From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Article detailing eight patents assigned to General Motors Corp. for passenger car induction and cooling systems.
| Identifier | ExFiles\Box 128\3\ scan0036 | |
| Date | 22th April 1939 | |
| 523 Passenger Car Covered in eight patents recently issued and assigned to General Motors Corp. pass passage around the blower is opened (so that the blower will not “lock” when its outlet is closed or nearly closed), and the carburetor fuel-metering valve is set to provide the proper mixture for idling. As the accelerator pedal is depressed, the blower by-pass passage is closed and the main inlet passages to the cylinders are opened gradually. If any unvaporized fuel collects in the by-pass to the blower while idling, it is drawn back into the carburetor through the tube extending from the lowest point of the by-pass to the carburetor, by the difference in the gaseous pressures in the blower by-pass and the carburetor air tube respectively. The principal object in the development of this induction system seems to have been to improve the idling characteristics, which in conventional two-stroke engines usually leave something to be desired. The cooling system covered by one of the patents includes three small radiators, one located in the rear, directly over the transmission housing, and two at the front, outside the closed front luggage compartment and directly beneath the headlamps. The rear-mounted radiator, which is intended mainly to provide the necessary cooling capacity while the car is at a standstill and the engine is idling, is of the horizontal flow type, with a tank on each side. There is a louvered air inlet in the side of the body, and an air duct with an engine-driven fan in it extends from this inlet to the radiator housing. Fig. 4 — Schematic view of the cooling system lay-out Fig. 3 — Section through engine cylinders and concentric valves in the induction system A, exhaust port; B, inlet port; C, main passage to inlet port; D, auxiliary passage to inlet port for idling; E, rotary valve; F, change-over valve; G, toothed sector with which meshes a pinion for the control of the change-over valve. By mounting two small radiators under the headlamps, advantage is taken of the draft created by the motion of the vehicle, and the need for fans is eliminated; the luggage compartment can be closed and, therefore, kept clean. As the hot water from the engine is carried forward to these radiators, it is an easy matter to install a car heater in front of the driver’s seat. Rear-mounted radiators in general are not as satisfactory as front-mounted ones, because they do not benefit by the draft created by the motion of Automotive Industries April 22, 1939 | ||