Air heating system of internal combustion engine-mounted motor v

Details Air heating system of internal combustion engine-mounted motor v Air heating system of internal combustion engine-mounted motor v

1980-05-20

1982-10-26

Makay, Albert J.

Heating systems

Heat and power plants

Vehicle

98 206, 236 13, B60H 102

Patent

active

043557538

ABSTRACT:
A damper door unit is swingably disposed in an air intake duct for selectively permitting outdoor intake introduction and indoor air introduction. The damper door unit comprises a main door which is swingably connected to the air intake duct to selectively close an outdoor air intake opening and an indoor air intake opening, and an auxiliary door which is swingably connected to the main door to selectively close and open an opening formed in the main door. When of warming of the passenger compartment is required, the main door takes a position to achieve outdoor air introduction. However, under low speed cruising of the vehicle or at standstill of the vehicle with the engine idling, the auxiliary door opens to a certain extent thereby permitting a certain degree of indoor air introduction.

REFERENCES:
patent: 2237477 (1941-04-01), Colvin
patent: 2627218 (1953-02-01), Katz
patent: 2835183 (1958-05-01), Miller
patent: 2836113 (1958-05-01), Seyfarth
patent: 2893700 (1959-07-01), Boylan

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