Title:
車両推進装置及び油圧伝動装置
Document Type and Number:
Japanese Patent JP4178435
Kind Code:
B2
Abstract:
A vehicle propel system is disclosed, including a hydrostatic transmission having wheel motors (37L,37R) and a variable displacement pump (39), variable in response to a pump displacement command signal (51). The system involves determining (67) anticipated motor flow, and generating a signal (69) corresponding thereto. A pressure command signal (77) corresponds to the desired pump pressure. Actual motor flow is sensed (75), and a processor (49) calculates pump flow and compares it to actual motor flow (75) to determine system leakage (107). The processor then modifies the anticipated motor flow signal (69) to compensate for system leakage (107), and generates the appropriate pump displacement command signal (51). The use of feed-forward terms, such as anticipated motor flow (69), pump speed and commanded pressure times leakage gain to calculate desired pump displacement allow a lesser gain to be used for the feedback term (measured pump pressure 59), thereby reducing "wheel hop".
Inventors:
James joseph hustler
Application Number:
JP32246499A
Publication Date:
November 12, 2008
Filing Date:
November 12, 1999
Export Citation:
Assignee:
EATON CORPORATION
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
Domestic Patent References:
| JP61268526A | ||||
| JP1039503B2 | ||||
| JP10288256A | ||||
| JP7180176A |
Attorney, Agent or Firm:
Calyx
Miyazaki Yoshio
Kaoru Onozuka
Toshio Nakamura
Miyazaki Yoshio
Kaoru Onozuka
Toshio Nakamura