Title:
冷却ファンの駆動装置及びファン回転数制御方法
Document Type and Number:
Japanese Patent JP5202727
Kind Code:
B2
Abstract:
The invention provides a cooling fan driving device and the a fan rotational speed control method using the device capable of reducing uneconomical waste of flow volume of pressurized oil discharged from a hydraulic pump when the rotational speed of a cooling fan is increased to the target rotational speed. The target rotational speed of the cooling fan is set at a target rotational speed setting portion 22 of a controller 7 based on temperature of refrigerant and hydraulic oil and the rotational speed of an engine. An acceleration pattern for increasing the rotational speed of the cooling fan to the target rotational speed is set at an acceleration pattern setting portion 23 based on the rotational speed of the cooling fan, the target rotational speed set at the target rotational speed setting portion 22, and magnitude of force due to inertia of the cooling fan and the hydraulic motor which drives the cooling fan. The rotational speed command value calculation portion 24 performs control so that pressurized oil is supplied to the hydraulic motor at a flow rate required when the hydraulic motor is controlled to be accelerated based on the acceleration pattern. Thus, it is possible to reduce relief flow volume to be wasted without being consumed for the acceleration control of the hydraulic motor.
Inventors:
Masaaki Imaizumi
Minoru Wada
Minoru Wada
Application Number:
JP2011505961A
Publication Date:
June 05, 2013
Filing Date:
March 10, 2010
Export Citation:
Assignee:
KOMATSU LTD.
International Classes:
F01P7/04; F04D25/04; F15B11/00
Domestic Patent References:
| JP2004347040A | 2004-12-09 | |||
| JP2004225867A | 2004-08-12 | |||
| JP2004347040A | 2004-12-09 | |||
| JP2004225867A | 2004-08-12 |
Foreign References:
| WO2009001633A1 | 2008-12-31 | |||
| WO2009001633A1 | 2008-12-31 |
Attorney, Agent or Firm:
Takeo Noguchi