Title:
WORKING VEHICLE ENGINE CONTROL DEVICE AND ENGINE CONTROL METHOD
Document Type and Number:
WIPO Patent Application WO/2011/115290
Kind Code:
A1
Abstract:
The disclosed device is provided with: a torque limit mode switch (112); an accelerator pedal sensor (105) which detects the accelerator opening degree; and a transmission controller (106). When the torque limit mode switch (112) has designated an output torque limit, if the accelerator opening degree is less than a threshold value (Os), the transmission controller (106) limits the output torque of the engine in accordance with an equal horsepower characteristic curve (LN0) which constitutes the horsepower passing through the maximum output torque point (P1) during the idle revolution of the engine, and if the accelerator opening degree is not less than a threshold value (Os), the transmission controller (106) limits the output torque of the engine in accordance with an in-travel torque limit characteristic curve (LN1) wherein the limit torque gradually increases according to the increase of the accelerator opening degree, from an intersection point (P2) between the equal horsepower characteristic curve (LN0) and the absorption torque curve of a travel system, toward a matching point (M1) between a maximum torque line and the absorption torque curve of the travel system. Thus, the fuel consumption for a part of surface of a region (R1) is suppressed more than during engine control by the maximum torque line (Tmax), thus fuel consumption can be reduced.
More Like This:
Inventors:
IMAIZUMI MASAAKI (JP)
Application Number:
PCT/JP2011/056723
Publication Date:
September 22, 2011
Filing Date:
March 22, 2011
Export Citation:
Assignee:
KOMATSU MFG CO LTD (JP)
IMAIZUMI MASAAKI (JP)
IMAIZUMI MASAAKI (JP)
International Classes:
F02D29/00; E02F9/22; F02D29/04
Foreign References:
| JP2007255414A | 2007-10-04 | |||
| JP2008190506A | 2008-08-21 |
Attorney, Agent or Firm:
SAKAI, HIROAKI (JP)
Hiroaki Sakai (JP)
Hiroaki Sakai (JP)
Download PDF:
Claims: