WO2001088364A1 - Dispositif d'injection de carburant - Google Patents
Dispositif d'injection de carburant Download PDFInfo
- Publication number
- WO2001088364A1 WO2001088364A1 PCT/JP2001/004037 JP0104037W WO0188364A1 WO 2001088364 A1 WO2001088364 A1 WO 2001088364A1 JP 0104037 W JP0104037 W JP 0104037W WO 0188364 A1 WO0188364 A1 WO 0188364A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fuel
- pressure
- chamber
- communicating
- fuel injection
- Prior art date
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 182
- 238000002347 injection Methods 0.000 title claims abstract description 97
- 239000007924 injection Substances 0.000 title claims abstract description 97
- 239000007787 solid Substances 0.000 claims description 4
- 241001634822 Biston Species 0.000 claims 1
- FFGPTBGBLSHEPO-UHFFFAOYSA-N carbamazepine Chemical compound C1=CC2=CC=CC=C2N(C(=O)N)C2=CC=CC=C21 FFGPTBGBLSHEPO-UHFFFAOYSA-N 0.000 claims 1
- 238000002485 combustion reaction Methods 0.000 description 8
- 238000009413 insulation Methods 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 230000010354 integration Effects 0.000 description 2
- 239000013618 particulate matter Substances 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 230000004323 axial length Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
- 230000001360 synchronised 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
- F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
-
- 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
- F02M63/0012—Valves
- F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
- F02M63/0049—Combined valve units, e.g. for controlling pumping chamber and injection valve
-
- 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
- F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
- F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
- F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
-
- 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
- F02M59/10—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 characterised by the piston-drive
- F02M59/105—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 characterised by the piston-drive hydraulic drive
-
- 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
- F02M63/0012—Valves
- F02M63/0014—Valves characterised by the valve actuating means
- F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
- F02M63/0026—Valves characterised by the valve actuating means electrical, e.g. using solenoid using piezoelectric or magnetostrictive actuators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/20—Output circuits, e.g. for controlling currents in command coils
- F02D41/2096—Output circuits, e.g. for controlling currents in command coils for controlling piezoelectric injectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/3809—Common rail control systems
Definitions
- the present invention relates to a fuel injection device configured to inject and supply high-pressure fuel accumulated in a common rail into each cylinder of an internal combustion engine by a fuel injection valve.
- the high-pressure fuel pumped from the high-pressure pump is stored in the common rail, and the high-pressure fuel in the common rail is electrically calculated and set in each cylinder of the internal combustion engine at the set injection timing.
- common-rail fuel injection devices configured to inject fuel from a fuel injection valve have been widely adopted.
- the common rail pressure should be relatively low to reduce noise and ensure smooth rotation during idling.
- the common rail pressure should be as high as possible in order to reduce the generation of black smoke and particulate matter (PM) during high loads.
- Japanese Patent Application Laid-Open No. H08-21332 has provided a low pressure piston for increasing the pressure of high pressure fuel supplied from a common rail.
- the high pressure injection based on the operation of the low pressure piston and the low pressure injection corresponding to the non-operation state of the low pressure piston are switched by a controller.
- a common rail type fuel injection device adapted to be used.
- the disclosed device has a configuration in which high-pressure fuel from the common rail or boosted high-pressure fuel from the booster piston is selectively supplied to the fuel injection valve by switching control using two solenoid valves.
- An object of the present invention is to provide a fuel injection device that can solve the above-described problems in the related art.
- Another object of the present invention is to provide a fuel injection device capable of changing the pressure of fuel supplied to a fuel injection valve very quickly with a simple configuration.
- Still another object of the present invention is to provide a fuel injection device capable of reducing the size of a control circuit for high-speed switching of the pressure of fuel supplied to a fuel injection valve. .
- Another object of the present invention is to provide a fuel injection device capable of suppressing the level of electrical noise energy output from a drive unit when the pressure of fuel supplied to a fuel injection valve is changed. It is in. Disclosure of the invention
- a fuel injection device includes a common rail for storing high-pressure fuel pressurized by a high-pressure pump, a needle valve, an injection fuel reservoir, and an oil chamber for applying back pressure to the needle valve.
- a fuel injection valve comprising: an injection fuel reservoir and the common; A supply oil passage communicating with a rail, a pressurizer disposed in the supply oil passage so that the high-pressure fuel can be depressurized and sent out to the injection fuel reservoir as a boosted high-pressure fuel; A switching device for switching fuel supplied to the fuel injection reservoir to the high-pressure fuel from the common rail or the boosted high-pressure fuel from the compressor. ing.
- the switching device includes a switching valve driven by the electric actuator, and the switching valve communicates the oil chamber and / or the low-pressure part of the intensifier with the low-pressure part. It can be configured to perform fuel pressure switching.
- the switching valve has a first chamber that communicates with the pressure-intensifying piston chamber and a second chamber that communicates with the oil chamber, and a valve whose position is controlled by the electric actuator.
- the fuel pressure switching may be performed by connecting a port provided on the body and communicating with the low pressure section to the first chamber and / or the second chamber.
- the switching valve includes a piston provided with first and second ports which are positioned and driven by the electric actuator and are communicated with the low-pressure section, and the piston is housed therein.
- a cylinder provided with a first chamber communicating with the pressure-intensifying screw chamber and a second chamber communicating with the oil chamber; A first position where the first and second ports do not communicate with any of the first and second chambers; and a second chamber in which only the first ports are connected to the second chamber. And a third position where the first port communicates with the second chamber while the second port communicates with the first chamber.
- a configuration capable of positioning can be adopted.
- the fuel injection device in the fuel injection device having the above-described configuration, further includes a control circuit for driving the electric actuator.
- the control circuit is assembled on at least three layers of the printed wiring board, and the wiring on the high voltage side of the high voltage part of the circuit for driving the electrical actuator is connected to the inner layer of the printed wiring board. It is performed using.
- the printed wiring board may be configured to be divided into a first area where the control circuit is assembled and a second area where circuits other than the control circuit are assembled.
- the printed wiring board may have at least four layers, and the wiring on the ground side of the high voltage portion may be performed using the inner layer of the printed wiring board. Unnecessary radiation may be reduced by making the ground side wiring a solid wiring.
- a pressure regulator for increasing the pressure of the high-pressure fuel from the common rail is provided.
- the fuel supplied to the fuel injection valve is switched to either the high-pressure fuel or the low-pressure high-pressure fuel by an electric mechanism. If a piezoelectric actuator is used, the switching can be performed very quickly. Also, unlike the conventional control of driving two solenoid valves while maintaining a required period, the fuel pressure can be instantaneously switched in the form of a switching valve by one electric actuator, so that the actuator is controlled. It is not necessary to take into account variations in the characteristics of Yue and temperature characteristics, and the configuration of the electric circuit for drive control is simple, and costs can be reduced.
- control circuit for the electrical actuation such as the piezoelectric actuating circuit uses a multi-layer printed wiring board, and the wiring on the high voltage side of the high voltage section is performed using the inner layer. Even if the voltage of the power supply is switched at high speed throughout the electrical factor, the inner layer is covered with insulating material, so the dielectric strength is high and insulation failure is unlikely to occur. This makes it possible to reduce the size by using high-density wiring, and to achieve high integration despite the use of high voltages. Wear. In addition, it is necessary to increase the drive voltage for high speed operation. However, as described above, the insulation performance is excellent, and this requirement can be met. It is possible to realize accurate and quick fuel injection.
- the wiring of the ground circuit using the inner layer is a solid wiring, the level of unnecessary radiation from the printed wiring board can be reduced as much as possible, and the generation of noise signals can be suppressed satisfactorily.
- FIG. 1 is a configuration diagram showing an example of an embodiment of a fuel injection device according to the present invention.
- FIG. 2 is a circuit diagram showing a specific example of a control circuit for controlling an injection operation of a fuel injection valve of the fuel injection device shown in FIG.
- FIG. 3 is a cross-sectional view of a multilayer wiring board for mounting the control circuit shown in FIG. BEST MODE FOR CARRYING OUT THE INVENTION
- FIG. 1 is a configuration diagram showing one embodiment of a fuel injection device according to the present invention.
- the fuel injection device 1 is a common rail type fuel injection device for injecting and supplying fuel to an internal combustion engine (not shown) used for driving a vehicle.
- the fuel injection device 1 pumps fuel 3 in a fuel tank 2 with a high-pressure pump.
- the fuel is pressurized by 4 and accumulated in the common rail 5, and the high-pressure fuel accumulated in the common rail 5 is supplied to the fuel injection valve 7 through a supply oil passage 6 having oil passages 6 A and 6 B as described later.
- the fuel injection valve 7 is attached to one of a plurality of cylinders of an internal combustion engine (not shown), and is used for directly injecting high-pressure fuel into the cylinder by the fuel injection valve 7. Although only one fuel injection valve 7 is shown in FIG. 1, the same number of fuel injection valves 7 as the number of cylinders of the internal combustion engine are prepared for each cylinder.
- the basic configuration of the fuel injection valve 7 is known per se.
- the fuel injection valve 7 has a nozzle 7C provided with a plurality of fuel injection holes ⁇ A formed at the tip thereof and a fuel reservoir 7B for storing fuel supplied to the fuel injection holes 7A.
- a nozzle valve 7D for controlling communication between the fuel reservoir 7B and the injection hole 7A is slidably housed in the nozzle 7C, and the needle valve 7D is stored in the nozzle holder 7E.
- An oil chamber 7G is formed in the nozzle holder 7E, and a hydraulic piston 7H is slidably fitted in the oil chamber 7G coaxially with the needle valve 7D.
- the oil chamber 7G is connected through an orifice 7I and an oil passage 6C to a fuel reservoir 7B to which the oil passage 6B is connected.
- the supply oil passage 6 is provided with a check valve 8 as shown in the figure. That is, the check valve 8 is disposed between the oil passages 6A and 6B, whereby the high-pressure fuel in the common rail 5 passes through the supply oil passage 6 to the fuel reservoir 7B. However, the fuel is not allowed to flow backward from the fuel reservoir 7B side to the common rail 5 side through the supply oil passage 6.
- An intensifier 9 is connected in parallel with the check valve 8 so that the high-pressure fuel from the common rail 5 can be depressurized to supply a higher-pressure intensified high-pressure fuel to the fuel reservoir 7B.
- the intensifier 9 has a large-diameter piston 9A and a small-diameter screw. Screw 9C, a large-diameter cylinder 9D into which the large-diameter piston 9A is inserted, and a small-diameter into which the small-diameter piston 9B is integrally formed. It has a cylinder 9E and a spring return spring 9F.
- the low-pressure chamber 9Ea of the small-diameter cylinder 9E is communicated with the fuel reservoir 7B via the oil passage 6D, and the large-diameter cylinder 9D of the chamber 9Da is communicated via the oil passage 6E.
- the pressure regulator 9 is connected in parallel to the check valve 8.
- the other chamber 9Db and the chamber 9Da of the large-diameter cylinder 9D are connected by an orifice 9G. Since the compressor 9 is configured as described above, the pressure increase according to the area ratio between the large-diameter piston 9A and the small-diameter piston 9B from the pressure-increasing chamber 9Ea of the small-diameter cylinder 9E. High pressure fuel can be output.
- the check valve 8 and the booster 9 are connected in parallel as described above, when the pressurizer 9 is activated and the booster high-pressure fuel is sent out from the booster chamber 9Ea, the check valve 8 is connected to the common rail. Since the pressure on the fuel reservoir ⁇ ⁇ B side becomes higher than that on the 5th side, the check valve 8 is closed, and the fuel reservoir 7B receives the high-pressure fuel from the booster 9 instead of the high-pressure fuel from the common rail 5. Will be supplied. On the other hand, when the pressure regulator 9 is not operating and the pressure in the booster chamber 9Ea becomes lower than the high-pressure fuel in the common rail 5, the check valve 8 is opened and the high-pressure fuel in the common rail 5 reverses. The fuel is supplied to the fuel reservoir 7B through the stop valve 8.
- the reference numeral 10 indicates that the fuel supplied to the fuel reservoir 7 B of the fuel injection valve 7 is switched to either the high-pressure fuel from the common rail 5 or the high-pressure fuel from the pressurizer 9. This is a hydraulic circuit for switching.
- the hydraulic circuit 10 is connected to the first chamber 1 OA connected to the oil chamber 7 G by the oil path 1 I and the orifice 12 and to the chamber 9 Db by the oil path 13.
- the piston 10E is provided with a piston receiving hole.
- a relief passage 10Ea communicating with the low-pressure portion is formed in the piston 10E along the axial direction, and a pair of ports 1 communicating with the relief passage 10Ea is formed. 0 Eb and 10 Ec are formed.
- an opening 10 Aa is formed in the room 10 A so as to extend through the piston receiving hole 10 D
- an opening 10 B is formed in the room 10 B through the piston receiving hole 10 D.
- a is formed.
- the formation positions of the openings 10Aa and 10Ba are shifted along the axis of the cylinder 10C, so that the piston 10E is moved to the openings 10Aa and 10A.
- the first position that simultaneously closes Ba (the position shown in Fig. 1), the second position where only the opening 10Aa communicates with the escape passage 1 OEa, and the openings 10Aa and 10Ba At the same time as one of the third positions that communicates with the escape passage 10Ea.
- the piezoelectric actuator PA-1 is an actuator for positioning the piston 10E at any of the first to third positions.
- the piezoelectric actuator PA-1 is configured such that the axial length changes very responsively according to the voltage applied thereto.
- the piezoelectric actuator PA-11 is a control circuit 1 The configuration is such that the position of the piston 10E is determined in response to the control voltage signal V applied from step 4.
- the operation of the fuel injection device 1 will be described.
- the piston 10E acting as the valve body of the switching valve is in the first position, the pressure in the chamber 9Db of the intensifier 9 does not escape through the hydraulic circuit 10 and With the orifice 9G, the pressure in the chamber 9Da and the pressure in the chamber 9Db are the same as the pressure of the high-pressure fuel, so that no differential pressure acts on the large diameter piston 9A. Therefore, the pressurizing operation of the high-pressure fuel by the compressor 9 is not performed.
- the pressure of the oil chamber 7 G of the fuel injection valve 7 does not escape through the hydraulic circuit 10, and the fuel reservoir 7 B is provided by the orifice 7 I. And the pressure in the oil chamber 7 G are equal. As a result, the fuel injection valve 7 is kept closed by the force of the spring 7F.
- the chamber 9 Db is also communicated with the low pressure section via the hydraulic circuit 10. As a result, the pressure in the chamber 9 Db decreases, and a pressure difference is generated in the pressure acting on both sides of the large-diameter piston 9 A, and the pressure intensifier 9 is activated.
- the high-pressure high-pressure fuel obtained by increasing the high-pressure fuel is sent to the fuel reservoir 7B of the fuel injection valve 7, and the high-pressure high-pressure fuel is injected from the injection hole 7A into the corresponding cylinder. .
- the piezoelectric actuator PA-1 positions the piston 10E at the first position in response to the control voltage signal V, the injection stop mode is set, and the piezoelectric actuator PA-1 is set at the second position.
- the high pressure fuel injection mode is set, and when positioned at the third position, the increased pressure high pressure fuel injection mode is set.
- the high-pressure fuel or pressure increase In addition to being able to control ON / OFF of high pressure fuel injection, injection stop mode, high pressure fuel injection mode, boosted high pressure fuel Switching between the injection modes can be performed appropriately and extremely responsively. As a result, for example, it is possible to switch from the boosted high-pressure fuel injection mode to the high-pressure fuel injection mode depending on the operation state of the internal combustion engine simply by changing the voltage level of the control voltage signal V. Since complicated control such as controlling by synchronizing the valves is not required, the control circuit can be simplified, the cost can be reduced, and the controllability can be significantly improved.
- FIG. 2 shows an example of a specific circuit of the control circuit 14 for controlling the injection operation of the fuel injection valve 7 of the fuel injection device 1 shown in FIG.
- FIG. 1 shows only the fuel injection valve 7 and the pressure booster 9 and the hydraulic circuit 10 provided correspondingly, but in actuality, the fuel injection valve 7 and the pressure reducer 9
- the number of hydraulic circuits 10 is not one, but is equal to the number of cylinders of the internal combustion engine.
- an example in the case of six cylinders is shown. Therefore, since six sets of fuel injection valves, pressure regulators and hydraulic circuits are provided, in addition to the piezoelectric actuator PA-1, the other five piezoelectric actuators not shown in FIG. One night PA-2 to PA-6 are driven and controlled by the control circuit 14.
- the piezoelectric actuator PA-i corresponds to the fuel injection valve provided in the i-th cylinder.
- One end of each of the piezoelectric actuators PA-1, PA-3, and PA-5 is commonly connected to connector C1
- each end of the piezoelectric actuators PA-2, PA-4, and PA-16 is connected to connector C. Commonly connected to 2.
- the other ends of the piezoelectric actuators PA-1 to PA-6 are connected to connectors C3 to C8, respectively.
- reference numeral 21 denotes a low-voltage DC power supply
- the output voltage V cc of the power supply 21 is boosted by a booster circuit composed of a coil 22, a switching transistor T 1, and a diode D 1. 2 5 0
- a high voltage VH of about V is charged in the capacitor C 11.
- the high voltage section 30 to which the high voltage VH is supplied is composed of switching transistors T2 to T5, diodes D2 to D5, and resistors R1 and R2 connected as shown. I have.
- the high voltage VH charged in the capacitor CI1 is supplied to the switching transistors T4 and T5 via the switching transistor T2.
- the switching transistor T4 is connected to one end of each of the piezoelectric actuators PA-1, PA-3, and PA-5 via the connector C1, and the switching transistor T5 is connected to the connector C2 via the connector C2. It is connected to one end of each of the piezoelectric actuators PA-2, PA-4 and PA-6. Therefore, if switching transistor T4 is turned on when switching transistor T2 is on, high voltage VH is applied to one end of each of piezoelectric actuators PA-1, PA-3, and PA-5. can do. Similarly, when the switching transistor T5 is turned on, the high voltage VH can be applied to one end of each of the piezoelectric actuators PA-2, PA-4 and PA-6.
- the switching transistors T6 to T11 are connected to the other ends of the piezoelectric actuators PA-1 to PA_6 via connectors C3 to C8 as shown in the figure. If the transistors # 6 to # 11 are selectively turned on, the other end of the corresponding piezoelectric actuator can be set to the ground potential.
- control circuit 14 Since the control circuit 14 is configured as described above, for example, when the switching transistor # 2 is turned on and the switching transistor # 4 and the switching transistor # 6 are simultaneously turned on. For example, a high voltage V ⁇ can be applied to the piezoelectric actuator ⁇ -1. At this time, instead of turning on the switching transistor T2 continuously, a pulse voltage is applied to the base of the switching transistor T2, and the duty ratio is adjusted. The voltage applied to the piezoelectric actuator PA-1 can be set to the level of the high voltage VH 12 by performing the duty control of the ON operation of the switching transistor T2 by appropriately setting.
- the voltage applied state and the high voltage V It can be in one of three states: voltage application at 1/2 level and application of high voltage VH.
- the injection stop mode is set by applying no voltage
- the high-pressure fuel injection mode is set by applying a voltage 1/2 of the high voltage VH
- the boosted high-pressure fuel injection mode is set by applying the high voltage VH. It is configured so that This mode switching is performed by applying a control pulse signal from a circuit (not shown) to the control signal input terminals ⁇ 2 and ⁇ 4 to ⁇ 11 of the switching transistors ⁇ 2 and ⁇ 4 to ⁇ 11. Can be performed.
- the emitter circuit of the switching transistor # 1, the ground side of the capacitor CI1, and the emitter circuit of the switching transistor # 3 are at the ground potential.
- the voltage applied to the piezoelectric actuator PA-1 to PA-6 is applied to VH or VHZ2 by controlling the duty of the switching transistor 2.
- the switching transistors T3 to T11 are selectively turned on and off, and the corresponding pistons are controlled by the piezoelectric actuators PA-1 to PA-6 to the first and the second. It can be positioned at the second or third position.
- the charge discharge from the piezoelectric actuators ⁇ —1 to PA-6 generated when the switching transistors ⁇ 6 to ⁇ 11 are opened must be performed by closing the switching transistor T3. And it is released to the outside to increase the responsiveness of the piezoelectric actuator.
- the control circuit 14 of the circuit configuration shown in FIG. 2 has two outer layers 41, 42 and two inner layers 43, 44 as shown in FIG. 3, as shown in FIG. It is assembled on a four-layer printed wiring board 40, and the drive control circuit 14 is mounted in the first area 40A, and other than the control circuit 14 in the second area 40B, that is, the piezoelectric circuit
- Other circuits other than those for driving control of the actuator such as a circuit for calculating the opening and closing timing of each fuel injection valve, etc., are mounted.
- a high-voltage wiring section from the connection wiring section between the coil 22 and the diode D1 to the connectors C1 and C2 is performed using the inner layer 43.
- the wiring on the ground side of the section is performed using the inner layer 44.
- the remaining outer layers 4 1 and 4 2 are used for other wiring.
- the inner layer 43 is used for wiring on the high voltage side of other circuits
- the inner layer 44 is used for wiring of the ground circuit of other circuits.
- the outer layers 41 and 42 are used for other wiring for other circuits.
- the wiring of the ground circuit using the inner layer 44 is solid wiring, whereby the level of unnecessary radiation from the printed wiring board 40 is reduced as much as possible, and the generation of noise signals can be suppressed satisfactorily. I can do it. Note that the wiring of the ground circuit does not necessarily have to be on the inner layer 44 and the outer layer 41 or 42 may be used.
- control circuit 14 Since the control circuit 14 is wired as described above using the printed wiring board 40, a voltage of, for example, about 250 V is used as the high-voltage power supply 21 and this voltage is applied to the voltage circuit. Even if the voltage is switched at a high speed, the inner layer 43 is covered with an insulator, so that the withstand voltage is high and the insulation failure does not easily occur. For this reason, high-density wiring can be performed to reduce the size, and high integration can be achieved despite the use of a high voltage. In addition, it is necessary to increase the driving voltage to increase the speed. However, as described above, the insulation performance is excellent, and this requirement can be met. Is possible and positive Reliable and quick fuel injection can be realized.
- the fuel injection device according to the present invention is useful for improving the operating characteristics of the machine M when directly injecting and supplying fuel to the cylinder of the internal combustion engine for driving vehicles and other various devices.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Fuel-Injection Apparatus (AREA)
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/276,559 US6910463B2 (en) | 2000-05-17 | 2001-05-15 | Fuel injection device |
KR1020027015484A KR100706366B1 (ko) | 2000-05-17 | 2001-05-15 | 연료 분사 장치 |
EP01930154A EP1284357B8 (en) | 2000-05-17 | 2001-05-15 | Fuel injection device |
DE60124533T DE60124533T2 (de) | 2000-05-17 | 2001-05-15 | Brennstoffeinspritzvorrichtung |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000-144683 | 2000-05-17 | ||
JP2000144683A JP2001323858A (ja) | 2000-05-17 | 2000-05-17 | 燃料噴射装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001088364A1 true WO2001088364A1 (fr) | 2001-11-22 |
Family
ID=18651303
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2001/004037 WO2001088364A1 (fr) | 2000-05-17 | 2001-05-15 | Dispositif d'injection de carburant |
Country Status (6)
Country | Link |
---|---|
US (1) | US6910463B2 (ja) |
EP (1) | EP1284357B8 (ja) |
JP (1) | JP2001323858A (ja) |
KR (1) | KR100706366B1 (ja) |
DE (1) | DE60124533T2 (ja) |
WO (1) | WO2001088364A1 (ja) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2818323A1 (fr) * | 2000-12-20 | 2002-06-21 | Bosch Gmbh Robert | Installation d'injection de carburant |
WO2002093001A1 (de) * | 2001-05-17 | 2002-11-21 | Robert Bosch Gmbh | Kraftstoffeinspritzeinrichtung |
DE10141110A1 (de) * | 2001-08-22 | 2003-03-20 | Bosch Gmbh Robert | Kraftstoffeinspritzvorrichtung für Brennkraftmaschinen |
KR100704567B1 (ko) * | 2004-11-08 | 2007-04-06 | 미츠비시 후소 트럭 앤드 버스 코포레이션 | 커먼레일식 연료분사장치 |
Families Citing this family (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10141111B4 (de) * | 2001-08-22 | 2005-10-13 | Robert Bosch Gmbh | Kraftstoffeinspritzvorrichtung für Brennkraftmaschinen |
US6854446B2 (en) | 2002-07-11 | 2005-02-15 | Toyota Jidosha Kabushiki Kaisha | Fuel injection apparatus |
JP4167230B2 (ja) | 2004-01-13 | 2008-10-15 | デルファイ・テクノロジーズ・インコーポレイテッド | 燃料噴射装置 |
JP4088600B2 (ja) * | 2004-03-01 | 2008-05-21 | トヨタ自動車株式会社 | 増圧式燃料噴射装置の補正方法 |
JP4196869B2 (ja) * | 2004-03-31 | 2008-12-17 | 三菱ふそうトラック・バス株式会社 | 燃料噴射装置 |
JP4075894B2 (ja) * | 2004-09-24 | 2008-04-16 | トヨタ自動車株式会社 | 燃料噴射装置 |
JP4003770B2 (ja) * | 2004-10-01 | 2007-11-07 | トヨタ自動車株式会社 | 燃料噴射装置 |
US7568633B2 (en) * | 2005-01-13 | 2009-08-04 | Sturman Digital Systems, Llc | Digital fuel injector, injection and hydraulic valve actuation module and engine and high pressure pump methods and apparatus |
US7464697B2 (en) * | 2005-08-19 | 2008-12-16 | The United States Of America, As Represented By The Administrator Of The U.S. Environmental Protection Agency | High-pressure fuel intensifier system |
US7793638B2 (en) | 2006-04-20 | 2010-09-14 | Sturman Digital Systems, Llc | Low emission high performance engines, multiple cylinder engines and operating methods |
US20080264393A1 (en) * | 2007-04-30 | 2008-10-30 | Sturman Digital Systems, Llc | Methods of Operating Low Emission High Performance Compression Ignition Engines |
WO2008141237A1 (en) * | 2007-05-09 | 2008-11-20 | Sturman Digital Systems, Llc | Multiple intensifier injectors with positive needle control and methods of injection |
US7954472B1 (en) | 2007-10-24 | 2011-06-07 | Sturman Digital Systems, Llc | High performance, low emission engines, multiple cylinder engines and operating methods |
US7958864B2 (en) * | 2008-01-18 | 2011-06-14 | Sturman Digital Systems, Llc | Compression ignition engines and methods |
US20100012745A1 (en) | 2008-07-15 | 2010-01-21 | Sturman Digital Systems, Llc | Fuel Injectors with Intensified Fuel Storage and Methods of Operating an Engine Therewith |
US8596230B2 (en) * | 2009-10-12 | 2013-12-03 | Sturman Digital Systems, Llc | Hydraulic internal combustion engines |
US8887690B1 (en) | 2010-07-12 | 2014-11-18 | Sturman Digital Systems, Llc | Ammonia fueled mobile and stationary systems and methods |
US9206738B2 (en) | 2011-06-20 | 2015-12-08 | Sturman Digital Systems, Llc | Free piston engines with single hydraulic piston actuator and methods |
US9464569B2 (en) | 2011-07-29 | 2016-10-11 | Sturman Digital Systems, Llc | Digital hydraulic opposed free piston engines and methods |
JP5881505B2 (ja) | 2012-03-30 | 2016-03-09 | 三菱重工業株式会社 | 油圧駆動燃料噴射装置 |
CN102678409B (zh) * | 2012-05-21 | 2014-03-26 | 哈尔滨工程大学 | 相继增压式电控共轨喷油*** |
US9181890B2 (en) | 2012-11-19 | 2015-11-10 | Sturman Digital Systems, Llc | Methods of operation of fuel injectors with intensified fuel storage |
DE102014213182A1 (de) * | 2013-09-13 | 2015-03-19 | Ford Global Technologies, Llc | Verfahren zum Steuern der Kraftstoffeinspritzung sowie Kraftstoffeinspritzsystem |
US9771910B2 (en) * | 2015-06-25 | 2017-09-26 | Ford Global Technologies, Llc | Systems and methods for fuel injection |
US10100774B2 (en) * | 2015-06-25 | 2018-10-16 | Ford Global Technologies, Llc | Systems and methods for fuel injection |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6075677U (ja) * | 1983-10-31 | 1985-05-27 | いすゞ自動車株式会社 | 内燃機関の燃料噴射装置 |
JPS64352A (en) * | 1987-06-19 | 1989-01-05 | Nippon Denso Co Ltd | Fuel injector |
JPH0222663U (ja) * | 1988-07-30 | 1990-02-15 | ||
JPH0264752U (ja) * | 1988-11-02 | 1990-05-15 | ||
JPH03272204A (ja) * | 1990-03-22 | 1991-12-03 | Matsushita Electric Ind Co Ltd | 電圧制御発振器 |
JPH07283546A (ja) * | 1994-04-08 | 1995-10-27 | Furukawa Electric Co Ltd:The | 高耐圧大電流配線板 |
JPH11330711A (ja) * | 1998-05-14 | 1999-11-30 | Futaba Corp | 多層基板 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57124073A (en) * | 1981-01-24 | 1982-08-02 | Diesel Kiki Co Ltd | Fuel injection device |
JPH0222663A (ja) * | 1988-07-11 | 1990-01-25 | Canon Inc | 電子写真感光体 |
JP2885076B2 (ja) * | 1994-07-08 | 1999-04-19 | 三菱自動車工業株式会社 | 蓄圧式燃料噴射装置 |
US5697342A (en) * | 1994-07-29 | 1997-12-16 | Caterpillar Inc. | Hydraulically-actuated fuel injector with direct control needle valve |
US5875764A (en) * | 1998-05-13 | 1999-03-02 | Siemens Aktiengesellschaft | Apparatus and method for valve control |
DE19908217B4 (de) * | 1999-02-25 | 2005-03-17 | Siemens Ag | Anordnung und Verfahren zur Druckverstärkung von Kraftstoff für einen Kraftstoffinjektor |
DE19910970A1 (de) * | 1999-03-12 | 2000-09-28 | Bosch Gmbh Robert | Kraftstoffeinspritzeinrichtung |
DE19939429A1 (de) * | 1999-08-20 | 2001-03-01 | Bosch Gmbh Robert | Kraftstoffeinspritzeinrichtung |
DE19945785B4 (de) * | 1999-09-24 | 2010-10-07 | Robert Bosch Gmbh | Kraftstoffeinspritzsystem für Brennkraftmaschinen und Verfahren zum Einspritzen von Kraftstoff in den Brennraum einer Brennkraftmaschine |
DE10101358A1 (de) | 2001-01-13 | 2002-07-25 | Bosch Gmbh Robert | Kraftstoffeinspritzeinrichtung |
-
2000
- 2000-05-17 JP JP2000144683A patent/JP2001323858A/ja active Pending
-
2001
- 2001-05-15 EP EP01930154A patent/EP1284357B8/en not_active Expired - Lifetime
- 2001-05-15 US US10/276,559 patent/US6910463B2/en not_active Expired - Fee Related
- 2001-05-15 WO PCT/JP2001/004037 patent/WO2001088364A1/ja active IP Right Grant
- 2001-05-15 DE DE60124533T patent/DE60124533T2/de not_active Expired - Fee Related
- 2001-05-15 KR KR1020027015484A patent/KR100706366B1/ko not_active IP Right Cessation
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6075677U (ja) * | 1983-10-31 | 1985-05-27 | いすゞ自動車株式会社 | 内燃機関の燃料噴射装置 |
JPS64352A (en) * | 1987-06-19 | 1989-01-05 | Nippon Denso Co Ltd | Fuel injector |
JPH0222663U (ja) * | 1988-07-30 | 1990-02-15 | ||
JPH0264752U (ja) * | 1988-11-02 | 1990-05-15 | ||
JPH03272204A (ja) * | 1990-03-22 | 1991-12-03 | Matsushita Electric Ind Co Ltd | 電圧制御発振器 |
JPH07283546A (ja) * | 1994-04-08 | 1995-10-27 | Furukawa Electric Co Ltd:The | 高耐圧大電流配線板 |
JPH11330711A (ja) * | 1998-05-14 | 1999-11-30 | Futaba Corp | 多層基板 |
Non-Patent Citations (1)
Title |
---|
See also references of EP1284357A4 * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2818323A1 (fr) * | 2000-12-20 | 2002-06-21 | Bosch Gmbh Robert | Installation d'injection de carburant |
WO2002093001A1 (de) * | 2001-05-17 | 2002-11-21 | Robert Bosch Gmbh | Kraftstoffeinspritzeinrichtung |
DE10141110A1 (de) * | 2001-08-22 | 2003-03-20 | Bosch Gmbh Robert | Kraftstoffeinspritzvorrichtung für Brennkraftmaschinen |
KR100704567B1 (ko) * | 2004-11-08 | 2007-04-06 | 미츠비시 후소 트럭 앤드 버스 코포레이션 | 커먼레일식 연료분사장치 |
Also Published As
Publication number | Publication date |
---|---|
EP1284357A4 (en) | 2004-09-01 |
JP2001323858A (ja) | 2001-11-22 |
EP1284357B1 (en) | 2006-11-15 |
EP1284357B8 (en) | 2007-01-17 |
EP1284357A1 (en) | 2003-02-19 |
DE60124533D1 (de) | 2006-12-28 |
US6910463B2 (en) | 2005-06-28 |
DE60124533T2 (de) | 2007-06-21 |
US20040069872A1 (en) | 2004-04-15 |
KR20030048377A (ko) | 2003-06-19 |
KR100706366B1 (ko) | 2007-04-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2001088364A1 (fr) | Dispositif d'injection de carburant | |
EP1013920B1 (en) | Electromagnetic system of a fuel injection apparatus and drive circuit of the electromagnetic system therefor | |
US6453875B1 (en) | Fuel injection system which uses a pressure step-up unit | |
US6085991A (en) | Intensified fuel injector having a lateral drain passage | |
EP1688611B1 (de) | Kraftstoffinjektor mit direkter Nadelsteuerung für eine Brennkraftmaschine | |
US8579207B2 (en) | Multiple intensifier injectors with positive needle control and methods of injection | |
US20070007362A1 (en) | Fuel injectors and methods of fuel injection | |
US6786205B2 (en) | Hydraulically intensified high pressure fuel system for common rail application | |
JP2008533387A (ja) | 多気筒型の内燃機関に用いられる燃料噴射装置 | |
JP2004514830A (ja) | 燃料噴射装置 | |
EP0774067A1 (en) | Solenoid actuated miniservo spool valve | |
US6807943B2 (en) | Motor vehicle fuel injection system with a high flow control valve | |
DE60035804T2 (de) | Elektromagnetisch betriebenes brennstoffeinspritzventil | |
KR20020005007A (ko) | 양방향 이중 유압제어장치 | |
US7732946B2 (en) | Current source, control device and method for operating said control device | |
EP1872008A1 (de) | Zweistufig öffnender kraftstoffinjektor | |
JP2003512564A (ja) | 噴射装置及び液体を噴射する方法 | |
EP1876342B1 (en) | Piezo injector and piezo injector system | |
US10883460B2 (en) | Fuel injection device | |
US6292036B1 (en) | Drive circuit | |
JP4306133B2 (ja) | 燃料噴射装置 | |
US20030080201A1 (en) | Injection device and method for injection of fluids | |
WO2006128751A1 (de) | Common-rail-injektor | |
JPH02175364A (ja) | 制動油圧制御装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): KR US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR |
|
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 2001930154 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1020027015484 Country of ref document: KR |
|
WWE | Wipo information: entry into national phase |
Ref document number: 10276559 Country of ref document: US |
|
WWP | Wipo information: published in national office |
Ref document number: 2001930154 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 1020027015484 Country of ref document: KR |
|
WWG | Wipo information: grant in national office |
Ref document number: 2001930154 Country of ref document: EP |