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公开(公告)号：US20210078579A1
公开(公告)日：2021-03-18
申请号：US16630777
申请日：2018-07-12
发明人： Gianpiero Negri , Antonio Oddo , Alessandro Benevelli , Adriano Garramone , Mario Girardi , Giovanni Notarnicola , Andrea Gravili
IPC分类号： B60W30/18 , E02F9/22 , B60W10/184 , B60W10/103 , B60T7/04 , F16H61/46
摘要： An inching system for a vehicle having a hydrostatic transmission and an engine that drives the transmission. The transmission has a pilot pressure port with a pressure of hydraulic fluid at the pilot pressure port controlling a level of power from the transmission, a beginning of draining of the hydraulic fluid from the pilot pressure port defining an inching starting point. The system includes a brake pedal and an electrohydraulic valve coupled to the pilot pressure port of the transmission, the valve being configured to drain the hydraulic fluid at the pilot pressure port. A sensor is coupled to the pedal to detect an input from the operator, the sensor producing a signal indicative of the input from the operator. A controller receives the signal and a speed of the engine. The controller controls the electrohydraulic valve dependent upon the signal and the engine speed so that the inching starting point is unchanged regardless of the speed of the engine.
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公开(公告)号：US11685374B2
公开(公告)日：2023-06-27
申请号：US16630777
申请日：2018-07-12
发明人： Gianpiero Negri , Antonio Oddo , Alessandro Benevelli , Adriano Garramone , Mario Girardi , Giovanni Notarnicola , Andrea Gravili
IPC分类号： B60W10/103 , B60W30/18 , B60W10/184
CPC分类号： B60W30/18063 , B60W10/103 , B60W10/184 , B60W2300/17 , B60W2510/0638 , B60W2510/18 , B60W2540/12 , B60W2710/1083 , B60W2710/18 , B60Y2200/415 , B60Y2300/18058 , F16H2312/06
摘要： An inching system for a vehicle having a hydrostatic transmission and an engine that drives the transmission. The transmission has a pilot pressure port with a pressure of hydraulic fluid at the pilot pressure port controlling a level of power from the transmission, a beginning of draining of the hydraulic fluid from the pilot pressure port defining an inching starting point. The system includes a brake pedal and an electrohydraulic valve coupled to the pilot pressure port of the transmission, the valve being configured to drain the hydraulic fluid at the pilot pressure port. A sensor is coupled to the pedal to detect an input from the operator, the sensor producing a signal indicative of the input from the operator. A controller receives the signal and a speed of the engine. The controller controls the electrohydraulic valve dependent upon the signal and the engine speed so that the inching starting point is unchanged regardless of the speed of the engine.
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公开(公告)号：US10280595B2
公开(公告)日：2019-05-07
申请号：US15123534
申请日：2015-03-02
发明人： Paolo Ferracin , Adriano Garramone , Andrea Gravili , Giuseppina Razetto , Gianpiero Negri , Michael Read , Marco Pietro Ciarrocchi
IPC分类号： E02F9/22 , F16H61/433 , E02F3/34 , E02F9/20 , F15B11/08
摘要： A compact wheel loader having a hydrostatic transmission and two modes of operation. In a normal mode, a demand lever is used to set the engine speed, and displacement of the swash plate of the hydraulic pump of the transmission is set by a hydraulic pilot pressure (Ps) that increases with engine speed, so that the transmission ratio automatically decreases as the engine speed increased. In a creeper mode, the engine is set to operate at a high speed to meet the demand of powered implements of the loader, and the wheel speed is controlled by the demand lever setting the transmission ratio by varying the hydraulic pilot pressure (Ps).
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公开(公告)号：US10214875B2
公开(公告)日：2019-02-26
申请号：US15123538
申请日：2015-03-02
发明人： Adriano Garramone , Andrea Gravili , Gianpiero Negri , Giuseppina Razetto , Marco Pietro Ciarrocchi
IPC分类号： E02F3/43 , E02F9/20 , E02F9/22 , E02F3/28 , F15B13/042
摘要： A working machine including a movable implement, a hydraulic actuator for displacing the implement, and a hydraulic control system for enabling an operator to control movement of the implement. The control system allows the implement to be returned to a desired position or state, such as a return to dig position or a return to float state, in a single automated operation that is initiated by the operator actuating a switch at the same time as moving a joystick in a desired direction. A pilot-operated valve is used to supply hydraulic fluid under pressure to the actuator acting on the implement and the operation of the joystick is detected by means of a pressure sensor connected to a control line of the pilot-operated valve.
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公开(公告)号：US20170081826A1
公开(公告)日：2017-03-23
申请号：US15123534
申请日：2015-03-02
发明人： Paolo Ferracin , Adriano Garramone , Andrea Gravili , Gianpiero Negri , Giuseppina Razetto , Michael Read , Marco Pietro Ciarrocchi
IPC分类号： E02F9/22 , F15B11/08 , F16H61/433 , E02F9/20 , E02F3/34
CPC分类号： E02F9/2253 , B60W2300/17 , E02F3/34 , E02F9/2058 , E02F9/2285 , E02F9/2292 , E02F9/2296 , F15B11/08 , F15B2211/20523 , F15B2211/20553 , F15B2211/575 , F16H61/433
摘要： A compact wheel loader having a hydrostatic transmission and two modes of operation. In a normal mode, a demand lever is used to set the engine speed, and displacement of the swash plate of the hydraulic pump of the transmission is set by a hydraulic pilot pressure (Ps) that increases with engine speed, so that the transmission ratio automatically decreases as the engine speed increased. In a creeper mode, the engine is set to operate at a high speed to meet the demand of powered implements of the loader, and the wheel speed is controlled by the demand lever setting the transmission ratio by varying the hydraulic pilot pressure (Ps).
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公开(公告)号：US20170073924A1
公开(公告)日：2017-03-16
申请号：US15123538
申请日：2015-03-02
发明人： Adriano Garramone , Andrea Gravili , Gianpiero Negri , Giuseppina Razetto , Marco Pietro Ciarrocchi
IPC分类号： E02F3/43 , F15B13/042 , E02F9/20 , E02F3/28 , E02F9/22
CPC分类号： E02F3/434 , E02F3/283 , E02F9/2004 , E02F9/2041 , E02F9/2203 , E02F9/2267 , E02F9/2285 , F15B13/0422 , F15B13/0424 , F15B2013/0428 , F15B2211/329 , F15B2211/355 , F15B2211/575 , F15B2211/6316 , F15B2211/6336 , F15B2211/6346 , F15B2211/6355 , F15B2211/67 , F15B2211/857
摘要： A working machine including a movable implement, a hydraulic actuator for displacing the implement, and a hydraulic control system for enabling an operator to control movement of the implement. The control system allows the implement to be returned to a desired position or state, such as a return to dig position or a return to float state, in a single automated operation that is initiated by the operator actuating a switch at the same time as moving a joystick in a desired direction. A pilot-operated valve is used to supply hydraulic fluid under pressure to the actuator acting on the implement and the operation of the joystick is detected by means of a pressure sensor connected to a control line of the pilot-operated valve.
摘要翻译： 一种包括可移动工具的工作机，用于移动工具的液压致动器，以及用于使操作者能够控制工具的运动的液压控制系统。 控制系统允许工具在由操作员在移动的同时启动开关的一个自动操作中返回到期望的位置或状态，例如返回到挖掘位置或返回到浮动状态 操纵杆在所需的方向。 先导阀用于向作用在工具上的致动器提供压力下的液压流体，并且通过连接到先导式操作阀的控制线的压力传感器来检测操纵杆的操作。
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