摘要:
A clutch control device for a four-wheel drive vehicle is provided, the device being able to suppress the elevation of the temperature of the oil supplied to a friction clutch during two-wheel drive travel when the friction clutch is released. The clutch control device is configured such that the device is mounted in a four-wheel drive vehicle provided with a dog clutch (8) and an electronic control coupling (16) housed in a coupling case (25); when a disconnected, two-wheel drive mode in which the dog clutch (8) and the electronic control coupling (16) are released is selected, a passage opening (25e) provided in the coupling case (25) is closed and lubrication oil (O) is retained in an oil chamber (25c) defined with respect to a clutch chamber (25b) that houses the electronic control coupling (16). When oil stirring conditions are met thereafter, the passage opening (25e) is opened and the lubrication oil (O) is allowed to flow into the clutch chamber (25b) from the oil chamber (25c).
摘要:
A clutch control device for a four-wheel drive vehicle is provided, the device being able to suppress the elevation of the temperature of the oil supplied to a friction clutch during two-wheel drive travel when the friction clutch is released. The clutch control device is configured such that the device is mounted in a four-wheel drive vehicle provided with a dog clutch (8) and an electronic control coupling (16) housed in a coupling case (25); when a disconnected, two-wheel drive mode in which the dog clutch (8) and the electronic control coupling (16) are released is selected, a passage opening (25e) provided in the coupling case (25) is closed and lubrication oil (O) is retained in an oil chamber (25c) defined with respect to a clutch chamber (25b) that houses the electronic control coupling (16). When oil stirring conditions are met thereafter, the passage opening (25e) is opened and the lubrication oil (O) is allowed to flow into the clutch chamber (25b) from the oil chamber (25c).
摘要:
Die Erfindung bezieht sich auf eine Rückkopplungsanordnung 10 für eine Kupplung 11, insb. für eine Ölbadscheibenkupplung, die insb. für eine Verwendung als Anfahrkupplung oder als Schaltkupplung vorgesehen ist, mit einer Sensoranordnung zur Erfassung der Kupplungstemperatur der Kupplung 11, die eine Temperaturerfassungseinrichtung 12 aufweist, mit wenigstens einem im wesentlichen die Ausgangstemperatur des aus der Kupplung 11 gelangenden Öles messenden, die aktuelle Oberflächentemperatur der Kupplung 11 ableitenden Temperatursensoren 13. Es ist dabei der wenigstens eine, im wesentlichen die Ausgangstemperatur des aus der Kupplung 11 gelangenden Öles messende, die aktuelle Oberflächentemperatur ableitende Temperatursensor 13 im direkten, unmittelbaren, außerhalb der Kupplung 11 liegenden Ausgangsbereich der Kupplung 11 angeordnet.
摘要:
The present invention provides an apparatus for estimating clutch temperature estimates clutch temperatures that closely follow actual clutch temperature without a temperature sensor and at low cost. The apparatus employs method for calculating energy applied to the driving clutch according to the detected rotational speed difference and estimated torque and method for estimating a clutch temperature variation based on the calculated energy and estimating a clutch temperature based on the estimated clutch temperature variation.
摘要:
A hydraulic coupling including a multi-plate clutch assembly operably connecting two relatively rotatable members and an actuator assembly for actuating the clutch assembly in response to speed differentiation between the two rotary members. The actuator assembly includes a hydraulic pump, a piston disposed in a piston chamber, and a fluid distribution system including a first flow path for supplying hydraulic fluid from a sump to the hydraulic pump and a second flow path for supplying hydraulic fluid from the hydraulic pump to the piston chamber. Hydraulic pressure in the piston chamber controls the magnitude of the clutch engagement force exerted by the piston on the clutch assembly. The fluid distribution system further includes a third flow path between the piston chamber and a clutch chamber. A control valve assembly is located in the third flow path and provides a flow control function for regulating the fluid pressure in the piston chamber and supplying fluid to the clutch chamber for cooling the clutch assembly. The control valve assembly also provides a pressure relief function for limiting the fluid pressure in the piston chamber to a predetermined maximum value, and a thermal unload feature for venting the piston chamber when the fluid temperature exceeds a predetermined maximum value.