US1694171A - Temperature-controlling apparatus for internal-combustion engines - Google Patents

Description

F. M. FURBER APPARATUS FOR INTERNAL COMBUSTION ENGINES Filed May 27, 1916 TEMPERATURE CONTROLLING I 0 9 .1 1 I 1 71, 1 r'z 1- z a a /E E {W 5 '21 I '/I 1.1.2.: 1 ,5; g

UNITED STATES PATENT Patented Dec. 4, 1928.

OFFICE.

FREDERICK ML FURBER, OF REVERE, MASSACHUSETTS.

TEMPERATURE-CONTROLLING AYPARATUS FOR INTERNAL-COMBUSTION ENGINES.

Application filed May 27, 1916. Serial No. 100,411.

The invention relates to the automatic controlling of temperature in internal combustion engines and has particular reference to much, however, as the limits within which it is desirable to maintain the temperature are comparatively close to each other, it is difficult to obtain an effective thermal motor which will be operated by such slight temperature changes.- I have therefore devised a construction in which the shutters or other mechanism are operated by motive power other than that derived from temperature variations, but which is nevertheless controlled thereby. 7

Any suitable motor may be employed in my improved constructiomand this may be operated from any suitable source of power; but as specifically shown I employ a pneumatic motor operated by the suction or vacuum derived from the inlet manifold of the engine. I In the drawings:

Figure 1 is a side elevation of an internal combustion engine and cooling system to which my improvement is applied;

Figure 2 is a front elevation thereof, partly in section; 1

Figure 3 is asection through the pneumatic motor; and

Figure 4 isa section through the thermal motor.

A is an internal combustion engine provided with an inlet manifold B connected to the carburetor C. D is a.- radiator which is connected to the water-jacket of the engine by the'out-going and return conduits E and F.

" e G is a series of shutters arranged to cover a portion or all of the radiating surface and to vary the quantity of air which is accessible to the radiator. As shown, these shutters are formed by stationary and movable register slides H and H, the former being attached to the radiator frame and the latter guided to be movable in relation thereto.

To actuate themovable re ister slide H, a pneumatic motor is provi ed, preferably comprising a cylinder I having-a piston J therein, which is connected by a shank K to said movable slide. The cylinder I is secured in fixed position and has connected thereto a conduit L which leads to the inlet manifold B of the engine. At one point in this conduit there is'arranged a valve M which is controlled by ,a thermal motor under the influence of the heat from the engine. Preferably, the thermal motor is secured to the outlet conduit E of the water cooling system and comprises a bar N inserted into the conduit E so as to transfer heat from said conduit to the thermostat member which carries the valve M.

With the construction described in operation, the movable shutter is held normally in oneposition, either opened or closed, by a suitable yielding pressure, such as that of a spring 0 in the cylinder, I bearing against the piston J. When the engine is operating the suction produced in the intake manifold W111 be communicated to the. conduit L and through the latter to the cylinder I, if the valve M is opened. The fall in pressure in the cylinder will cause the atmospheric pressure operating on the outer end of the piston to overcome the pressure of the spring and to shift the slide. Whenever the temperature of the water passing through the conduit E changes, this will cause a corresponding heating of the bar N and an expansion of the thermostatic member carrying the valve M. which at, a predetermined. temperature will close the valve M, cutting off connection between the cylinder I and the suctionconduit and permitting the spring 0 to return the piston J. Assuming that the valve M is open at the low temperature limit and is closed at the high temperature limit, themotor must be so arranged that the spring will open the shutters and the suction will close the same. Thus when the engine is cold, but in operation, the suction will be communicated to the cylinder I and the piston operated to close the shutters, facilitating the heating of the motor and circulating water until the desired temperature is obtained. Any further rise in temperature willcause the warping of the bar valve M, which will result in gradually opening the shutters, to permit more air-to pass through the radiator and to effect gradual 4 cooling. It is obvious that in theconstruction described, a much more sensitive and more ac- N and the gradual closing of the where the work of shifting the shutters mustcurate ope ting device is obtained than be rformed by a thermal motor operating un er slilghttemperature changes. What claim as my invention is 1. The combination of an internal combustion engine, a cooling system therefor including a radiator, means for controlling the flow temperature.

2. The combination of an internal combustion engine, a cooling system therefor including a radiator, means for controlling the flow of air through the radiator, said means comprising a shutter device associated with the radiator, means directly responsive to suction produced in the engine cylinders for holding said shutter device closed until the engine reaches a predetermined temperature, an

means for moving such shutters to open osition, automatically, upon the suction bemg shut ofl.

3. The combination of an internal combustion engine, a cooling system therefor including a radiator, means for controlling the flow 'of air through the radiator, said means comprising a shutter device associated with the radiator, and means automatically operating incident to the operation of the engine'for holding said shutter device closed until the engine reaches a redetermined temperature and a thermostatic device for rendering sai last-mentioned means inoperative when the engine reaches a predetermined temperature.

In testimony whereof I aflix my signature.

FREDERICK M. FURBER.

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