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公开(公告)号：US20240360879A1
公开(公告)日：2024-10-31
申请号：US18643274
申请日：2024-04-23
申请人： Dana Belgium N.V.
IPC分类号： F16D48/02 , F16D25/0638
CPC分类号： F16D25/14 , F16D25/0638
摘要： Methods and systems are provided for a transmission clutch. In one example, the clutch has a pressure control system that includes a piston housing enclosing a piston cavity and a piston, as well as a diffusor positioned in the piston cavity. The diffusor may have tangential channels for directing flow of a fluid into the piston cavity.
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公开(公告)号：US20240352981A1
公开(公告)日：2024-10-24
申请号：US18681666
申请日：2022-07-13
发明人： Marco GRETHEL
IPC分类号： F16D48/02
CPC分类号： F16D48/0206 , F16D2048/0248 , F16D2048/0254 , F16D2048/0266 , F16D2048/029
摘要： The invention relates to a hydraulic assembly for driving a friction clutch, comprising a hydraulically driveable actuator cylinder, a pump driving the actuator cylinder, wherein the actuator cylinder has a working piston with a working chamber and the working piston moveably arranged in the working chamber divides said working chamber into a main chamber and an auxiliary chamber, at least one control valve which is designed as a multi-port valve and arranged in the line path between the actuator cylinder and the pump, wherein a first supply line leads from the pump to the control valve, whereby a line path is created via a second supply line in a first valve position of the control valve, which leads to the main chamber of the actuator cylinder. In addition, in a second valve position of the control valve, the auxiliary chamber of the working chamber can be fluidically connected to the line path of the first and second supply lines via a first discharge line, while simultaneously, in the second valve position, the main chamber is connected via the first and second supply lines by means of the pump.
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公开(公告)号：US20240280147A1
公开(公告)日：2024-08-22
申请号：US18293808
申请日：2022-07-13
发明人： Marco GRETHEL
IPC分类号： F16D48/02 , F16D25/0635 , F16D25/12
CPC分类号： F16D48/02 , F16D25/0635 , F16D25/123 , F16D2048/0221 , F16D2048/0227
摘要： An assembly for driving a friction clutch, having a hydraulically driveable stepped piston, with: a pump driving the stepped piston, which has a working piston moveably arranged in a working chamber that divides it into first and auxiliary working chambers. The working piston is mechanically connected to an auxiliary working piston and hydraulically driveable via a second working chamber. A control valve is arranged between the stepped piston and pump. A first line path leads from the pump to the second working chamber, and a second line path leads from the pump to the first working chamber. The stepped piston has a working tappet which acts on the friction clutch. The first and second line paths are connected via a first line section of the supply line and a multi-port control valve, which has two valve positions, and the first line section is at least partially blocked in one valve position.
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公开(公告)号：US20240110602A1
公开(公告)日：2024-04-04
申请号：US17955818
申请日：2022-09-29
CPC分类号： F16D48/02 , F15B15/20 , F16D25/04 , F16D2048/0257
摘要： A hydraulic circuit for a power transmission device has an oil passage supplying hydraulic pressure of hydraulic fluid to the power transmission device mounted on a vehicle and a hydraulic actuator on which the hydraulic pressure of the hydraulic fluid in the oil passage acts, the oil passage is provided with a concave portion of the inner surface of the oil passage that is recessed upward in the state of mounting on the vehicle. The concave portion is located upstream of the hydraulic actuating portion in the oil passage and above the hydraulic actuating portion when the unit is mounted in the vehicle.
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公开(公告)号：US11833883B1
公开(公告)日：2023-12-05
申请号：US18337431
申请日：2023-06-20
CPC分类号： B60H1/00828 , F01P7/081 , F16D48/02 , F01P7/088
摘要： A cooling fan device includes an electronic control unit that controls an engagement rate of a fan clutch. The electronic control unit executes a first calculation process that calculates an air conditioner requested engagement rate, a second calculation process that calculates, as a first guard value, a value of an engagement rate at which a fan rotation speed increases at a specified speed and an upper limit guarding process that sets a value of the air conditioner requested engagement rate to the first guard value when a calculated value of the air conditioner requested engagement rate in the first calculation process exceeds the first guard value. The electronic control unit further controls the engagement rate of the fan clutch based on a value of the air conditioner requested engagement rate after execution of the upper limit guarding process.
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公开(公告)号：US20230086720A1
公开(公告)日：2023-03-23
申请号：US18057701
申请日：2022-11-21
发明人： Stefano FASANO , Daniele DODI
IPC分类号： F16D48/02
摘要： The present disclosure describes a hydraulic control system comprising a first pressure chamber and a second pressure chamber, each pressure chamber configured to receive a hydraulic fluid, a first movable member configured to assume a position depending on a hydraulic pressure of the hydraulic fluid in the first pressure chamber and a second movable member configured to assume a position depending on a hydraulic pressure of the hydraulic fluid in the second pressure chamber, a hydraulic command circuit configured to provide the hydraulic fluid and to control the hydraulic pressure of the hydraulic fluid in the first pressure chamber and/or the second pressure chamber, having a switchable valve in fluid communication with the first pressure chamber, wherein the switchable valve is configured to be pilotable depending on the hydraulic pressure of the hydraulic fluid in the second pressure chamber.
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公开(公告)号：US20230047752A1
公开(公告)日：2023-02-16
申请号：US17793689
申请日：2021-02-18
发明人： Casper Herman JANS
摘要： Method for determining a kisspoint of a clutch. A method is provided of determining a kisspoint of a clutch in a driveline of a vehicle comprising a. increasing a target clutch pressure of a clutch piston up to a first predetermined test target pressure, b. increasing the target clutch pressure up to an upper target pressure and subsequently keeping the target clutch pressure stable for a predetermined time interval, c. monitoring a parameter indicative for the filling of the clutch piston, e.g. the rotational speed of a pump, during the predetermined time interval, d. repeating steps a., b., and c. for at least one further predetermined test target pressure, and e. determining the kisspoint based on the monitored parameter indicative for the filling of the clutch piston.
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公开(公告)号：US20230022875A1
公开(公告)日：2023-01-26
申请号：US17692003
申请日：2022-03-10
发明人： Ki Hyung JOO , Young Ho KO
IPC分类号： F16D48/02 , F16D48/06 , F16H61/00 , F16H61/688 , F16H61/30
摘要： A line pressure control method for a double clutch transmission (DCT) includes estimating a line pressure, which decreases with stoppage of an electric oil pump, based on a linear regression model using state variables of the DCT that are related to a line pressure change, and driving the electric oil pump when the line pressure estimated based on the linear regression model reaches a predetermined lower limit.
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公开(公告)号：US11543006B2
公开(公告)日：2023-01-03
申请号：US16906464
申请日：2020-06-19
IPC分类号： F16H9/18 , F16H55/56 , F16D25/0638 , F16D48/02
摘要： A driven sheave and variable torque limiting clutch assembly for a CVT that includes a drive sheave, a driven sheave, a VTL clutch and a hydraulic system is provided. The driven sheave is operationally coupled to a drive sheave via belt of the CVT. The driven sheave includes a fixed sheave member and a movable sheave member. The driven sheave is operationally coupled to a drivetrain. The VTL clutch is coupled between the driven sheave and the drivetrain to selectively couple torque between the driven sheave and the drivetrain. The hydraulic system is configured to manipulate both the movable sheave member of the driven sheave and the VTL clutch with shared hydraulic pressure.
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公开(公告)号：US11536327B2
公开(公告)日：2022-12-27
申请号：US17364709
申请日：2021-06-30
发明人： Stefano Fasano , Daniele Dodi
IPC分类号： F16D48/02
摘要： The present disclosure describes a hydraulic control system comprising a first pressure chamber and a second pressure chamber, each pressure chamber configured to receive a hydraulic fluid, a first movable member configured to assume a position depending on a hydraulic pressure of the hydraulic fluid in the first pressure chamber and a second movable member configured to assume a position depending on a hydraulic pressure of the hydraulic fluid in the second pressure chamber, a hydraulic command circuit configured to provide the hydraulic fluid and to control the hydraulic pressure of the hydraulic fluid in the first pressure chamber and/or the second pressure chamber, having a switchable valve in fluid communication with the first pressure chamber, wherein the switchable valve is configured to be pilotable depending on the hydraulic pressure of the hydraulic fluid in the second pressure chamber.
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