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
  • F02N11/0862—Circuits or control means specially adapted for starting of engines characterised by the electrical power supply means, e.g. battery
• • 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
  • F02N11/00—Starting of engines by means of electric motors
  • F02N11/08—Circuits or control means specially adapted for starting of engines
  • F02N11/0851—Circuits or control means specially adapted for starting of engines characterised by means for controlling the engagement or disengagement between engine and starter, e.g. meshing of pinion and engine gear
• • 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
  • F02N11/0859—Circuits or control means specially adapted for starting of engines specially adapted to the type of the starter motor or integrated into it
• • 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
  • F02N11/10—Safety devices
• • 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
  • F02N2200/00—Parameters used for control of starting apparatus
  • F02N2200/02—Parameters used for control of starting apparatus said parameters being related to the engine
  • F02N2200/023—Engine temperature

Definitions

• the invention relates to a method for operating a starting device with a starter motor for starting an internal combustion engine, in particular a vehicle, wherein the starter motor is switched on and off by applying electrical energy from an electrical energy storage via a starter control with a switching relay.
• the invention relates to a computer program product and to a starter device for an internal combustion engine of a vehicle with a starter motor, an electric energy storage, a switching relay, which is controlled by a starter control and forms an electrical switching contact between the starter motor and the e-lektrischen energy storage.
• the starting device is controlled by a mechanical or an electromechanical control, which may be linked to an electronic control unit.
• a mechanical or an electromechanical control which may be linked to an electronic control unit.
• Such a structure of a starting device is simple.
• the starting device is mounted in a vehicle for starting an internal combustion engine in a partially large temperature range due to seasonal temperature fluctuations. exaggerated. Even when operating with a start-stop system, the temperature operating range is greater than in a pure start with a cold engine.
• DE 102 31 088 A1 describes a switching device for switching on a
• Starter motor with two transistors connected in parallel as a switching device, wherein basically only one transistor operates and means for checking the operation of each transistor are formed. It is an object of the invention to develop a method for operating a starting device, a computer program product and a starting device of the type mentioned above, so that the starting device for starting an internal combustion engine has a longer service life even with a more intensive use.
• the demand profile of the starter motor ie the required power of the starter motor depends on the required spin performance of the internal combustion engine.
• the torque of the engine varies depending on the temperature of the engine mainly due to the viscosity of the engine oil therein. At a normal temperature of, for example, +20 0 C, the torque is smaller than in a cold start of the internal combustion engine.
• the demand profile found means that the required electrical torque output of the starter motor should be higher at low temperatures and low at higher temperatures. Further, the electric power of an electric battery is lowered at low temperatures.
• the object is achieved in that the starter motor in the starting process is regulated by the starter control. It is therefore possible to vary the maximum available power of the starter motor and to reduce wear on a starter pinion, on the ring gear of the internal combustion engine, on abrasive carbon brushes on the commutator, on the bearings and on the contact pieces on the switching relay. In addition, a higher number of switching can be achieved by the starter motor and the starting device as a whole, which is particularly advantageous when using the start-stop systems.
• the starter motor is driven regulated in discrete power levels. It would be possible to control the starter motor variably directly depending on the variably changed engine torque. However, such a variable control is expensive. According to a simple method, therefore, are discrete
• a controller is thus easier and less expensive to implement.
• the starter control queries information about the temperature of the internal combustion engine and the starter motor is controlled in a power-regulated manner as a function of a specific, detected current temperature range of the internal combustion engine.
• the starter motor is controlled by the starter control in three, preferably four, power-regulated stages. Three or four stages are advantageously sufficient to divide the required power or the required power profile of the starter motor into a minimum required power, an increased power, a greatly increased power and a maximum power. Due to this division, the wear on the start - A - gear - involved components are reduced, and the required resources of electrical power are used sparingly and carefully.
• the power stages are time-dependent switched by the controller or starter control in the startup process.
• the starter motor can engage with a small power and drive the engine to start with a stepped power, and after a short start-up time, this power can be increased in time by the starter control.
• the time-dependent connection can be made dependent on or independent of the temperature of the internal combustion engine.
• the time-dependent control can also be adjusted typically specific and be coupled with a self-learning function of the starter control that takes into account and detects aging changes of the starting device in the starting process.
• the object is also solved by a computer program product in that it is loadable in a program memory with program instructions to perform all the steps of a method described above when the computer program product is executed in the starter control.
• the computer program product has the advantage that, for a starting device for starting an internal combustion engine, it can typically be adjusted specifically with parameters and thus a very simple and cost-effective adaptation is possible.
• measured values of existing sensors e.g. be taken into account by one or more temperature sensors or existing timers or processor solutions by means of counters in order to control by means of the starter control the starter motor depending on various parameters and power regulated.
• the object is achieved by a starting device in that the starting device is formed with a power regulating device for the starter motor.
• the power regulation device has the advantage that the electric power of a battery is adapted to the breakdown resistance of the internal combustion engine and thus the total wear of components involved in the starting process is reduced and electrical energy is used sparingly. The life of the starting device thus increases, in particular even with an increased number of cycles or cycles due to a start
• the power regulation device has switchable leads, with defined resistances, which can be switched on and off via the starter control by means of circuit breakers, in particular with switching relays. It is an idea of the invention to provide switchable leads with a resistor, for example, a series resistor, in order to adapt the available power to standing. For switching on and for switching off the supply lines high-performance switches such as electronic switches can be used, preferably electromechanical switching relays are used because these high currents with a long life are easily switchable.
• the resistor may be integrated in a section of the supply line.
• the resistor may alternatively extend over the entire supply line as an increased innoror power resistor.
• the switchable leads are made of a material with a higher resistance than copper.
• the switchable supply lines are preferably made of steel and / or aluminum.
• Steel and aluminum have a higher resistance than copper and are also a less expensive material than copper. Steel is less expensive than aluminum and also has a higher resistance. Both materials are therefore inexpensive overall.
• the switchable leads between the starter motor and the energy storage, in particular the battery, pluspol mone, connected.
• the return line can be formed efficiently short over the vehicle body as in conventional starting devices.
• the switchable leads are connected as a series resistor. Closing several supply lines increases the available electrical power compared with a single outgoing line, because the size of the ohmic resistance in the effective supply line is reduced in total by a parallel connection of resistors.
• the power regulating device may be connected between the starter motor and the negative-pole-side energy store. By means of a plurality of switchable lines with a greater resistance of a more cost-effective material than copper, the power for operating a starter motor can be varied.
• the ground-side mounting is preferably easier to implement, since these lines are normally made simpler, ie there are actually complete lines from the starter to the body or to the battery without interruptions.
• semiconductor switching elements can be controlled as so-called low-side switch in the ground branch slightly easier than high-side switch in the plus branch. In principle, however, there is no difference here either.
• FIG. 1 shows a schematic circuit diagram of a starting device according to a first embodiment
• FIG. 2 is a circuit diagram of a starting device according to a second embodiment
• FIG. 3 is a circuit diagram of a starting device according to a third embodiment
• FIG. 4 shows a schematic circuit diagram of a starter device according to a fourth embodiment
• 5 shows a table of operating states of the starting device
• FIG. 6 shows a flow chart of a sequence of the method according to the invention.
• Fig. 1 shows a starting device 1 with a starter motor 2 and with a between a battery 4 and the starter motor 2 via a Hin effet HO plus pole side switched switching relay 3 at the starter relay is called this engagement relay, both the mechanical Einschfuntkion the pinion and the
• a starter relay on the starter motor 2, which is used for meshing a starter pinion, not shown, comprises the switching relay 3.
• the switching relay 3 is known from the prior art.
• Forward line HO has an ohmic resistance R H o and the negative pole-side return line R from the starter motor 2 to the battery 4 has a resistive line resistance which is referred to simply as R L R.
• the battery 4 has an internal resistance R, 4 .
• the starting device 1 is formed on the positive pole side with a power regulating device 20.
• the power regulation device 20 has at least one switchable supply line 21 parallel to the forward line HO.
• the parallel, switchable supply line 21 has a defined line resistance R ⁇ _m-
• the resistance R L m of the parallel feed line 21 is not limited spatially to a single resistor, but by a suitable material selection, it extends over the entire parallel feed line 21st
• the switchable lead 21 is made with a greater resistance of a less expensive material such as steel or aluminum than the conventional HO lead made of copper.
• Aluminum has a conductivity of 37 m / ⁇ * mm 2 and steel a conductivity of 10 m / ⁇ * mm 2 in contrast to the conductivity of copper with 57 mm // ⁇ ** mmmm 22 ..
• DDiiee ppaarraalllleell sscchhaallttbbaaire supply line 21 is by means of a Circuit breaker 212 on and off.
• the power switch 212 is either an electronic power switch, for example, a MOSFET or an electromechanical switching relay.
• the power switch 212 is controlled by a controller 5 with a CPU 6.
• Controller 5 is formed with a program memory 7 and is available with a Thermal sensor 8 for detecting the temperature of an unannealed internal combustion engine in information contact.
• the CPU 6 is further connected to an electronic clock 9. The controller 5 thus forms a timer together with the CPU 6 and the clock 9.
• FIG. 2 shows a starting device 1 according to FIG. 1 with the difference that the power regulating device 20 does not only comprise a feed line 21 which can be switched in parallel, but at least three parallel feed lines 21, 22, 23 are provided.
• All the parallel supply lines 21, 22, 23 each include a switchable power switch 212, 222, 232, which respectively close the switch contacts S1, S2, S3, if the controller 5 so dictates. Due to three parallel supply lines 21, 22, 23, it is possible to control the starter motor 2 in a larger differentiated range power-regulated with respect to the embodiment of FIG. 1. Thus, a power surplus when meshing and starting the internal combustion engine is avoided. Unnecessarily high wear is prevented at the starter pinion, ring gear, at the bearings, as well as at poles of contact pins in the starter relay due to a regulated power.
• the supply lines 21, 22, 23 are formed with different ohmic resistances, so that by a specific selection of the addition of the parallel supply lines 21, 22, 23 a defined power regulation 20 is executed by the controller 5 to control the starter motor 2 defines.
• FIGS. 3 and 4 each show an alternative embodiment to FIGS. 1 and 2, with the difference that at least one parallel supply line 21 is arranged on the negative pole-side return line R of the starter motor 2 and the battery 4.
• the resistance of the feed lines 21, 22, 23 as return lines, which preferably extends over the entire line as described above, is designated and illustrated in simplified form in FIG. 4 as R LR1, R LR2 and R
• 5 shows a simplified diagram in the form of a table with four temperature ranges 1, 2, 3, 4, in which the internal combustion engine is started by the starting device 1 respectively. In the first temperature range 1., Which is greater than +20 0 C, all the switch contacts S1, S2, S3 of the circuit breakers 212, 222, 232 are open.
• the starter motor 2 is controlled via the conventional supply line HO via a switching relay 3.
• a defined circuit breaker eg 212, 222 or 232 is closed by the controller 5.
• the total resistance of the circuit, so a power network, in the starting device 1 is thus reduced and increases the electrical starter power.
• the starter motor 2 thus copes with an increased engine torque on the internal combustion engine.
• a third temperature range 3 which is set between -10 0 C and 0 0 C, for example, the switching contacts S1 and S2 are closed.
• Switching contact S3 from the circuit breaker 232 has not been closed.
• the starter motor 2 has in this temperature range 3. for optimum start of the engine greatly increased performance.
• a fourth temperature range 4th temperature is less than -10 0 C.
• the power switches 212, 222, 232 are closed with their switch contacts S1, S2 and S3, so that a maximum power from the battery 4 will deliver and the Resistor in the overall circuit of the starting device 1 is the smallest, so that the starter motor 2, a maximum e- lectric power is available to start the engine with an increased engine torque.
• FIG. 6 shows a flow chart with a sequence of method steps which the starter control 5 carries out in order to carry out the method according to the invention.
• a start pulse is detected, for example by pressing a start button or by pressing the ignition key from the controller 5 via an information system, for example via a CAN bus.
• the starting pulse can be detected by releasing a foot brake or by pressing an accelerator pedal.
• a second step S20 the temperature sensor 8 is asked about the current temperature of the internal combustion engine.
• a third step S30 the temperature is evaluated and assigned to a specific temperature range 1, 2, 3 or 4.
• a step S40 it is determined which power switches 212, 222 and / or 232 in the power regulating device 20 are closed and which remain open.
• step S50 the main current path, that is, the forward line HO, is closed by the switching relay 3, so that the starter motor 2 is energized and the internal combustion engine is started.
• step A1 the main current path, that is, the forward line HO, is closed by the switching relay 3, so that the starter motor 2 is energized and the internal combustion engine is started.
• step A1 the main current path, that is, the forward line HO, is closed by the switching relay 3, so that the starter motor 2 is energized and the internal combustion engine is started.
• step A1 whether within a certain time t, the internal combustion engine is started. If this is the case, the switching relay 3 is turned off in step S60 and the starter control 5 returns to the end of the procedure.
• the electric power is increased by connecting a further supply line 21, 22 or 23 via a power switch, so that the starting behavior of the internal combustion engine improves.
• step S80 is as a self-learning function, the new switching combination of
• the individual switches 212, 222 and 232 can be added slowly during a start-up procedure, so that the starter motor 2 does not load the vehicle electrical system with a suddenly very high starting current. The starter current is thus increased at startup stepped.

Landscapes

• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Combined Controls Of Internal Combustion Engines (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=42561145

Family Applications (1)

Country Status (6)

Families Citing this family (3)

Family Cites Families (26)

• 2009
  • 2009-07-01 DE DE102009027407A patent/DE102009027407A1/de not_active Withdrawn
• 2010
  • 2010-05-04 JP JP2012518054A patent/JP2012531558A/ja active Pending
  • 2010-05-04 US US13/381,730 patent/US20120173129A1/en not_active Abandoned
  • 2010-05-04 WO PCT/EP2010/056025 patent/WO2011000612A1/de active Application Filing
  • 2010-05-04 CN CN2010800297499A patent/CN102472228A/zh active Pending
  • 2010-05-04 EP EP10720573A patent/EP2449247A1/de not_active Withdrawn

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events