GB2047899A - An Electrical Position Sensor for a Fuel Injection Pump - Google Patents
An Electrical Position Sensor for a Fuel Injection Pump Download PDFInfo
- Publication number
- GB2047899A GB2047899A GB8007596A GB8007596A GB2047899A GB 2047899 A GB2047899 A GB 2047899A GB 8007596 A GB8007596 A GB 8007596A GB 8007596 A GB8007596 A GB 8007596A GB 2047899 A GB2047899 A GB 2047899A
- Authority
- GB
- United Kingdom
- Prior art keywords
- position sensor
- sensor
- pump
- electrical position
- governor
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/20—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature
- G01D5/22—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature differentially influencing two coils
- G01D5/2208—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature differentially influencing two coils by influencing the self-induction of the coils
- G01D5/2216—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature differentially influencing two coils by influencing the self-induction of the coils by a movable ferromagnetic element, e.g. a core
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D1/00—Controlling fuel-injection pumps, e.g. of high pressure injection type
- F02D1/02—Controlling fuel-injection pumps, e.g. of high pressure injection type not restricted to adjustment of injection timing, e.g. varying amount of fuel delivered
- F02D1/025—Controlling fuel-injection pumps, e.g. of high pressure injection type not restricted to adjustment of injection timing, e.g. varying amount of fuel delivered by means dependent on engine working temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D1/00—Controlling fuel-injection pumps, e.g. of high pressure injection type
- F02D1/02—Controlling fuel-injection pumps, e.g. of high pressure injection type not restricted to adjustment of injection timing, e.g. varying amount of fuel delivered
- F02D1/08—Transmission of control impulse to pump control, e.g. with power drive or power assistance
- F02D1/12—Transmission of control impulse to pump control, e.g. with power drive or power assistance non-mechanical, e.g. hydraulic
- F02D1/122—Transmission of control impulse to pump control, e.g. with power drive or power assistance non-mechanical, e.g. hydraulic control impulse depending only on engine speed
- F02D1/127—Transmission of control impulse to pump control, e.g. with power drive or power assistance non-mechanical, e.g. hydraulic control impulse depending only on engine speed using the pressure developed in a pump
-
- 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
- F02M41/00—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor
- F02M41/08—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined
- F02M41/10—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined pump pistons acting as the distributor
- F02M41/12—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined pump pistons acting as the distributor the pistons rotating to act as the distributor
- F02M41/123—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined pump pistons acting as the distributor the pistons rotating to act as the distributor characterised by means for varying fuel delivery or injection timing
- F02M41/125—Variably-timed valves controlling fuel passages
- F02M41/126—Variably-timed valves controlling fuel passages valves being mechanically or electrically adjustable sleeves slidably mounted on rotary piston
-
- 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
- F02M41/00—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor
- F02M41/08—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined
- F02M41/10—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined pump pistons acting as the distributor
- F02M41/12—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined pump pistons acting as the distributor the pistons rotating to act as the distributor
- F02M41/123—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined pump pistons acting as the distributor the pistons rotating to act as the distributor characterised by means for varying fuel delivery or injection timing
- F02M41/128—Varying injection timing by angular adjustment of the face-cam or the rollers support
-
- 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
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/005—Arrangement of electrical wires and connections, e.g. wire harness, sockets, plugs; Arrangement of electronic control circuits in or on fuel injection apparatus
-
- 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
- F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
-
- 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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
- F02M63/0205—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively for cutting-out pumps or injectors in case of abnormal operation of the engine or the injection apparatus, e.g. over-speed, break-down of fuel pumps or injectors ; for cutting-out pumps for stopping the engine
- F02M63/022—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively for cutting-out pumps or injectors in case of abnormal operation of the engine or the injection apparatus, e.g. over-speed, break-down of fuel pumps or injectors ; for cutting-out pumps for stopping the engine by acting on fuel control mechanism
-
- 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/24—Fuel-injection apparatus with sensors
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- High-Pressure Fuel Injection Pump Control (AREA)
- Measuring Volume Flow (AREA)
Abstract
An electrical position sensor for fuel injection pumps, particularly distributor type pumps, the pump having a speed governor (9) which actuates a fuel quantity control member (4) by way of a governor lever (6). In order to measure the quantity of fuel injected the governor lever (6) is directly connected to a movable portion (24) of a position sensor (21). It is thereby ensured that the sensor only measures the actual quantity of fuel injected. <IMAGE>
Description
SPECIFICATION
An Electrical Position Sensor for a Fuel
Injection Pump
The invention relates to an electrical position sensor for a fuel injection pump having a speed governor and a governor lever for actuating an injection quantity control member.
In a known fuel injection pump of this kind, the position sensor measures movements of the governor which do not unconditionally correspond to the quantity of fuel injected. Apart from this possibility of error, the arrangement of the position sensors in the known pumps is either unfavourable with respect to the spatial volume, or the position sensors are not easily accessible for any repairs which may be required.
According to the present invention there is provided an electrical position sensor for fuel injection pumps having a speed governor and a governor lever directly connected to an injection quantity control member, the position sensor comprising a non-movable portion for location in a housing of the injection pump and movable portion adapted to co-operate directly with the governor lever so that adjustment of the control member effects proportional adjustment of the movable portion.
The electrical position sensor, in accordance with the invention has the advantage that the quantity of fuel injected is measured extremely accurately. Errors cannot occur. A further advantage is that, although the delivery quantity regulating member'is displaced upon adjusting the governor lever by, for example, displacing the support point of the governor lever, the movable part of the sensor is not displaced. A further advantage, which should not be underestimated, is that the sensor can be disposed at a location which is advantageous with respect to the type of construction or the electrical connection for the fuel injection pump, and, in particular, a-saving of volume can be taken into account.
The invention will now be described further, by way of example only, with reference to the accompanying drawings, in which: Figure 1 is a longitudinal partially sectional view of a fuel injection pump in accordance with the invention, and
Figure 2 is a fragmentary sectional view of a second embodiment of the invention.
The injection pump of Figure 1 has a pump piston 1 which is reciprocated and simultaneously rotated by means which are not illustrated. The pump piston 1 incorporates a relief passage 2 of a pump working chamber (not illustrated) which is opened towards a suction chamber 3 of the injection pump by means of an annular valve slide 4, serving as a fuel quantity control member, as soon as the pump piston 1 has covered a corresponding delivery stroke. The quantity of fuel delivered during this delivery stroke, and before the relief passage 2 is opened, passes by way of passages to respective injection nozzles for each cylinder of the engine and is injected. The further the annular valve slide 4 is displaced towards the pump working chamber, the larger is the quantity of fuel injected, and the further downwardly it is disposed, the smaller is the quantity of fuel injected.The pump working chamber is also supplied with fuel from the suction chamber 3 by passages and control means (not illustrated).
The annular valve slide 4 is adjusted by a speed governor 5 which acts upon the annular valve slide 4 by way of a governor lever 6, mounted at 7, and a swivel head 8. The governor lever 6 is actuated by a regulating piston 9 of the speed governor operating as a hydraulic governor. The regulating piston 9 is subjected to hydraulic pressure prevailing in the suction chamber 3 which acts against the force of governing springs (not illustrated) whose force is preferably arbitrarily adjustable. The pressure in the suction chamber 3 is controlled in dependence upon rotational speed and increases as the rotational speed increases, the vice versa.When the regulating piston 9 is displaced upwardly as a result of the pressure rising in the suction chamber 3 as the rotational speed increases, the annular valve slide 4 is at the same time displaced downwardly whereby the relief passage 2 is opened at an earlier instant during the pressure stroke. The quantity of fuel injected is thereby decreased, thus resulting in a reduction in the engine speed. The regulating piston 9 has a neck 10 against whose end faces, which delimit the neck with respect to the larger diameter, the governor lever 6 engages. An elbow 1 2 of the governor lever 6 abuts directly against the annular end face 11 which entrains the governor lever 6 in a direction to decrease the quantity of fuel injected. A drag spring 14 is secured to the governor lever 6 and abuts the other end face 13.
It is thereby possible to displace the governor lever 6 into a position for zero delivery, that is to say, to fully open the relief passage 2, without the regulating piston 9 of the speed governor having to follow this movement. Thus, it is possible to cut off the injection operation by way of the governor lever 6 without this cut-off operation having to be followed by the speed governor 5 and, in particular, the adjusting lever (not illustrated) for adjustment of the governor in order to vary its regulating forces.
In order to be able to displace the annular valve slide 4 into a position for zero delivery, that is to say, to displace it downwardly, the armature 1 6 of an actuating solenoid 1 7 acts upon that end 1 5 of governor lever 6 which is remote from the annular valve slide 4. The solenoid 1 7 is energized when it is in its illustrated position, the armature 1 6 being pulled into the solenoid against the force of a return spring 1 8. When the engine is not running, the armature 1 6 is pushed out by the spring 18 and the governor lever 6 is thereby displaced upwardly against the force of the drag spring 14, so that the annular valve slide 4 is displaced downwardly into a position for zero delivery.As soon as the ignition switch is actuated in order to start the engine, the solenoid 17 is energized and the armature 16 is pulled in against the force of the spring 18, whereby the governor lever 6 is actuated by the drag spring 1 4 and is displaced into the position shown in the Figure. The annular valve slide 4 thereby assumes a position for full load, that is to say, a position for the maximum delivery quantity during normal operation. As soon as the solenoid 1 7 is de-energized by some safety circuit or other, or by the ignition switch the spring 1 8 displaces the armature 1 6 towards the governor lever 6, so that the governor lever 6 is again displaced into a position for zero delivery quantity against the force of the drag spring 14.
The governor lever 6 is of cranked construction and its portion 1 5 is arranged obliquely to the axis of the armature 6, so that an actuation is possible despite the transverse position of the solenoid 1 7.
The solenoid 17 is arranged in a cover 1 9 of the pump housing 20 at right angies to the axis of the regulating piston 9, so that the dimensions result in a type of construction which is extremely advantageous with respect to the effects of temperature.
As is shown in the drawings, adequate space still remains for other electrical sensors which are being increasingly required in pumps of this kind.
Thus, in the present instance, a sensor 21 is shown by means of which the position of the annular valve slide 4 is measurable for evaluation in an electronic control device. The sensor has a fixed armature 22 which has a coil 23 and onto which is slipped a short-circuit ring 24 which is rigidly connected to the governor lever 6. Since the governor lever 6 is directly articulated to the annular valve slide 4, every position of the shortcircuit ring 24 corresponds to a position of the annular valve slide 4 and thus to a quantity of fuel actually injected. The measured quantities are transmitted to the control device (not illustrated) by way of a plug 25.
In order to set the injection quantity regulation, the support point 7 of the governor lever 6 is adjustable by way of a plate 26 on which the support point 7 is disposed and which is displaceable by a screw 27 shown by dash-dot lines. Although the annular valve slide 4 is adjusted during this displacement, the ring 24 of the position sensor is not adjusted.
A differential choke sensor 30 serves as the sensor in the embodiment illustrated in Figure 2.
One end of the governor lever 6 is split in this embodiment, the portion 15' being actuated by the solenoid 17, whereas a portion 31 of the governor lever 6 actuates the position sensor 30.
For this purpose, the position sensor 30 has a ferrite core 32 which is displaceable within two induction coils 34 against the force of a weak return spring 33 which does not influence the governor. The measured quantities are then transmitted to the electronic control device (not illustrated) by way of a plug 25'.
In the same manner as is illustrated in Figure 2, a so-called proximity sensor can be used instead of the differential choke sensor described above.
Claims (7)
1. An electrical position sensor for fuel injection pumps having a speed governor and a governor lever directly onnected to an injection quantity control member, the position sensor comprising a non-movable portion for location in a housing of the injection pump and a movable portion adapted to co-operate directly with the governor lever, so that adjustment of the control member effects proportional adjustment of the movable portion.
2. An electrical position sensor as claimed in claim 1, in which travel of the movable portion is measured by the variation in an induction voltage.
3. An electrical position sensor as claimed in claim 1 or 3, in which a short-circuit ring serves as the movable portion of the sensor and is displacable relative to a coil core.
4. An electrical position sensor as claimed in claim 1 or 2, in which the movable part of the sensor is an iron core displaceable in two coils serving as a differential choke.
5. An electrical sensor as claimed in any one of the preceding claims, in combination with a fuel injection pump, the pump being in the form of a distributor type pump having a reciprocating pump piston and an annular valve slide which is arranged around the pump piston and which serves as an injection quantity control member, a speed governor acting upon a governor lever, in the sense of a rocker arm which is mounted between the control member and the point of application of the speed governor.
6. An electrical position sensor constructed and arranged substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.
7. An electrical position sensor in combination with a fuel injection pump constructed and adapted to operate substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19792909555 DE2909555A1 (en) | 1979-03-10 | 1979-03-10 | FUEL INJECTION PUMP |
| DE19792909624 DE2909624A1 (en) | 1979-03-12 | 1979-03-12 | Fuel injection system for IC engine - determines actual fuel quantity injected by measuring movement of fuel regulator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2047899A true GB2047899A (en) | 1980-12-03 |
| GB2047899B GB2047899B (en) | 1984-03-07 |
Family
ID=25778163
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8007596A Expired GB2047899B (en) | 1979-03-10 | 1980-03-06 | Electrical position sensor for a fuel injection pump |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR2451466A1 (en) |
| GB (1) | GB2047899B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2529620A1 (en) * | 1982-07-05 | 1984-01-06 | Daimler Benz Ag | METHOD OF CONTROLLING THE FUEL INJECTION OF FUEL FOR AN INTERNAL COMBUSTION ENGINE |
| GB2138572A (en) * | 1983-04-15 | 1984-10-24 | Bosch Gmbh Robert | Detecting the position of a control member |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112177780B (en) * | 2020-09-30 | 2022-07-19 | 重庆红江机械有限责任公司 | Electro-hydraulic speed regulator based on speed and position feedback |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH335899A (en) * | 1954-07-31 | 1959-01-31 | Daimler Benz Ag | Device for monitoring the performance of internal combustion engines operated with fuel injection |
| DE1751765A1 (en) * | 1968-07-25 | 1971-08-05 | Bosch Gmbh Robert | Control device for injection internal combustion engines |
| JPS5115885Y2 (en) * | 1971-11-18 | 1976-04-26 | ||
| GB1550466A (en) * | 1976-07-02 | 1979-08-15 | Lucas Industries Ltd | Fuel pump assembly |
-
1980
- 1980-03-06 GB GB8007596A patent/GB2047899B/en not_active Expired
- 1980-03-06 FR FR8005085A patent/FR2451466A1/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2529620A1 (en) * | 1982-07-05 | 1984-01-06 | Daimler Benz Ag | METHOD OF CONTROLLING THE FUEL INJECTION OF FUEL FOR AN INTERNAL COMBUSTION ENGINE |
| GB2138572A (en) * | 1983-04-15 | 1984-10-24 | Bosch Gmbh Robert | Detecting the position of a control member |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2451466A1 (en) | 1980-10-10 |
| GB2047899B (en) | 1984-03-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |