Denso Corporation

Takuya Usami

Toshiki Sugiyama

Norihisa Sasano

Ikuo Ozawa

Satoshi Yoshimura

Kazuhiro Takeuchi

Noriaki Maeda

Junji Sugiura

Koji Nakamura

Takahiro Iwasaki

Yoshihiro Suguro

Isao Hara

Tomomi Baba

A blower fan includes a hub, a plurality of blades and a ring. The blades are arranged along and extend outwardly from an outer periphery of the hub. The ring is shaped in a circular ring form and couples a distal end portion of each blade. The distal end portion of each blade has a separation limiting structure that limits separation of a flow of air from the blade. Each blade has a shape that directs a flow direction of the air passing through the blade to the separation limiting structure of an adjacent blade which is an adjacent one of the plurality of blades located on a rear side of the blade in a fan rotational direction.

Blower fan

A cooling fan includes a cylindrical boss portion, a plurality of blades extending from the boss portion in a radial direction and a ring member integrated with radial outside edges of the blades. The ring member has an axial dimension smaller than an axial dimension of the blade at the radial outside edge, with respect to an axial direction of the boss portion. The ring member has an extending portion extending in a form of bell toward an upstream position of the blades with respect to an air flow. The extending portion is disposed such that a base point connecting to a body portion of the ring member is arranged in a range that begins at a point 25% and ends at a point 85% of a distance from an upstream end of the radial outside edge of the blade with respect to the axial dimension of the blade.

Fan and blower unit having the same

A drive apparatus for driving two motors by PWM control of respective switching elements connected to the motors, whereby respective control signals are applied to the switching elements such that each commencement of a transition of one of the switching elements from the non-conducting to the conducting state coincides with the termination of a transition of the other switching element from the conducting to the non-conducting state, thereby reducing generated electrical noise, and for supplying equivalent values of drive voltage to two motors of different power ratings which rotate respective cooling fans, to obtain equalized levels of air flow rate.

Drive apparatus for PWM control of two inductive loads with reduced generation of electrical noise

A vehicle front end member including at least a radiator has an upper protrusion fixed to an upper insertion hole of a vehicle front end panel, and a lower protrusion fixed to a lower insertion hole of the front end panel. When an exterior force larger than a predetermined value is applied to the vehicle from a front side, a fixing state of the upper protrusion into the upper insertion hole is released, while a fixing state of the lower protrusion into the lower insertion hole is maintained. Therefore, is can prevent all the front end member from being separated from the front end panel when the exterior force is applied to the vehicle from the front i side. Accordingly, a damage of the front end member due to the exterior force is prevented while a collision of the front end member on a road surface is prevented.

Vehicle front end structure

In a vehicle front end panel, a horn cover for defining a passage of sound generated by a horn is formed integrally with a panel body to which a front end member such as a radiator is assembled. Further, the panel body and at least a part of the horn cover are integrally molded by resin. Therefore, the horn structure including the horn and the horn cover is readily manufactured in a low cost.

Vehicle front end panel with horn cover

A vehicle cooling apparatus having a simple construction that enables the size of a cooling fan electric motor to be reduced without the need to increase the number of batteries provided for driving the motor. The cooling fan provides necessary cooling for an engine radiator and an air-conditioning system condenser by driving the motor at an input power lower than its rated power by a predetermined amount until the temperature of the engine cooling water reaches a predetermined temperature. If the water temperature rises above the predetermined temperature, the electric motor input power is increased to a level greater than its rated input power for a predetermined time period. As a result, cooling capacity can be increased and the water temperature can be lowered with a smaller motor when the water temperature has become abnormally high. Because the electric motor is normally driven at an input power lower than its rated input power, the life of the electric motor is increased.

Vehicle cooling system with system motor control apparatus

A heat exchanging system includes two cooling fans for cooling heat exchanging medium of a heat exchanger, and a control device for controlling rotational speeds of the cooling fans. The control device is attached to an outer surface of a fan shroud so that radiation fins of the control device is disposed inside the fan shroud. Further, the radiation fins of the control device is disposed between two fan accommodating portions each having a cylindrical shape. That is, the control device is disposed in a comparatively large space formed by two fan accommodating portions. Therefore, the control device can be readily attached to the fan shroud on a vehicle, and the size of the radiation fins can be made larger. Thus, the heat exchanging system cools the control device sufficiently while improving ventilation performance of the cooling fans.

Growing community of inventors

Kariya, Japan

Takuya Usami