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Description: |
| Abstract:
This invention relates to improvements in valve-gears for Diesel motors or generally for internal-combustion engines operating on the four-stroke or Otto cycle and provided with means for admitting compressed air to start the motor. In such an engine positive operation of the fuel and exhaust valves during the regular running of the engine is only required once in each cycle that is, once in two revolutions of the engine-shaft. On the other hand, in starting the machine it is desirable to admit compressed air at each revolution, so as to obtain greater certainty and effectiveness in starting. My invention provides means whereby the engine may be run on a two-stroke cycle when starting with compressed air and may then be run on a four-stroke cycle with fuel, these operations being accomplished by one and the same mechanism.
Claims:
1. In an internal-combustion engine, the combination with the fuel-valve thereof, of main eccentric mechanism operated by said engine once during each revolution of the engine, and auxiliary eccentric mechanism operated by the engine once during every two revolutions thereof, and controlling the operative relation of such main eccentric mechanism with the said fuel-valve, so as to bring said fuel-valve into operation on every other revolution.
2. In an internal-combustion engine, the combination with the cylinder provided with fuel and compressed-air valves, of eccentric mechanism operated by the engine once in every revolution thereof, valve-gear mechanism and means for controlling same to bring either the fuel-valve or the compressed-air valve into operative relation with the eccentric mechanism, auxiliary controlling mechanism operated by the engine once in every two revolutions thereof and controlling the operative relation of the said eccentric mechanism with regard to the valve-gear mechanism so as to bring said valve-gear mechanism into operation once in every two revolutions on a four-stroke cycle, and means for maintaining said auxiliary controlling mechanism in fixed position to cause operation of the valve-gear once in every revolution in a two-stroke cycle.
3. In an internal-combustion engine, the combination with valve-gear mechanism, of eccentric mechanism operated by the engine once in every revolution thereof, auxiliary controlling mechanism controlling the operative relation of the eccentric mechanism with regard to the valve-gear mechanism, means for operating said auxiliary controlling mechanism once in every two revolutions of the engine to cause the valve-gear mechanism to operate on a four-stroke cycle, and means for maintaining the auxiliary controlling mechanism in position to cause the valve gear mechanism to operate once in every revolution on a two-stroke cycle.
4. In an internal-combustion engine, the combination with fuel and compressed-air valves, adjustable valve-gear mechanism provided with means for operation of either the fuel or the compressed-air valve, means for adjusting said valve-gear to bring it into operative relation with either of such valves, and means for operating the valve-gear mechanism on a four-stroke cycle when in operative relation with the fuel-valve and on a two-stroke cycle when in operative relation with the compressed-air valve.
5. In an internal-combustion engine, the combination with fuel and compressed-air valves, adjustable valve gear mechanism adapted to be brought into operative relation with either of such valves, and means for adjusting said valve-gear to operative relation with either of such valves, operating eccentric mechanism operated by the engine on each revolution thereof, auxiliary eccentric mechanism adapted to be operated by the engine on each two revolutions thereof and con trolling the operative relation of the operating eccentric mechanism with the valve-gear mechanism, so as to operate the fuel-valve on a four-stroke cycle, a clutch connection between the engine and the auxiliary valve-gear mechanism, and means operatively connected with the valve-gear-adjusting means to disengage the clutch and hold the auxiliary controlling means in position to continually maintain the operative relation of the main eccentric mechanism and the valve-gear mechanism when the latter is in the air-valve operating position, so as to operate the compressed-air valve on a two-stroke cycle.
6. In an internal-combustion engine, the combination of fuel and compressed air valves, valve-gear mechanism adjustable to engaging relation with either of such valves, operating mechanism operated by the engine in every revolution, auxiliary controlling mechanism operated by the engine in every two revolutions, a clutch controlling the connection of such auxiliary mechanism with the engine and controlling means for said clutch.
7. In an internal-combustion engine, the combination of fuel and compressed air valves, valve-gear mechanism adjustable to engaging relation with either of such valves, operating mechanism operated by the engine in every revolution, auxiliary controlling mechanism operated by the engine in every two revolutions, a clutch controlling the connection of such auxiliary mechanism with the engine and controlling means for said clutch and for the valve-gear, operating to engage the clutch when the valve-gear is in operative relation with the fuel-valve, and to disengage the clutch when the valve-gear is in operative relation with the compressed-air valve.
8. In an internal-combustion engine, the combination of fuel and compressed air valves, valve-gear mechanism adjustable to engaging relation with either of such valves, operating mechanism operated by the engine in every revolution, auxiliary controlling mechanism operated by the engine in every two revolutions, a clutch controlling the connection of such auxiliary mechanism with the engine and controlling means for said clutch and for the valve-gear, operating to engage the clutch when the valve-gear is in operative relation with the fuel-valve, and to disengage the clutch when the valve-gear is in operative relation with the compressed-air valve, and provided with means for stopping the auxiliary controlling mechanism upon disengagement of the clutch, to maintain such mechanism in position to operate the valve-gear on a two-stroke cycle.
9. In an internal-combustion engine, the combination of fuel and compressed air valves, valve-gear mechanism adjustable to engaging relation with either of such valves, operating mechanism operated by the engine in every revolution, auxiliary controlling mechanism operated by the engine in every two revolutions, a clutch controlling the connection of such auxiliary mechanism with the engine and controlling means for said clutch and for the valve-gear, operating in one position to engage the clutch and place the valve-gear in operative relation with the fuel-valve, in another position to disengage the clutch and place the valve-gear in operation with the air-valve, and in an intermediate position to remove the valve-gear from operative-relation with both fuel and air valves.
10. In an internal-combustion engine, the combination of fuel and compressed air valves, valve-gear mechanism adjustable to engaging relation with either of such valves, operating mechanism operated by the engine in every revolution, auxiliary controlling mechanism operated by the engine in every two revolutions, a clutch controlling the connection of such auxiliary mechanism with the engine and controlling means for said clutch and for the valve-gear, operating in one position to engage the clutch and place the valve-gear in operative relation with the fuel-valve, in another position to disengage the clutch and place the valve-gear in operation with the air-valve, and in an intermediate position to remove the valve-gear from operative relation with both fuel and air valves while maintaining the disengagement of the clutch.
11. A valve mechanism comprising two valves, a reciprocating valve-gear having toes adapted to operate either valve according to the angular position of such valve-gear, operating means adapted to operate said valve-gear at two different periodicity’s, and controlling means for causing said valve-gear to come into operative relation with one of said valves when operating at one periodicity, and to come into operative relation with the other valve when operating at the other periodicity.
12. The combination with an engine, of valve mechanism comprising valve-gear, operating eccentric mechanism, auxiliary eccentric mechanism controlling the operative relation of the operating eccentric mechanism with the valve-gear, means comprising a clutch for operating said auxiliary eccentric mechanism from the engine, and disconnecting devices for said clutch comprising a cam device revolving with the clutch and a controlling device engaging such revolving cam device to open the clutch.
13. The combination with an engine, of valve mechanism comprising valve-gear, operating eccentric mechanism, auxiliary eccentric mechanism controlling the operative relation of the operating eccentric mechanism with the valve-gear, means comprising a clutch for operating such auxiliary eccentric mechanism from the engine, and disconnecting devices for said clutch comprising a cam and stop device revolving with the clutch and a controlling device engaging such revolving cam and stop device to open the clutch and stop the auxiliary eccentric mechanism in definite position. |
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