| US 7,373,239 B2 | ||
| Engine control device of work vehicle | ||
| Mitsuhiko Kamado, Hirakata (Japan); and Shigeru Yamamoto, Hirakata (Japan) | ||
| Assigned to Komatsu, Ltd., Tokyo (Japan) | ||
| Filed on Jul. 05, 2006, as Appl. No. 11/480,417. | ||
| Claims priority of application No. 2005-197937 (JP), filed on Jul. 06, 2005. | ||
| Prior Publication US 2007/0016355 A1, Jan. 18, 2007 | ||
| Int. Cl. G06G 7/70 (2006.01); G06F 19/00 (2006.01) | ||
| U.S. Cl. 701—103 [701/110] | 6 Claims |
| 1. An engine control apparatus for use in a work vehicle in which an engine torque is transmitted to a traveling body and/or
a work machine as well as to a cooling fan to perform traveling and/or work operation as well as to drive the cooling fan,
the engine control apparatus comprising:
work mode selection means for selecting a work mode according to a magnitude of traveling load and/or workload;
fan load detection means for detecting a magnitude of load on the cooling fan;
power curve setting means in which a plurality of power curves each representing a relationship between an engine speed and
the torque are set;
power curve selection means for selecting, when one of the work modes is selected by the work mode selection means, a power
curve from among the power curves selectable for the selected work mode in accordance with the magnitude of the load on the
cooling fan, so that input torque transmitted to the traveling body and/or the work machine does not surpass an upper limit
of the input torque transmitted to the traveling body and/or the work machine, the selectable power curves being predetermined
for each of the work modes and the upper limit of the input torque transmitted to the traveling body and/or the work machine
being predetermined; and
control means for controlling the engine so that the selected power curve is obtained.
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