Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
VEHICLE PROPELLING DEVICE AND HYDRAULIC TRANSMISSION DEVICE
Document Type and Number:
Japanese Patent JP2000158977
Kind Code:
A
Abstract:

To provide a vehicle propelling device and a hydraulic transmission device having a controller for adjusting a pressure to compensate an actual fluctuation of hydraulic leak rate.

This vehicle propelling device includes a wheel motor and a hydraulic transmission device having a variable displacement type pump changing according to a pump flow amount command signal, decides an estimation motor flow rate, and outputs a signal 69 corresponding to the estimation motor flow rate. A pressure command signal 77 corresponds to a required pump pressure. A controller calculates a pump flow rate, compares an actually detected motor flow rate 75 with the pump flow rate, and decides a device leak rate 107. The controller adjusts the estimation motor flow rate signal 69 to compensate the leak rate 107 and generates an appropriate pump flow amount command signal.


Inventors:
HASTREITER JAMES JOSEPH
Application Number:
JP1999000322464
Publication Date:
June 13, 2000
Filing Date:
November 12, 1999
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
EATON CORP
International Classes:
B60W10/04; B60K17/10; B60W10/08; B60W10/10; B60W10/12; E02F9/20; E02F9/22; F02D29/04; F15B21/08; F16H39/02; F16H61/40; F16H61/4035; F16H61/4192; F16H61/42; F16H59/26; (IPC1-7): B60K41/12; B60K17/10; F02D29/04; F16H61/40
Attorney, Agent or Firm:
萼 経夫 (外3名)