CN107000530B - 动态重量转移悬架系统 - Google Patents

动态重量转移悬架系统 Download PDF

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CN107000530B
CN107000530B CN201580066750.1A CN201580066750A CN107000530B CN 107000530 B CN107000530 B CN 107000530B CN 201580066750 A CN201580066750 A CN 201580066750A CN 107000530 B CN107000530 B CN 107000530B
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air bag
port
suspension system
dynamic weight
air
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CN107000530A (zh
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C·D·布勒星
C·P·勒瓦克
J·M·希德斯
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Dena Heavy Vehicle Systems Group Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G17/00Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
    • B60G17/015Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
    • B60G17/016Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by their responsiveness, when the vehicle is travelling, to specific motion, a specific condition, or driver input
    • B60G17/0164Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by their responsiveness, when the vehicle is travelling, to specific motion, a specific condition, or driver input mainly during accelerating or braking
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G17/00Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
    • B60G17/02Spring characteristics, e.g. mechanical springs and mechanical adjusting means
    • B60G17/04Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics
    • B60G17/052Pneumatic spring characteristics
    • B60G17/0523Regulating distributors or valves for pneumatic springs
    • B60G17/0525Height adjusting or levelling valves
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G17/00Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
    • B60G17/015Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
    • B60G17/0152Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the action on a particular type of suspension unit
    • B60G17/0155Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the action on a particular type of suspension unit pneumatic unit
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G17/00Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
    • B60G17/015Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
    • B60G17/018Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the use of a specific signal treatment or control method
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G17/00Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
    • B60G17/02Spring characteristics, e.g. mechanical springs and mechanical adjusting means
    • B60G17/04Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics
    • B60G17/052Pneumatic spring characteristics
    • B60G17/0523Regulating distributors or valves for pneumatic springs
    • B60G17/0528Pressure regulating or air filling valves
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G5/00Resilient suspensions for a set of tandem wheels or axles having interrelated movements
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G2200/00Indexing codes relating to suspension types
    • B60G2200/40Indexing codes relating to the wheels in the suspensions
    • B60G2200/422Driving wheels or live axles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G2202/00Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/10Type of spring
    • B60G2202/15Fluid spring
    • B60G2202/152Pneumatic spring
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/62Adjustable continuously, e.g. during driving
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/011Modular constructions
    • B60G2206/0116Integrated distribution control units with valves, accumulators, PCB's or the like
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G2300/00Indexing codes relating to the type of vehicle
    • B60G2300/02Trucks; Load vehicles
    • B60G2300/026Heavy duty trucks
    • B60G2300/0262Multi-axle trucks
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G2400/00Indexing codes relating to detected, measured or calculated conditions or factors
    • B60G2400/25Stroke; Height; Displacement
    • B60G2400/252Stroke; Height; Displacement vertical
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G2400/00Indexing codes relating to detected, measured or calculated conditions or factors
    • B60G2400/30Propulsion unit conditions
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G2400/00Indexing codes relating to detected, measured or calculated conditions or factors
    • B60G2400/50Pressure
    • B60G2400/51Pressure in suspension unit
    • B60G2400/512Pressure in suspension unit in spring
    • B60G2400/5122Fluid spring
    • B60G2400/51222Pneumatic
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G2500/00Indexing codes relating to the regulated action or device
    • B60G2500/20Spring action or springs
    • B60G2500/201Air spring system type
    • B60G2500/2012Open systems
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G2500/00Indexing codes relating to the regulated action or device
    • B60G2500/20Spring action or springs
    • B60G2500/202Height or leveling valve for air-springs
    • B60G2500/2021Arrangement of valves
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G2500/00Indexing codes relating to the regulated action or device
    • B60G2500/20Spring action or springs
    • B60G2500/204Pressure regulating valves for air-springs
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G2500/00Indexing codes relating to the regulated action or device
    • B60G2500/30Height or ground clearance
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G2800/00Indexing codes relating to the type of movement or to the condition of the vehicle and to the end result to be achieved by the control action
    • B60G2800/18Starting, accelerating
    • B60G2800/182Traction
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G2800/00Indexing codes relating to the type of movement or to the condition of the vehicle and to the end result to be achieved by the control action
    • B60G2800/21Traction, slip, skid or slide control
    • B60G2800/214Traction, slip, skid or slide control by varying the load distribution
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G2800/00Indexing codes relating to the type of movement or to the condition of the vehicle and to the end result to be achieved by the control action
    • B60G2800/90System Controller type
    • B60G2800/91Suspension Control
    • B60G2800/915Suspension load distribution

Abstract

一种用于转移车辆上的串联桥负载的动态重量转移悬架系统。该系统包括连接在串联桥的驱动桥和车架之间的第一气囊和连接在串联桥的支持桥和车架之间的第二气囊。该系统还具有包括至少一个端口和至少一个螺线管的机电控制单元。该机电控制单元经由流体连通管线与气囊和气源直接流体连通。

Description

动态重量转移悬架系统
相关申请
本申请要求2014年12月12日提交的美国专利申请序列No.62/090,903的优先权和权益,所述专利当前正在待审并且其全部内容在此引入作为参考。
技术领域
本发明涉及一种用于商用车辆长途运输牵引车的串联桥的空气转移悬架系统。
背景技术
典型的北美Class 8长途运输卡车使用6x4牵引车,其具有在牵引车后串联桥中的两个驱动桥。6x2动力传动系具有以后串联的单驱动桥和静支持桥。相比于6x4系统,6x2系统较轻并且具有较低的附加损失,但是由于驱动桥和支持桥将具有相同的负载,此系统在轮胎与地面摩擦系数减小的情况下具有牵引力的缺陷。
已经提供了用以增加6x2单驱动桥牵引力的系统,诸如车轮差速锁止器和基于伺服制动的电子牵引控制系统。此外,可利用6x2空气悬架系统,其在低牵引力情况下可自动地将负载从支持桥转移到驱动桥以提高驱动桥的牵引力,但是这些系统作用缓慢、昂贵且繁琐。
鉴于现有技术的前述缺点,具有作用快、成本有效以及易于合并的低成本系统将是有利的,该系统可安全且有效地提高6x2驱动桥的牵引力。
发明的公开
本发明涉及一种用于转移车辆上的串联桥负载的系统。具体地,该系统将重量从支持桥转移到驱动桥并且反之亦然。系统包括连接在串联桥的驱动桥和车架之间的第一气囊和连接在串联桥的支持桥和车架之间的第二气囊。系统还具有机电控制单元,所述机电控制单元包括至少一个端口和至少一个螺线管。机电控制单元经由流体连通管线与气囊和气源直接流体连通。
根据本发明,已发现有在牵引事件期间将负载重量快速转移到驱动桥的能力,同时非常期望使两个桥保持相同的装载高度。
附图说明
当参照附图考虑时,本发明的上述以及其它优点对于本领域技术人员来说说变得显而易见,其中:
图1为实施本发明的商用车辆的侧视图;
图2为实施本发明的商用车辆的详细侧视图;
图3A至图3E为根据本发明的特征结构的一个实施例的详细视图;
图4为根据本发明的重量转移悬架系统的实施例的示意图;
图5为示出在根据本发明的不同负载条件下气囊压力和桥负载的示例性数据的图表;
图6为示出对于根据本发明的操作条件的螺线管位置的图表;
图7为示出对于根据本发明的负载测试条件的示例性数据结果的图表;
图8为示出根据本发明实施例的用以使驱动桥气囊充气的桥到桥负载转移的示例性数据的图形;
图9为示出根据本发明实施例的用以使支持桥气囊放气的桥到桥负载转移的示例性数据的图形;
图10为示出根据本发明实施例的用以使驱动桥气囊充气并且同时使支持桥气囊放气的桥到桥负载转移的示例性数据的图形;
图11为示出根据本发明实施例的桥到桥负载转移的示例性数据的图形。
具体实施方式
应理解,除非在明确说明相反的情况下,本发明可假定各种可选择的方位和步骤顺序。也应理解,在附图中示出且在以下说明书中描述的具体装置和处理仅是所附权利要求中限定的本发明概念中的示例性实施例。因此,除非权利要求另外明确说明,否则与所公开实施例相关的具体尺寸、方向或其它物理特性不应被解释为限制性的。
图1和图2描绘了用于6x2车辆的重量转移悬架系统,其具有单驱动桥12、单支持桥14、与每个桥相关联的气囊16、18、气源箱20以及控制气囊16、18和气源箱20之间的气体流动的机电控制单元(MCU)。
MCU 22可促进对系统压力的精确控制。如图3A至图3E所示,MCU包括电子控制部分28和气动控制部分30。电子控制部分28被配置成确定在驱动桥12和支持桥14上的气囊16、18压力,并且如果需要,电子控制部分28可控制对气囊16、18充气和/或放气。
对于MCU的各种输入可使用算法而合并以提高负载转移算法的功能。算法可基于车辆参数来控制气压的转移。一般概念试图预测何时需要增加的牵引力并且然后允许用于更大牵引的重量转移。估计的重量可导致算法限制或增加压力转移。
MCU 22包括壳体26。电子控制部分28和气动控制部分30设置在外壳26内。优选地,电子控制部分28设置在外壳26的上部分中,并且气动控制部分30设置在外壳26的下部分中。
电子控制部分28可包括在一组程序指令的控制下操作的微处理器,其也可称为软件。电子控制部分28可包括存储程控指令的存储器(未示出)。存储器也可存储识别码、气囊压力记录值和/或在一定时间段内的用户输入。
电子控制部分28可接收来自电源(未示出)和/或与电源相关联的一个或多个螺线管的输入信号。螺线管可为本领域传统的。电子控制部分28也可接收来自操作员控制装置(未示出)的输入信号。操作员控制装置可允许车辆的操作员对重量转移悬架系统10施加一定水平的控制。操作员控制装置可为本领域传统的。
电子控制部分28可将信号输出到气动控制部分30中的一个或多个端口和/或通道。优选地,电子控制部分28经由彼此相关联的螺线管将信号输出到多个端口和/或通道。如示意图4所示,存在具有其相应螺线管S1的供应端口32,该供应端口为系统提供加压空气。具有其相应螺线管S4的放气端口38将来自系统的加压空气移除并且将其排回到大气中。具有其相应螺线管S2的驱动桥端口34与驱动桥气囊16直接流体连通。具有其相应螺线管S5的支持桥端口40与支持桥气囊18直接流体连通。具有其相应螺线管S3的打开/关闭控制通道36在驱动桥气囊16与支持桥气囊18和供应端口32与放气端口38之间充当协调器。控制管线C促进打开/关闭控制通道36与端口32、34、38、40的连通。
输出信号可为电流。尽管在本发明中描述的是螺线管,但是其它类型能够接收电信号的装置也在本发明的范围内。电流可由螺线管接收以将相应的端口或通道置于打开位置或关闭位置中。类似地,电流可从螺线管中移除以将相应的端口或通道处于打开或关闭位置中。电子控制部分28也可将信号输出到显示装置(未示出)。显示装置可作为操作员控制装置或独立式装置的一部分而被包括。如图3A至图3E所示,气动控制部分30包括设置在外壳26内的一个或多个端口和/或通道和形成在外壳26中的一个或多个端口。
在图4中示意性所示,MCU 22包括四个端口32、34、38、40和打开/关闭控制通道36,但是应理解MCU 22可包括更多或更少的端口和/或通道。在MCU 22内的控制管线C与端口32、34、38、40中的每个和打开/关闭控制通道36都处于流体连通,并且如前所述,各自都包括用以隔离并打开或关闭相应端口或通道的分离螺线管(S1-S5)。控制管线C可将MCU 22分成两侧。第一侧包括供应端口32和驱动桥端口34。第二相对侧包括放气端口38和支持桥端口40。
控制螺线管S3与其它螺线管S1、S2、S4、S5中的每个和压力传感器Pn直接连通。压力传感器Pn为能够监测控制管线C内的流体压力的传感器。压力传感器Pn也可被配置成传送将关于控制管线C内的流体压力的信息传递给控制器(未示出)的信号。与先前讨论的布置一致,控制管线C与端口32、34、38、40中的每个和打开/或关闭控制通道36直接流体连通。
重量转移悬架系统10也包括加压空气源。加压空气从气源箱20被供应到供应端口32。气源箱20经由流体连通管线将加压空气源提供给MCU 22的供应端口32并且进入气囊16、18中。
MCU 22用于经由流体连通管线将空气调节到特定位置。如果对于应用是足够的,流体连通管线可以是任何直径。在本发明中,MCU 22的驱动桥端口34连接到驱动桥气囊16,并且MCU 22的支持桥端口40连接到支持桥气囊18。更具体地,驱动桥端口34和支持桥端口40通过打开/关闭控制通道36连接,以允许空气在驱动桥气囊16和支持桥气囊18之间传送。
MCU 22的放气端口38可用于将来自驱动桥气囊16和/或支持桥气囊18的空气排空到大气中。可选择性地排空气囊16、18中的一者或两者以使其返回到其原始压力,或者如果需要可紧急放气。
穿过供应端口32的空气与打开/关闭控制通道36和驱动桥端口34直接连通,并且穿过打开/关闭控制通道36的空气也与支持桥端口40和放气端口38直接连通。打开/关闭控制通道36连接在端口32、34、38、40之间以促进空气从气源箱20流向驱动桥气囊16和/或支持桥气囊18,或者气流也可是反向的以从气囊16、18中抽取气体,从而通过放气端口38将空气排空到大气中。
如在图中所示,驱动桥气囊16和支持桥气囊18是相同的,这意味着其具有相同的高度和直径。然而,对于具有不同尺寸的气囊也在本发明的范围内,这意味着驱动桥气囊可具有与支持桥气囊不同的直径和/或高度。不论在驱动桥12和支持桥14上使用何种尺寸气囊,重要的是控制并且维持可接受的卡车装载高度。
从桥的中心到车辆的框架横杆的底部来测量装载高度。装配有后部空气悬架的车辆具有在工厂预设的其装载高度和桥小齿轮角度。这些是精密设定并且不应被改变。不正确或不当调节的装载高度可产生不成熟的动力传动系磨损和动力传动系振动。例如,当由于牵引事件,诸如在雨天和/或其它类型的湿滑、泥泞或下雪情况下驱动桥12需要更大的地面负载时,需要快速且有效地传送加压空气以增加驱动桥气囊中的压力。在这样做时,重要的是车辆装载高度维持在期望距离处或接近期望距离。
在使用如图5所示的正常条件下的示例性数据的一个实例中,驱动桥气囊16和支持桥气囊18两者在相等桥负载条件下在标准装载高度下具有相同的内部气压。如所示,在每个桥上的气囊16、18承载4471.15lbs的负载。因此,在正常操作模式和相等负载下,每个气囊16、18中的气压基本上相等并且在两个桥中的装载高度将相同。轮胎牵引力分布在驱动桥12和支持桥14两者中相等。这些数值反应在正常操作模式下水平地面情况。在如图6所示的这一条件下,用于供应端口32和放气端口38的螺线管配置两者都是断开的并且驱动桥端口34、打开/关闭控制通道36以及支持桥端口40都接通。
如果感测到牵引事件,那么MCU 22可快速地将空气从气源箱20传送到驱动桥气囊16,同时如果需要将空气从支持桥气囊18中抽出。在牵引模式下,驱动桥气囊16中的气压通常增加而支持桥气囊18中的气压降低。如图5所示,在不相等负载下,驱动桥上的气囊将承载5750lbs的负载,并且支持桥上的气囊将承载3192.25lbs的负载。在近似相同的装载高度下,驱动桥气囊16中的增压与支持桥气囊18中的减压组合产生较高的驱动桥12地面负载和较低的支持桥14地面负载。在如图6所示的这一条件下,用于打开/关闭控制通道36的螺线管配置是断开的并且供应端口32、驱动桥端口34、放气端口38和支持桥端口40都接通。
在施加增加的牵引力并且降低或消除车轮滑动之后,MCU 22将返回到正常状态,并且在牵引事件之前将气囊16、18中的气压调节回到其相应的气压。
在返回到正常状态的情况下,通常一个气囊的压力增加而另一个气囊的压力降低。驱动桥气囊16中的气压降低可以这样来实现,即,可通过经由打开/关闭控制通道36传送空气并且传送到支持桥端口40,返回到支持桥气囊18中或经由打开/关闭控制通道36传送到放气端口38并且排放到大气中。
流体连通管线最常用于将MCU 22连接到气囊16、18。驱动桥气囊16和支持桥气囊18以及MCU 22通常靠得很近,因此通过流体连通管线传送空气可以是非常快速的。通常,在所有商用卡车上存在空气压缩机(未示出)以操作空气制动系统和空气悬挂系统。空气压缩机包括气箱,但是重量转移悬架系统具有靠近桥的其自身的贮存器,以使得可快速获得空气并且不需要从制动系统中强取。虽然对于向前移动需要牵引能力,但是对于改善制动和停止也需要牵引能力。
如前所述,在牵引事件期间快速传送转移负载重量的能力是重量转移悬架系统的一个期望特征。图7详述在负载重量从支持桥14转移到驱动桥12的两个不同测试的示例性数据。在第一测试中,1200lbs仅在2.4秒内被转移,而在第二测试中,3400lbs在6.5秒内被转移。图8至图11进一步示出负载转移测试的不同实例和相应结果的示例性数据。
图8中的图形示出桥到桥负载转移和使驱动桥气囊从12psi充气到24psi并且负载从3000lbs到约5500lbs所耗用的时间的示例性数据。同时,支持桥气囊的psi和lbs相对地保持相同,其中psi和lbs两者仅有微小降低。
图9中的图形示出桥到桥负载转移和使支持桥气囊从10psi放气到5psi并且负载从约2500lbs到1500lbs所耗用的时间的示例性数据。同时驱动桥气囊psi和lbs相对地保持相同,其中驱动lbs仅有微小增加。
图10中的图形示出桥到桥负载转移和使驱动桥气囊充气同时使支持桥气囊放气耗用的时间。驱动桥气囊从15psi增加到约25psi并且负载从约2500lbs仅增加到6000lbs。同时,支持桥气囊从10psi降低到5psi并且负载从3000lbs降低到约1000lbs。
图11中的图形示出桥到桥负载转移和使驱动桥气囊从15psi充气到约20psi并且负载从2800lbs到约4000lbs所耗用的时间。同时,支持桥气囊psi和lbs相对地保持相同,其中支持桥lbs仅有微小波动。
从前述详细描述中,将显而易见的是在不背离真实范围和精神的情况下,各种修改、添加和其它可替代实施例也是可能的。本文中讨论的实施例被选择且描述以提供对本发明和其实际应用的原则的最佳说明,从而使得本领域技术人员能够在各种实施例中使用具有适合于被预期的特定用途的各种修改的各种实施例。如将清楚的是,所有此类修改和变型都在本发明的范围内。

Claims (13)

1.一种动态重量转移悬架系统,其包括:
连接在串联桥的驱动桥和车架之间的第一气囊;
连接在所述串联桥的支持桥和所述车架之间的第二气囊;以及
机电控制单元(MCU),所述机电控制单元经由流体连通管线与所述第一气囊、所述第二气囊以及气源直接流体连通;
其中所述机电控制单元包括位于所述机电控制单元的气动控制部分内的四个端口和控制通道,所述端口包括供应端口、驱动桥端口、放气端口以及支持桥端口,所述控制通道连接在所述供应端口、所述驱动桥端口、所述放气端口以及所述支持桥端口之间;
其中所述端口和所述控制通道中的每个都包括相应的螺线管,所述螺线管接收信号以打开或关闭所述相应的端口或所述控制通道;以及
其中在牵引操作模式下,用于所述控制通道的所述螺线管配置断开,并且用于所述供应端口、所述驱动桥端口、所述放气端口以及所述支持桥端口的所述螺线管配置都接通。
2.根据权利要求1所述的动态重量转移悬架系统,其中所述第一气囊和所述第二气囊的尺寸相同。
3.根据权利要求1所述的动态重量转移悬架系统,其中所述机电控制单元包括控制管线,所述控制管线与所述至少一个端口处于流体连通,所述控制管线将所述机电控制单元分成两侧。
4.根据权利要求3所述的动态重量转移悬架系统,其中所述机电控制单元的第一侧包括供应端口和驱动桥端口,并且其中所述机电控制单元的第二侧包括放气端口和支持桥端口。
5.根据权利要求1所述的动态重量转移悬架系统,其中在相等负载情况下,所述第一气囊中的气压等于所述第二气囊中的气压,并且其中所述第一气囊的高度和所述第二气囊的高度相等。
6.根据权利要求5所述的动态重量转移悬架系统,其中在所述相等负载情况下,所述第一气囊上的所述负载磅数等于所述第二气囊上的所述负载磅数。
7.根据权利要求1所述的动态重量转移悬架系统,其中在不相等负载情况下,所述第一气囊中的气压大于所述第二气囊中的气压,并且其中所述第一气囊的高度和所述第二气囊的高度相等。
8.根据权利要求7所述的动态重量转移悬架系统,其中在所述不相等负载情况下,所述第一气囊上的所述负载磅数大于所述第二气囊上的所述负载磅数。
9.根据权利要求1所述的动态重量转移悬架系统,其中在正常操作模式下,用于所述供应端口和所述放气端口两者的所述螺线管配置都断开,并且用于所述驱动桥端口、所述控制通道以及所述支持桥端口的所述螺线管配置都接通。
10.根据权利要求1所述的动态重量转移悬架系统,其中所述供应端口与所述控制通道和所述驱动桥端口直接流体连通。
11.根据权利要求1所述的动态重量转移悬架系统,其中所述放气端口与所述控制通道和所述支持桥端口直接流体连通。
12.根据权利要求1所述的动态重量转移悬架系统,其中在牵引操作模式下,来自所述气源箱的加压空气被迫通过所述流体连通管线并且通过所述供应端口、通过所述驱动桥端口而进入所述第一气囊中。
13.根据权利要求1所述的动态重量转移悬架系统,其中在返回到正常操作模式之后,加压空气通过流体连通管线并且通过所述驱动桥端口、通过所述控制通道、通过所述放气端口从所述第一气囊中抽出,并且排放到大气中,同时,来自所述第一气囊的所述加压空气可经由流体连通管线并且通过所述驱动桥端口、所述控制通道、所述支持桥端口传送并且进入所述第二气囊中。
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