-
公开(公告)号:WO1992001162A1
公开(公告)日:1992-01-23
申请号:PCT/US1990004893
申请日:1990-08-30
Applicant: CATERPILLAR INC.
Inventor: CATERPILLAR INC. , BIANCHETTA, Donald, L. , ST. GERMAIN, Gene, R.
IPC: F15B11/05
CPC classification number: F15B11/168 , E02F9/2225 , F15B11/165 , F15B2211/20553 , F15B2211/30505 , F15B2211/30555 , F15B2211/3105 , F15B2211/3144 , F15B2211/31576 , F15B2211/324 , F15B2211/351 , F15B2211/50536 , F15B2211/55 , F15B2211/6054 , F15B2211/6055 , F15B2211/6058 , F15B2211/7053 , F15B2211/7058 , F15B2211/71
Abstract: Load sensing hydraulic systems are useful for distributing fluid from a variable displacement pump to the individual work circuits in accordance with the demand of each work circuit. Preventing load pressure from being drained from the motors of the work circuits during some operating functions heretofore required the use of a pair of pressure compensating valves and a pair of shuttle valves at each of the directional control valves. The subject load pressure duplicating circuit (49) includes a single load pressure duplicating valve (52) having an end (62) subjected to the load pressure in a signal network (51) and reduces pump pressure entering the valve to a pressure level at the output thereof equal to the load pressure. This duplicated pressure is then utilized as the control fluid for the pressure compensating valves and a displacement controller (19) of the pump. The system is greatly simplified by the use of only a single duplicating valve for a hydraulic system having a plurality of work circuits.
-
公开(公告)号:WO1988000548A1
公开(公告)日:1988-01-28
申请号:PCT/US1986001962
申请日:1986-09-22
Applicant: CATERPILLAR INC.
Inventor: CATERPILLAR INC. , BERNHAGEN, James, R. , CRABB, Elmer, R. , MURPHY, Marilyn, S. , ROLEY, Daniel, G. , ST. GERMAIN, Gene, R. , TUNNELL, James, H.
IPC: B62D11/10
CPC classification number: B62D11/183
Abstract: A mechanical-over-hydraulic steering apparatus (49) capable of providing automotive-type steering includes a steering wheel driven input control member (130), right and left turn control valves (224, 276), and first and second actuators (158, 160) mounted for rotation along an axis (132) common with the input control member. Each of the actuators has a cam (178, 242) operatively associated with a cam-following roller assembly (202, 266) that operates the respective control valve. The vehicle (10) has a cross drive mechanism (22), and the steering apparatus includes an over-center variable displacement steering pump (86) and associated displacement control (91) controllably operated by first and second pilot lines (112, 114) connected to the right and left turn control valves. The steering pump controllably and bidirectionally communicates fluid to a steering motor (82) for the steering input to the cross drive mechanism.
Abstract translation: 能够提供汽车转向的机械式液压转向装置(49)包括方向盘驱动的输入控制部件(130),左右转向控制阀(224,276),以及第一和第二致动器(158, 160),其安装成沿着与输入控制构件共用的轴线(132)旋转。 每个致动器具有与相应的控制阀操作的凸轮跟随辊组件(202,266)可操作地相关联的凸轮(178,242)。 车辆(10)具有十字驱动机构(22),并且转向装置包括由第一和第二先导线(112,114)可控地操作的过中心可变排量转向泵(86)和相关联的位移控制(91) 连接到右转和左转控制阀。 转向泵可控地和双向地将流体连接到用于转向输入到十字驱动机构的转向马达(82)。
-
公开(公告)号:WO2006118841A1
公开(公告)日:2006-11-09
申请号:PCT/US2006/015360
申请日:2006-04-25
Applicant: CATERPILLAR INC. , SHIN CATERPILLAR MITSUBISHI LTD. , MA, Pengfei , ST. GERMAIN, Gene, R. , ZHANG, Jiao , EGELJA, Aleksandar, M. , LEHMANN, Robert, S. , SOROKINE, Michael, A.
Inventor: MA, Pengfei , ST. GERMAIN, Gene, R. , ZHANG, Jiao , EGELJA, Aleksandar, M. , LEHMANN, Robert, S. , SOROKINE, Michael, A.
IPC: F15B11/00 , F15B11/05 , F15B11/042
CPC classification number: F15B11/042 , F15B11/006 , F15B11/05 , F15B2211/20546 , F15B2211/3052 , F15B2211/30535 , F15B2211/30575 , F15B2211/3111 , F15B2211/3144 , F15B2211/31576 , F15B2211/327 , F15B2211/35 , F15B2211/50572 , F15B2211/5059 , F15B2211/513 , F15B2211/5151 , F15B2211/528 , F15B2211/8613
Abstract: A hydraulic system (22) having a source (24) of pressurized fluid, a fluid actuator (16) with a first chamber (50) and a second chamber (52), and a body (90). The body has a first valve (26) configured to selectively fluidly communicate the source with the first chamber and a second valve (30) configured to selectively fluidly communicate the source with the second chamber. The body also has a proportional pressure compensating valve (36) to control a pressure of fluid directed between the source and the first and second valves and a supply passageway (61) disposed between the source and the first and second valves in parallel and the proportional pressure compensating valve is disposed within the supply passageway.
Abstract translation: 具有加压流体源(24)的液压系统(22),具有第一室(50)和第二室(52)的流体致动器(16)和主体(90)。 主体具有构造成选择性地将源与第一室流体连通的第一阀(26)和构造成选择性地将源与第二室流体连通的第二阀(30)。 主体还具有比例压力补偿阀(36),用于控制在源和第一和第二阀之间引导的流体的压力;以及供应通道(61),其平行设置在源与第一和第二阀之间, 压力补偿阀设置在供给通道内。
-
公开(公告)号:WO1990013466A1
公开(公告)日:1990-11-15
申请号:PCT/US1989003430
申请日:1989-08-11
Applicant: CATERPILLAR INC.
Inventor: CATERPILLAR INC. , ST. GERMAIN, Gene, R. , WAGGONER, John, B.
IPC: B62D05/08
CPC classification number: B62D5/09 , Y10T137/2554 , Y10T137/87169
Abstract: Pilot operated steering system with load-responsive flow amplified control system includes a directional control valve (19) movable to an operating position to direct fluid from an operating fluid circuit (16) through a variable orifice (75) to a steering motor (11) and to direct control fluid from a control circuit (17) through another variable orifice (74) to combine with steering motor fluid. Control fluid moves directional control valve (19) to an operating position. Pressure compensation creates a predetermined pressure differential across variable orifice (74). The steering control valve (24) controls the position of the directional control valve (19). Pump displacement (14) responds to pressure in control circuit (17) to establish a constant pressure differential between pump (14) and steering motor (11) load pressure. Relative size of the variable orifices determines the flow amplification ratio between the pilot control circuit and the power operating circuit.
Abstract translation: 具有负载响应流量放大控制系统的先导操作转向系统包括可移动到操作位置以将流体从工作流体回路(16)引导通过可变孔(75)到转向马达(11)的方向控制阀(19) 并且将来自控制回路(17)的控制流体引导到另一个可变孔口(74)以与转向马达流体结合。 控制流体将方向控制阀(19)移动到操作位置。 压力补偿在可变孔口(74)之间产生预定的压力差。 转向控制阀(24)控制方向控制阀(19)的位置。 泵排量(14)响应于控制回路(17)中的压力,以建立泵(14)和转向马达(11)负载压力之间的恒定压差。 可变孔的相对尺寸决定了先导控制电路和电源工作电路之间的流量放大率。
-
公开(公告)号:WO1992004544A1
公开(公告)日:1992-03-19
申请号:PCT/US1990005847
申请日:1990-10-15
Applicant: CATERPILLAR INC.
Inventor: CATERPILLAR INC. , ST. GERMAIN, Gene, R.
IPC: F15B11/05
CPC classification number: F15B11/163 , E02F9/2225 , E02F9/2296 , F15B13/0417 , F15B2211/20553 , F15B2211/30555 , F15B2211/3111 , F15B2211/351 , F15B2211/6054 , F15B2211/6055 , F15B2211/71 , Y10T137/87169
Abstract: Pressure compensating valves located downstream of the directional control valves are useful in providing load independent, proportional flow control hydraulic systems and normally serve as load checks. The subject load check and pressure compensating valve (32, 33) is designed for use in a hydraulic system in which the pressure of a common pressure signal directed to all the pressure compensating valves of the system is limited to a predetermined maximum level. The pressure compensating valve includes a valve element (56, 57) disposed downstream of a metering orifice (54, 55), a separate load piston (74, 75) disposed in end-to-end relationship with the valve element in a common bore (46, 47) and a pressure compensating spring (84, 85) disposed in a chamber (82, 83) behind the load piston and biasing the load piston and valve element to the load check position. The common pressure signal is communicated to the chamber containing the spring while the actual load pressure of an associated hydraulic motor is directed to a chamber (78, 79) between the valve element and load piston so that the valve element is held in the load check position by the actual load pressure when the actual load pressure is greater than the pump discharge pressure.
-
公开(公告)号:EP0427791A1
公开(公告)日:1991-05-22
申请号:EP89910242.0
申请日:1989-08-11
Applicant: CATERPILLAR INC.
Inventor: ST. GERMAIN, Gene, R. , WAGGONER, John, B.
IPC: B62D5
CPC classification number: B62D5/09 , Y10T137/2554 , Y10T137/87169
Abstract: Un système de direction actionné par un circuit pilote doté d'un système de commande à amplification du débit en fonction de la charge comprend une vanne de commande directionnelle (19) mobile jusqu'à une position de marche, afin de diriger du fluide provenant d'un circuit de fluide de commande (16), par un orifice variable (75), jusqu'à un moteur de direction (11) et afin de diriger du fluide de commande à partir d'un circuit de commande (17) par un autre orifice variable (74), afin de le combiner avec le fluide du moteur de direction. Le fluide de commande déplace ladite vanne de commande directionnelle (19) jusqu'à une position de marche. Une compensation de pression crée un différentiel de pression prédéterminée dans ledit orifice variable (74). Ladite vanne de commande de direction (24) régule la position de ladite vanne de commande directionnelle (19). Le déplacement de la pompe (14) réagit à la pression exercée dans le circuit de commande (17), afin d'établir un différentiel de pression constant entre la pression de charge de la pompe (14) et du moteur de direction (11). La taille relative des orifices variables détermine le rapport d'amplification de débit entre le circuit de commande de pilotage et le circuit de commande de puissance.
Abstract translation: 由具有基于充量的速率放大控制系统的先导回路驱动的转向系统包括方向控制阀(19),该方向控制阀(19)可移动到驱动位置以将流体从 控制流体回路(16)通过可变节流孔(75)流向转向马达(11)并且用于将来自控制回路(17)的控制流体引导通过 另一可变节流孔(74)以便将其与转向马达的流体结合。 控制流体将所述方向控制阀(19)移动到运行位置。 压力补偿在所述可变节流孔(74)中产生预定的压力差。 所述转向控制阀(24)调节所述方向控制阀(19)的位置。 所述泵(14)的位移是响应于所述控制电路(17)中的压力以建立泵负荷压力(14)和转向马达之间的恒定压力差(11) 。 可变孔口的相对尺寸确定了导频控制电路和功率控制电路之间的放大率。
-
公开(公告)号:EP0319528A1
公开(公告)日:1989-06-14
申请号:EP86906124.0
申请日:1986-09-22
Applicant: CATERPILLAR INC.
Inventor: BERNHAGEN, James, R. , CRABB, Elmer, R. , MURPHY, Marilyn, S. , ROLEY, Daniel, G. , ST. GERMAIN, Gene, R. , TUNNELL, James, H.
IPC: B62D11
CPC classification number: B62D11/183
Abstract: Un appareil (49) de direction mécanique puis hydraulique de type automobile comprend un organe de commande (130) commandé par le volant, des soupapes de commande (224, 276) de virage à droite et de virage à gauche et un premier et un deuxième actionneurs (158, 160) rotatifs le long d'un axe (132) commun à l'organe de commande. Chaque actionneur comprend une came (178, 242) fonctionnellement associée à un ensemble (202, 266) de rouleau basculeur qui actionne la soupape de commande respective. Le véhicule (10) a un mécanisme transversal de direction (22) et l'appareil de direction comprend une pompe de direction (86) à centrage et déplacement variables et une commande de déplacement associée (91) actionnée de façon ajustable par une première et une deuxième lignes-pilotes (112, 114) reliées aux soupapes de commande de virage à droite et de virage à gauche. La pompe de conduite transmet de façon ajustable et bidirectionnelle du fluide à un moteur de direction (82) afin de fournir une entrée de commande au mécanisme transversal de direction.
-
公开(公告)号:EP0319528B1
公开(公告)日:1993-11-03
申请号:EP86906124.2
申请日:1986-09-22
Applicant: CATERPILLAR INC.
Inventor: BERNHAGEN, James, R. , CRABB, Elmer, R. , MURPHY, Marilyn, S. , ROLEY, Daniel, G. , ST. GERMAIN, Gene, R. , TUNNELL, James, H.
IPC: B62D11/10
CPC classification number: B62D11/183
Abstract: A mechanical-over-hydraulic steering apparatus (49) capable of providing automotive-type steering includes a steering wheel driven input control member (130), right and left turn control valves (224, 276), and first and second actuators (158, 160) mounted for rotation along an axis (132) common with the input control member. Each of the actuators has a cam (178, 242) operatively associated with a cam-following roller assembly (202, 266) that operates the respective control valve. The vehicle (10) has a cross drive mechanism (22), and the steering apparatus includes an over-center variable displacement steering pump (86) and associated displacement control (91) controllably operated by first and second pilot lines (112, 114) connected to the right and left turn control valves. The steering pump controllably and bidirectionally communicates fluid to a steering motor (82) for the steering input to the cross drive mechanism.
-
公开(公告)号:EP0489817B1
公开(公告)日:1995-07-26
申请号:EP90913302.7
申请日:1990-08-30
Applicant: CATERPILLAR INC.
Inventor: BIANCHETTA, Donald, L. , ST. GERMAIN, Gene, R.
IPC: F15B11/05
CPC classification number: F15B11/168 , E02F9/2225 , F15B11/165 , F15B2211/20553 , F15B2211/30505 , F15B2211/30555 , F15B2211/3105 , F15B2211/3144 , F15B2211/31576 , F15B2211/324 , F15B2211/351 , F15B2211/50536 , F15B2211/55 , F15B2211/6054 , F15B2211/6055 , F15B2211/6058 , F15B2211/7053 , F15B2211/7058 , F15B2211/71
Abstract: Load sensing hydraulic systems are useful for distributing fluid from a variable displacement pump to the individual work circuits in accordance with the demand of each work circuit. Preventing load pressure from being drained from the motors of the work circuits during some operating functions heretofore required the use of a pair of pressure compensating valves and a pair of shuttle valves at each of the directional control valves. The subject load pressure duplicating circuit (49) includes a single load pressure duplicating valve (52) having an end (62) subjected to the load pressure in a signal network (51) and reduces pump pressure entering the valve to a pressure level at the output thereof equal to the load pressure. This duplicated pressure is then utilized as the control fluid for the pressure compensating valves and a displacement controller (19) of the pump. The system is greatly simplified by the use of only a single duplicating valve for a hydraulic system having a plurality of work circuits.
-
公开(公告)号:EP0489817A1
公开(公告)日:1992-06-17
申请号:EP90913302.0
申请日:1990-08-30
Applicant: CATERPILLAR INC.
Inventor: BIANCHETTA, Donald, L. , ST. GERMAIN, Gene, R.
CPC classification number: F15B11/168 , E02F9/2225 , F15B11/165 , F15B2211/20553 , F15B2211/30505 , F15B2211/30555 , F15B2211/3105 , F15B2211/3144 , F15B2211/31576 , F15B2211/324 , F15B2211/351 , F15B2211/50536 , F15B2211/55 , F15B2211/6054 , F15B2211/6055 , F15B2211/6058 , F15B2211/7053 , F15B2211/7058 , F15B2211/71
Abstract: Les systèmes hydrauliques détecteurs de charge sont utiles pour répartir le fluide d'une pompe à cylindrée variable entre les différents circuits de travail conformément aux besoins de chaque circuit de travail. Jusqu'ici, pour empêcher la perte de pression de charge dans les moteurs des circuits de travail durant certaines fonctions d'exploitation, il fallait utiliser deux soupapes de compensation de pression et deux soupapes d'arrêt pour chacun des distributeurs. Le circuit de duplication de la pression de charge (49) de la présente invention comprend une seule soupape de duplication de pression de charge (52) possédant une extrémité (62) soumise à la pression de charge dans un réseau de signaux (51), et il réduit la pression de la pompe entrant dans la soupape à un niveau de pression à la sortie de ladite soupape correspondant à la pression de charge. Cette pression dupliquée est ensuite utilisée comme fluide de commande pour les soupapes de compensation de pression et comme dispositif de commande de cylindrée (19) de la pompe. Le système est considérablement simplifié par l'utilisation d'une seule soupape de duplication pour un système hydraulique comportant une pluralité de circuits de travail.
-
-
-
-
-
-
-
-
-