US2010696A - Fuel pump for internal-combustion engines - Google Patents
Fuel pump for internal-combustion engines Download PDFInfo
- Publication number
- US2010696A US2010696A US724539A US72453934A US2010696A US 2010696 A US2010696 A US 2010696A US 724539 A US724539 A US 724539A US 72453934 A US72453934 A US 72453934A US 2010696 A US2010696 A US 2010696A
- Authority
- US
- United States
- Prior art keywords
- fuel
- pump
- internal
- combustion engines
- oil
- 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
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/20—Varying fuel delivery in quantity or timing
- F02M59/34—Varying fuel delivery in quantity or timing by throttling of passages to pumping elements or of overflow passages, e.g. throttling by means of a pressure-controlled sliding valve having liquid stop or abutment
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M2700/00—Supplying, feeding or preparing air, fuel, fuel air mixtures or auxiliary fluids for a combustion engine; Use of exhaust gas; Compressors for piston engines
- F02M2700/13—Special devices for making an explosive mixture; Fuel pumps
- F02M2700/1317—Fuel pumpo for internal combustion engines
- F02M2700/1358—Fuel pump with control of fuel inlet to the pumping chamber
Definitions
- the object of the presentinvention is to overcome the difficulty of lubrication, and the invention consists in utilizing for the lubrication of the pump pistons the oil which is added to the fuel, by first feeding the oil through the lubricating grooves of the piston guides and thence into the fuel supply duct.
- the pump comprises a block A containing, for each cylinder of the internal-combustion engine,
- a pump piston C by means of which light liquid fuel is forced into the cylinder;
- the pistons are guided in sleeves D surrounded by grooves S all of which communicate through a duct R with the supply pipe P of the fuel.
- a port T in each sleeve admits fuel into the latter when the port is un- 40 covered by the piston, the admitted fuel being eventually forced by the piston past a pressure valve U into the cylinder.
- the pistons are operated by-cams V in opposition to springs.
- the sleeves are each provided with an internal lubricating groove E which communicates through a duct G with an external groove D, and the grooves D of all the sleeves communicateJwith one another through a duct H.
- the latter communicates through a 50 pressure valve L with a sleeve K in which a piston J, operated by a cam W, works for feeding lubrithe communication being controlled by a spring valve 0.
- the pump J In order to prevent the oil from being repressed by the fuel in the sleeves B, the pump J must operate with a pressure slightly greater than that 15 with which the fuel acts on the circumference of the piston. It may in some cases be sufficient to feed the oil through the duct H by gravity from an elevated supply, in which case the pump J can be omitted.
- An alteration in the rate of feed for instance an increase in the feed during/starting, may be obtained by the usual means, for instance by regulating the spring pressure on the valve 0, or the area of the feed orifice, when working with static pressure.
- A' fuel supply pump for internal-combustion engines having separate fuel supply and lubricating ducts, and means for feeding a lubricant first in series through the lubricating ducts and thence into the fuel supply ducts for admixture with the fuel.
- a fuel supply pump for internal-combustion engines comprising a pump block, a plurality of pump pistons in said block, a guide sleeve for each piston provided with a lubricating groove,
- a fuel supply pumpas claimed in claim 2 wherein the means for forcing the lubricant through the ducts comprises a pump included in the block, and a container supplying oil to said latter pump.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
- Fuel-Injection Apparatus (AREA)
Description
Aug. 6, 1935. R. L'ORANGE 2,010,696
FUEL PUMP FOR INTERNAL COMBUSTION ENGINES V Filed May8, 1934 Patented Aug. 6, 1935 FUEL PUMP FOR INTERNAL-CONIBUSTION ENGINES Rudolf LOrange, Stuttgart-Feuerbach, Germany Application May a, 1934, Serial No. 724,539 In Germany May 10, 1933 3 Claims. (01. 123-196) The efficient lubrication of pump pistons which supply light liquid fuel to internal-combustion engines, presents certain diiiiculties. Lubrication from within the cam box is insufficient and 5 often leads to a dilution of the oil in the box with fuel leaking through the piston guides. Di- .rect lubrication of the pistons through grooves made in the piston guides has the drawback that the oil, since it gets diluted with light fuel, will be unsuitable for further use after it has passed through the pump.
It is known to mix the fuel with lubricating oil for the lubrication of parts of the engine with which it comes into contact. The quantity of 011 thus added to the fuel is, however, very small, and does not suffice for the lubrication of the pump.
'The object of the presentinvention is to overcome the difficulty of lubrication, and the invention consists in utilizing for the lubrication of the pump pistons the oil which is added to the fuel, by first feeding the oil through the lubricating grooves of the piston guides and thence into the fuel supply duct.
The oil thus fed through the lubricating grooves of the pistons will be sufficient to maintain the latter properly lubricated, and the dilu-' tion of the oil with fuel is immaterial, since it is intended for eventual admixture with the fuel.
The invention is illustrated in the accompanying drawing which represents a partly sectional view of the pump.
The pump comprises a block A containing, for each cylinder of the internal-combustion engine,
a pump piston C by means of which light liquid fuel is forced into the cylinder; The pistons are guided in sleeves D surrounded by grooves S all of which communicate through a duct R with the supply pipe P of the fuel. A port T in each sleeve admits fuel into the latter when the port is un- 40 covered by the piston, the admitted fuel being eventually forced by the piston past a pressure valve U into the cylinder. The pistons are operated by-cams V in opposition to springs.
For lubricating the pistons the sleeves are each provided with an internal lubricating groove E which communicates through a duct G with an external groove D, and the grooves D of all the sleeves communicateJwith one another through a duct H. The latter communicates through a 50 pressure valve L with a sleeve K in which a piston J, operated by a cam W, works for feeding lubrithe communication being controlled by a spring valve 0.
From this arrangement it will be seen that a lubricating oil, after having lubricated all the 10 pistons, will be fed into the duct R for admixture in known manner with the fuel.
In order to prevent the oil from being repressed by the fuel in the sleeves B, the pump J must operate with a pressure slightly greater than that 15 with which the fuel acts on the circumference of the piston. It may in some cases be sufficient to feed the oil through the duct H by gravity from an elevated supply, in which case the pump J can be omitted.
An alteration in the rate of feed, for instance an increase in the feed during/starting, may be obtained by the usual means, for instance by regulating the spring pressure on the valve 0, or the area of the feed orifice, when working with static pressure.
I claim: I
1. A' fuel supply pump for internal-combustion engines having separate fuel supply and lubricating ducts, and means for feeding a lubricant first in series through the lubricating ducts and thence into the fuel supply ducts for admixture with the fuel.
2. A fuel supply pump for internal-combustion engines, comprising a pump block, a plurality of pump pistons in said block, a guide sleeve for each piston provided with a lubricating groove,
9. fuel supply duct connecting the different guide sleeves, a lubricating duct connecting the differentlubricating groovesand communicating at its far end with the inlet end of the fuel supply duct, and means for feeding a lubricant through the lubricating duct and thence into the fuel supplyduct for admixture with the fuel.
3. A fuel supply pumpas claimed in claim 2 wherein the means for forcing the lubricant through the ducts comprises a pump included in the block, and a container supplying oil to said latter pump.
. rumou LORANGE. so
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2010696X | 1933-05-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
US2010696A true US2010696A (en) | 1935-08-06 |
Family
ID=7956075
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US724539A Expired - Lifetime US2010696A (en) | 1933-05-10 | 1934-05-08 | Fuel pump for internal-combustion engines |
Country Status (1)
Country | Link |
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US (1) | US2010696A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2936857A (en) * | 1954-10-01 | 1960-05-17 | Gen Motors Corp | Engine lubricating system |
US2983335A (en) * | 1954-10-01 | 1961-05-09 | Gen Motors Corp | Engine lubricating system |
US4458643A (en) * | 1982-03-09 | 1984-07-10 | Diesel Kiki Co., Ltd. | Lubricating oil feeding device for fuel injection pumps |
-
1934
- 1934-05-08 US US724539A patent/US2010696A/en not_active Expired - Lifetime
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2936857A (en) * | 1954-10-01 | 1960-05-17 | Gen Motors Corp | Engine lubricating system |
US2983335A (en) * | 1954-10-01 | 1961-05-09 | Gen Motors Corp | Engine lubricating system |
US4458643A (en) * | 1982-03-09 | 1984-07-10 | Diesel Kiki Co., Ltd. | Lubricating oil feeding device for fuel injection pumps |
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