Denso Corporation

Naoshi Sugesawa

Noboru Takagi

Takeshi Wakisaka

Tadashi Nakagawa

Kenji Miura

During the period of deceleration of a vehicle, an air conditioning control unit modifies a target cooling temperature (TEO) of an evaporator to a temperature lower than that before the deceleration by &#x3b3; &#xb0; C. in order to store cold in the evaporator (step S). When the vehicle comes to rest, the air conditioning control unit sets an upwardly-modified target temperature TEOK, which is a temperature modified toward more or less higher temperatures from the target cooling temperature TEO, and brings a compressor to rest and keeps the resting state of the compressor until a detected temperature TE of an evaporator discharge temperature sensor exceeds TEOK (step S). Therefore, it is possible to effectively utilize the cold heat stored in the evaporatorduring the period of deceleration of the vehicle with a good feeling of passengers being maintained while the vehicle is at rest.

Air conditioner for vehicle capable of recovering vehicle deceleration energy

In a vehicle air conditioner having a variable displacement compressor, a control unit calculates a target cooling temperature of air to be cooled by an evaporator, and controls a discharge capacity of the compressor such that a detected air temperature of the evaporator approaches the target cooling temperature. When a deceleration running state of the vehicle is detected, the control unit sets a corrected target cooling temperature lower than the target cooling temperature by a predetermined temperature, and controls the discharge capacity of the compressor such that the detected air temperature approaches the corrected target cooling temperature when the detected air temperature is lower than the corrected target cooling temperature, or controls the discharge capacity of the compressor approximately at the maximum capacity regardless of the corrected target cooling temperature when the detected air temperature is not lower than the corrected target cooling temperature.

Growing community of inventors

Kariya, Japan

Naoshi Sugesawa