US767794A

US767794A - Inlet-valve gear for internal-combustion engines.

Info

Publication number: US767794A
Application number: US16800003A
Authority: US
Inventors: Alanson P Brush
Original assignee: Individual
Current assignee: Individual
Priority date: 1903-08-03
Filing date: 1903-08-03
Publication date: 1904-08-16
Anticipated expiration: 1921-08-16

Description

No. 767,794. PATENTED AUG. 16, 1904.

INLET VALVE GEAR FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED AUG. 3. 1903.

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No. 767,794. PATENTED AUG. 16, 1904.

A. P. BRUSH. I INLET VALVE GEAR FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED AUG. 3. 1903.

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A. P. BRUSH. v INLET VALVE GEAR FOR INTERNAL COMBUSTION ENGINES.

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UNITED STATES Patented August 16, 1904.

PATENT OFFICE.

ALANSON P. BRUSH, OF DETROIT, MICHIGAN.

INLET-VALVE GEAR FOR INTERNAL-COMBUSTION ENGINES.

SPECIFICATION forming part of Letters Patent No. 767,794, dated August 16, 1904.

Application filed August 3, 1903. Serial No. 168,000. (No model.)

To all whom it may concern:

Be it known that I, ALANsoN P. BRUsH, a citizen of the United States, residing at Detroit, county of WVayne, State of Michigan, have invented acertain new and useful Improvement in Inlet-Valve Gears for Internal- Combustion Engines, of which the following is a specification, reference being had to the accompanying drawings, which form a part of this specification.

. My invention has for its object certain new and useful improvements in inlet-valve gear for internal-combustion engines.

It consists of the construction, combination, and arrangement of devices hereinafter described and claimed, and illustrated in the accompanying drawings, in which- Figure 1 is a view in side elevation. Fig. 2 is a view in side elevation, showing parts broken away. Fig. 3 is a plan view. Fig. 4 is a view in side elevation, illustrating a modification of the invention. Fig. 5 is a detail view showing the parts broken away to more fully illustrate the end of the cam-rod and actuated rolls. Fig. 6 is a partial plan view with the rocker removed. Fig. 7 is a detail view in section, illustrating the eccentric governor. Fig. 8 is a similar view at right angles to that shown in Fig. 7 g

The object of my invention, more particularly, is to provide means for simultaneously increasing or decreasing the time and stroke of the inlet-valve-in other words, to increase or diminish the duration of the opening and the lift or amount of the stroke of the valve, whereby the inlet-valve may have a variable duration of the opening and amount of stroke.

I carry out my invention as follows:

In the drawings, a represents the cylinder of an internal-combustion engine. Mounted upon the cam-shaft of the engine is an eccentric b.

posite end of the cam-rod is extended under the roll k. Beneath the rocker is a horizontally-oscillatory arm m, provided with a roll '11, beneath the adjacent end of the cam-rod. This roll a is governed by a throttle-lever q, said lever being constructed with a cam-surface (indicated at r) at its upper end, bearing against a pin 8. upon the frame g. The throttle-lever is fulcrumed upon the shaft 2,, projecting from the end of the arm m. The camrod projects between the rolls It and a and is provided, adjacent to said rolls, with a camsurface (indicated at a) to bear against the roll a at the end of the stroke of the cam-rod.

The pressure of the cam-face it against the roll 11. obviously serves to lift the roll l1, and thereby to open the valve. The amount and time of said opening of the valve is determined by the position of the roll 02., which is adjusted laterally, as already described, by the lever q. The extent and duration of the opening of the valve may also be governed by the stroke of the cam-rod. As shown in Figs. 4, 7, and 8, the stroke of the said rod may be varied and governed by the eccentric b. In said figures the eccentric is shown having an elongated slot '0, through which the camshaft 20 projects. A weight as is shown attached to the eccentric governed by aspring y. I do not, however, limit myself to any particular mechanism for governing the eccentric, as any ordinary steam-engine governor employed to govern the stroke of the eccentric might be employed. lVhen the stroke of the cam-rod is governed by the eccentric, the roll a need not be laterally movable. The

lever (1 may be actuated in any desired manner, as by a rod which may be connected to a hand-lever.

It will be seen that by increasing the distance the valve unseats provision is made for increasing the amount of the mixture, and consequently for an increase in power; but by shortening the time of the opening provision is made for maintaining the high velocity of the ini iowing charge when an engine is running slowly, making it possible to use a larger carbureting device.

\Vhat I claim as my invention is 1. In an inlet-valve gear for internal-combustion engines the combination of a valve, a device for operating the valve, a reciprocatory cam-rod provided with a cam to actuate said device to simultaneously increase or decrease the duration of the opening and the stroke of the valve, and adjustable means to make the cam operative for longer or shorter portions of the reciprocations of said rod.

2. In an inlet-valve gear for internal-combustion engines the combination of a valve, a shaft, an eccentric upon the shaft, an eccentric-strap, a reciprocatory cam-rod carrying a cam and actuated by said strap, a device for operating the valve, and a movable arm below said device, said arm and said device provided with independent rollers between which the adjacent end of said rod reciprocates.

3. In an inlet-valve gear for internal-combustion engines the combination of a valve, a device for operating the valve provided with a roll, a movable arm below said device, provided with a roll, and a cam-rod carrying a cam reciprocatory between said rolls, one of said rolls adjustable to make more or less of the cam operative to open the valve.

4. In an inlet-valve gear for internal-combustion engines the combination of a valve, a device for operating the valve provided with a roll, a movable arm below said device provided with a roll, and a cam-rod having a camface reciprocatory between said rolls to force one of the rolls away from the other roll during the reciprocation of the rod in one direction.

5. In an inlet-valve gear for internal-combustion engines, the combination of a valve, a device for operating the valve provided with a roll, a movable arm below said device provided with a roll, a cam-rod reciprocatory between said rolls having a cam-face constructed to force one of the rolls away from the other roll during a portion of the reciprocation of the rod.

6. In an inlet-valve gear for internal-combustion engines the combination of a valve, a device for operating the valve provided with a roll, a reciprocatory cam-rod to actuate said device, and a movable arm below said rod provided with a roll to govern the action of the rod, said cam-rod provided with a camsurfacc, said device movable at approximately right angles to the line of the reciprocation of the cam-rod, and the roll of said arm movable parallel to the direction of the reciprocation of the cam-rod. I i

7. In an inlet-valve gear for internal-combustion engines the combination of a valve, a rocking lever to engage the stem of the valve for operating the valve, a reciprocatory cam-rod to actuate the rocking lever, and a horizontally-oscillatory arm beneath the camrod to govern the operation of said cam-rod.

8. In an inlet-valve gear for internal-combustion engines, the combination of a valve, a rocking lever provided with a roll to actuate the valve, an oscillatory arm provided with a roll, and a cam-rod provided with a camsurface movable between said rolls, to actuate the rocking lever, the action of the cam-rod governed by the position of the oscillatory arm.

9. In an inlet-valve gear for internal-combustion engines the combination of a valve, a rocking lever for operating the valve, a camrod provided with a cam-surface to actuate the rocking lever, and a horizontally-oscillatory arm beneath the cam-rod to make the operation of the cam-rod more or less effective.

10. In an inlet-valve gear for internal-combustion engines, the combination of a valve, a device for operating the valve provided with a roll, a movable arm below said device provided with a roll, a reciprocatory cam-rod provided with a cam-surface to actuate said device reciprocatory between said rolls, the cam-surface of said rod bearing upon the roll of the movable arm.

11. In an inlet-valve gear for internal-combustion engines the combination of a frame, a valve, a device for operating the valve, a reciprocatory cam-rod to actuate said device, a movable arm below said device to govern the action of the rod, and a lever mounted upon the movable arm to actuate said arm, said lever provided with a cam-surface bearing against the adjacent portion of the frame.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

ALANSON P. BRUSH.

\Vitnesses:

N. S. WRIGHT, OLA RICHARDSON.