Abstract: A motor vehicle has an electric propulsion motor which is cooled in an air radiator by air forced through the latter by a blower. The blower and air radiator are arranged in an air circuit in series with each other. The air circuit is a closed loop which includes the cabin, so that all the air passing through the air radiator comes from the cabin and can be adjustably recycled back into the cabin or exhausted to the outside. The circuit includes two parallel branches, with an auxiliary electric radiator placed in one of these branches downstream of the blower and the air radiator. A mixing valve enables the proportion of the total air flow passing through the branch containing the auxiliary radiator to be adjusted according to the heating requirements in the cabin.

Abstract: A heating and/or air conditioning apparatus for the cabin of a motor vehicle includes an air blower unit which is supplied with fresh air from outside the vehicle through a fresh air admission duct, and with air from within the cabin of the vehicle for recycling through the apparatus, this air being introduced through a recycling air admission duct. The apparatus also includes adjusting means for adjusting the proportions of the flows of air through the two respective admission ducts. A deodorant filter is placed removably in the recycling air admission duct.

Abstract: An air circulation device for moving air within an automotive vehicle passenger compartment having a temperature conditioning system, a blower, and an intake air circulation duct, the intake air circulation duct having walls which are pierced by an outlet orifice, a first intake orifice, and a second intake orifice, the first and second intake orifices being selectively sealed by a primary valve assembly containing one or more directional flow control valves through which interior passenger compartment air may flow via the first intake orifice to the outside, thereby relieving unwanted positive air pressure within the passenger compartment.

Abstract: The quality of the external air is determined by means of a pollutant sensor. The quality of the internal air is determined by calculation taking account of the air quantities introduced from outside into the internal space. A decision between air supply operation and air recirculation operation is then made on the basis of a comparison of the air qualities inside and outside. The pollutant sensor is preferably located in a casing whose internal space is accessible to gases through an opening which is preferably sealed by a gas-permeable membrane.

Abstract: A ventilation arrangement for the interior of a motor vehicle, having at least a heating or air-conditioning unit. The ventilation arrangement has a fan for air exchange in the interior and a filter for the adsorption of odorous and/or harmful substances contained in the air stream. The filter is designed so that, for the widest possible spectrum of odorous and/or harmful substances, a filter effect is produced which is based on rapid adsorption of the odorous and harmful substances and a gradual desorption thereof with a long time delay. A high short-term concentration of the odorous and/or harmful substances is thus converted by the filter into an extremely low but, instead, long-lasting emission which, with sufficiently extensive dilution, remains below a preset odor threshold or nuisance threshold.

Abstract: Ventilator roof for use in motor vehicles with a roof opening in a fixed roof surface which can be closed by a cover. The cover can be swung by pivoting around a pivoting axis, at, or near its rear edge, into a ventilation position in which the cover front edge is below the roof surface, while the cover rear edge is kept at the height of the roof surface, and a ventilation gap is formed between the cover front edge and the front edge of the roof opening. At least one electrically powered blower is built into a ventilation channel leading from the ventilation gap into the vehicle interior. The blower can be powered by solar cells or the on-board vehicle power unit (battery) with safeguards to prevent use when the vehicle power unit lacks sufficient charge. In some embodiments, arrangements are also provided to enable the blower to provide ventilation of the interior space of the vehicle even when the cover is closed.

Abstract: An air induction device for use in a motor vehicle. The vehicle has first and second air passages through which outside air and inside air pass respectively. The air induction device comprises a casing in which a motor-driven blower fan is installed. The casing has upper and lower portions. The upper portion has at least two openings which are respectively connected to the first and second air passages and selectively closed and opened by a door structure. The lower portion includes a bottom wall portion and two inclined side wall portions which are raised from a periphery of the bottom wall portion. An outlet passage conveys air from the interior of the casing to a remote position. The two inclined side wall portions are formed with respective lower inlet openings which are connected to the second air passage and selectively closed and opened by respective pivot doors. Each door is arranged to pivot outside the casing.

Abstract: A multiple entry air intake passage for a heating and air conditioning system has a first inlet for receiving fresh air and a second inlet for receiving recirculation air, the second inlet having two distinct openings in two walls of the passage housing for increasing the flow of air into the system. An L-shaped damper door has a main portion disposed to seal a main opening of the second inlet, and an auxiliary portion disposed to seal an auxiliary opening of the second inlet. The L-shaped damper door is pivotally mounted onto the housing of the air intake passage to allow pivoting movement between the fresh air and recirculation air positions.

Abstract: An automotive heater and air conditioning system has multiple zones each supplied by a separate air flow passage serviced by a common blower and common heat exchangers. One of the passages has an adjustable air flow mechanism which bypasses some air from the passage without disturbing the air flow in other passages. A bypass port in the one passage at a point near the blower outlet is controlled by an adjustable door which is pivotally mounted in the passage at the downstream edge of the port. An induction housing receives air from the bypass port and returned it to the intake if the blower.

Abstract: A passenger compartment air filter arrangement for motor vehicles having a ventilation or air-conditioning system is provided with a filter for the air sucked in out of the passenger compartment of a motor vehicle. The filter is installed directly behind the cover of an intake channel. On the inlet side of the channel, the housing has a web-like flange which presses in a sealing manner into damping material of the foot space cover when the cover with the filter and a foot space cover are mounted, to achieve a good suction effect and noise damping.