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    • 5. 发明授权
    • Vehicle active tilt control system with pressure-controlled pump
    • 具有压力控制泵的车辆主动倾斜控制系统
    • US6003880A
    • 1999-12-21
    • US18158
    • 1998-02-03
    • Vladimir V. Kokotovic
    • Vladimir V. Kokotovic
    • B60G17/016B60G17/056B60G21/055B62D9/02B62D9/00
    • B62D9/02B60G17/0162B60G17/056B60G21/0553B60G2202/135B60G2202/413B60G2202/414B60G2202/415B60G2500/20B60G2800/012
    • A vehicle active tilt control system provides improved response time in torsionally adjusting front and rear stabilizer bars during vehicle maneuvers. The system includes front and rear actuators connected, respectively, to the front and rear stabilizer bars for selectively twisting the stabilizer bars. The actuators are moveable in first and second opposing directions for twisting the stabilizer bars in opposing directions. A directional control valve is operatively connected to the front and rear actuators for directing fluid flow to the actuators to selectively cause movement of the actuators in one of the first and second opposing directions. An electrically pressure-controlled pump is operatively connected to the directional control valve for delivering fluid to the directional control valve at controllable pressures, thereby providing improved pressure-control response time which results in improved system performance.
    • 车辆主动倾斜控制系统在车辆操纵期间提供改进的响应时间来扭转前后稳定杆。 该系统包括分别连接到前后稳定杆的前和后致动器,用于选择性地扭转稳定杆。 致动器可在第一和第二相对方向上移动,以在相反的方向上扭转稳定杆。 方向控制阀可操作地连接到前和后执行器,用于将流体流引导到致动器,以选择性地使致动器在第一和第二相反方向中的一个方向上移动。 电压力控制泵可操作地连接到方向控制阀,用于在可控压力下将流体输送到方向控制阀,从而提供改进的压力控制响应时间,其导致改进的系统性能。
    • 6. 发明授权
    • Method of improving response time in a vehicle active tilt control system
    • 改善车辆主动倾斜控制系统响应时间的方法
    • US5948028A
    • 1999-09-07
    • US18160
    • 1998-02-03
    • Joseph Michael RaadJohn Allen Oliver, Jr.Russell Lee NortonVladimir V. Kokotovic
    • Joseph Michael RaadJohn Allen Oliver, Jr.Russell Lee NortonVladimir V. Kokotovic
    • B60G17/016B60G17/056B60G21/055B60G21/10G06F17/00
    • B60G21/0555B60G17/0162B60G17/056B60G21/10B60G2202/135B60G2202/413B60G2202/414B60G2202/415B60G2204/1224B60G2204/81B60G2204/8304B60G2400/104B60G2400/51B60G2800/012
    • A method is provided for improving response time in a vehicle active tilt control system having front and rear stabilizer bars adjustable by front and rear hydraulic actuators which are movable in first and second opposing directions for adjusting vehicle body roll resistance provided by the stabilizer bars, and having a pressure control valve for controlling hydraulic pressure to the actuators. The method includes the following steps: a) operating only a single lateral accelerometer to determine the direction and magnitude of lateral acceleration during vehicle maneuvers; b) establishing the direction of movement of the front and rear hydraulic actuators in response to the determined direction of lateral acceleration; c) adjusting the pressure control valve in response to the determined magnitude of lateral acceleration; d) determining the rate of change of the magnitude of lateral acceleration as the magnitude of lateral acceleration decreases past a predetermined first threshold; and e) switching direction of movement of the front and rear hydraulic actuators in response to the determined rate of change of the magnitude of lateral acceleration, thereby anticipating directional changes in lateral acceleration to improve response time in adjusting vehicle body roll resistance during vehicle maneuvers.
    • 提供了一种用于改善车辆主动倾斜控制系统中的响应时间的方法,所述车辆主动倾斜控制系统具有可由前后液压致动器调节的前稳定杆和后稳定杆,所述前后液压致动器可在第一和第二相对方向上移动,用于调节由所述稳定杆提供的车体滚动阻力;以及 具有用于控制致动器的液压的压力控制阀。 该方法包括以下步骤:a)仅操作单个侧向加速度计,以确定车辆操纵期间横向加速度的方向和幅度; b)响应于确定的横向加速度的方向,建立前后液压致动器的运动方向; c)响应于确定的横向加速度的大小来调节压力控制阀; d)当横向加速度的幅度减小超过预定的第一阈值时,确定横向加速度的幅度的变化率; 以及e)响应于所确定的横向加速度的大小的变化率来切换前后液压致动器的运动方向,从而预期横向加速度的方向变化,以改善在车辆操纵期间调节车体滚动阻力的响应时间。
    • 9. 发明授权
    • Vehicle active tilt control system with improved actuators
    • 车辆主动倾斜控制系统具有改进的执行器
    • US6053510A
    • 2000-04-25
    • US18163
    • 1998-02-03
    • Vladimir V. Kokotovic
    • Vladimir V. Kokotovic
    • B60G17/016B60G17/056B60G21/055B62B5/02
    • B60G21/0555B60G17/0162B60G17/056
    • A vehicle active tilt control system torsionally adjusts front and rear stabilizer bars during vehicle maneuvers. A source of pressurized fluid is provided in communication with a directional control valve. Front and rear actuators each have opposing fluid chambers for receiving fluid from the directional control valve to cause actuator movement for adjusting the front and rear stabilizer bars. Each opposing fluid chamber of the rear actuator includes an inlet with a calibrated orifice therein for restricting flow therethrough to slow movement of the rear actuator for optimal timing of rear actuator movement with respect to front actuator movement. Preferably, the actuator includes a moveable piston with first and second plugs extending therefrom for cooperation within first and second outlets, respectively, in opposing fluid chambers of the actuator to at least partially restrict the fluid flow through the outlets as the pistons approach the fully stroked positions, thereby cushioning piston movement near the end stops.
    • 车辆主动倾斜控制系统在车辆操纵期间扭转前后稳定杆。 加压流体源与方向控制阀连通地设置。 前后执行器各自具有相对的流体室,用于从方向控制阀接收流体,以引起致动器运动以调节前后稳定杆。 后致动器的每个相对的流体室包括其中具有校准孔的入口,用于限制流过其中的流量,以使得后致动器的相对于前致动器运动的后执行器运动的最佳定时的缓慢运动。 优选地,致动器包括可移动活塞,其具有从其延伸的第一和第二塞子,用于分别在致动器的相对的流体腔室中的第一和第二出口内协作,以在活塞接近完全抚摸的状态时至少部分地限制流体通过出口的流体流动 从而缓冲靠近终点的活塞运动。