US Patent: 792,300
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| Internal Combustion Engine
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Patentee:
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| Carl W. Weiss (exact or similar names) - New York, NY |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Aug. 26, 1904 |
| Granted: |
Jun. 13, 1905 |
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Joel Havens
"Vintage Machinery" entry for Weiss Engine Co.
Carl W. Weiss-The Dean of oil engineers.
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Description: |
| Abstract:
In internal-combustion engines of the well known type to which this invention generally relates and in which the exhaust and air-inlet ports are opened by the piston as it approaches the limit of its forward stroke the exhaust-port is arranged to be opened slightly in advance of the air-inlet port. In the practical operation of such engines not only is it generally desirable to employ a muffler because of the high pressure of the exhaust, but the exhaust contains more or less unburned gases, and it has also been found that the exhaust generally contains more or less air or oxygen which has not been combined in combustion with the vapor of the fuel charge. The existence of the unburned gases and uncombined oxygen in the exhaust is perhaps due to the existence in the working cylinder at the end of each working stroke in proximity to the air-inlet port of a small volume of the mixture which is not sufficiently rich in vapor to burn or which would burn slowly if at all. Such mixture is discharged from the cylinder when the exhaust-ports opened first. At all events it has been found in the development of the present invention that what may be termed the main exhaust; viz., that which is discharged from the engine-becomes practically free from unburned gases and from uncombined oxygen if provision is made for the escape from the working cylinder of such mixture as lies near the air-inlet port before the main exhaust-port is opened. To accomplish this, there is provided what may be termed an auxiliary exhaust-port, which is preferably arranged so as to permit such mixture to escape into the air-passage which terminates in the air-inlet port or into the air compression chamber or into a chamber connected therewith, and such auxiliary port may, in fact, be in one opening with the air-inlet port, the same being arranged to be opened slightly before the exhaust-port is opened.
Claims:
1. In an internal-combustion engine, the combination of a piston, a working cylinder having a main exhaust-port arranged to be opened as the piston approaches the limit of its forward stroke, an air-inlet port and an auxiliary exhaust-port arranged to be opened in advance of the main exhaust-port, and a closed chamber communicating with the auxiliary exhaust-port, into which the gases which lie near the piston are discharged before the main exhaust takes place and from which such gases are returned to the cylinder as the pressure therein is reduced by the opening of the main exhaust, substantially as described.
2. In an internal-combustion engine, the combination of a piston, a working cylinder and an air-compression chamber, said cylinder having a main exhaust-port arranged to be opened as the piston approaches the limit of its forward stroke, and a port communicating with the air-compression chamber and arranged to be opened in advance of the main exhaust-port, substantially as described.
3. In an internal-combustion engine, the combination of a piston, a working cylinder, and a closed crank-chamber, said cylinder having a main exhaust-port arranged to be opened as the piston approaches the limit of its forward stroke, and a port communicating with said closed crank-chamber and arranged to be opened in advance of the main exhaust-port, substantially as described.
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