초록 ▼

A drive system, comprising a driving motor whose speed can be adjusted by means of an operating member, an adjustable hydrostatic transmission with a pump and a hydraulic motor of which the volume throughput can be adjusted, followed by a change-speed gear, in particular one which can be shifted und

A drive system, comprising a driving motor whose speed can be adjusted by means of an operating member, an adjustable hydrostatic transmission with a pump and a hydraulic motor of which the volume throughput can be adjusted, followed by a change-speed gear, in particular one which can be shifted under load, connected to the hydrostatic transmission, wherein a control device is associated with the hydrostatic transmission, and an operating member is provided to initiate a gear shift, is arranged so that while ensuring a simple regulating concept, it exhibits subjectively good shifting behavior without costly auxiliary devices having to participate in the control response of the continuously adjustable hydrostatic transmission. This is achieved by the fact that associated with the control device is a device for determining the direction of transmission of power between the driving motor and the change-speed gear, and that after the initiation of a gear-change to a lower gear when the direction of transmission is from the change-speed gear to the driving motor, the control device adjusts the transmission ratio of the hydrostatic transmission towards a decrease in the driving speed of the hydraulic motor and that the shift can only take place at the earliest when the direction of transmission has come to be from the driving motor to the change-speed gear.

대표청구항 ▼

A drive system comprising a driving motor the speed of which can be varied by means of an operating member, an adjustable hydrostatic transmission comprising a pump and a hydraulic motor with a variable delivery and/or intake volume and a transmission ratio, a change-speed gear, especially one that

A drive system comprising a driving motor the speed of which can be varied by means of an operating member, an adjustable hydrostatic transmission comprising a pump and a hydraulic motor with a variable delivery and/or intake volume and a transmission ratio, a change-speed gear, especially one that can be shifted under load, following the hydrostatic transmission, a control means associated with the hydrostatic transmission, and an operating element for initiating a gear change, wherein said control means has associated with it means for determining a direction of power transmission between the driving motor and the change-speed gear, said control means comprising two control devices, the said first of which effects the gear change and the second sets throughputs of the pump and/or the hydraulic motor, said first control device being an electronic control device; whereby after initiation of a gear change into a lower gear when the direction of power transmission is from the change-speed gear to the driving motor said control means changes the transmission ratio of the hydrostatic transmission so as to reduce the output speed of the hydraulic motor; and whereby the shifting of the change-speed gear takes place no sooner than when the direction of transmission takes place from the driving motor to the change-speed gear.