CA1071682A - Fuel pump for automotive vehicles - Google Patents
Fuel pump for automotive vehiclesInfo
- Publication number
- CA1071682A CA1071682A CA260,106A CA260106A CA1071682A CA 1071682 A CA1071682 A CA 1071682A CA 260106 A CA260106 A CA 260106A CA 1071682 A CA1071682 A CA 1071682A
- Authority
- CA
- Canada
- Prior art keywords
- carbon brushes
- commutator
- motor
- fuel pump
- fuel
- 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
Links
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
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/04—Feeding by means of driven pumps
- F02M37/08—Feeding by means of driven pumps electrically driven
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/0653—Units comprising pumps and their driving means the pump being electrically driven the motor being flooded
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Motor Or Generator Current Collectors (AREA)
Abstract
W. Gakenholz et al.
12-15-35 (Rev.) STAGGERED BRUSH ARRANGEMENT FOR FUEL PUMP MOTOR
ABSTRACT OF THE DISCLOSURE:
A fuel supply pump for use in the fuel supply of a fuel tank said fuel pump being of the type which is driven by a com-mutator motor of the type in which external power is applied to the commutator solely by means of carbon brushes. The carbon brushes of the motor are axially staggered by at least one brush width so that separate sliding paths are assigned to the carbon brushes on the common commutator segments. Each of the sliding paths is in contact with only a respective one of the carbon brushes.
12-15-35 (Rev.) STAGGERED BRUSH ARRANGEMENT FOR FUEL PUMP MOTOR
ABSTRACT OF THE DISCLOSURE:
A fuel supply pump for use in the fuel supply of a fuel tank said fuel pump being of the type which is driven by a com-mutator motor of the type in which external power is applied to the commutator solely by means of carbon brushes. The carbon brushes of the motor are axially staggered by at least one brush width so that separate sliding paths are assigned to the carbon brushes on the common commutator segments. Each of the sliding paths is in contact with only a respective one of the carbon brushes.
Description
~7~
. ~
BACKGROUND OF T~IE INVENTION:
.. . .. _ This invention relates to fuel pumps for autornotive vehicles comprising an impeller-type pump driven by a commutator motor with commutator segments and carbon brushes being submerged in the fuel as a unit.
~ arbon brushes for commutator motors contain in addition to carbon, and eventually graphite, a certain amount of metal, for example, copper, in order to achieve low junction resistance and therefore a low drop in voltage across the carbon brush.
When the commutator motor is used in a fuel pump it becomes obvious that the wear of the carbon brushes in conventional gasoline is considerably smaller than in unleaded gasoline, or gasoline of lead content. The lead tetraethyl contained in the gasoline effects a certain lubrication diminishing the wear of the carbon brushes.
In order to diminish the wear of the carbon brushes when the fuel pump is used in unleaded gasoline or gasoline poor of lead it is known to use abrasive carbon brushes of higher quality. Thoùgh these abrasive carbon brushes are more abrasion-proof, they also attack the commutator more, so that the life of the fuel pump is reduced thereby.
It is an object of the invention to develop a fuel pump of the type as ~entioned above in a way that even by the use of abrasive carbon brushes the life of the fuel pump is not reduced by premature wear.
SUMMARY OF THE INV~NTION-~ :
This is achieved according to the invention in thatthe carbon brushes are staggered and that to said carbon brushes separate sliding paths on the common commutator segments are provided. By the assignment of a separate ~
_2- ~ -. - : . .
7~;8'~
sliding path for each carbon brush in a commutator m~tor comprising two carbon brushes, the life of the commutator can already be doubled.
According to one embodiment it is provided tha~ the commutator is fo~ned as a cylinder commutator and in that the carbon brushes are staggered in axial direction on the axially aligned commutator segments. This axial displacement of the carbon brushes influences the si~e of the fuel pump only to a small extent and can therefore be neglected. Thereby the optimum relation between life and size is achieved, when the design is such that the two carbon brushes are directly ad~acent to each other in axial direction of the cylinder commutator and in that the com~utator segments in axial direction are extending on the sliding paths of the two carbon brushes.
The same good results can be achieved by an embodiment which is characterized in that the commutator is developed as a plane commutator and in that the carbon brushes are radially staggered and guided on concentric sliding paths of the radially aligned commutator segments.
BRIEF DESCRIPTION OF THE DRAWING:
The advantages of this invention will become more readily appreciated as the same becomes completely understood by reference to the following detailed description when taken in conjunction with the accompanying drawing wherein the single figure illustrates a sectional view of an embodiment.
The invention is now described in detail by way of a sectional view of an embodiment of a fuel pump the electro-motor of whirh is provided with a cylinder commutator having axially staggered carbon brushes.
' ~ . ''' ' ' ''` , ' ' `',. ' ;,' ~07~8Z
",~
DETAILED DESCRIPTION:
,, ~ ,, _ _ __ The motor shaft 10 supports the rotor plate 11 and the rotor winding 12 being connected to the commutator segments 21. Ihe co~mutator segments are insulatedly secured to the commutator supporting member 22. The commutator supporting member 22 is non-rotatably connected to the motor shaft 10~ The complete rotor comprising the commutator is located in a cylindrical motor casing 23 which also receives the stator with the poles 14 of permanent magnets being secured by rivets 15 to a magnet supporting plate 13 surrounding the rotor. On the side of the commutator the motor casing is closed by a portion 16 which is provided with a bearing recess 20 for the motor shaft 10 and OD which the discharge pipe 19 is formed. The closing portion 16 simultaneously forms the support for the carbon brushes 17 and 18 which in two chambers staggered 180 are in well-kno~n manner held to lie against the commutator segments by means of springs. As the sec~ion clearly shows the two carbon brushes are axially displaced so far that they have separate sliding paths on the axially aligned com~utator segments 21 extending over the two carbon brushes 17 and 18. Thereby, even the wear of the commutator segments 21 through the abrasive carbon brushes is diminished to one half which corresponds to a doubling of its life time.
On the side not facing the commutator, the motor shaft 10 is provided with a bearing disc 24 supporting on the cover 25~ In front of the cover 25 of the motor shaft is non-rotatably fitted with an impeller 26 which together with the chamber portion Z8 and the cover 25 forms a first pump chamber. In front of the chamber portion 28, _4_ ., - , ~ : . :
f~
the motor shaft 10 is non-rotatably fitted with a further impeller 26, whereby the chamber portion 28 and the intake portion form the pump chamber, Both pump chambers are series connected, It will be appreciated by those skilled in the art that the invention is not restricted to the embodiment shownO For example, individual sliding paths for the carbon brushes can be achieved by radial displacement of the carbon brushes also when a disc-shaped plane commutator with radially aligned commutator segments is used, said carbon brushes being concentrically located to each other and preferably directly adjoining each other.
-5~
. ~
BACKGROUND OF T~IE INVENTION:
.. . .. _ This invention relates to fuel pumps for autornotive vehicles comprising an impeller-type pump driven by a commutator motor with commutator segments and carbon brushes being submerged in the fuel as a unit.
~ arbon brushes for commutator motors contain in addition to carbon, and eventually graphite, a certain amount of metal, for example, copper, in order to achieve low junction resistance and therefore a low drop in voltage across the carbon brush.
When the commutator motor is used in a fuel pump it becomes obvious that the wear of the carbon brushes in conventional gasoline is considerably smaller than in unleaded gasoline, or gasoline of lead content. The lead tetraethyl contained in the gasoline effects a certain lubrication diminishing the wear of the carbon brushes.
In order to diminish the wear of the carbon brushes when the fuel pump is used in unleaded gasoline or gasoline poor of lead it is known to use abrasive carbon brushes of higher quality. Thoùgh these abrasive carbon brushes are more abrasion-proof, they also attack the commutator more, so that the life of the fuel pump is reduced thereby.
It is an object of the invention to develop a fuel pump of the type as ~entioned above in a way that even by the use of abrasive carbon brushes the life of the fuel pump is not reduced by premature wear.
SUMMARY OF THE INV~NTION-~ :
This is achieved according to the invention in thatthe carbon brushes are staggered and that to said carbon brushes separate sliding paths on the common commutator segments are provided. By the assignment of a separate ~
_2- ~ -. - : . .
7~;8'~
sliding path for each carbon brush in a commutator m~tor comprising two carbon brushes, the life of the commutator can already be doubled.
According to one embodiment it is provided tha~ the commutator is fo~ned as a cylinder commutator and in that the carbon brushes are staggered in axial direction on the axially aligned commutator segments. This axial displacement of the carbon brushes influences the si~e of the fuel pump only to a small extent and can therefore be neglected. Thereby the optimum relation between life and size is achieved, when the design is such that the two carbon brushes are directly ad~acent to each other in axial direction of the cylinder commutator and in that the com~utator segments in axial direction are extending on the sliding paths of the two carbon brushes.
The same good results can be achieved by an embodiment which is characterized in that the commutator is developed as a plane commutator and in that the carbon brushes are radially staggered and guided on concentric sliding paths of the radially aligned commutator segments.
BRIEF DESCRIPTION OF THE DRAWING:
The advantages of this invention will become more readily appreciated as the same becomes completely understood by reference to the following detailed description when taken in conjunction with the accompanying drawing wherein the single figure illustrates a sectional view of an embodiment.
The invention is now described in detail by way of a sectional view of an embodiment of a fuel pump the electro-motor of whirh is provided with a cylinder commutator having axially staggered carbon brushes.
' ~ . ''' ' ' ''` , ' ' `',. ' ;,' ~07~8Z
",~
DETAILED DESCRIPTION:
,, ~ ,, _ _ __ The motor shaft 10 supports the rotor plate 11 and the rotor winding 12 being connected to the commutator segments 21. Ihe co~mutator segments are insulatedly secured to the commutator supporting member 22. The commutator supporting member 22 is non-rotatably connected to the motor shaft 10~ The complete rotor comprising the commutator is located in a cylindrical motor casing 23 which also receives the stator with the poles 14 of permanent magnets being secured by rivets 15 to a magnet supporting plate 13 surrounding the rotor. On the side of the commutator the motor casing is closed by a portion 16 which is provided with a bearing recess 20 for the motor shaft 10 and OD which the discharge pipe 19 is formed. The closing portion 16 simultaneously forms the support for the carbon brushes 17 and 18 which in two chambers staggered 180 are in well-kno~n manner held to lie against the commutator segments by means of springs. As the sec~ion clearly shows the two carbon brushes are axially displaced so far that they have separate sliding paths on the axially aligned com~utator segments 21 extending over the two carbon brushes 17 and 18. Thereby, even the wear of the commutator segments 21 through the abrasive carbon brushes is diminished to one half which corresponds to a doubling of its life time.
On the side not facing the commutator, the motor shaft 10 is provided with a bearing disc 24 supporting on the cover 25~ In front of the cover 25 of the motor shaft is non-rotatably fitted with an impeller 26 which together with the chamber portion Z8 and the cover 25 forms a first pump chamber. In front of the chamber portion 28, _4_ ., - , ~ : . :
f~
the motor shaft 10 is non-rotatably fitted with a further impeller 26, whereby the chamber portion 28 and the intake portion form the pump chamber, Both pump chambers are series connected, It will be appreciated by those skilled in the art that the invention is not restricted to the embodiment shownO For example, individual sliding paths for the carbon brushes can be achieved by radial displacement of the carbon brushes also when a disc-shaped plane commutator with radially aligned commutator segments is used, said carbon brushes being concentrically located to each other and preferably directly adjoining each other.
-5~
Claims
12-15-35 (Rev.) THE EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLUSIVE
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A fuel supply pump for use in the fuel supply of a fuel tank said fuel pump being of the type which is driven by a com-mutator motor of the type in which external power is applied to the commutator solely by means of carbon brushes, wherein the carbon brushes of said motor are axially staggered by at least one brush width so that separate sliding paths are assigned to the carbon brushes on the common commutator segments and wherein each of said sliding paths is in contact with only a respective one of said carbon brushes.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2538689A DE2538689C3 (en) | 1975-08-30 | 1975-08-30 | Fuel feed pumps for motor vehicles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1071682A true CA1071682A (en) | 1980-02-12 |
Family
ID=5955244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA260,106A Expired CA1071682A (en) | 1975-08-30 | 1976-08-30 | Fuel pump for automotive vehicles |
Country Status (7)
| Country | Link |
|---|---|
| BR (1) | BR7605358A (en) |
| CA (1) | CA1071682A (en) |
| DE (1) | DE2538689C3 (en) |
| FR (1) | FR2322272A1 (en) |
| GB (1) | GB1503467A (en) |
| IT (1) | IT1067930B (en) |
| ZA (1) | ZA764628B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2741535A1 (en) * | 1977-09-15 | 1979-03-29 | Bosch Gmbh Robert | LIQUID PUMP, IN PARTICULAR FUEL FEED PUMP |
| KR100568296B1 (en) | 2004-03-24 | 2006-04-05 | 삼성전기주식회사 | Vibration motor with brushes with different contact trajectories |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE918277C (en) * | 1941-08-22 | 1954-09-23 | Siemens Ag | Arrangement of the slip rings attached to the commutator of small single armature converters |
| DE1092116B (en) * | 1953-04-25 | 1960-11-03 | Progress Verkauf G M B H Der F | Brush holder |
| GB834689A (en) * | 1957-06-03 | 1960-05-11 | Lucas Industries Ltd | Rotary fuel pumps |
-
1975
- 1975-08-30 DE DE2538689A patent/DE2538689C3/en not_active Expired
-
1976
- 1976-07-30 ZA ZA764628A patent/ZA764628B/en unknown
- 1976-08-13 FR FR7624749A patent/FR2322272A1/en active Granted
- 1976-08-16 BR BR7605358A patent/BR7605358A/en unknown
- 1976-08-24 IT IT26479/76A patent/IT1067930B/en active
- 1976-08-26 GB GB35573/76A patent/GB1503467A/en not_active Expired
- 1976-08-30 CA CA260,106A patent/CA1071682A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR2322272A1 (en) | 1977-03-25 |
| DE2538689C3 (en) | 1978-08-10 |
| IT1067930B (en) | 1985-03-21 |
| BR7605358A (en) | 1977-08-16 |
| ZA764628B (en) | 1977-07-27 |
| FR2322272B1 (en) | 1980-06-27 |
| DE2538689B2 (en) | 1977-12-15 |
| DE2538689A1 (en) | 1977-03-03 |
| GB1503467A (en) | 1978-03-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |