WO2013183762A1 - 燃料噴射弁 - Google Patents
燃料噴射弁 Download PDFInfo
- Publication number
- WO2013183762A1 WO2013183762A1 PCT/JP2013/065837 JP2013065837W WO2013183762A1 WO 2013183762 A1 WO2013183762 A1 WO 2013183762A1 JP 2013065837 W JP2013065837 W JP 2013065837W WO 2013183762 A1 WO2013183762 A1 WO 2013183762A1
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- WO
- WIPO (PCT)
- Prior art keywords
- fuel injection
- injection valve
- seal holder
- nozzle
- tip seal
- Prior art date
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Classifications
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- 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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/14—Arrangements of injectors with respect to engines; Mounting of injectors
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- 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
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- 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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
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- 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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
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- 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
- F02M2200/247—Pressure sensors
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- 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
- F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
- F02M2200/8084—Fuel injection apparatus manufacture, repair or assembly involving welding or soldering
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- 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
- F02M2200/85—Mounting of fuel injection apparatus
- F02M2200/858—Mounting of fuel injection apparatus sealing arrangements between injector and engine
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- 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
- F02M57/00—Fuel-injectors combined or associated with other devices
- F02M57/005—Fuel-injectors combined or associated with other devices the devices being sensors
Definitions
- the present invention relates to a fuel injection valve used for an internal combustion engine.
- Patent Document 1 An in-cylinder fuel injection valve that supplies fuel directly to a combustion chamber of an internal combustion engine is known (see Patent Document 1).
- an annular seal member is sandwiched between the inner peripheral surface of the fuel injection valve mounting hole and the outer peripheral surface of the nozzle inserted through the fuel injection valve mounting hole. , Combustion gas leakage is prevented.
- the fuel injection valve is a fuel injection valve that directly injects fuel into a cylinder of the internal combustion engine, and a nozzle that is inserted into a fuel injection valve mounting hole formed in the cylinder;
- a cylindrical tip seal holder attached to the nozzle, and an annular seal member attached to the tip seal holder and sealing between the inner peripheral surface of the fuel injection valve mounting hole and the outer peripheral surface of the tip seal holder.
- the tip seal holder may be formed in accordance with the diameter of the fuel injection valve mounting hole, and the same shape nozzle can be mounted on a plurality of types of fuel injection valve mounting holes having different diameters. It is possible to improve the performance.
- 1 is a partially broken side view schematically showing a fuel injection valve according to a first embodiment of the present invention.
- 1 is an external perspective view showing a fuel injection valve according to a first embodiment of the present invention.
- (A) is a schematic cross-sectional view showing the vicinity of the tip of the nozzle, and
- (b) is a cross-sectional view taken along line AA of (a).
- the external appearance perspective view which shows the state before the secondary mold body of a fuel injection valve is shape
- the partially broken perspective view which shows the state before the secondary mold body of a fuel injection valve is shape
- the partially broken side surface schematic diagram which shows the state before the secondary mold body of a fuel injection valve is shape
- (A) is a figure explaining the alignment process of a signal line and a protrusion part
- (b) is a figure explaining the connection process of a signal line and a protrusion part.
- (A) is a figure explaining the adhesion process of a signal wire
- (b) is a figure explaining a secondary molding process.
- the figure which shows typically advancing of the water in the interface of a connector mold body and a secondary mold body.
- the partially broken side surface schematic diagram which shows the fuel injection valve which concerns on the 2nd Embodiment of this invention.
- the external appearance perspective view which shows the state before the secondary mold body of a fuel injection valve is shape
- FIG. 1 is a block diagram showing a configuration of a fuel injection device 100 including a fuel injection valve 101 according to a first embodiment of the present invention.
- the fuel injection device 100 includes an ECU 190 that is a fuel injection control device and a fuel injection valve 101.
- the ECU 190 takes in information such as engine rotation speed, boost pressure, intake air amount, intake air temperature, water temperature, and fuel pressure detected by various sensors, and controls optimal fuel injection adapted to the state of the internal combustion engine (engine). I do.
- the ECU 190 includes an injection amount calculation unit 191 that calculates an optimal injection amount based on the acquired information, and an injection time calculation unit 192 that calculates an injection time based on the calculation result of the injection amount calculation unit 191.
- the drive circuit 195 generates a drive current corresponding to the injection pulse width, energizes the electromagnetic coil 108 disposed on the outer periphery of the fuel injection valve 101 movable valve body 106, and attracts the movable valve body 106 with magnetic force.
- the valve is opened and maintained for a time corresponding to the injection pulse width, and then closed. That is, the fuel injection valve 101 is opened and closed by the electromagnetic force of the electromagnetic coil 108.
- a pressure sensor 160 that detects the pressure in the cylinder (cylinder) is provided at the tip of the fuel injection valve 101.
- a signal detected by the pressure sensor 160 is input to the ECU 190 via the signal processing unit 198.
- the signal processing unit 198 performs analog / digital conversion processing on the signal detected by the pressure sensor 160.
- the configuration of the fuel injection valve 101 will be described with reference to FIGS.
- FIG. 2 is a partially cutaway side view schematically showing the fuel injection valve 101
- FIG. 3 is an external perspective view showing the fuel injection valve 101.
- the fuel injection valve 101 is an electromagnetically driven fuel injection valve that directly injects fuel such as gasoline into a cylinder of an internal combustion engine (engine).
- the fuel injection valve 101 includes a housing (also referred to as a yoke) 109 and a nozzle 104 that is partially press-fitted and fixed to the housing 109.
- a housing also referred to as a yoke
- nozzle 104 that is partially press-fitted and fixed to the housing 109.
- a lower portion in the figure of a long hollow cylindrical core 120 having the inside as a fuel passage is disposed.
- An electromagnetic coil 108 is disposed outside the core 120 inside the housing 109.
- a movable valve element 106 is disposed in the nozzle 104 on the central axis (hereinafter also simply referred to as the central axis X) of the fuel injection valve 101.
- the central axis X the central axis of the fuel injection valve 101.
- a portion of the core 120 that protrudes from the housing 109 is formed with a connector mold body (resin mold) 170 on the outer periphery thereof by a known injection molding method.
- a part of the connector mold body 170 is an overhanging portion 170c extending obliquely upward in the figure from the housing 109, and an end portion thereof is a connector portion 170a.
- the connector mold body 170 holds the pair of excitation external terminals 125 and the sensor external terminals 115 in an insulated state.
- One end of the excitation external terminal 125 is an excitation connection terminal 125b and is located on the connector portion 170a (see FIGS. 2 and 6).
- One end of the sensor external terminal 115 serves as a sensor connection terminal 115b and is located on the connector portion 170a (see FIGS. 2 and 6).
- a wiring 196 for supplying an excitation current to the electromagnetic coil 108 is connected to the excitation connection terminal 125b, and a detection signal detected by the pressure sensor 160 is taken out to the sensor connection terminal 115b.
- a wiring 197 is connected.
- a pressure sensor 160 that detects the pressure in the cylinder is attached to the tip of the nozzle 104, and a signal line 150 is connected to the pressure sensor 160.
- the signal line 150 is covered with a covering material except for an electrical connection portion, and has one end connected to the pressure sensor 160 and the other end connected to the sensor external terminal 115.
- a detection signal detected by the pressure sensor 160 is supplied to the ECU 190 via the signal line 150, the sensor external terminal 115, and the wiring 197.
- the signal line 150 is disposed along the outer peripheral surface of the housing 109 or the nozzle 104 (see FIGS. 2 and 5).
- the signal line 150 is fixed to the outer peripheral surfaces of the housing 109 and the nozzle 104 with an adhesive or the like, and then covered with the housing 109 and the nozzle 104 by a secondary mold body 180 (see FIGS. 2 and 3).
- FIG. 4A is a schematic cross-sectional view showing the vicinity of the tip of the nozzle 104
- FIG. 4B is a cross-sectional view taken along line AA in FIG. 4A.
- the tip seal holder 130 is a cylindrical member, and its central axis coincides with the central axis X of the fuel injection valve 101.
- a groove 131 is provided on the outer peripheral surface of the chip seal holder 130 along the circumferential direction. As shown in FIG. 4A, a chip seal 140 that is an annular seal member is fitted in the groove 131.
- the tip seal holder 130 is press-fitted from the tip of the nozzle 104 and laser-welded at a predetermined position.
- the nozzle 104 is enlarged in diameter at a position away from the tip of the nozzle 104 by a predetermined distance, and a step 149 is provided.
- One end of the tip seal holder 130 is engaged with the step 149.
- the step 149 is formed for positioning the chip seal holder 130.
- the cylinder head 102 has a fuel injection valve mounting hole 103 formed therein.
- the tip seal 140 seals between the inner peripheral surface of the fuel injection valve mounting hole 103 and the outer peripheral surface of the tip seal holder 130.
- the dimension D of the gap 138 between the outer peripheral surface of the tip seal holder 130 closer to the pressure sensor 160 than the groove 131 and the inner peripheral surface of the fuel injection valve mounting hole 103 is set to about 0.2 mm.
- the dimension D of the gap 138 is set to be equal to or smaller than a predetermined dimension, it is possible to prevent the chip seal 140 from being melted due to direct contact of the high-temperature combustion gas with the chip seal 140.
- the insertion groove 132 is formed along the central axis X on the inner peripheral surface of the chip seal holder 130.
- a signal line 150 of the pressure sensor 160 is inserted into a space defined by the insertion groove 132 and the outer peripheral surface of the nozzle 104.
- the signal line 150 is extended from the pressure sensor 160 through the insertion groove 132 to the protruding portion 170c side of the connector mold body 170 along the outer periphery of the nozzle 104 and the housing 109 as shown in FIG.
- the signal line 150 is electrically connected to a protruding portion 115a that protrudes toward the pressure sensor 160 from a slope portion 170b that is a surface of the overhang portion 170c on the pressure sensor 160 side.
- FIG. 5 is an external perspective view, a partially broken perspective view, and a partially broken side schematic view showing a state before the secondary mold body 180 of the fuel injection valve 101 is molded.
- an excitation external terminal 125 and a sensor external terminal 115 are fixed to a connector mold body 170 which is a primary mold body.
- one end of the pair of excitation external terminals 125 is exposed as an excitation connection terminal 125b on the connector portion 170a of the connector mold 170, and one end of the sensor external terminal 115 is connected to the sensor. It is exposed as a terminal 115b.
- the excitation connection terminal 125b and the sensor connection terminal 115b are arranged in a single connector portion 170a, the electrical connection and pressure between the electromagnetic coil 108 and the wiring 196 (see FIG. 1). Electrical connection between the sensor 160 and the wiring 197 (see FIG. 1) can be easily performed.
- the sensor external terminal 115 extends from the sensor connection terminal 115 b along the projecting portion 170 c of the connector mold body 170, and bends toward the pressure sensor 160 in the vicinity of the housing 109. , Extending parallel to the central axis X.
- the sensor external terminal 115 has a projecting portion 115a at the end opposite to the sensor connection terminal 115b.
- the protruding portion 115 a protrudes toward the pressure sensor 160 from the vicinity of the housing 109 on the slope portion 170 b that is the surface on the pressure sensor 160 side of the protruding portion 170 c of the connector mold body 170.
- FIGS. 8 and 9 a connection portion between signal line 150 and sensor external terminal 115 fixed to connector mold body 170 will be described.
- FIG. 8A and FIG. 8B are diagrams for explaining the alignment process and the connection process between the signal line 150 and the protruding portion 115a.
- FIG. 9A is a diagram for explaining an adhesion process between the signal line 150 and the protruding portion 115a
- FIG. 9B is a diagram for explaining a secondary molding process. 8 and 9, the connection portion between the signal line 150 and the protruding portion 115a is shown in an enlarged manner.
- the signal line 150 and the protruding portion 115a are aligned prior to the connection between the signal line 150 and the protruding portion 115a.
- line 150 peels the coating
- the exposed portion 150a where the covering material 150b is not provided is positioned so as to be in contact with the protruding portion 115a.
- the exposed portion 150a of the signal line 150 and the protruding portion 115a of the sensor external terminal 115 are electrically connected by solder 151.
- solder 151 After soldering, as shown in FIG. 9A, a silicon adhesive is applied so as to cover the entire outer periphery of the exposed portion 150a and the protruding portion 115a. The silicon adhesive is also applied to the slope portion 170b of the connector mold body 170. By curing the silicon adhesive, a silicon adhesive layer 152 is formed on the outer periphery of the exposed portion 150a and the protruding portion 115a. The silicon adhesive layer 152 is in close contact with the slope 170b around the protrusion 115a.
- the secondary mold is formed so as to cover the outer periphery of the housing 109 and the nozzle 104 and the base portion of the slope portion 170b of the overhang portion 170c by a known injection molding method.
- the body 180 is molded.
- the signal line 150 bonded to the outer peripheral surfaces of the housing 109 and the nozzle 104, and the connection portion between the signal line 150 and the protruding portion 115 a of the sensor external terminal 115 are covered with the secondary mold body 180.
- the exposed portion 150a of the signal line 150 and the protruding portion 115a of the sensor external terminal 115 are covered with the silicon adhesive layer 152, and the silicon adhesive layer 152 is secondary. Covered by the mold body 180. Since the exposed portion 150a of the signal line 150 and the protruding portion 115a of the sensor external terminal 115 are covered twice, waterproofness is improved.
- FIG. 10A is a view showing a comparative example in which the secondary mold body 980 is formed without forming the silicon adhesive layer 152
- FIG. 10B shows the first embodiment of the present invention.
- FIG. 10 (a) and 10 (b) the progress of water at the interfaces 178 and 978 between the connector mold body 170 and the secondary mold bodies 180 and 980 is schematically shown by arrows.
- Water may enter the engine due to heavy rain. As shown in FIG. 10A, the water adhering to the fuel injection valve 101 flows along the slope portion 170 b of the connector mold body 170 and reaches the interface 978 between the connector mold body 170 and the secondary mold body 980.
- the resin material constituting the secondary mold body 980 may shrink when cured in the mold, and a slight gap may be generated between the secondary mold body 980 and the connector mold body 170. For this reason, water advances from the interface 978 between the connector mold body 170 and the secondary mold body 980 and reaches the protruding portion 115a.
- the silicon bonding The agent layer 152 prevents its progress.
- a gap may also be formed between the silicon adhesive layer 152 and the secondary mold body 180.
- the exposed portion 150 a of the signal line 150 and the sensor external terminal 115 on the path of water traveling through the interface 185 since the protruding portion 115a is not located, water is prevented from adhering to the exposed portion 150a and the protruding portion 115a.
- the fuel injection valve 101 includes a nozzle 104 inserted into a fuel injection valve mounting hole 103 formed in the cylinder head 102, a cylindrical tip seal holder 130 attached to the nozzle 104, and a tip seal holder 130.
- An annular tip seal 140 that is attached and seals between the inner peripheral surface of the fuel injection valve mounting hole 103 and the outer peripheral surface of the tip seal holder 130 is provided. Therefore, by forming the tip seal holder 130 according to the diameter of the fuel injection valve mounting hole 103, the gap between the fuel injection valve 101 and the fuel injection valve mounting hole 103 is closer to the pressure sensor 160 than the tip seal 140.
- the dimension D can be set to a predetermined value or less, and the chip seal 140 can be prevented from melting.
- the tip seal holder 130 may be formed according to the diameter of the fuel injection valve mounting hole 103, and there is no need to form the nozzle 104 according to the diameter of the fuel injection valve mounting hole 103. . For this reason, since the nozzle 104 of the same shape can be attached to a plurality of types of fuel injection valve attachment holes 103 having different diameters, productivity can be improved.
- the nozzle 104 of the fuel injection valve 101 is provided with a step 149 with which one end of the tip seal holder 130 is engaged.
- the tip seal holder 130 can be easily positioned at a predetermined attachment position by press-fitting the tip seal holder 130 until one end of the tip seal holder 130 is engaged with the step 149. Can do. Since the tip seal holder 130 can be easily positioned with respect to the nozzle 104, productivity can be improved and costs can be reduced.
- An insertion groove 132 through which the signal line 150 is inserted is formed on the inner peripheral surface of the chip seal holder 130 along the central axis X of the chip seal holder 130. Therefore, the pressure sensor 160 provided at the tip of the nozzle 104 and the sensor external terminal 115 can be electrically connected without impairing the sealing performance.
- a groove 131 into which the chip seal 140 is fitted is formed along the circumferential direction.
- the chip seal 140 can be easily attached to the chip seal holder 130 by fitting the chip seal 140 into the groove 131. Further, the tip seal 140 is held at a predetermined position by the groove 131, and it is possible to reliably prevent the combustion gas from leaking from the cylinder.
- the protruding portion 115 a of the sensor external terminal 115 and the exposed portion 150 a of the signal line 150 are covered with the silicon adhesive layer 152, and the silicon adhesive layer 152 is covered with the secondary mold body 180. .
- the silicon adhesive layer 152 prevents the water from proceeding.
- the waterproof property of the electrical connection portion between the sensor external terminal 115 and the signal line 150 is improved.
- the fuel injection valve 101 can be easily electrically connected to the outside. it can.
- FIG. 11 is a partially cutaway side view schematically showing the fuel injection valve 201 according to the second embodiment of the present invention.
- FIG. 12 shows a state before the secondary mold body 280 of the fuel injection valve 201 is molded.
- FIG. in the figure the same or corresponding parts as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
- differences from the first embodiment will be described in detail.
- the protruding portion 115a is protruded in parallel to the central axis X of the fuel injection valve 101 from the slope portion 170b which is the pressure sensor 160 side surface of the overhang portion 170c of the connector mold body 170 ( (See FIG. 2).
- the center of the fuel injection valve 201 is formed from the inclined surface portion 270b that is the surface on the pressure sensor 160 side of the protruding portion 270c of the connector mold body 270.
- a convex portion 271 protrudes in parallel with the axis X.
- the convex portion 271 has a flat side portion 271a parallel to the central axis X and a top surface portion 271b orthogonal to the central axis X.
- the protruding portion 115a of the sensor external terminal 115 protrudes from the top surface portion 271b of the convex portion 271 toward the pressure sensor 160 side.
- the same operational effects as those of the first embodiment described above can be obtained. Furthermore, according to the second embodiment, the water from the time when it enters the interface between the secondary mold body 280 and the connector mold body 270, which is the primary mold body, until it reaches the layer 152 of the silicon adhesive. The travel path can be lengthened. For this reason, even if water permeates into the interface between the secondary mold body 280 and the connector mold body 270, the water can be effectively evaporated before the water flows into the silicon adhesive layer 152. Therefore, according to the second embodiment, the waterproof property is further improved as compared with the first embodiment.
- the pressure sensor 160 is described as an example of the state detection unit attached to the tip of the fuel injection valve 101, but the present invention is not limited to this.
- the present invention can also be applied to a case where a thermocouple for measuring the temperature in a cylinder (cylinder) is attached to the tip of the fuel injection valve 101 as a state detection unit.
- the protrusion 271 is provided, and the water progresses from reaching the interface between the connector mold body 270 and the secondary mold body 280 until reaching the silicon adhesive layer 152.
- the path is configured to be long, the shape of the convex portion 271 is not limited to that described above. Proper irregularities may be provided as appropriate to further lengthen the path.
- the insertion groove 132 is formed on the inner peripheral surface of the chip seal holder 130, but the present invention is not limited to this.
- the insertion groove 132 is not provided on the inner peripheral surface of the chip seal holder 130, but the insertion groove is formed along the central axis X on the outer peripheral surface of the nozzle 104.
- a signal line 150 connecting the terminal 115 may be inserted.
- the exposed portion 150a of the signal line 150 and the protruding portion 115a of the sensor external terminal 115 are electrically connected via the solder 151, but the present invention is not limited to this. It is not limited.
- the exposed portion 150a of the signal line 150 and the protruding portion 115a of the sensor external terminal 115 may be electrically connected using a low-temperature sintered bonding material containing a silver sheet and fine metal particles.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
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- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
-第1の実施の形態-
図1は、本発明の第1の実施の形態に係る燃料噴射弁101を備えた燃料噴射装置100の構成を示すブロック図である。燃料噴射装置100は、燃料噴射制御装置であるECU190と、燃料噴射弁101とを備えている。
(1)燃料噴射弁101は、シリンダヘッド102に形成された燃料噴射弁取付孔103に挿入されるノズル104と、ノズル104に取り付けられた円筒状のチップシールホルダ130と、チップシールホルダ130に取り付けられ、燃料噴射弁取付孔103の内周面とチップシールホルダ130の外周面との間をシールする環状のチップシール140とを備える。このため、燃料噴射弁取付孔103の径に応じて、チップシールホルダ130を形成することで、チップシール140よりも圧力センサ160側において、燃料噴射弁101と燃料噴射弁取付孔103との隙間の寸法Dを所定値以下に設定することができ、チップシール140が溶解することを防止することができる。
図11および図12を参照して本発明の第2の実施の形態に係る燃料噴射弁201を説明する。図11は本発明の第2の実施の形態に係る燃料噴射弁201を示す一部破断側面模式図であり、図12は燃料噴射弁201の2次モールド体280が成型される前の状態を示す外観斜視図である。図中、第1の実施の形態と同一もしくは相当部分には同一符号を付し、説明を省略する。以下、第1の実施の形態との相違点について詳しく説明する。
(1)上記した実施の形態では、燃料噴射弁101の先端に取り付ける状態検出部として圧力センサ160を例に説明したが、本発明はこれに限定されない。たとえば、気筒(シリンダ)内の温度を測定する熱電対を状態検出部として燃料噴射弁101の先端に取り付ける場合にも本発明を適用することができる。
日本国特許出願2012年第130923号(2012年6月8日出願)
段差、150 信号線、150a 露出部、150b 被覆材、151 半田、152
シリコン接着剤の層、160 圧力センサ、170 コネクタモールド体、170a コネクタ部、170b 斜面部、170c 張り出し部、178 界面、180 2次モールド体、185 界面、190 ECU、191 噴射量演算部、192 噴射時間演算部、195 駆動回路、196,197 配線、198 信号処理部、201 燃料噴射弁、270 コネクタモールド体、270b 斜面部、270c 張り出し部、271
凸部、271a 平面側部、271b 頂面部、280 2次モールド体、978 界面、980 2次モールド体
Claims (4)
- 燃料を内燃機関の気筒内に直接噴射する燃料噴射弁であって、
前記気筒に形成された燃料噴射弁取付孔に挿入されるノズルと、
前記ノズルに取り付けられた円筒状のチップシールホルダと、
前記チップシールホルダに取り付けられ、前記燃料噴射弁取付孔の内周面と前記チップシールホルダの外周面との間をシールする環状のシール部材とを備える燃料噴射弁。 - 請求項1に記載の燃料噴射弁において、
前記ノズルには、前記チップシールホルダの一端が係合する段差が設けられている燃料噴射弁。 - 請求項1または2に記載の燃料噴射弁において、
前記チップシールホルダの内周面には、前記チップシールホルダの中心軸に沿って溝が形成されている燃料噴射弁。 - 請求項1または2に記載の燃料噴射弁において、
前記チップシールホルダの外周面には、前記シール部材が嵌め込まれる溝が周方向に沿って形成されている燃料噴射弁。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201311002834 DE112013002834T5 (de) | 2012-06-08 | 2013-06-07 | Kraftstoffeinspritzventil |
JP2014520068A JP6030648B2 (ja) | 2012-06-08 | 2013-06-07 | 燃料噴射弁 |
US14/406,064 US9309850B2 (en) | 2012-06-08 | 2013-06-07 | Fuel injection valve |
CN201380030101.7A CN104350274B (zh) | 2012-06-08 | 2013-06-07 | 燃料喷射阀 |
Applications Claiming Priority (2)
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JP2012-130923 | 2012-06-08 | ||
JP2012130923 | 2012-06-08 |
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WO2013183762A1 true WO2013183762A1 (ja) | 2013-12-12 |
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PCT/JP2013/065837 WO2013183762A1 (ja) | 2012-06-08 | 2013-06-07 | 燃料噴射弁 |
Country Status (5)
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US (1) | US9309850B2 (ja) |
JP (1) | JP6030648B2 (ja) |
CN (1) | CN104350274B (ja) |
DE (1) | DE112013002834T5 (ja) |
WO (1) | WO2013183762A1 (ja) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2012115036A1 (ja) * | 2011-02-25 | 2012-08-30 | 本田技研工業株式会社 | 燃料直噴式内燃機関の筒内圧検出装置 |
CN105164401B (zh) * | 2014-04-04 | 2018-07-24 | 本田技研工业株式会社 | 缸内压力检测装置 |
GB201511007D0 (en) * | 2015-06-23 | 2015-08-05 | Delphi Int Operations Lux Srl | Nozzle assembly with adaptive closed signal |
US10041440B2 (en) * | 2015-12-02 | 2018-08-07 | Aaron Di Pietro | Fuel injector insert |
JP2018172972A (ja) * | 2017-03-31 | 2018-11-08 | 本田技研工業株式会社 | 燃料噴射弁の取付構造 |
FR3143687A1 (fr) * | 2022-12-19 | 2024-06-21 | Psa Automobiles Sa | Arrangement d’un moteur thermique et procede de controle d’un tel arrangement |
Citations (5)
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JPH0370863A (ja) * | 1989-08-09 | 1991-03-26 | Japan Electron Control Syst Co Ltd | フューエルインジェクタ |
JPH08319919A (ja) * | 1995-05-19 | 1996-12-03 | Siemens Automot Corp | エアアシスト式インジェクタおよび該インジェクタにおいて用いられる保持スリーブ体 |
JP2001041096A (ja) * | 1999-07-23 | 2001-02-13 | Denso Corp | 燃料噴射ノズル |
JP2001504912A (ja) * | 1997-08-22 | 2001-04-10 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | 燃料噴射弁 |
WO2008114534A1 (ja) * | 2007-03-22 | 2008-09-25 | Hitachi, Ltd. | 燃料噴射弁 |
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US5009390A (en) * | 1990-03-01 | 1991-04-23 | Coltec Industries Inc. | Electromagnet and reed-type valve assembly |
US7104477B2 (en) * | 2001-09-13 | 2006-09-12 | Synerject, Llc | Air assist fuel injector guide assembly |
US7293550B2 (en) * | 2006-01-31 | 2007-11-13 | Gm Global Technology Operations, Inc. | Fuel injector isolation seat |
GB0609519D0 (en) * | 2006-05-12 | 2006-06-21 | Delphi Tech Inc | Fuel injector |
CN201013506Y (zh) * | 2007-02-12 | 2008-01-30 | 潍柴动力股份有限公司 | 柴油机电控喷油器压紧装置 |
JP4491474B2 (ja) | 2007-05-31 | 2010-06-30 | 日立オートモティブシステムズ株式会社 | 燃料噴射弁及びそのストローク調整方法 |
JP5011320B2 (ja) * | 2009-01-30 | 2012-08-29 | 日立オートモティブシステムズ株式会社 | 燃料噴射弁のノズルボディの成形方法 |
JP2011064124A (ja) | 2009-09-17 | 2011-03-31 | Hitachi Automotive Systems Ltd | 燃料噴射弁 |
JP2011220259A (ja) * | 2010-04-12 | 2011-11-04 | Hitachi Automotive Systems Ltd | 電磁式燃料噴射装置 |
-
2013
- 2013-06-07 CN CN201380030101.7A patent/CN104350274B/zh not_active Expired - Fee Related
- 2013-06-07 WO PCT/JP2013/065837 patent/WO2013183762A1/ja active Application Filing
- 2013-06-07 US US14/406,064 patent/US9309850B2/en not_active Expired - Fee Related
- 2013-06-07 JP JP2014520068A patent/JP6030648B2/ja not_active Expired - Fee Related
- 2013-06-07 DE DE201311002834 patent/DE112013002834T5/de not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH0370863A (ja) * | 1989-08-09 | 1991-03-26 | Japan Electron Control Syst Co Ltd | フューエルインジェクタ |
JPH08319919A (ja) * | 1995-05-19 | 1996-12-03 | Siemens Automot Corp | エアアシスト式インジェクタおよび該インジェクタにおいて用いられる保持スリーブ体 |
JP2001504912A (ja) * | 1997-08-22 | 2001-04-10 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | 燃料噴射弁 |
JP2001041096A (ja) * | 1999-07-23 | 2001-02-13 | Denso Corp | 燃料噴射ノズル |
WO2008114534A1 (ja) * | 2007-03-22 | 2008-09-25 | Hitachi, Ltd. | 燃料噴射弁 |
Also Published As
Publication number | Publication date |
---|---|
CN104350274A (zh) | 2015-02-11 |
JPWO2013183762A1 (ja) | 2016-02-01 |
CN104350274B (zh) | 2017-05-31 |
JP6030648B2 (ja) | 2016-11-24 |
US20150115069A1 (en) | 2015-04-30 |
US9309850B2 (en) | 2016-04-12 |
DE112013002834T5 (de) | 2015-03-05 |
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