Cooling system and control method of cooling system
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsYoshiaki Kikuchi, Yasumitsu Omi, Shinji Wakao, Takenori Tsuchiya, Mikio Katashima, Kazuhiko Nakashima, Tetsuya Ishihara
Life of this patent
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Abstract
A cooling system constructed to cool down an accumulator mounted on a motor vehicle is herein presented. The cooling system sequentially controls an air blower to restrict the air blow to the accumulator, controls the air blow mode switchover module to switch over the active air blow mode after restriction of the air blow to the accumulator, and controls the air blower to release the restriction of the air blow to the accumulator after the switchover of the active air blow mode by the air blow mode switchover module.
Claims8
A cooling system for cooling down an accumulator mounted on a motor vehicle, the cooling system comprising:
- an air blower configured to have multiple air blow modes of taking in an intake air from different air flow paths within the cooling system and blowing the intake air to the accumulator;
- an air blow mode switchover module configured to changeover a status of each air flow path within the cooling system between an open position and a closed position in each of the multiple air blow modes to thereby switch over to an active air blow mode from among the multiple air blow modes;
- a noise level detection-estimation module configured to detect or estimate a noise level in a passenger compartment of the motor vehicle;
- and
- a controller configured, in response to a switch over demand of the active air blow mode during air blow to the accumulator, to perform an air blow restriction changeover control in a case that the detected or estimated noise level is less than a preset reference level, while controlling the air blow mode switchover module to switch over to the active air blow mode without restriction of the air blow to the accumulator in a case that the detected or estimated noise level is not less than the preset reference level, wherein
- the air blow restriction changeover control sequentially controls:
- i) the air blower to restrict the air blow to the accumulator, ii) the air blow mode switchover module to switch over to the active air blow mode after restriction of the air blow to the accumulator, and iii) the air blower to release the restriction of the air blow to the accumulator after the switch over to the active air blow mode by the air blow mode switchover module, and
- when a detected speed of the motor vehicle is not lower than a reference speed, a position of a damper is immediately changed over, and
- when a detected speed of the motor vehicle is lower than the reference speed, the air blower speed is restricted to a preset level, prior to changing over the position of the damper.
A method for controlling a cooling system, the cooling system including an air blower provided to have multiple air blow modes of taking in an intake air from different air flow paths within the cooling system and blowing the intake air to an accumulator mounted on a motor vehicle;
- and an air blow mode switchover module configured to changeover a status of each air flow path within the cooling system between an open position and a closed position in each of the multiple air blow modes to thereby switch over to an active air blow mode from among the multiple air blow modes, the method comprising:
- in response to a switch over demand of the active air blow mode during air blow to the accumulator, the method performs an air blow restriction changeover control in a case that a noise level in a passenger compartment of the motor vehicle is less than a preset reference level, while controlling the air blow mode switchover module to switch over to the active air blow mode without restriction of the air blow to the accumulator in a case that the noise level in the passenger compartment is not less than the preset reference level, wherein
- the air blow restriction changeover control sequentially controls:
- i) the air blower to restrict the air blow to the accumulator, ii) the air blow mode switchover module to switch over to the active air blow mode after restriction of the air blow to the accumulator, and iii) the air blower to release the restriction of the air blow to the accumulator after the switch over of the active air blow mode by the air blow mode switchover module,
- when a detected speed of the motor vehicle is not lower than a reference speed, a position of a damper is immediately changed over, and
- when a detected speed of the motor vehicle is lower than the reference speed, the air blower speed is restricted to a preset level, prior to changing over the position of the damper.
Dependencies are inferred from the claim text.