US1993759A - Fuel injection pump - Google Patents
Fuel injection pump Download PDFInfo
- Publication number
- US1993759A US1993759A US672535A US67253533A US1993759A US 1993759 A US1993759 A US 1993759A US 672535 A US672535 A US 672535A US 67253533 A US67253533 A US 67253533A US 1993759 A US1993759 A US 1993759A
- Authority
- US
- United States
- Prior art keywords
- fuel
- piston
- chamber
- pump
- injection
- 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
- F02M59/20—Varying fuel delivery in quantity or timing
- F02M59/22—Varying quantity or timing by adjusting cylinder-head space
-
- 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
- F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
- F02M45/02—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts
- F02M45/04—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts with a small initial part, e.g. initial part for partial load and initial and main part for full load
- F02M45/06—Pumps peculiar thereto
-
- 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
- F02M59/24—Varying fuel delivery in quantity or timing with constant-length-stroke pistons having variable effective portion of stroke
- F02M59/26—Varying fuel delivery in quantity or timing with constant-length-stroke pistons having variable effective portion of stroke caused by movements of pistons relative to their cylinders
-
- 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
- F02M2700/1388—Fuel pump with control of the piston relative to a fixed cylinder
Definitions
- This invention relates to fuel injection pumps for internal combustion engines, and particularly to such pumps capable of providing two injection periods, first pre-injection and then the main injection.
- An object of the invention is to simplify the construction of such pumps.
- the accompanying drawing illustrates the pump at its outer dead center position.
- the pump housing 0. contains the cylinder b with its piston c.
- the radial return port (I and suction port e terminate in the annular passage f, to which the fuel inlet pipe L is connected.v
- a pressure valve 9 and nipple h are arranged axially of the cylinder at its upper end and are connected to the fuel outlet pipe i which leads to an injection nozzle (not shown).
- the piston c is provided with an integral control member 70 having the groove q, the edge m curved for a part of its length, and the stem 'n.v
- the radial bore 3 has a portion of small diameter, and also a portion of larger diameter containing a piston t which is controlled by aspring u bearing against the piston and the screw plug 1
- the pin w limits the backward movement of the piston t, which is displaceable against the spring at a pressure less than that required to open the valve 9, and which, upon such displacement, forms a storage chamber :c in bore s.
- valve g is again forced open.
- the main injection period then starts and it continues until the port 01 is uncovered at the rim m of the control member.
- Valve y then closes as a result of the reduced fuel pressure and piston t is moved Serial No. 672,535 June 21, 1932 the spring w to the position shown.
- the fuel continues to be forced out of chamber r through port 12 until the its pressure stroke.
- gle pumps may be rea In this way, many sin-.
- the contour of rim m may be such as to vary the amount of the period of pre-injection relatively to the main injection so as to conform any engine.
- trol member on the piston constructed and adapted to connect the port and the storage chamber to the fuel chamber.
- a fuel chamber having a supply port, a piston, the pump containing a storage chamber, and a control member constructed and arranged to automatically connect the storage chamber to the fuel chamber when the port is closed at a point in the pressure stroke of said piston subsequent to the beginning of the affective discharge stroke thereof.
- a fuel chamber having a supply port a piston
- the pump containing a pressure storage chamber having an adjustable volume, and a positively actuated control member constructed and arranged to automatically connect the storage chamber to the fuel chamber when the port is closed at a predetermined point in the pressure stroke of said piston.
- a fuel chamber a piston
- the pump having a storage chamber connected thereto, and a control member constructed and arranged to automatically close the connection between the storage chamber and the fuel chamber during the initial portion of the pressure stroke of said piston and to open the connection thereafter, the storage chamber havinga variable volume with an ad- J'ustable maximum value.
- a fuel chamber having a return port, and an integral piston and control member
- said pump containing a storage chamber
- said control member being constructed and arranged to connect the storage chamber to the fuel chamber when the port is closed at a predetermined point in the pressure stroke of said piston.
- a fuel pump for supplying fuel to internal combustion engines including means for interrupting the delivery of fuel from said pump after a part of the injection for a given cycle has been effected, said means including a pressure storage chamber having a passage connected with said pump, automatic means to close said passage during the early portion of the delivery period of said pump, automatic means to open said passage, whereby said interruption is effected until the pressure in said chamber is raised to the pump discharge pressure.
- control means automatically connecting the pump chamber and the storage chamber after a part of the effective delivery stroke of said pumping member, so that the eilective delivery to the injection nozzle is interrupted until the storage chamber is filled up to a pressure overcoming the resistances in the outlet pipe and nozzle, and means for releasing the pressure in the storage chamber when the effective delivery stroke has ceased.
- an injection pump for internal combustion engines having a pump chamber, a reciprocating pumping member, an inlet, an outlet valve normally under closing pressure, and a storage chamber
- a control means carried by the pumping member automatically connecting the pump chamber and the storage chamber constructed and arranged so that the effective delivery through the outlet valve is initiated and then interrupted until the storage chamber is filled up to a pressure overcoming the pressure on the outlet valve, and a return port connected to said inlet for releasing the pressure in the storage chamber when the effective delivery stroke has ceased.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Description
March 12,1935. F. w. STOCKMEYER 1,993,759
' FUEL INJECTION PUMP Filed May 24, 1953 Patented Mar. 12, 1 935 FUEL INJECTION PUMP Friedrich Wilhelm Stockmeyer,
Stuttgart, Germany, assignor to Robert Bosch Aktiengesellschaft, Stuttgart, Germany I Application May 24, 1933,
In Germany 9 Claims.
This invention relates to fuel injection pumps for internal combustion engines, and particularly to such pumps capable of providing two injection periods, first pre-injection and then the main injection.
An object of the invention is to simplify the construction of such pumps.
The accompanying drawing,'in vertical section, illustrates the pump at its outer dead center position. The pump housing 0. contains the cylinder b with its piston c. The radial return port (I and suction port e terminate in the annular passage f, to which the fuel inlet pipe L is connected.v A pressure valve 9 and nipple h are arranged axially of the cylinder at its upper end and are connected to the fuel outlet pipe i which leads to an injection nozzle (not shown).
The piston c is provided with an integral control member 70 having the groove q, the edge m curved for a part of its length, and the stem 'n.v
reduced in diameter to form the annular passage p which is thus in continual communication with the fuel chamber 1". The radial bore 3 has a portion of small diameter, and also a portion of larger diameter containing a piston t which is controlled by aspring u bearing against the piston and the screw plug 1 The pin w limits the backward movement of the piston t, which is displaceable against the spring at a pressure less than that required to open the valve 9, and which, upon such displacement, forms a storage chamber :c in bore s.
The operation of the pump is as follows: In the position shown, which is at the beginning of the upward or pressure stroke of the piston c,
the ports d and e are open and the duct s is closed. I
At the beginning of the pressure stroke, fuel from chamber 1- is forced through ports d and 6 until they are entirely covered by control member k. Upon further upward'movement of the piston, the pressure valve 9 is forced off its seat and the pro-injection of the fuel from chamber r starts. This pre-injection then continues until rim m begins to uncover port s, whereupon the pressure of the fuel in chamber? is applied to piston t, causing it to recede. The fuel pressure is thereby decreased sufliciently for valve 9 to close. This then ends the pre-injection period, but after chamber a: is filled, the fuel pressure again rises,
as a result of the further upward movement of piston 0, until valve g is again forced open. The main injection period then starts and it continues until the port 01 is uncovered at the rim m of the control member. Valve y then closes as a result of the reduced fuel pressure and piston t is moved Serial No. 672,535 June 21, 1932 the spring w to the position shown. The fuel continues to be forced out of chamber r through port 12 until the its pressure stroke.
from pipe L into chamb piston reaches the extreme top of During the downward orsuc'tion stroke to the position shown, fuel is drawn 5 er 1', again filling it as well as the passages f, p and q.
The movement of the piston between the end of the pre-injection and the beginning of the main injection periods m the tension of the spring ay be varied by varying 1;-, and also by varying the volume of storage chamber a: by screwing plug 12 in or out.
At the extreme inner position of plug 1;, the two periods are merged into one, and at its extreme outer position the two periods are most widely separated.
gle pumps may be rea In this way, many sin-.
dily connected for multiple Also, by
using different control members, the contour of rim m may be such as to vary the amount of the period of pre-injection relatively to the main injection so as to conform any engine.
In the well known way,
be regulated by turning pis to the load condition of the fuel supply may also ton p with its control member It to any circumferential position desired by means of the rack 11/ and pinion a.
In the example'shown in over pro-injection extends the drawing, however, the entire controlling or governing range of the pump in the same positions of the piston b the inner end face of the -injection, and that part of the end of the pre-injecbeginning of the pre the rim mdetermining tion, are parallel to each to the axis of the piston.
It is obvious that the ecause both the rim of piston controlling the other in planes normal control member 7c need' not be mounted on or form an integral part of the piston, as shown in be separate ently thereof.
What is claimed is:.
a piston in said fuel 0 a storage chamber, and a con the drawing, but may d therefrom and operated independfor internal combushaving a return port,
trol member on the piston constructed and adapted to connect the port and the storage chamber to the fuel chamber.
engines, a fuel chamber 2. In an injection pump for internal combustion having a return port, a
with the fuel chamber and having one end of such shape that the fuel chamber is put into communication with the port at a predetermined point at the stroke of the piston.
3. In an injection pump for internal combustion engines, a fuel chamber having a supply port, a piston, the pump containing a storage chamber, and a control member constructed and arranged to automatically connect the storage chamber to the fuel chamber when the port is closed at a point in the pressure stroke of said piston subsequent to the beginning of the affective discharge stroke thereof.
4. In an injection pump for internal combustion engines, a fuel chamber having a supply port a piston, the pump containing a pressure storage chamber having an adjustable volume, and a positively actuated control member constructed and arranged to automatically connect the storage chamber to the fuel chamber when the port is closed at a predetermined point in the pressure stroke of said piston.
5. In an injection pump for internal combustion engines, a fuel chamber, a piston, the pump having a storage chamber connected thereto, and a control member constructed and arranged to automatically close the connection between the storage chamber and the fuel chamber during the initial portion of the pressure stroke of said piston and to open the connection thereafter, the storage chamber havinga variable volume with an ad- J'ustable maximum value.
6. In an injection pump for internal combustion engines, a fuel chamber having a return port, and an integral piston and control member, said pump containing a storage chamber, and said control member being constructed and arranged to connect the storage chamber to the fuel chamber when the port is closed at a predetermined point in the pressure stroke of said piston.
7. A fuel pump for supplying fuel to internal combustion engines including means for interrupting the delivery of fuel from said pump after a part of the injection for a given cycle has been effected, said means including a pressure storage chamber having a passage connected with said pump, automatic means to close said passage during the early portion of the delivery period of said pump, automatic means to open said passage, whereby said interruption is effected until the pressure in said chamber is raised to the pump discharge pressure.
8. In an injection pump for internal combustion engines, a pump chamber, a reciprocating pumping member, an outlet pipe leading to an injection nozzle, and a storage chamber, control means automatically connecting the pump chamber and the storage chamber after a part of the effective delivery stroke of said pumping member, so that the eilective delivery to the injection nozzle is interrupted until the storage chamber is filled up to a pressure overcoming the resistances in the outlet pipe and nozzle, and means for releasing the pressure in the storage chamber when the effective delivery stroke has ceased.
9. In an injection pump for internal combustion engines having a pump chamber, a reciprocating pumping member, an inlet, an outlet valve normally under closing pressure, and a storage chamber, a control means carried by the pumping member automatically connecting the pump chamber and the storage chamber constructed and arranged so that the effective delivery through the outlet valve is initiated and then interrupted until the storage chamber is filled up to a pressure overcoming the pressure on the outlet valve, and a return port connected to said inlet for releasing the pressure in the storage chamber when the effective delivery stroke has ceased.
FRIEDRICH WILHELM STOCKMEYIER.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1993759X | 1932-06-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
US1993759A true US1993759A (en) | 1935-03-12 |
Family
ID=7917760
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US672535A Expired - Lifetime US1993759A (en) | 1932-06-21 | 1933-05-24 | Fuel injection pump |
Country Status (1)
Country | Link |
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US (1) | US1993759A (en) |
Cited By (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2430801A (en) * | 1942-09-16 | 1947-11-11 | Bendix Aviat Corp | Fuel injection apparatus |
US2430895A (en) * | 1942-12-08 | 1947-11-18 | Richard L Tuve | Continuous water analyzer |
US2513883A (en) * | 1947-01-15 | 1950-07-04 | Ingersoll Rand Co | Fuel pump for engines |
US2573344A (en) * | 1946-09-13 | 1951-10-30 | Everett P Larsh | Fuel injector |
US2575955A (en) * | 1947-07-10 | 1951-11-20 | James W Hatch | Fuel injection pump |
US2599018A (en) * | 1946-07-26 | 1952-06-03 | Gardiner M Rogers | Fuel injector |
US2606538A (en) * | 1946-12-03 | 1952-08-12 | Texas Co | Fuel injection internal-combustion engine |
US2727466A (en) * | 1950-03-01 | 1955-12-20 | Technicon International Ltd | Pump |
US2804825A (en) * | 1950-11-17 | 1957-09-03 | British Internal Combust Eng | Delivery valves for fuel injection pumps |
US2871796A (en) * | 1955-08-02 | 1959-02-03 | Allis Chalmers Mfg Co | Pilot injection pump |
US2890657A (en) * | 1955-08-12 | 1959-06-16 | Gen Motors Corp | Unit injector pump with pilot injection |
US2975776A (en) * | 1958-03-20 | 1961-03-21 | Cav Ltd | Liquid fuel pumps of rinternal combustion engines |
US3677256A (en) * | 1969-11-20 | 1972-07-18 | Peugeot | Fuel injection device for an internal combustion engine |
US3965876A (en) * | 1973-12-13 | 1976-06-29 | Sigma Diesel | Fuel injection pumps for internal combustion engines |
US3990413A (en) * | 1973-02-28 | 1976-11-09 | Franz Pischinger | Fuel injection system for single or multiple cylinder internal combustion engines |
US4367706A (en) * | 1978-08-24 | 1983-01-11 | Daimler-Benz A.G. | Fuel injection pump for air-compressing fuel injected internal combustion engines |
US4526150A (en) * | 1983-03-05 | 1985-07-02 | Robert Bosch Gmbh | Fuel injection apparatus for internal combustion engines |
US4526149A (en) * | 1983-03-05 | 1985-07-02 | Robert Bosch Gmbh | Fuel injection apparatus for internal combustion engines |
US4591321A (en) * | 1984-03-29 | 1986-05-27 | Societe D'etudes De Machines Thermiques S.E.M.T., S.A. | Method and apparatus for removing pressure peaks and damping hydraulic pressure waves and peaks from pressure variations in the feed ducts of a hydraulic pump and a pump for implementing the method |
US6004117A (en) * | 1998-05-29 | 1999-12-21 | Qualicon Inc. | Displacement pump |
-
1933
- 1933-05-24 US US672535A patent/US1993759A/en not_active Expired - Lifetime
Cited By (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2430801A (en) * | 1942-09-16 | 1947-11-11 | Bendix Aviat Corp | Fuel injection apparatus |
US2430895A (en) * | 1942-12-08 | 1947-11-18 | Richard L Tuve | Continuous water analyzer |
US2599018A (en) * | 1946-07-26 | 1952-06-03 | Gardiner M Rogers | Fuel injector |
US2573344A (en) * | 1946-09-13 | 1951-10-30 | Everett P Larsh | Fuel injector |
US2606538A (en) * | 1946-12-03 | 1952-08-12 | Texas Co | Fuel injection internal-combustion engine |
US2513883A (en) * | 1947-01-15 | 1950-07-04 | Ingersoll Rand Co | Fuel pump for engines |
US2575955A (en) * | 1947-07-10 | 1951-11-20 | James W Hatch | Fuel injection pump |
US2727466A (en) * | 1950-03-01 | 1955-12-20 | Technicon International Ltd | Pump |
US2804825A (en) * | 1950-11-17 | 1957-09-03 | British Internal Combust Eng | Delivery valves for fuel injection pumps |
US2871796A (en) * | 1955-08-02 | 1959-02-03 | Allis Chalmers Mfg Co | Pilot injection pump |
US2890657A (en) * | 1955-08-12 | 1959-06-16 | Gen Motors Corp | Unit injector pump with pilot injection |
US2975776A (en) * | 1958-03-20 | 1961-03-21 | Cav Ltd | Liquid fuel pumps of rinternal combustion engines |
US3677256A (en) * | 1969-11-20 | 1972-07-18 | Peugeot | Fuel injection device for an internal combustion engine |
US3990413A (en) * | 1973-02-28 | 1976-11-09 | Franz Pischinger | Fuel injection system for single or multiple cylinder internal combustion engines |
US3965876A (en) * | 1973-12-13 | 1976-06-29 | Sigma Diesel | Fuel injection pumps for internal combustion engines |
US4367706A (en) * | 1978-08-24 | 1983-01-11 | Daimler-Benz A.G. | Fuel injection pump for air-compressing fuel injected internal combustion engines |
US4526150A (en) * | 1983-03-05 | 1985-07-02 | Robert Bosch Gmbh | Fuel injection apparatus for internal combustion engines |
US4526149A (en) * | 1983-03-05 | 1985-07-02 | Robert Bosch Gmbh | Fuel injection apparatus for internal combustion engines |
US4591321A (en) * | 1984-03-29 | 1986-05-27 | Societe D'etudes De Machines Thermiques S.E.M.T., S.A. | Method and apparatus for removing pressure peaks and damping hydraulic pressure waves and peaks from pressure variations in the feed ducts of a hydraulic pump and a pump for implementing the method |
US6004117A (en) * | 1998-05-29 | 1999-12-21 | Qualicon Inc. | Displacement pump |
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