US2011166A - Fuel injection pump for internal combustion engines - Google Patents
Fuel injection pump for internal combustion engines Download PDFInfo
- Publication number
- US2011166A US2011166A US628473A US62847332A US2011166A US 2011166 A US2011166 A US 2011166A US 628473 A US628473 A US 628473A US 62847332 A US62847332 A US 62847332A US 2011166 A US2011166 A US 2011166A
- Authority
- US
- United States
- Prior art keywords
- accumulator piston
- fuel
- spring
- plunger
- chamber
- 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
Links
Images
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
- F02M59/022—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 having an accumulator storing pressurised fuel during pumping stroke of the piston for subsequent delivery to the injector
Definitions
- Patent I I ug. 13, 1935 FUEL INJECTION PUMP FOR INTERNAL COMBUSTION ENGINES Hans Steiner, Winterthur, Switzerland, assignor to the firm of Sulzer Freres Societe Anonyme Winterthur, Switzerland Application August 12, 1932, Serial No. 628,473 In Switzerland August 18, 1931 Claims. (61.103-154)
- This invention relates to fuel injection pumps for solid or airless injection of fuel in internal combustion engines and of the kind in which the fuel is injected by a fuel accumulator or storage piston forming part of the pump.
- the accumulator piston is loaded not only by a metallic spring but also by a hydraulic spring.
- the dimensions and therefore the mass of the metallic spring can be reduced whereby the oscillations of the spring and therefore of the accumulator piston during the injection stroke are reduced to a minimum.
- the metallic spring is immersed in the loading liquid, whereby this liquid tends to damp oscillations of the metallic spring.
- fuel injection pump ac cording to the invention is illustrated by way of example in the accompanying drawin and comprises a cylinder a, and a pump plunger b whereby fuel is drawn from a supply pipe 0 and is delivered during the injection stroke through an injection conduit 11, as hereinafter described.
- the pump plunger b is moved on its compression stroke by a driving cam 12 and is returned on its suction stroke by means of a spring as shown.
- An accumulator piston e which cooperates with the plunger b is loaded by a metallic spring 0 and in addition by a compressible liquid q under pressure within a chamber p, the spring obeing immersed in the liquid q.
- the accumulator piston is loaded solely by a metallic spring so that the spring has necessarily to be of large dimensions in order to produce the requisite fuelpressure.
- the loading spring being of large mass, tends to oscillate and to transmit such oscillation to the accumulator piston.
- the metallic spring 0 being immersed in the loading liquid q results in the 3 oscillations of the metallic spring being damped.
- a fuel injection pump for internal combustion engines a cylinder having a working chamber, a plunger reciprocable in said cylinder, a fuel I inlet to the working chamber, a fuel outlet from the working chamber, the opening and closing of said inlet and outlet being controlled by said plunger, an accumulator piston also reciprocable in said cylinder, a closed fluid chamber having a volume many times as great as the volumetric displacement of the accumulator piston, said chamber being substantially completely filled with a liquid, means for causing a displacement of liquid in said chamber on outward movement of the accumulator piston, whereby said liquid forms an hydraulic spring for loading the accumulator piston, and a metallic spring also loading said accumulator piston, both the metallic spring and v the hydraulic spring acting upon said accumulator piston during expulsion of fuel from the working chamber to impart a motivating force tov said piston.
- a plunger reciprocable in said cylinder, a fuel inlet to the working chamber, a fuel outlet said plunger, an accumulator piston also reciprocable in said cylinder, a closed fluid chamber having a volume many times as great as the volumetric displacement of the accumulator piston, said chamber being substantially completely filled with a liquid, means for causing a displacement of liquid in said chamber on outward movement of the accumulator piston, whereby said liquid forms an hydraulic spring for loading the accumulator piston, and a metallic spring located in said fluid chamber also loading said accumulator piston, both the metallic spring and the hydraulic spring acting upon said accumulator piston during expulsion of fuel from the working chamber to impart a motivating force to said piston.
- a cylinder having a working chamber, a plunger reciprocable in said cylinder, a fuel inlet, a fuel outlet, said plunger having a passage therethrough through which fuel may pass from the fuel inlet to the working chamber when the plunger is in one position, and from the working chamber to the fuel outlet when the plunger is in another position, an accumulator piston also reciprocable in said cylinder, a metallic spring for partially loading said accumulator piston, a closed fluid chamber having a volume many times as great as the volumetric displacement of the accumulator piston, said chamber being substantially completely filled with a liquid, and means for causing a displacement of liquid in said chamber on an outward movement of the accumulator piston, whereby said liquid forms an hydraulic spring for loading the accumulator piston, said metallic spring and said hydraulic spring both exerting a motivating force on the accumulator piston during expulsion of the fuel from the working chamber through the fuel outlet.
- a fuel injection pump a cylinder having a working chamber, a plunger reciprocable in said cylinder, a fuel inlet to the working chamber, an accumulator piston responsive to pressure in said working chamber, a closed fluid chamber having a volume many times as great as the volumetric displacement'of the accumulator piston, said chamber being substantially completely filled with a liquid, said accumulator piston causing a displacement of liquid in said chamber on movement of the accumulator piston under inof fuel through the fuel inlet and fuel outlet being controlled by said plunger, an accumulator piston responsiveto pressure in said working chamber, a closed fluid chamber having a volume many times as great as the volumetric displacement of the accumulator piston, said chamber being substantially completely filled with a liquid, said accumulator piston causinga displacement of liquid in said chamber on movement of the accumulator piston under influence of pressure in the working chamber, whereby said liquid forms an hydraulic spring for loading the accumulator piston, and a metallic spring also loading said accumulator piston, both the metallic spring and the hydraulic spring exerting their force upon said
Description
Aug. 13, 1935. STElNER 2,011,166
' FUEL INJECTION PUMP FOR INTERNAL COMBUSTION ENGINES Filed Aug. 12, 19:52
Patent I I ug. 13, 1935 FUEL INJECTION PUMP FOR INTERNAL COMBUSTION ENGINES Hans Steiner, Winterthur, Switzerland, assignor to the firm of Sulzer Freres Societe Anonyme Winterthur, Switzerland Application August 12, 1932, Serial No. 628,473 In Switzerland August 18, 1931 Claims. (61.103-154) This invention relates to fuel injection pumps for solid or airless injection of fuel in internal combustion engines and of the kind in which the fuel is injected by a fuel accumulator or storage piston forming part of the pump.
This application is a companion ofapplications Serial Nos. 628,471 and 628,472 by the same applicant.
In a pump of this type when the accumulator V or storage piston is loaded solely by a metallic spring and the admission to and delivery of fuel from the pump is controlled by a pump plunger cooperating with the accumulator piston, the
accumulator piston tends to oscillate to and from the pump plunger when the fuel injection port is uncovered, so that during each movement of the i accumulator piston away from the pump piston the pressurewithin the pump between the accumulator piston and the fuel injection port is momentarily reduced. This tends to result in a jerky back-flow of air or combustion gases from the combustion chamber of the engine into the pump and the present invention has for its object to overcome this disadvantage.
According to the present invention the accumulator piston is loaded not only by a metallic spring but also by a hydraulic spring. In this Waythe dimensions and therefore the mass of the metallic spring can be reduced whereby the oscillations of the spring and therefore of the accumulator piston during the injection stroke are reduced to a minimum.
Preferably the metallic spring is immersed in the loading liquid, whereby this liquid tends to damp oscillations of the metallic spring.
One construction of fuel injection pump ac cording to the invention is illustrated by way of example in the accompanying drawin and comprises a cylinder a, and a pump plunger b whereby fuel is drawn from a supply pipe 0 and is delivered during the injection stroke through an injection conduit 11, as hereinafter described.
The pump plunger b is moved on its compression stroke by a driving cam 12 and is returned on its suction stroke by means of a spring as shown. An accumulator piston e which cooperates with the plunger b is loaded by a metallic spring 0 and in addition by a compressible liquid q under pressure within a chamber p, the spring obeing immersed in the liquid q.
When they plunger 1; arrives at the end of its suction stroke a recess '1' in the plunger registers with a recess is within the cylinder a so that .fuel flows from the supply pipe 0 through an axial bore g in theplunger b and into the working chamber of the pump. As the plunger 17 moves forward on its compression stroke communication between the recess 2' and the recess is first cut off, whereupon the plunger b commences to apply pressure to the fuel within the working chamber h so that the accumulator piston e is moved outwards to compress the metallic spring 0 and also the loading liquid q. Towards the end of the compression stroke of the plunger 11 the recess 1' upon the accumulator piston e moves towards the plunger b under the action of the loading spring 0 and liquid q. In this Way the fuel within the working chamber h is injected through the inje'ctionnozzle f.
In known constructions the accumulator piston is loaded solely by a metallic spring so that the spring has necessarily to be of large dimensions in order to produce the requisite fuelpressure. When therefore the fuel injection port is opened the loading spring, being of large mass, tends to oscillate and to transmit such oscillation to the accumulator piston. In a pump embodying the present invention, however, the dimensions of .registers with the fuel injection conduit d where the metallic spring can be reduced since the force of this spring is supplemented by the loading liquid. Oscillations of the spring and therefore of the accumulator piston are in this way reduced. In addition the metallic spring 0 being immersed in the loading liquid q results in the 3 oscillations of the metallic spring being damped.
I claim: 1. In afuel injection pump for internal combustion engines, a cylinder having a working chamber, a plunger reciprocable in said cylinder, a fuel I inlet to the working chamber, a fuel outlet from the working chamber, the opening and closing of said inlet and outlet being controlled by said plunger, an accumulator piston also reciprocable in said cylinder, a closed fluid chamber having a volume many times as great as the volumetric displacement of the accumulator piston, said chamber being substantially completely filled with a liquid, means for causing a displacement of liquid in said chamber on outward movement of the accumulator piston, whereby said liquid forms an hydraulic spring for loading the accumulator piston, and a metallic spring also loading said accumulator piston, both the metallic spring and v the hydraulic spring acting upon said accumulator piston during expulsion of fuel from the working chamber to impart a motivating force tov said piston.
chamber, a plunger reciprocable in said cylinder, a fuel inlet to the working chamber, a fuel outlet said plunger, an accumulator piston also reciprocable in said cylinder, a closed fluid chamber having a volume many times as great as the volumetric displacement of the accumulator piston, said chamber being substantially completely filled with a liquid, means for causing a displacement of liquid in said chamber on outward movement of the accumulator piston, whereby said liquid forms an hydraulic spring for loading the accumulator piston, and a metallic spring located in said fluid chamber also loading said accumulator piston, both the metallic spring and the hydraulic spring acting upon said accumulator piston during expulsion of fuel from the working chamber to impart a motivating force to said piston.
3. In a fuel injection pump for internal combustion engines, a cylinder having a working chamber, a plunger reciprocable in said cylinder, a fuel inlet, a fuel outlet, said plunger having a passage therethrough through which fuel may pass from the fuel inlet to the working chamber when the plunger is in one position, and from the working chamber to the fuel outlet when the plunger is in another position, an accumulator piston also reciprocable in said cylinder, a metallic spring for partially loading said accumulator piston, a closed fluid chamber having a volume many times as great as the volumetric displacement of the accumulator piston, said chamber being substantially completely filled with a liquid, and means for causing a displacement of liquid in said chamber on an outward movement of the accumulator piston, whereby said liquid forms an hydraulic spring for loading the accumulator piston, said metallic spring and said hydraulic spring both exerting a motivating force on the accumulator piston during expulsion of the fuel from the working chamber through the fuel outlet.
- 4. a fuel injection pump, a cylinder having a working chamber, a plunger reciprocable in said cylinder, a fuel inlet to the working chamber, an accumulator piston responsive to pressure in said working chamber, a closed fluid chamber having a volume many times as great as the volumetric displacement'of the accumulator piston, said chamber being substantially completely filled with a liquid, said accumulator piston causing a displacement of liquid in said chamber on movement of the accumulator piston under inof fuel through the fuel inlet and fuel outlet being controlled by said plunger, an accumulator piston responsiveto pressure in said working chamber, a closed fluid chamber having a volume many times as great as the volumetric displacement of the accumulator piston, said chamber being substantially completely filled with a liquid, said accumulator piston causinga displacement of liquid in said chamber on movement of the accumulator piston under influence of pressure in the working chamber, whereby said liquid forms an hydraulic spring for loading the accumulator piston, and a metallic spring also loading said accumulator piston, both the metallic spring and the hydraulic spring exerting their force upon saidaccumulator piston during expulsion of fuel from the working chamber.
HANS STEINER.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH2011166X | 1931-08-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
US2011166A true US2011166A (en) | 1935-08-13 |
Family
ID=4567120
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US628473A Expired - Lifetime US2011166A (en) | 1931-08-18 | 1932-08-12 | Fuel injection pump for internal combustion engines |
Country Status (1)
Country | Link |
---|---|
US (1) | US2011166A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2415618A (en) * | 1945-05-21 | 1947-02-11 | William S West | Pump |
US2565516A (en) * | 1946-08-16 | 1951-08-28 | Nandor F Patus | Governor controlled injection means for internal-combustion engines |
US2720842A (en) * | 1949-06-07 | 1955-10-18 | Lucas Ltd Joseph | Pumps |
US3216359A (en) * | 1963-04-22 | 1965-11-09 | Gen Motors Corp | Fuel injection pump with pneumatic damper |
US3237568A (en) * | 1963-04-19 | 1966-03-01 | Gen Motors Corp | Fuel injection pump with pneumatic damper |
US4050856A (en) * | 1974-03-22 | 1977-09-27 | Diesel Kiki Co., Ltd. | Dash pot arrangement for distribution-type fuel injection pump cut off barrel |
US20140050597A1 (en) * | 2011-01-31 | 2014-02-20 | Michael Absmeier | Pump Unit for a High-Pressure Pump |
-
1932
- 1932-08-12 US US628473A patent/US2011166A/en not_active Expired - Lifetime
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2415618A (en) * | 1945-05-21 | 1947-02-11 | William S West | Pump |
US2565516A (en) * | 1946-08-16 | 1951-08-28 | Nandor F Patus | Governor controlled injection means for internal-combustion engines |
US2720842A (en) * | 1949-06-07 | 1955-10-18 | Lucas Ltd Joseph | Pumps |
US3237568A (en) * | 1963-04-19 | 1966-03-01 | Gen Motors Corp | Fuel injection pump with pneumatic damper |
US3216359A (en) * | 1963-04-22 | 1965-11-09 | Gen Motors Corp | Fuel injection pump with pneumatic damper |
US4050856A (en) * | 1974-03-22 | 1977-09-27 | Diesel Kiki Co., Ltd. | Dash pot arrangement for distribution-type fuel injection pump cut off barrel |
US20140050597A1 (en) * | 2011-01-31 | 2014-02-20 | Michael Absmeier | Pump Unit for a High-Pressure Pump |
US10047740B2 (en) * | 2011-01-31 | 2018-08-14 | Continental Automotive Gmbh | Pump unit for a high-pressure pump |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4167168A (en) | Fuel injection apparatus | |
US2011166A (en) | Fuel injection pump for internal combustion engines | |
US2011165A (en) | Fuel injection pump for internal combustion engines | |
GB861754A (en) | Improvements in reciprocating liquid pumps, and in particular in fuel injection pumps | |
US3123061A (en) | figure | |
GB1325885A (en) | Fuel injecting device for an internal combustion engine | |
US1958948A (en) | Fuel pump | |
US2173811A (en) | Method and apparatus for operating fuel injection devices in internal combustion engines | |
GB442839A (en) | Improvements in or relating to fuel injection pumps | |
US1897290A (en) | Fuel pump for diesel engines | |
US1871872A (en) | Oil pump | |
ES304315A1 (en) | An injection device for a liquid fuel in an internal combustión engine. (Machine-translation by Google Translate, not legally binding) | |
GB1150392A (en) | Improvements in Liquid Fuel Injection Devices for Free Piston Internal Combustion Engines | |
US2351414A (en) | Fuel injection pump | |
US1760387A (en) | Inertia pump for supplying gasoline to carburetors | |
ES405596A1 (en) | Fuel injection pump in an explosion engine. (Machine-translation by Google Translate, not legally binding) | |
GB1496147A (en) | Piston-type metering pumps | |
GB210886A (en) | Improvements in and relating to fuel-delivery pumps for internal combustion engines | |
GB1496650A (en) | Pistontype metering pumps | |
GB486740A (en) | Improvements in and relating to reciprocating liquid pressure pumps | |
GB661722A (en) | Improvements relating to pumps | |
JPS622294Y2 (en) | ||
GB218759A (en) | Improvements in reciprocating pumps | |
SU38563A1 (en) | A device for injecting fuel in internal combustion engines without compression engines | |
JPS622295Y2 (en) |