EP3516203A1 - Starting device equipped with two parallel ntc resistors for an internal combustion engine - Google Patents
Starting device equipped with two parallel ntc resistors for an internal combustion engineInfo
- Publication number
- EP3516203A1 EP3516203A1 EP17746026.8A EP17746026A EP3516203A1 EP 3516203 A1 EP3516203 A1 EP 3516203A1 EP 17746026 A EP17746026 A EP 17746026A EP 3516203 A1 EP3516203 A1 EP 3516203A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ntc
- starting device
- internal combustion
- combustion engine
- ntc resistor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/08—Circuits or control means specially adapted for starting of engines
- F02N11/087—Details of the switching means in starting circuits, e.g. relays or electronic switches
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N15/00—Other power-operated starting apparatus; Component parts, details, or accessories, not provided for in, or of interest apart from groups F02N5/00 - F02N13/00
- F02N15/02—Gearing between starting-engines and started engines; Engagement or disengagement thereof
- F02N15/04—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears
- F02N15/06—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears the toothed gears being moved by axial displacement
- F02N15/067—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears the toothed gears being moved by axial displacement the starter comprising an electro-magnetically actuated lever
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
- H01C7/04—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having negative temperature coefficient
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C1/00—Details
- H01C1/14—Terminals or tapping points or electrodes specially adapted for resistors; Arrangements of terminals or tapping points or electrodes on resistors
- H01C1/1413—Terminals or electrodes formed on resistive elements having negative temperature coefficient
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
- H01H47/02—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay
- H01H2047/025—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay with taking into account of the thermal influences, e.g. change in resistivity of the coil or being adapted to high temperatures
Definitions
- the present invention relates to a starting device for an internal combustion engine of a motor vehicle with an electric machine that is set up to start the internal combustion engine.
- a starting device for an internal combustion engine of a motor vehicle has an electrical machine which is set up to start the internal combustion engine, and an electrical system with a power supply, in which the electric machine and at least one consumer are integrated.
- an NTC resistor arrangement is provided in a circuit as part of the vehicle electrical system, via which a current flows for operating the electric machine.
- this NTC resistor arrangement has at least two NTC resistance elements connected in parallel, which have different heat resistance values at a temperature of 298 K (ie at room temperature).
- NTC-Wderstand also referred to as a thermistor
- thermistor it is a Wderstand or a resistance element, which - in contrast to conventional conductors such as most metals - with increasing temperature has a lower electrical resistance.
- the abbreviation NTC stands for "Negative Temperature Coefficient”.
- NTC resistors are mostly semiconductor materials, some compound semiconductors, and various metallic alloys.
- An NTC resistor can be produced, for example, by film casting or powder sintering.
- neodymium, gadolinium, lanthanum, strontium and iron oxide individually or as a combination of several of these materials, may be mentioned as materials for NTC resistors.
- NTC resistor which serves as a series resistor
- Short circuit current so chosen during the start of the starting of the internal combustion engine, large enough so that voltage dips are reduced or prevented, however, the resistance of the NTC element by the current flow and the concomitant heating then not far enough reduced so that optimal power output of the electric machine can be achieved. If an NTC resistor with a lower electrical resistance is selected, a good power output can be achieved after the short-circuit current, but the resistance is also during the short-circuit current lower, whereby a voltage dip can not be prevented.
- the circuit has such a thermal Wderstands that a voltage drop in the electrical system during a short-circuit current flow when starting the internal combustion engine is so low that at the same time the at least one consumer can be supplied with sufficient for normal operation voltage, and that a Leis- Delivery of the electric machine after the short-circuit current is so large that the starting of the internal combustion engine can be completed.
- the at least two NTC resistors connected in parallel are insulated from each other thermally (as well as possible). In this way, any heat transfer is avoided, which would otherwise lead to a less pronounced difference in heat development over time.
- the thermal resistance of the circuit is preferably determined essentially by the NTC resistor arrangement, materials of contacts of the NTC resistor arrangement, electrical properties of the NTC resistor arrangement and / or materials of contacts of the electrical machine.
- Contact here can be understood as meaning both a stranded wire on the component and a connection means such as solder.
- the at least two NTC resistors of the NTC resistor arrangement are each provided inside or outside the electrical machine. It takes into account the fact that it is not so much the exact arrangement of the NTC resistors in the circuit that counts. Rather, for example, a structurally advantageous arrangement can be selected.
- the thermal connection, in particular the influence of the selected location of the arrangement on the temperature behavior of the NTC resistors can also be taken into account.
- Figure 1 shows schematically a starting device according to the invention in a preferred embodiment as an electrical circuit.
- FIG. 2 shows curves of individual NTC resistors and of an NTC resistor arrangement according to the invention in a preferred embodiment when starting an internal combustion engine.
- FIG. 1 schematically shows a starting device 100 according to the invention in a preferred embodiment as an electrical circuit.
- the starting device 100 has an electrical system 105 into which an electrical machine 110 and a voltage supply 120 designed as a battery are integrated.
- the electric machine 110 is configured to start an internal combustion engine of a motor vehicle, in which the starting device 100 can be integrated.
- the electric machine is referred to in this context as a starter. It is understood that the electric machine must be coupled or coupled for torque transmission to the internal combustion engine.
- the consumer 140 may be an engine control unit configured to drive both the electric machine 110 and the engine (not shown).
- the consumer 141 may be an example of consumers who are usually present in a motor vehicle, such as, for example, further control devices, and in particular also have to or should properly work during starting of the internal combustion engine.
- an internal resistance Rtatt of the battery 120 and a resistance Rßord are shown, the latter being representative of the resistance of the electrical system 105.
- a circuit is referred to as a part of the electrical system 105, in which during operation of the electric machine 1 10 current flows.
- an NTC resistor assembly 130 and a switch 135 are further provided.
- the switch 135 is provided to close the circuit 160 to operate the electric machine 110 to start the engine.
- the switch 135 can be controlled by the control unit of the electric machine 110, that is, for example, by the engine control unit 140.
- the NTC resistor arrangement 130 here has two individual, parallel NTC resistors 131 and 132.
- the NTC-Wderstand 131 at 298 K, ie at room temperature have a lower resistance than the NTC resistor 132.
- the NTC Wderstandsan Aunt could also be arranged between the electric machine 1 10 and the switch 135.
- the switch 135 is typically part of the starter relay and is i.d.R. controlled via pilot control relay.
- the NTC resistor assembly 130 may also be used in the electrical machine 110, i. For example, on or within the housing, can be arranged. As already mentioned, it is also conceivable to separate the two individual NTC-Wderpole spatially further apart.
- FIG. 2 illustrates the characteristics of individual NTC brakes and an NTC resistance arrangement according to the invention in a preferred embodiment when starting an internal combustion engine.
- a resistance R is plotted in m over time t.
- the upper diagram shows the time t in ms and the lower diagram in s.
- Each of Ri and R2 represents a resistance curve for a single NTC resistor, with the R2 value at room temperature being half that of R1.
- the double cross-sectional area can be provided. Since the area inversely enters the Wderstandswert, at the same temperature, the resistance of the larger NTC resistor (R2) is half as large as that of the smaller NTC resistor (R1).
- Elements (R1) falls off much faster than the larger element, below the value of the larger element. This can be explained by the fact that the smaller element is heated more strongly by the current than the larger element due to its initially higher resistance value and its smaller volume. Together with the exponential decrease in the resistance value above the temperature, the lower element has a lower heat resistance value, for example from 6 to 7 ms, than the larger element. In this example, the time of maximum current during startup, ie the maximum current flowing in the circuit, is about 14 ms. At this time, the resistance of the NTC resistor should be as large as possible. The smaller element here already has a lower resistance value (Ri) than the larger element and thus a worse voltage dip characteristic.
- the resistance in the further course of the engine start is also lower, which in itself is desired.
- the larger element has an advantageous resistance value (R2) at the time of the current maximum, but a higher resistance value than desired in the further course of the starting process.
- the Wderstandskurve R3 now describes the Wderstandswert or its course of an NTC-Wderstandsaniser comprising two parallel, individual NTC resistors or elements.
- the resistance curve thus also describes the course of the resistance ratio of the two individual elements.
- one element has a 50% higher heat resistance value than the other element. In other words, the ratio of the two resistance values is 1.5.
- the single element with the lower resistance value is identical to the smaller element according to the resistance curve R1. Two identical elements of this kind connected in parallel would behave exactly like the larger individual element according to the resistance curve R2. Due to the single element with 50% greater resistance, the NTC
- Resistor assembly now a 20% greater Wderstandswert than the larger element according to the resistance curve R2.
- the element with the lower resistance will carry more current and heated or hotter faster than the second element with the larger resistance value.
- the resistance ratio between the two elements already about 5 compared to 1, 5 at room temperature. That is, in the further course of the boot process, the NTC resistor arrangement behaves with the two elements approximately as a small single element. This can also be seen in the course, which is shown in the lower diagram, which describes an entire start course of about 1 s length.
- the small single element has the lowest resistance and the NTC resistor arrangement has only a slightly higher value.
- the decisive factor is that by connecting two slightly different elements in parallel, the NTC resistor arrangement at the beginning of the starting process behaves more like a large element with respect to the voltage dip and at the end more like a small, half as large element with respect to the residual resistance. As a result, it is possible to image both the positive voltage dip characteristics of the large element and the low residual resistance of the small element in an NTC resistor array.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Motor And Converter Starters (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102016218148.3A DE102016218148A1 (en) | 2016-09-21 | 2016-09-21 | Starting device for an internal combustion engine of a motor vehicle |
PCT/EP2017/068382 WO2018054578A1 (en) | 2016-09-21 | 2017-07-20 | Starting device equipped with two parallel ntc resistors for an internal combustion engine |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3516203A1 true EP3516203A1 (en) | 2019-07-31 |
Family
ID=59501410
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17746026.8A Withdrawn EP3516203A1 (en) | 2016-09-21 | 2017-07-20 | Starting device equipped with two parallel ntc resistors for an internal combustion engine |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3516203A1 (en) |
CN (1) | CN109790811B (en) |
DE (1) | DE102016218148A1 (en) |
WO (1) | WO2018054578A1 (en) |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1556377A (en) * | 1967-12-29 | 1969-02-07 | ||
DE4122252A1 (en) | 1990-07-18 | 1992-01-23 | Volkswagen Ag | IC engine starter motor circuit - has NTC resistor in series with starter relay for controlled engagement of pinion |
DE4106247C1 (en) | 1991-02-28 | 1992-04-30 | Robert Bosch Gmbh, 7000 Stuttgart, De | Starter circuit for IC engine - incorporates NTC resistor in parallel with relay to inhibit starting at very low temp. |
DE10317466A1 (en) | 2003-04-16 | 2004-12-09 | Robert Bosch Gmbh | electric motor |
FR2883658B1 (en) * | 2005-03-22 | 2009-04-24 | Schneider Electric Ind Sas | DEVICE FOR SWITCHING A SEQUENTIALLY OPENING ELECTRICAL CIRCUIT |
DE102007036789A1 (en) | 2007-08-03 | 2009-02-05 | Robert Bosch Gmbh | Starting device with temperature compensation |
JP4942803B2 (en) * | 2009-10-28 | 2012-05-30 | 三菱電機株式会社 | Engine starter |
DE102009046796A1 (en) | 2009-11-18 | 2011-05-19 | Robert Bosch Gmbh | Circuit arrangement for starting device for starting internal combustion engine, particularly motor vehicle, has electrical machine, particularly starter motor and current limiting device for current limitation of electrical machine |
DE102011014023B4 (en) * | 2011-03-15 | 2013-08-14 | Auto-Kabel Managementgesellschaft Mbh | Starting current limiting system, method for limiting a starting current and use of a starting current limiting system |
DE102012215338A1 (en) | 2012-08-29 | 2014-03-06 | Robert Bosch Gmbh | Starter for starting combustion engine of vehicle, has switch comprising contact elements that are in contact with switching bridge, and pyroelectric conductor material with electrical resistance in specific range at room temperature |
DE102015225584A1 (en) * | 2015-12-17 | 2017-06-22 | Robert Bosch Gmbh | Starting device for an internal combustion engine |
DE102016215142A1 (en) * | 2016-08-15 | 2018-02-15 | Seg Automotive Germany Gmbh | Starting device for an internal combustion engine of a motor vehicle |
-
2016
- 2016-09-21 DE DE102016218148.3A patent/DE102016218148A1/en not_active Withdrawn
-
2017
- 2017-07-20 EP EP17746026.8A patent/EP3516203A1/en not_active Withdrawn
- 2017-07-20 CN CN201780058009.XA patent/CN109790811B/en not_active Expired - Fee Related
- 2017-07-20 WO PCT/EP2017/068382 patent/WO2018054578A1/en unknown
Also Published As
Publication number | Publication date |
---|---|
CN109790811B (en) | 2021-02-09 |
CN109790811A (en) | 2019-05-21 |
DE102016218148A1 (en) | 2018-03-22 |
WO2018054578A1 (en) | 2018-03-29 |
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Legal Events
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