮驱动外摇臂来驱动气门。 1. A gasoline engine valve lift and the phase variable system, comprising a cylinder head, a camshaft, a rocker arm of the variable, the variable valve phaser oil passage, characterized in that: with two different profile on the camshaft cams, variable valve technology variable phase shifter and the variable valve rocker arm mechanism and the role of the rocker arm with the different timing of the engine valve lift and the phase of the control routine, when the inner drive cam lift rocker arm short the valve is driven, the cam drive outside outer rocker arm is driven when the length of the valve lift.
  2. 2.根据权利要求1所述的汽油发动机气门升程和相位可变系统,其特征是:应用液压油路系统来控制摇臂从而切换凸轮的锁定或解锁,实现停缸或不同气门升程的切换。 The gasoline engine 1, the valve lift and the phase variable system, as claimed in claim wherein: to control the application of hydraulic oil system thereby locking or unlocking the switching rocker cam, or cylinder deactivation to achieve different valve lift switch.
CN 200710129631 2007-07-27 2007-07-27 Gasoline engine valve lift and the phase variable system CN101078375A (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100572764C (en) 2008-08-08 2009-12-23 冯子光 Variable air valve apparatus of engine
CN101956584A (en) * 2010-10-15 2011-01-26 奇瑞汽车股份有限公司 Driving oil way of variable valve mechanism with VVT and VVL system
CN102296997A (en) * 2011-08-02 2011-12-28 天津大学 Variable valve timing mechanism for an engine hcci
CN102400734A (en) * 2011-11-15 2012-04-04 中国嘉陵工业股份有限公司(集团) Engine valve lift variable device
CN101699040B (en) 2009-10-26 2012-07-25 清华大学 Two-stage variable compression ratio system of gasoline engine and control method thereof
CN102094692B (en) 2009-12-11 2013-01-02 吴爽 Steplessly variable valve lift mechanism and control method
CN101910570B (en) 2008-01-16 2013-05-01 通用汽车环球科技运作公司 Sliding-pivot locking mechanism for an overhead cam with multiple rocker arms
CN103221645A (en) * 2010-03-19 2013-07-24 伊顿公司 Switching rocker arm
CN104421007A (en) * 2013-09-10 2015-03-18 谢庆生 Adjustment method and device for independently and continuously adjusting gas distribution phase and gas valve lift
CN106368754A (en) * 2016-08-29 2017-02-01 潍柴动力股份有限公司 Intake valve device, air distribution system and air distribution phase switching method

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101910570B (en) 2008-01-16 2013-05-01 通用汽车环球科技运作公司 Sliding-pivot locking mechanism for an overhead cam with multiple rocker arms
CN100572764C (en) 2008-08-08 2009-12-23 冯子光 Variable air valve apparatus of engine
CN101699040B (en) 2009-10-26 2012-07-25 清华大学 Two-stage variable compression ratio system of gasoline engine and control method thereof
CN102094692B (en) 2009-12-11 2013-01-02 吴爽 Steplessly variable valve lift mechanism and control method
CN103221645A (en) * 2010-03-19 2013-07-24 伊顿公司 Switching rocker arm
CN103221645B (en) * 2010-03-19 2015-11-25 伊顿公司 Conversion rocker
CN101956584A (en) * 2010-10-15 2011-01-26 奇瑞汽车股份有限公司 Driving oil way of variable valve mechanism with VVT and VVL system
CN101956584B (en) 2010-10-15 2013-06-12 奇瑞汽车股份有限公司 Driving oil way of variable valve mechanism with VVT and VVL system
CN102296997A (en) * 2011-08-02 2011-12-28 天津大学 Variable valve timing mechanism for an engine hcci
CN102400734A (en) * 2011-11-15 2012-04-04 中国嘉陵工业股份有限公司(集团) Engine valve lift variable device
CN104421007A (en) * 2013-09-10 2015-03-18 谢庆生 Adjustment method and device for independently and continuously adjusting gas distribution phase and gas valve lift
CN106368754A (en) * 2016-08-29 2017-02-01 潍柴动力股份有限公司 Intake valve device, air distribution system and air distribution phase switching method

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