US1922985A - Charging pump for multicylinder two-stroke combustion engines or compressors - Google Patents
Charging pump for multicylinder two-stroke combustion engines or compressors Download PDFInfo
- Publication number
- US1922985A US1922985A US569047A US56904731A US1922985A US 1922985 A US1922985 A US 1922985A US 569047 A US569047 A US 569047A US 56904731 A US56904731 A US 56904731A US 1922985 A US1922985 A US 1922985A
- Authority
- US
- United States
- Prior art keywords
- pump
- compressors
- multicylinder
- combustion engines
- cylinder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B25/00—Engines characterised by using fresh charge for scavenging cylinders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B2700/00—Measures relating to the combustion process without indication of the kind of fuel or with more than one fuel
- F02B2700/03—Two stroke engines
- F02B2700/031—Two stroke engines with measures for removing exhaust gases from the cylinder
Definitions
- the present invention relates to charging pumps for multi-cylinder two-stroke internal combustion engines or compressors and has for its object to supply the required quantity of air especially for high speed engines fed with crude oil.
- the present invention therefore consists in a two-stroke internal combustion piston engine provided with a crank case pump and a double acting auxiliary pump arranged coaxially with the main cylinder on the other side of the crank shaft so that the piston of this pump will help with its inner face to effect the suction and the preliminary compression of the charge.
- the novelty resides in that the machine comprises at least two complete units consisting of working and pump cylinders displaced at 180 the outer side of each auxiliary pump being in constant open communication with the crank case of the said units.
- FIG. 1 is a longitudinal section
- Fig. 2 a plan Fig. 3 a cross section and Fig. 4 is a diagrammatical View.
- the cylinders are divided in groups of two.
- the cylinders 1, 2 and 3, 4 are two such groups.
- 5, 6, '7 and 8 are the appertaining charging pumps.
- the cranks of the power pistons and pump pistons are mutually displaced at 180 but also the cranks of the power pistons and the cranks of the two pump pistons.
- the chambers of the two pump cylinders 5', 6' are communicating mutual- 0 ly with the chambers of the crank chambers 9 and 10 by passageways 5 6 opening at the bottom of the pump chambers at 5 6
- the pistons of the power cylinders 3, 4 and the pump pistons '7, 8 and the crank chambers 11, 12 are arranged accordingly.
- the exhaust orifice 13 and the inlet orifice 14 of the air are so arranged, that the former is overlapped by the power piston in its upper dead center and the latter in the lower dead center position of the piston.
- Each crank chamber is communicating with the chamber of the power cylinder by an overflow passageway at opening between the exhaust and the air inlet.
- the pump pistons are double acting and the dimensions of the chambers are chosen so that these pumps will feed a volume of air which is a multiple of that of the volume of the power cylinder.
- a multi-cylihder two stroke internal combustion engine and in combination with charging pumps power cylinders arranged in groups of pairs, a common crankshaft with cranks disr placed in each pair-at 180, pump cylinders one for each power cylinder and juxtaposed to them with regard to said crank shaft, separate crank cases open towards the chambers of each set of power and pump cylinder, passageways mutually connecting in each group the crank cases of one power cylinder to the compression chamber of the pump of the other cylinder, air inlets arranged so as to be overlapped in the lower dead center position of the power piston and exhaust orifices r arranged so as to be overlapped in the upper dead center position of the power piston.
Description
W. STEIGER Aug. 15, 1933.
CHARGING PUMP FOR MULTICYLINDERTWO-STROKE comBusnou ENGINES 0R COMPRESSORS 2 Sheets-Sheet 1 a 4 .OA U I I|||1 z a h 0 Q m EEE: 9 Wm i Z a w. STEIGER 1,922,985
STROKE COMBUSTION ENGINES OR COMPRESSORS Aug. 15, 1933.
CHARGING PUMP FOR MULTICYLINDER TWO 1931 2 Sheets-Sheet 2 Filed Oct. 15
I Viii'ioiizi Patented Aug. 15, 1933 CHARGING PUMP FOR MULTICYLINDER TVVO-STROKE COMBUSTION ENGINES OR COMPRESSORS Walther Steiger, Bern, Switzerland Application October 15, 1931, Serial No. 569,047, and in Germany October 22, 1930 1 Claim.
The present invention relates to charging pumps for multi-cylinder two-stroke internal combustion engines or compressors and has for its object to supply the required quantity of air especially for high speed engines fed with crude oil.
Since a two-stroke crude oil motor needs considerably more air for obtaining a good output than is needed for a two-stroke petrol motor the ordinary charging pumps would not suffice and charging devices of greater capacity would be required. But such larger devices would have to be separated from the crank chamber and would require separate driving and controlling means.
The present invention therefore consists in a two-stroke internal combustion piston engine provided with a crank case pump and a double acting auxiliary pump arranged coaxially with the main cylinder on the other side of the crank shaft so that the piston of this pump will help with its inner face to effect the suction and the preliminary compression of the charge.
The novelty resides in that the machine comprises at least two complete units consisting of working and pump cylinders displaced at 180 the outer side of each auxiliary pump being in constant open communication with the crank case of the said units.
The annexed drawings represent diagrammati cally a wor ing example of a four cylinder plant. There Fig. 1 is a longitudinal section,
Fig. 2 a plan Fig. 3 a cross section and Fig. 4 is a diagrammatical View.
According to the drawings the cylinders are divided in groups of two. The cylinders 1, 2 and 3, 4 are two such groups. 5, 6, '7 and 8 are the appertaining charging pumps. Not only the cranks of the power pistons and pump pistons are mutually displaced at 180 but also the cranks of the power pistons and the cranks of the two pump pistons. Besides the chambers of the two pump cylinders 5', 6' are communicating mutual- 0 ly with the chambers of the crank chambers 9 and 10 by passageways 5 6 opening at the bottom of the pump chambers at 5 6 In a similar way also the pistons of the power cylinders 3, 4 and the pump pistons '7, 8 and the crank chambers 11, 12 are arranged accordingly. The exhaust orifice 13 and the inlet orifice 14 of the air are so arranged, that the former is overlapped by the power piston in its upper dead center and the latter in the lower dead center position of the piston. Each crank chamber is communicating with the chamber of the power cylinder by an overflow passageway at opening between the exhaust and the air inlet.
According to this arran ement the working is as follows:
If the piston of the first cylinder of the first group, as seen from Fig. 4 assumes the outer dead center position and the piston of the second cylinder assumes the inner dead center position a vacuum is formed between pistons 1 and 5 in the crank case 9 and under the piston 6 of the second group and fresh air will fill these chamhere through the unlapped air inlet 14. On the other side the air between pistons 2 and 6 and under the piston 5 will be compressed and pressed into the upper chamber of the cylinder 2 through the passageway 15. The crank case communicates with the power cylinder through the passageway a, which also aiiords communication. between the crank case and the inlet and exhaust orifices. But since also the exhaust orifice 13 is free said cylinder 2 will have his scavenging or his filling while in the cylinder 1 the compression is ready for injecting the fuel and for firing.
Thus the pump pistons are double acting and the dimensions of the chambers are chosen so that these pumps will feed a volume of air which is a multiple of that of the volume of the power cylinder.
Of course this arrangement of the air pump could also be employed for air compressors.
What I claim is:
In a multi-cylihder two stroke internal combustion engine and in combination with charging pumps, power cylinders arranged in groups of pairs, a common crankshaft with cranks disr placed in each pair-at 180, pump cylinders one for each power cylinder and juxtaposed to them with regard to said crank shaft, separate crank cases open towards the chambers of each set of power and pump cylinder, passageways mutually connecting in each group the crank cases of one power cylinder to the compression chamber of the pump of the other cylinder, air inlets arranged so as to be overlapped in the lower dead center position of the power piston and exhaust orifices r arranged so as to be overlapped in the upper dead center position of the power piston.
WALTHER STEIGER.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1922985X | 1930-10-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
US1922985A true US1922985A (en) | 1933-08-15 |
Family
ID=7749548
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US569047A Expired - Lifetime US1922985A (en) | 1930-10-22 | 1931-10-15 | Charging pump for multicylinder two-stroke combustion engines or compressors |
Country Status (1)
Country | Link |
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US (1) | US1922985A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2522649A (en) * | 1945-10-06 | 1950-09-19 | William L Tenney | Two-stroke cycle engine cylinder and pump |
US3194223A (en) * | 1963-02-21 | 1965-07-13 | Inpaco Trust | Two cycle engine |
-
1931
- 1931-10-15 US US569047A patent/US1922985A/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2522649A (en) * | 1945-10-06 | 1950-09-19 | William L Tenney | Two-stroke cycle engine cylinder and pump |
US3194223A (en) * | 1963-02-21 | 1965-07-13 | Inpaco Trust | Two cycle engine |
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