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公开(公告)号：EP4417840A1
公开(公告)日：2024-08-21
申请号：EP24157452.4
申请日：2024-02-13
IPC分类号： F16H61/4157 , F16H61/421 , F16H61/431
CPC分类号： F16H61/4157 , F16H61/421 , F16H61/431 , F16H2059/36620130101 , F16H59/44 , F16H59/54
摘要： Method of controlling a braking action of a working or agricultural machine equipped with a hydraulic transmission and a hydraulic service brake, the hydraulic transmission (HY) comprising an electrically controllable and variable displacement hydraulic pump (HP) and a motor electrically controllable and variable displacement hydraulic system (HM), the hydraulic pump and the hydraulic motor being interconnected by means of a high pressure hydraulic line (F) and a low pressure hydraulic line (R), the method comprising an initial acquisition step ( Steps 1 and 2) of at least one vehicle parameter and then, in succession, a first phase of progressive reduction of a displacement (PD) of the hydraulic pump (HP), a second phase (Step 5) of progressive increase of a displacement ( MD) of the hydraulic motor (HM) and, optionally, a third phase for activation of the service brake.
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2.发明公开
公开(公告)号：EP4299953A1
公开(公告)日：2024-01-03
申请号：EP23181298.3
申请日：2023-06-23
IPC分类号： F16H61/421 , F16H61/438
摘要： A method of controlling a hydraulic transmission of a working or agricultural machinery, the transmission (HY) comprising an electrically controllable variable displacement (HP) hydraulic pump and an electrically controllable variable displacement (HM) hydraulic motor (HM), the method comprising (Step 1) detection of a command to reverse the direction of travel while the vehicle is in motion, (Step 2) acquisition of an initial vehicle speed, (Step 3) calculation of a first target displacement value of the hydraulic motor in operation of said initial speed, (Step 4) calculating a rate of variation of a control signal of the displacement of the hydraulic motor to bring the displacement of the hydraulic motor to the first target displacement value; (Step 5) generation of a control signal of the displacement of the hydraulic motor to reach said first target displacement value according to said rate of change, until the vehicle stops.
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3.发明公开
公开(公告)号：EP4375104A1
公开(公告)日：2024-05-29
申请号：EP23210665.8
申请日：2023-11-17
IPC分类号： B60K6/12 , B60K6/46 , B60K6/52 , F16H61/421 , F16H61/431 , F16H61/465 , F16H61/47 , B60W10/06 , B60W30/188 , B60W20/10 , B60W30/182 , B60W10/103 , B60K17/10 , F16H61/40 , B60W50/00
CPC分类号： F16H61/465 , B60W2720/1020130101 , F16H61/421 , B60W2540/1020130101 , F16H61/47 , F16H61/431 , B60W2710/064420130101 , B60W10/06 , B60W30/1882 , B60W20/10 , B60W30/182 , B60W10/103 , B60K17/10 , B60W2300/1520130101 , B60W2300/1720130101 , B60W2050/001120130101 , F16H2059/36620130101 , F16H59/18
摘要： A method of controlling a propulsion system of a utility or agricultural vehicle, wherein the propulsion system comprises a prime mover (E) and a hydraulic transmission (HY) including a variable displacement pump (HP) configured to be driven in rotation by the prime mover and a variable displacement hydraulic motor (HM), operatively connected to the pump by means of a forward hydraulic line (F) and a return one (R), the method providing for monitoring of the (Chk 1) lever inclination of accelerator that exceeds a limit position (AL) and of the (Chk 2) rotation speed of the prime mover is equal to or greater than said limit speed (SL), and when said conditions are simultaneously verified the method foresees (Tr1) switching of the system from a first (ST1) operating mode in which the accelerator controls the rotation speed of the prime mover to a second operating mode (ST2) in which the accelerator controls the hydraulic pump m while the motor is operated at a fixed speed.
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4.发明公开
公开(公告)号：EP4130494A1
公开(公告)日：2023-02-08
申请号：EP22185770.9
申请日：2022-07-19
IPC分类号： F15B21/08
摘要： An electro-hydraulic circuit includes a fixed displacement hydraulic pump (P) and an electric motor (M) arranged to drive the hydraulic pump in rotation, a hydraulic actuator (BOOM, BUCKET, AUX) arranged to move an member or work tool and be powered by the hydraulic circuit, a proportional directional solenoid valve (V1, V2, V3) with open center and comprising a rest condition wherein it isolates the hydraulic actuator by connecting the hydraulic pump with the recovery tank, and a processing unit (STK) configured to receive the electrical signals of an input device (joystick) and generate electrical control signals (Spool Command, Rev, Torque) for the valves (V1, V2, V3) and for the engine (M); and programmed to detect the torque of the motor (M) and, when the torque of the motor (M) exceeds a predefined limit value, it commands the execution of at least one power reduction operation by reducing the number of revolutions of the motor (M) and/or bringing the corresponding solenoid valve (V1, V2, V3) to the neutral position with open center.
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公开(公告)号：EP3964651A1
公开(公告)日：2022-03-09
申请号：EP21195004.3
申请日：2021-09-06
摘要： A steering control method for a work vehicle (100) comprising the steps of storing a smoothing trigger position (105), moving the front wheels (115), sensing at least the actual position (106) of the front wheels (115), and if the sensed actual position (106) corresponds to the defined smoothing trigger position (105), then the method comprises the step of decelerating the front wheels (115) with the purpose of smoothly stopping the steering the front wheels (115), and a steering control system (101) for a work vehicle (100) comprising a memory (110), for storing a smoothing trigger position (105) of the front wheels (115), sensor means (111), suitable to acquire information about the actual position (106) of the front wheels (115), a data processing unit (112), suitable to process the information about the actual position (106) acquired by the sensor means (111) to compare it with the stored smoothing trigger position (105), the data processing unit (112) is suitable to control the actuating means (109) for moving the front wheels (115).
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6.发明公开
公开(公告)号：EP3891047A1
公开(公告)日：2021-10-13
申请号：EP19809869.1
申请日：2019-12-04
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公开(公告)号：EP4461621A1
公开(公告)日：2024-11-13
申请号：EP24172854.2
申请日：2024-04-26
摘要： Method of managing a hydraulic circuit of an electric work vehicle (EV), the hydraulic circuit (HC) comprising an electric hydraulic pump (EHP) configured to supply a hydraulic power steering (SV) and at least one hydraulic actuator (HA) of a work member (A, B) of the electric work vehicle, the method comprising a procedure for calculating a first speed value of the hydraulic pump as a function of an actuation speed of said steering wheel and at least a second rotation speed value of the hydraulic pump as a function of a deviation of said second interface means (J, R) with respect to a relative release position, and regulating the hydraulic pump speed according to the greater value between said first and at least second speed value.
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8.发明公开
公开(公告)号：EP4266856A1
公开(公告)日：2023-11-01
申请号：EP21740106.6
申请日：2021-07-15
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公开(公告)号：EP4339150A1
公开(公告)日：2024-03-20
申请号：EP23195521.2
申请日：2023-09-05
发明人： VENEZIA, Antonio , FORTUNATO, Adolfo , SANTARCANGELO, Gianni , ELEFANTE, Serena , ARESTA, Alessio
摘要： Work vehicle (1) comprising a body (2) movable on ground and provided with a boom (4) carried by a first hinge connection (5) with respect to body (2) and an attachment (6) carried by a second hinge connection (7) by boom (4), the boom (4) being actuated by a first hydraulic cylinder (8) to move about the first hinge connection (5) and the attachment (6) being actuated by a second hydraulic cylinder (9) to move about the second hinge connection (7), the work vehicle (1) comprising a control system (10) comprising sensor means (12, 13) configured to detect a movement of the boom (4) and the attachment (6) with respect to respectively body (2) and boom (4) and an electronic control unit (14) comprising elaboration means configured to retrieve data from sensor means (12, 13) and an input signal provided by the driver of vehicle, elaborate these latter and configured to provide a control signal to valve means (25) to control the operation of first and second hydraulic cylinders (8, 9) to allow a lifting and lowering of boom (4) while maintain the position of said attachment (6) fixed.
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公开(公告)号：EP4256140A1
公开(公告)日：2023-10-11
申请号：EP21836067.5
申请日：2021-12-07
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