GB2134178A - In situ cleaning of i.c. engine fuel injection systems - Google Patents
In situ cleaning of i.c. engine fuel injection systems Download PDFInfo
- Publication number
- GB2134178A GB2134178A GB08301975A GB8301975A GB2134178A GB 2134178 A GB2134178 A GB 2134178A GB 08301975 A GB08301975 A GB 08301975A GB 8301975 A GB8301975 A GB 8301975A GB 2134178 A GB2134178 A GB 2134178A
- Authority
- GB
- United Kingdom
- Prior art keywords
- fuel
- fuel injection
- injection valve
- engine
- valve system
- 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.)
- Withdrawn
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 141
- 238000002347 injection Methods 0.000 title claims abstract description 63
- 239000007924 injection Substances 0.000 title claims abstract description 63
- 238000004140 cleaning Methods 0.000 title claims description 20
- 238000011065 in-situ storage Methods 0.000 title description 2
- 239000000203 mixture Substances 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims description 11
- 238000005086 pumping Methods 0.000 claims description 8
- 230000001276 controlling effect Effects 0.000 claims 14
- 238000001914 filtration Methods 0.000 claims 1
- 239000012530 fluid Substances 0.000 claims 1
- 230000001105 regulatory effect Effects 0.000 claims 1
- 239000002904 solvent Substances 0.000 abstract description 3
- 239000002828 fuel tank Substances 0.000 abstract 1
- 230000007306 turnover Effects 0.000 abstract 1
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical compound CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 description 1
- 241000969130 Atthis Species 0.000 description 1
- 210000000436 anus Anatomy 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
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
- F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
-
- 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
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/04—Cleaning of, preventing corrosion or erosion in, or preventing unwanted deposits in, combustion engines
-
- 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
- F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
- F02M65/007—Cleaning
- F02M65/008—Cleaning of injectors only
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
A cart 16 mounting a tank 48 containing a mixture of petrol and a solvent and mounting a pump 50 has a delivery line 62 connectible to the engine fuel injection system 12 after fuel delivery and return lines to the vehicle fuel tank have been disconnected and plugged. The engine is operated at idling speed on the mixture until the tank 48 and the fuel lines are emptied of the mixture. With the tank fuel lines reconnected each injector may be tested by collecting the output of each injector in turn over a predetermined period. <IMAGE>
Description
SPECIFICATION
Fuel injection cleaning-system and apparatus
The present invention relates generally to a cleaning device forthe fuel injection system of an engine, and in particularto a fuel injector cleanerforthe engine of an automotive vehicle.
Fuel injection valves in vehicle engines, particularly the front portion ofthe fuel injection valves, are apt graduallyto acquire an outerandinnerdeposit restricting the area ofthefuel passage ofthe injection valve. Resulting modification of the function of the injector valve is particularly harmful forthetype of injector valves which contain a reciprocatory sprayer needle unit and a solenoid for operating the same, since the fuel flow through the valve will vary with the areaofthefuel passage.Therestrictionsformedby the deposits completely defeat the primary purpose of fuel injection valves to provide a more accurate metering of the quantity offuel supplied to each of the cylinders of the engine durng the suction stroke of the engine and a better control of the fuellairweight relation in the combusted charge. Prior art methods and apparatus for deposit removal from a fuel injection valve, such as that shown in U.S. Pat. No.
4,082,565, have required removal of each fuel injection valve in orderto clean the valve. Although less costly than replacement ofthe injection valves by a new set of valves when the valves no longerwork properly, the labor cost of valve removal in itself is substantial.
Thus, the present invention has for a primary object to provide a satisfactory method forthe removal of deposits from the fuel injection valves of a vehicle engine without removal ofthevalves. Since correct proportionality offuel to air is extremely important to motor powerand efficiency in afuel injection engine, it would appearthat a need exists to provide a system for removing deposits from a fuel injection valve in a systematic and inexpensive manner. In such a man ner, thefuel injection valves could be cleaned as part ofthe normal maintenance schedule without an exhorbitant labor cost or expensive replacement of parts.Thus, it is another object of the present invention to provide an in situ cleaning apparatus than can be attached directly to the fuel lines ofthe vehicle to inexpensively and systematically clean deposits from the fuel injection valves.
According to the present invention there is provided apparatusfor cleaning the fuel injection valve system of a vehicle engine, said valve system including at least one fuel injection valve operably secured to and associated with said engine, means for supplying fuel to said at least one valve, means for controlling said at least one valve to feed fuel to said engine, and means for powering said controlling means, said apparatus comprising: meansforfeeding a solvent-fuel mixture into said fuel supplying means of said vehicle engine; meansforcontrolling said solvent-fuel mixture feeding means, including meansforoperating said fuel injection valves disposed in operable association with said vehicle engine; and means for operably associating said feeding means with saidvalvefuel supplying means and disabling said valve fuel supplying means to permit said feeding means to be the source of the fuel supplyforsaid at least one fuel injection valve.
Preferably the meansforfeeding a solvent-fuel mixture into said fuel supplying means of said vehicle engine comprises an outlet conduit, means for storing a supply of said solvent-fuel mixture, means for pumping said solventfuel-mixturefrom said storing means to said outlet conduit, and means for communicating said storing means with said pumping means and the means for controlling said solvent-fuel mixture feeding means comprises meansforoperat- ing said fuel injection valves disposed in operable association with said vehicle engine, manual switch means for determining the commencement or cessation of operation of said feeding means, and means for operably associating said valve operating means and said manual switch means with said powering means.
Another aspect of the invention provides a process of cleaning the fuel injection valve system of a vehicle engine, said valve system including at least one fuel injection valve operably secured to and associated with said engine, means for supplying fuel to said at least one valve, means for controlling said at least one valve to feed fuel to said engine, and means for powering said controlling means, utilizing a cleaning apparatus including meansforfeeding a solvent-fuel mixture and meansforcontrolling said feeding means and said fuel injection valve system, said process comprising the steps of: disconnecting said fuel supply means from said valve system; disconnecting said vehicle fuel injection valve system controlling means from said powering means; operably connecting said feeding means of said cleaning apparatus to said fuel injection valve system; operably connecting said apparatus fuel injection valve system controlling meansto said fuel injection valve system; commencing operation of said feeding means and said appar anus fuel injection valve system controlling means; and commencing the operation of vehicle engine.
The invention will be further described byway of example, with reference to the accompanying drawings, wherein:
Figure lisa elevated perspective view of a vehicle having and engine with a fuel injection system to which an apparatus of the present invention is operably attached; Figure 2 is a schematic view of the fuel injection system ofthevehicle of Figure 1;
Figure 3 is an elevated front view of an apparatus of the present invention as mounted on a movable cart;
Figure 4 is a view similar to Figure 3 of an alternative embodimentofthe present invention;
Referring to Figure 1, a vehicle 10 is shown having a fuel injection system 12 included and operably associated with an engine 14. A cart 16 is disposed adjacent the vehicle 10 upon which the control and pumping apparatus 15 ofthe present invention is disposed, as will be described hereafter. The fuel injection system 12, as illustrated schematically in
Figure 2, comprises a gas tank 18 from which a fuel feed pipe 20 communicates the gastankwith a fuel pump 22. The fuel pump 22 is controlled by a fuel pump relay mechanism 24 usually found within the passenger compartment 26 of the vehicle 10. The fuel
pump 22 communicates with a pressure regulator 28
via fuel line 30. Fuel feed pipe 32 feeds fuel into the
engine compartment 34 ofthe vehicle 10. Fuel feel
feed pipe 32 communicates the fuel with a fuel filter 36
which in turn communicates on its opposite side via
fuel pipe 38 with a distribution fuel pipe 40.The
distribution pipe 40 communicates fuel to a series of fuel injectors 42 mounted on the engine 14. Each fuel injectorcommunicates with one cylinder ofthe engine 14. Excess fuel is returned to the gas tank 18 via fuel
return pipe 44 connected to the distribution fuel pipe 40 bya pressure regulator46.
The apparatus 15 used for cleaning the fuel injection system 12, as illustrated schematically in Figure 3, is mounted on a movable cart 16 (Figure 1). A solvent tank 48 mounted on the cart and communicates via fuel line 49 with an electric fuel pump 50 also mounted on the cart. The electric fuel pump communicates with a fuel filter 52 via fuel line 54. The downstream side of the fuel filter 52 has a fuel line 56 which communicates with a pressure regulator 58 and pressure gauge 60.
The downstream side ofthe pressure regulator and pressure gauge communicates with a fuel line 62 which can be operably associated with the fuel injection system 12 of the vehicle 10 as will be described later.
The cleaning apparatus 15 is comprised of two parts, a fuel injection cleaning supply system 64 and a control mechanism 66 forthe supply system 64, both
mounted on the cart 16. The electric fuel pump 54 is
controlled by a pump switch 68 which is mounted in
series with a fuse 70 to the positive terminal 72 ofthe
car battery 74 via line 75. Switch 68 and fuse 70 are
also mounted in parallel with a ground line 76
between the negative battery terminal 77 and the fuel
pump. Also in parallel with the pump switch 68 are two
timers, a 10-minute pump timer 78 and a precision
1-minute injection timer 80.The injection timer may
also be a 10-minutetimerforconvenience as a 10-minute test Precision ofthe injection timer 80 is
needed so thatthe technician can be positive that the
injector is clean (measuring the exact amount offlow through the injector). The injection timer 80 is
mounted in seriesthrough a dropping resistor 82 with the positive fuel injectorcontrolsystemterminal 84 via line 85. A return ground line 86 from the negative fuel injector control system terminal 88 is connected with the return ground line 76 from the battery74to the fuel pump 54. A conventional burette (not shown)
is also included in the cartto be used for ancillary volumetricfuel injectortesting as will be described
later.
The service procedure for cleaning the fuel injectors with the apparatus ofthe present invention involves
an initial step of preparing the fuel injector cleaner
mixture. One can of fuel injector cleaner (16 ounces or
1 pint size), which comprises aromatic petroleum
distillate and butyl cellosolve, is poured into the solventtank48. Two pints of gasoline are poured into the solventtank48 using the empty can of solventfor
measuring and the solution is stirred. The operator
then disconnects the fuel return line 44 (Figure 2) from
association with the gas tank 18 and plugs the return
line 44 with an appropriate stop. The fuel pump relay
mechanism 24 is then disabled and the fuel filter hose
38 is disconnected just above the fuel filter 36 (Figure
2).The fuel feed hose 62 from the cart 16 is then
connected to thefuel pipe 38 to operablyassociatethe cartfuel supply system 64 with the fuel injection system 12 of the vehicle 10. The control mechanism 66
is then connected to the vehicle electrical system by connecting lines 85 and 86 tothefuel injector control system terminals and lines 75 and 76 tothe battery 74.
Atthis stage the cleaning operation is setto be commenced. The fuel pump swItch 68 is turnedto the ON position. The vehicle engine is started and the operator should checkfor leaks in eitherthe-apparatus system orthe vehicle fuel system atthistime.The engine idle speed is set at 1800 rpm. The engine is run at idle until the cleanertank48 is empty. Then the pump switch 68 is turned to the OFF position. The engine 14continues idling until the speed drops or fluctuates, indicating that the fuel filter and supply line are emptied of cleaner mixture. At this pointthe engine is shut off and the cleaning apparatus is disconnected. The fuel return line plug is removed and allowed to drain.Return pipe 44 is then reinstalled and the fuel hose 38 is reinstalled on thefuel filter 36. The fuel pump relay 24 is also connected. The engine is started and the vehicle fuel system is checked again for leaks.
The apparatus 15 of the present invention also has an additional capabilitywhich may be provided as an added step to be used with the above-described method just subsequent to the cleaning procedure for the fuel injectors or as an entirely separate use of the apparatus 15. The added capability comprises running a volumetrictest ofthe fuel injection system 12 by disconnecting the fuel injectors one byone after operably associating the cart system 64 with the fuel injection system 12 of the vehicle 10, measuring outa fixed amount of raw gas into the cleaner tank, running the engine such thatthe gas sprays out of the one nozzle into a burette, measuring the amount of liquid in the burette, and repeating thetestfor each nozzle.
Multiplying the amount in the burette by 6 should give the original amount of raw gas and permit a fairly good estimate as to the amount offuel going through each tested nozzle proportionate to the amountoffuel supplied to the nozzles.
Referring to Figure 4, an alternative embodiment of the fuel supply system 64 and control mechanism 66 on the cart 16 is illustrated. All ofthe components of the fuel supply system 64 are identical.The control mechanism 66, however, is altered using a 20 amp relay 90 in series with the fuse 70 instead of the pump switch 68. A 110 volt DC timer 92 is setacross one set ofterminals ofthe relay 90to activate the relay 90 to start and stopthefuel supply system 64. A dropping resistor 82 is connected in parallel with thetimer92 to the relay 90. All other aspects of the control mechanism 66 arethe same asthe priordescribedembodi- ment. When the timer 92 is set, the fuel pump will feed the solvent gas mixture into the fuel injection system and the fuel injector system will be operational forthe amountoftimethatfuel is supplied. Thus the apparatus 15 can be left in operation and will shut itself off when the cleaning procedure has been performed.
The above two embodiments may also be accom plishedwith a manual pump switch mechanism in place ofthetimers so that an operator may monitor the operation and time the operation himself in whatever manner is desired. A combinaton of both manual and automatic operations may also be readily accomplished within the control system 66.
While it will be apparent that the preferred embodi ments of the invention disclosed are well calculated to fulfil the objects above stated, it will be appreciated thatthe invention is susceptible to modification, variation and change without departing from the spirit ofthe invention herein described, orthe scope of the subjoined claims.
Claims (17)
1. Apparatus for cleaning the fuel injection valve system of a vehicle engine, said valve system including atleastonefuel injection valve operably secured to and associated with said engine, means for supplying fuel to said at least one valve, means for controlling said atleastonevalvetofeed fuel to said engine, and means for powering said controlling means, said apparatus comprising: meansforfeeding a solvent-fuel mixture into said fuel supplying means of said vehicle engine; meansforcontrolling said solvent-fuel mixture feeding means, including means for operating said fuel injection valves disposed in operable association with said vehicle engine; and means for operably associating said feeding means with saidvalvefuel supplying meansanddisabling said valve fuel supplying means to permit said feeding means to be the source ofthefuel supplyforsaid at least one fuel injection valve.
2. Apparatus according to claim 1, wherein the meansforfeeding a solvent-fuel mixture into said fuel supplying means of said vehicle engine, comprises an outletconduit, means for storing a supply of said solvent-fuel mixture, means for pumping said solventfuel mixturefrom said storing means to said outlet conduit, and means for communicating said storing means with said pumping means.
3. Apparatus in accordancewith claim 2or3, wherein said feeding means further comprises means for regulating the pressure of said mixture downstream of said pumping means.
4. Apparatus inaccordancewith claim 2or3, wherein said feeding means further comprises a pressure gauge.
5. Apparatus according to claim 2,3 or4, wherein the meansforcontrolling said solvent-fuel mixture feeding means comprises means for operating said fuel injection valves disposed in operable association with said vehicle engine, manual switch means for determining the commencement or cessation of operation of said feeding means, and means four operably associating said valve operating means and said manuatswitch means with said powering means.
6. Apparatus in accordance with claim 5, further comprising timer means overriding said manual switch means for ceasing operation of said apparatus after a selected amount of time.
7. Apparatus in accordance with claim 6, wherein said timer means includes means for control ling the operation of said pumping means.
8. Apparatus in accordancewith claim 6Or7, wherein saidtimer means includes meansforcontroll- ing the operation of said fuel injection valve operating means.
9. Apparatus in accordance with claim 6,7 or 8, wherein said controlling means for said feeding means further comprises relay means for controlling the operation of said pumping means and timer means for controlling said relay means overriding said manual switch means.
10. Apparatus according to any one of claims 6 to 9, wherein the means for powering said controlling means comprises a source of power, the valve operating means and said manual switch means being operably associated with said source of power.
11. Apparatus in accordance with any preceding claim, wherein said feeding means comprises means for filtering said mixture.
12. Apparatus in accordance with any preceding claim, wherein said valve system comprises a plurality offuel injection valves disposed on one engine.
13. Apparatus in accordance with any preceding claim, further comprising means for collecting and measuring fluid downstream of said at least one fuel injection valve.
14. A process of cleaning the fuel injection valve system of a vehicle engine, said valve system including at least one fuel injection valve operably secured to and associated with said engine, means for supplying fuel to said at least one valve, means for controlling said at least one valve to feed fuel to said engine, and means for powering said controlling means, utilizing a cleaning apparatus including means forfeeding a solvent-fuel mixture and means for controlling said feeding means and said fuel injection valve system, said process comprising the steps of: disconnecting said fuel supply means from said valve system; disconnecting said vehicle fuel injection valve system controlling means from said powering means; operably connecting said feeding means of said cleaning apparatus to said fuel injection valve system; operably connecting said apparatus fuel injection valve system controlling means to said fuel injection valve system; commencing operation of said feeding means and said apparatus fuel injection valve system controlling means; and commencing the operation ofvehicle engine.
15. A process in accordance with claim 14,further comprising the step of connecting said apparatus fuel injection valve system controlling means to said powering means of said vehicle.
16. A process of cleaning the fuel injection valve system of a vehicle engine, such process being substantially as herein described with reference to the accompanying drawings.
17. Apparatusforcleaning the fuel injection valve system of a vehicle engine, such apparatus being constructed and arranged to operate substantially as herein described with reference to and as illustrated in the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US33687082A | 1982-01-04 | 1982-01-04 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB8301975D0 GB8301975D0 (en) | 1983-02-23 |
| GB2134178A true GB2134178A (en) | 1984-08-08 |
Family
ID=23318038
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08301975A Withdrawn GB2134178A (en) | 1982-01-04 | 1983-01-25 | In situ cleaning of i.c. engine fuel injection systems |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPS58119965A (en) |
| DE (2) | DE8226279U1 (en) |
| FR (1) | FR2540565A1 (en) |
| GB (1) | GB2134178A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0307204A2 (en) * | 1987-09-08 | 1989-03-15 | Petro Chemical Products Inc. | Apparatus for cleaning fuel injectors and combustion chambers |
| WO1992003641A1 (en) * | 1990-08-17 | 1992-03-05 | Wynn's Belgium N.V. | Device for cleaning a fuel supply system |
| GB2521275A (en) * | 2013-12-11 | 2015-06-17 | Engym Services Ltd | Apparatus and method for engine fuel systems |
| US11828259B1 (en) * | 2022-06-24 | 2023-11-28 | Daimler Truck North America Llc | Cleaning, maintaining, refurbishing, and/or diagnosing engine components including fuel-injectors |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3541497A1 (en) * | 1985-11-23 | 1987-05-27 | Hatz Motoren | MULTI-CYLINDER INJECTION ENGINE |
| FR2653168B1 (en) * | 1989-10-13 | 1992-03-06 | Gary Alain | DEVICE FOR CLEANING AND CONTROLLING INJECTORS FOR PETROL ENGINES. |
| AU2188492A (en) * | 1992-06-05 | 1994-01-04 | Triangle Special Products Group | Fuel injection cleaning and testing system and apparatus |
| DE102016125156B4 (en) | 2015-12-23 | 2023-08-10 | Volkswagen Aktiengesellschaft | Process for cleaning a fuel injection valve using ultrasonic excitation |
| CN107178439A (en) * | 2016-03-11 | 2017-09-19 | 日立汽车系统(苏州）有限公司 | Engine fueling injection equipment, engine system and engine fuel injection control method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3818876A (en) * | 1971-08-16 | 1974-06-25 | M Voogd | Smog control system and method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3068876A (en) * | 1960-08-02 | 1962-12-18 | Hartridge Ltd Leslie | Apparatus for cleaning the nozzle bodies of the injectors of compression ignition internal combustion engines |
| JPS588259A (en) * | 1981-07-03 | 1983-01-18 | Nissan Motor Co Ltd | Cleaning method and device for fuel injection valve |
-
1982
- 1982-09-17 DE DE19828226279 patent/DE8226279U1/en not_active Expired
- 1982-09-17 DE DE19823234553 patent/DE3234553A1/en not_active Withdrawn
- 1982-12-28 JP JP23514482A patent/JPS58119965A/en active Pending
-
1983
- 1983-01-25 GB GB08301975A patent/GB2134178A/en not_active Withdrawn
- 1983-02-08 FR FR8301953A patent/FR2540565A1/en not_active Withdrawn
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3818876A (en) * | 1971-08-16 | 1974-06-25 | M Voogd | Smog control system and method |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0307204A2 (en) * | 1987-09-08 | 1989-03-15 | Petro Chemical Products Inc. | Apparatus for cleaning fuel injectors and combustion chambers |
| EP0307204A3 (en) * | 1987-09-08 | 1989-08-23 | Petro Chemical Products Inc. | Apparatus for cleaning fuel injectors and combustion chambers |
| WO1992003641A1 (en) * | 1990-08-17 | 1992-03-05 | Wynn's Belgium N.V. | Device for cleaning a fuel supply system |
| BE1004545A3 (en) * | 1990-08-17 | 1992-12-08 | Wynn S Belgium N V | Device for cleaning the fuel system. |
| GB2521275A (en) * | 2013-12-11 | 2015-06-17 | Engym Services Ltd | Apparatus and method for engine fuel systems |
| US11828259B1 (en) * | 2022-06-24 | 2023-11-28 | Daimler Truck North America Llc | Cleaning, maintaining, refurbishing, and/or diagnosing engine components including fuel-injectors |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58119965A (en) | 1983-07-16 |
| DE3234553A1 (en) | 1983-07-14 |
| FR2540565A1 (en) | 1984-08-10 |
| GB8301975D0 (en) | 1983-02-23 |
| DE8226279U1 (en) | 1984-03-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |