EP0090984B1 - Internal-combustion engine comprising a central electronic control apparatus - Google Patents

Internal-combustion engine comprising a central electronic control apparatus Download PDF

Info

Publication number
EP0090984B1
EP0090984B1 EP83102687A EP83102687A EP0090984B1 EP 0090984 B1 EP0090984 B1 EP 0090984B1 EP 83102687 A EP83102687 A EP 83102687A EP 83102687 A EP83102687 A EP 83102687A EP 0090984 B1 EP0090984 B1 EP 0090984B1
Authority
EP
European Patent Office
Prior art keywords
temperature
circuit
switch
combustion engine
internal combustion
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.)
Expired
Application number
EP83102687A
Other languages
German (de)
French (fr)
Other versions
EP0090984A3 (en
EP0090984A2 (en
Inventor
Paul John Slezak
Marcel Joseph Paul Emile Durand
Robert Paul Dunlop
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Khd Canada Inc Deutz R & D Devision
Original Assignee
Khd Canada Inc Deutz R & D Devision
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Khd Canada Inc Deutz R & D Devision filed Critical Khd Canada Inc Deutz R & D Devision
Priority to AT83102687T priority Critical patent/ATE30937T1/en
Publication of EP0090984A2 publication Critical patent/EP0090984A2/en
Publication of EP0090984A3 publication Critical patent/EP0090984A3/en
Application granted granted Critical
Publication of EP0090984B1 publication Critical patent/EP0090984B1/en
Expired legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P19/00—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition
    • F02P19/02—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs

Definitions

  • the invention relates to an internal combustion engine according to the preamble of claim 1.
  • Such an internal combustion engine with a control device for controlled heating of the glow plugs is known from DE-A 2 743 509.
  • the control device only includes the heating phase of the glow plugs or the power supply to the glow plugs after the desired glow temperature has been reached.
  • Other influences that are required for smooth operation of a diesel internal combustion engine are not addressed in the known control device.
  • a charge control for a hydrodynamic coupling of a cooling fan which consists of a control device that processes a large number of measured values and which clocks a valve that blocks the inflow to the coupling.
  • the object according to the invention combines the control device for the controlled heating of the glow plugs and a control device for adjusting the speed of the cooling fan to form central electronics with common components.
  • a common pulse generator is used on the one hand via the control device to actuate an interrupter switch in the circuit of the glow plugs and on the other hand via the control device to actuate the valve in the inflow line to the hydrodynamic coupling.
  • the pulses of the pulse generator control the indicator light of the glow system flashing via a monitoring circuit if there are errors detected by the monitoring circuit.
  • the electrical switch is connected to the vehicle electrical system via an electronic switch, the electronic switch in the driving position of the operating switch from a rapid heating circuit for maximum power supply to the glow plugs and a glow circuit for keeping the glow plug temperature constant and in the start position of the operating switch from a compensation circuit to compensate for the voltage drop during the starting process.
  • the glow plug system for example in a multi-cylinder reciprocating internal combustion engine with one glow plug per cylinder, several relays can be provided for actuating the glow plugs. If, for example, a central annealing system, in particular a flame annealing system, is provided, a relay is sufficient. Due to the different control of the electronic switch or switches, almost all important influencing variables can be taken into account. It is therefore advantageously possible to heat up the annealing system as quickly as possible, then to supply it with the necessary power as a function of the battery voltage and to take voltage drops into account when starting the internal combustion engine. These voltage drops can be very significant depending on the temperature and would lead to a reduction in the glow output of the glow system. Furthermore, the compensation of the battery voltage drop counteracts cooling of the glow system by the freshly sucked-in air, which, depending on the outside temperature, triggers a temperature drop at the glow plugs before the reciprocating internal combustion engine actually starts.
  • the rapid heating circuit advantageously has a temperature-dependent resistor (thermistor) for determining the rapid heating time, the rapid heating time being determined automatically as a function of the outside temperature and the battery voltage.
  • the temperature characteristic of the thermistor is adapted to the temperature characteristic of the glow system. This ensures that regardless of the operator, the electronic central control unit automatically determines the rapid heating time for the glow plugs depending on the respective outside temperature and the battery voltage, since the thermistor also reacts to the respective outside temperatures and battery voltage and therefore takes a different amount of time to reach the specified one To achieve temperature or the temperature-dependent change in resistance.
  • the thermistor further ensures that even in the event of an arbitrary interruption of the rapid heating time, for example because the operator switches the operating switch off again and thus briefly interrupts the heating time of the glow system, the interrupted remaining glow time is taken into account and does not lead to incorrect rapid heating of the glow system, since the thermistor, taking into account the temperature characteristic of the glow system, also takes the glow time or the remaining glow energy into account and shortens the renewed rapid heating time accordingly.
  • the glow circuit is advantageously connected to the pulse generator, as a result of which a gate control is formed which varies the pulse width as a function of the battery voltage. This ensures that the glow system is supplied with the correct power according to the battery voltage.
  • a further electronic switch for controlling the relay is provided, which is controlled by a limit temperature circuit which is connected to sensors for detecting influencing variables of the internal combustion engine. Since the glow circuit and the rapid heating circuit are continuously switched on in the driving position of the operating switch, the glow system continues to be operated even after the internal combustion engine has started and is regulated to the desired temperature by the glow circuit in conjunction with the pulse generator. This ensures that the internal combustion engine reaches a more favorable warm-up phase after starting, which eliminates the undesirable "white smoke in direct-injection internal combustion engines". This also results in improved exhaust gas values. If the sensors of the influencing variables, for example the component temperatures of the internal combustion engines, report a predetermined temperature, the power supply to the relay of the glow system is interrupted by the further electronic switch.
  • a circuit for setting the operating points is assigned to each of the sensors, which means that the sensors can be set to the control device. Furthermore, the circuits for setting the operating points in connection with the pulse generator form pulses which control an electronic switch of the electromagnetic directional control valve, the pulse width varying depending on the temperatures of the sensors.
  • the hydraulic drive of the cooling air blower is supplied with hydraulic fluid so that the speed of the cooling air blower is controlled accordingly. The speed has only very slight fluctuations, since the hydrodynamic coupling usually has a constant outflow and the electromagnetic directional valve is arranged in the hydraulic feed line, as a result of which the oil level in the hydrodynamic coupling varies.
  • the pulse width can vary from «zero» to almost «constant».
  • the monitoring circuit controls an electrical switch in the sense of the blinking lighting of the indicator light, which alerts the operator to the error.
  • 1 denotes an air-cooled internal combustion engine which operates on the diesel principle.
  • the internal combustion engine is supplied with cooling air via a cooling air blower designated by 2.
  • a hydrodynamic coupling denoted by 3 is installed, which, not shown in detail, has a constant outflow in a known manner and a hydraulic inlet controlled by an electromagnetic directional valve denoted by 4.
  • the filling quantity of the hydrodynamic coupling is varied or reduced to zero by an increased or reduced inflow, so that the speed of the cooling air fan varies accordingly.
  • the internal combustion engine has one glow plug 5 of a glow system per reciprocating piston unit.
  • the glow plugs 5 are assigned a relay designated 6 as an electrical switch, which is controlled by an electronic central control device designated 7.
  • the electronic central control device 7 also controls the electromagnetic directional valve 4 (FIG. 2).
  • the electronic central control device can be fastened to components of the vehicle both on the reciprocating piston internal combustion engine and, if the reciprocating piston internal combustion engine is arranged on a vehicle.
  • a control lamp designated 8 is connected, which in turn is arranged at a distance from the electronic central control device 7, for example when the reciprocating piston internal combustion engine is installed in a vehicle, in the driver's cab of the vehicle.
  • the electronic central control device 7 is controlled by a stop-drive-start operating switch 9, which is arranged at a location which is easily accessible to the operator, for example in the driver's cab.
  • FIG. 3 which shows the circuit of the electronic central control unit 7, the stop-drive-start operating switch, also designated 9, is shown in more detail, 9a denoting the stop position, 9b denoting the travel position and 9c denoting the start position.
  • the electrical switch (relay 6) is also designed in more detail so that its switching can be recognized.
  • the glow plugs 5, not shown in FIG. 3, are connected to the outputs 10 provided with arrows.
  • the control lamp 8 and the directional valve 4 are drawn into the circuit for the sake of simplicity.
  • the central power supply line 11 is connected to batteries which take over the power supply of the system.
  • a known protective circuit 12 is connected against high voltage peaks, which can occur due to the alternator or by switching the vehicle's consumption on and off.
  • the stop-drive-start operating switch is also connected to the central power supply 11.
  • the driving position 9b is the electromagnetic directional valve 4, the Kon trolleucht 8, as well as a rapid heating circuit 13 for maximum power supply to the glow system, a glow circuit 14 and a voltage-stabilizing power supply 15 for the central control unit 7, with a compensation circuit 16 of the battery voltage drop when the internal combustion engine is connected in addition to an electric starter motor, not shown, connected to the starting position 9c .
  • the outputs 13a of the rapid heating circuit 13, 14a of the glow circuit 14 and 16a of the compensation circuit 16 of the battery voltage drop are connected to an electronic switch 17 and control it separately.
  • the electronic switch 17 is installed in a control line 18 of the relay 6.
  • An electronic switch 19 is installed in the control line 18 in series with the electronic switch 17.
  • the output 13a of the rapid heating circuit 13 is also connected to a switch 20 which is located in a connecting line 21 from the control line 18 to the supply line for the control lamp 8.
  • a triangular voltage generator is designated by 22, which is connected to the glow circuit 14 for the power for supplying the glow system, which results in a gate control which varies the pulse width of the output 14a as a function of the battery voltage change.
  • the rapid heating circuit 13 has a temperature-dependent resistor (thermistor), which is not shown in FIG. 3.
  • the rapid heating time is determined by this thermistor.
  • the output 14a takes over the control of the electronic switch 17, the pulse width varying depending on the battery voltage in such a way that the glow plugs glow almost constantly. If the operator switches the stop-drive-start control switch back to the stop position 9a and then back to the drive position 9b, the circuits 13 and 14 start again, the rapid heating time being determined as a function of the residual temperature detected by the resistance of the thermistor .
  • the switch 20 is switched on, as a result of which the control lamp 8 lights up and gives the operator the information that the glow plugs have not yet reached their intended temperature and that the reciprocating piston internal combustion engine should not be started.
  • the operator can move the stop-drive-start control switch into the start position 9c, whereby the rapid heating circuit 13 and the glow circuit 14 are switched off and a starter motor and the compensation circuit 16 are switched on, the output 16a of which is also the electronic switch 17 controls. Since the battery voltage can drop considerably depending on the outside temperature at which the reciprocating piston internal combustion engine is to be started, the circuit 16 provides the glow system with a power supply such that the glow plugs are kept sufficiently hot. At the same time, it is taken into account that the glow plugs also cool down during the starting process, since cold air is sucked in at the start.
  • sensors 23 and 24 for detecting the cylinder head temperature of the first and last cylinder of a multi-cylinder internal combustion engine, a sensor 25 for detecting the oil temperature of the internal combustion engine and a sensor 26 for detecting the oil temperature of a downstream automatic transmission are provided.
  • the respective highest temperature of the sensors is decisive for the control of the cooling air blower.
  • the output 27a of the pulse width circuit is connected to an electronic switch 28 which controls the electromagnetic directional valve 4.
  • the measuring transducers 23 to 26 are also assigned a monitoring circuit 29, which, since the measuring transducers are designed as sensors with a negative temperature coefficient, generates an output signal when the lines to the measuring transducers break, which actuates the electronic switch 28 and an electronic one designated 30 Controls signal switch, which is arranged in the circuit of the control lamp 8.
  • the electronic central control unit 7 also has a square-wave generator 31 which, in conjunction with the monitoring circuit, forms a flashing circuit 32 which controls the electronic signal switch 30 and thus switches the control lamp 8 as a flashing lamp.
  • a limit temperature circuit designated 33, is also connected, the output of which controls the electronic switch 19, so that when a predetermined temperature of the cylinder heads is reached, the relay 6 is switched off, even if the circuits 13, 14 and 16 operate the electronic switch 17 in the sense of switching on.

Abstract

A reciprocating piston internal combustion engine having a plurality of heads, a glow plug associated with each one of the pistons, a source of DC voltage, and a control for providing heating power to the glow plugs. The engine also has engine oil and transmission oil flowing therethrough, and a fan for cooling the oil. A first switch turns the fan on and off. There is included a central electronic control which includes thermistors for sensing a temperature related to the temperature of the engine and for providing a connection from the source of DC voltage to the glow plugs when the sensed temperature is below a predetermined value and for disconnecting the source when the sensed temperature is above the predetermined value. A duty cycle rate generator alternately connects and disconnects the source of DC voltage to the glow plugs above the preset value at a duty cycle rate which ranges from 0 to 100 percent and which depends on the voltage level of the source of DC voltage. The thermistors are disposed to measure the temperature of the first and eighth heads and the engine and transmission oil, and a second controller controls the first switch to turn the fan on and off depending on the temperature sensed by the temperature sensors. The control includes a second duty cycle rate generator, also ranging from 0 to 100 percent, but dependent on the magnitude of the most significant sensed temperature.

Description

Die Erfindung bezieht sich auf eine Brennkraftmaschine nach dem Oberbegriff des Anspruchs 1.The invention relates to an internal combustion engine according to the preamble of claim 1.

Eine derartige Brennkraftmaschine mit einer Regeleinrichtung zur gesteuerten Aufheizung der Glühstifte ist aus der DE-A 2 743 509 bekannt. Die Regeleinrichtung umfasst jedoch nur die Anheizphase der Glühstifte bzw. die Stromversorgung der Glühstifte nach Erreichen der gewünschten Glühtemperatur. Andere Einflüsse, die für einen reibungslosen Betrieb einer Dieselbrennkraftmaschine erforderlich sind, sind bei der bekannten Regeleinrichtung nicht angesprochen.Such an internal combustion engine with a control device for controlled heating of the glow plugs is known from DE-A 2 743 509. However, the control device only includes the heating phase of the glow plugs or the power supply to the glow plugs after the desired glow temperature has been reached. Other influences that are required for smooth operation of a diesel internal combustion engine are not addressed in the known control device.

Aus der DE-A 2 938 706 ist eine Füllungsregelung für eine hydrodynamische Kupplung eines Kühlgebläses bekannt, die aus einer eine Vielzahl von Messwerten verarbeitenden Steuereinrichtung besteht, die ein den Zufluss zur Kupplung sperrendes Ventil taktend ansteuert.From DE-A 2 938 706, a charge control for a hydrodynamic coupling of a cooling fan is known, which consists of a control device that processes a large number of measured values and which clocks a valve that blocks the inflow to the coupling.

Aus der EP-A 0 035 407 und der US-A 4 307 689 sind ferner Schaltungen zur Temperaturregelung der Glühstifte einer Dieselbrennkraftmaschine bekannt, die eine taktende Aufheizung der Glühstifte bewirken.From EP-A 0 035 407 and US-A 4 307 689 circuits for temperature control of the glow plugs of a diesel internal combustion engine are also known, which cause a clocked heating of the glow plugs.

Mit dem Gegenstand nach der Erfindung wird die Regeleinrichtung zur kontrollierten Aufheizung der Glühstifte und eine Steuereinrichtung zur Drehzahleinstellung des Kühlgebläses zu einer Zentralelektronik mit gemeinsamen Bauteilen zusammengefasst. Ein gemeinsamer Impulsgenerator dient einerseits über die Regeleinrichtung zur Betätigung eines Unterbrecherschalters im Stromkreis der Glühstifte und andererseits über die Steuereinrichtung zur Betätigung des Ventils in der Zuflussleitung zur hydrodynamischen Kupplung. Darüber hinaus steuern die Impulse des Impulsgenerators über eine Überwachungsschaltung die Kontrolleuchte der Glühanlage blinkend an, wenn von der Überwachungsschaltung festgestellte Fehler vorliegen.The object according to the invention combines the control device for the controlled heating of the glow plugs and a control device for adjusting the speed of the cooling fan to form central electronics with common components. A common pulse generator is used on the one hand via the control device to actuate an interrupter switch in the circuit of the glow plugs and on the other hand via the control device to actuate the valve in the inflow line to the hydrodynamic coupling. In addition, the pulses of the pulse generator control the indicator light of the glow system flashing via a monitoring circuit if there are errors detected by the monitoring circuit.

In vorteilhafter Weiterbildung der Erfindung ist der elektrische Schalter über einen elektronischen Schalter mit dem Bordnetz verbunden, wobei der elektronische Schalter in Fahr-Stellung des Bedienungsschalters von einer Schnellheizschaltung zur Maximalstromversorgung der Glühstifte und einer Glühschaltung zur Konstanthaltung der Glühstifttemperatur und in Start-Stellung des Bedienungsschalters von einer Kompensationsschaltung zum Ausgleich des Spannungsabfalls beim Startvorgang angesteuert ist.In an advantageous development of the invention, the electrical switch is connected to the vehicle electrical system via an electronic switch, the electronic switch in the driving position of the operating switch from a rapid heating circuit for maximum power supply to the glow plugs and a glow circuit for keeping the glow plug temperature constant and in the start position of the operating switch from a compensation circuit to compensate for the voltage drop during the starting process.

Je nach Ausgestaltung der Glühanlage, beispielsweise bei einer mehrzylindrigen Hubkolbenbrennkraftmaschine mit je einem Glühstift pro Zylinder, können mehrere Relais zum Ansteuern der Glühstifte vorgesehen sein. Ist beispielsweise eine zentrale Glühanlage, insbesondere Flammglühanlage, vorgesehen, so reicht ein Relais aus. Durch die verschiedenartige Ansteuerung des oder der elektronischen Schalter können nahezu alle wichtigen Einflussgrössen berücksichtigt werden. Es ist daher in vorteilhafter Weise möglich, die Glühanlage möglichst schnell aufzuheizen, anschliessend in Abhängigkeit der Batteriespannung mit der nötigen Leistung zu versorgen und auch Spannungsabfälle beim Starten der Brennkraftmaschine zu berücksichtigen. Diese Spannungsabfälle können je nach Temperatur sehr erheblich sein und würden zu einer Verringerung der Glühleistung der Glühanlage führen. Weiterhin ist durch die Kompensation des Batteriespannungsabfalls einer Auskühlung der Glühanlage durch die frisch angesaugte Luft, die je nach Aussentemperatur vor dem eigentlichen Start der Hubkolbenbrennkraftmaschine einen Temperaturabfall an den Glühstiften auslöst, entgegengewirkt.Depending on the design of the glow plug system, for example in a multi-cylinder reciprocating internal combustion engine with one glow plug per cylinder, several relays can be provided for actuating the glow plugs. If, for example, a central annealing system, in particular a flame annealing system, is provided, a relay is sufficient. Due to the different control of the electronic switch or switches, almost all important influencing variables can be taken into account. It is therefore advantageously possible to heat up the annealing system as quickly as possible, then to supply it with the necessary power as a function of the battery voltage and to take voltage drops into account when starting the internal combustion engine. These voltage drops can be very significant depending on the temperature and would lead to a reduction in the glow output of the glow system. Furthermore, the compensation of the battery voltage drop counteracts cooling of the glow system by the freshly sucked-in air, which, depending on the outside temperature, triggers a temperature drop at the glow plugs before the reciprocating internal combustion engine actually starts.

In vorteilhafter Weise weist die Schnellheizschaltung einen temperaturabhängigen Widerstand (Thermistor) zur Bestimmung der Schnellheizzeit auf, wobei die Schnellheizzeit in Abhängigkeit der Aussentemperatur und der Batteriespannung automatisch bestimmt wird. Die Temperaturkennlinie des Thermistors ist dabei der Temperaturkennlinie der Glühanlage angepasst. Dadurch ist gewährleistet, dass unabhängig von der Bedienungsperson das elektronische Zentralregelgerät in Abhängigkeit der jeweiligen Aussentemperatur und der Batteriespannung selbsttätig die Schnellheizzeit für die Glühstifte bestimmt, da auch der Thermistor auf die jeweiligen Aussentemperaturen und Batteriespannung reagiert und daher eine verschieden lange Zeit benötigt, um die vorgegebene Temperatur bzw. die temperaturabhängige Widerstandsänderung zu erreichen. Durch den Thermistor ist weiterhin gewährleistet, dass auch bei einer willkürlichen Unterbrechung der Schnellheizzeit, beispielsweise weil die Bedienungsperson den Bedienungsschalter wieder ausschaltet und dadurch kurzzeitig die Aufheizzeit der Glühanlage unterbricht, die unterbrochene Restglühzeit mit berücksichtigt wird und nicht zu einer falschen Schnellaufheizung der Glühanlage führt, da der Thermistor unter Berücksichtigung der Temperaturkennlinie der Glühanlage die Glühzeit bzw. die verbliebene Restglühenergie mitberücksichtigt und die erneute Schnellheizzeit entsprechend verkürzt.The rapid heating circuit advantageously has a temperature-dependent resistor (thermistor) for determining the rapid heating time, the rapid heating time being determined automatically as a function of the outside temperature and the battery voltage. The temperature characteristic of the thermistor is adapted to the temperature characteristic of the glow system. This ensures that regardless of the operator, the electronic central control unit automatically determines the rapid heating time for the glow plugs depending on the respective outside temperature and the battery voltage, since the thermistor also reacts to the respective outside temperatures and battery voltage and therefore takes a different amount of time to reach the specified one To achieve temperature or the temperature-dependent change in resistance. The thermistor further ensures that even in the event of an arbitrary interruption of the rapid heating time, for example because the operator switches the operating switch off again and thus briefly interrupts the heating time of the glow system, the interrupted remaining glow time is taken into account and does not lead to incorrect rapid heating of the glow system, since the thermistor, taking into account the temperature characteristic of the glow system, also takes the glow time or the remaining glow energy into account and shortens the renewed rapid heating time accordingly.

Vorteilhaft ist die Glühschaltung mit dem Impulsgenerator verbunden, wodurch eine Anschnittsteuerung gebildet wird, die in Abhängigkeit der Batteriespannung die Impulsbreite variiert. Dadurch ist sichergestellt, dass die Glühanlage entsprechend der Batteriespannung mit der richtigen Leistung versorgt wird.The glow circuit is advantageously connected to the pulse generator, as a result of which a gate control is formed which varies the pulse width as a function of the battery voltage. This ensures that the glow system is supplied with the correct power according to the battery voltage.

In Reihe zu den elektronischen Schaltern der Glühschaltung und der Schnellheizschaltung ist ein weiterer elektronischer Schalter zum Ansteuern des Relais vorgesehen, der von einer Grenztemperaturschaltung gesteuert ist, die mit Messwertgebern zur Erfassung von Einflussgrössen der Brennkraftmaschine verbunden ist. Da nämlich die Glühschaltung und die Schnellheizschaltung in Fahrstellung des Bedienungsschalters dauernd eingeschaltet sind, wird die Glühanlage auch nach dem Start der Brennkraftmaschine weiter betrieben und durch die Glühschaltung in Verbindung mit dem Impulsgenerator auf gewünschte Temperatur geregelt. Dadurch wird erreicht, dass die Brennkraftmaschine nach dem Start eine günstigere Warmlaufphase erreicht, wodurch der unerwünschte «Weissrauch bei Direkteinspritzbrennkraftmaschinen» eliminiert wird. Weiterhin ergeben sich dadurch verbesserte Abgaswerte. Melden die Messwertgeber der Einflussgrössen, beispielsweise der Bauteiltemperaturen der Brennkraftmaschinen, eine vorbestimmte Temperatur, so wird durch den weiteren elektronischen Schalter die Stromversorgung des Relais der Glühanlage unterbrochen.In series with the electronic switches of the glow circuit and the rapid heating circuit, a further electronic switch for controlling the relay is provided, which is controlled by a limit temperature circuit which is connected to sensors for detecting influencing variables of the internal combustion engine. Since the glow circuit and the rapid heating circuit are continuously switched on in the driving position of the operating switch, the glow system continues to be operated even after the internal combustion engine has started and is regulated to the desired temperature by the glow circuit in conjunction with the pulse generator. This ensures that the internal combustion engine reaches a more favorable warm-up phase after starting, which eliminates the undesirable "white smoke in direct-injection internal combustion engines". This also results in improved exhaust gas values. If the sensors of the influencing variables, for example the component temperatures of the internal combustion engines, report a predetermined temperature, the power supply to the relay of the glow system is interrupted by the further electronic switch.

Den Messwertgebern ist jeweils eine Schaltung zur Einstellung der Arbeitspunkte zugeordnet, wodurch die Messwertgeber auf die Steuereinrichtung eingestellt werden können. Weiterhin bilden die Schaltungen zur Einstellung der Arbeitspunkte in Verbindung mit dem Impulsgenerator Impulse, die einen elektronischen Schalter des elektromagnetischen Wegeventils ansteuern, wobei die Impulsbreite in Abhängigkeit der Temperaturen der Messwertgeber variiert. Entsprechend der Impulsbreitenvarianten erfolgt eine laufende Versorgung des hydraulischen Antriebs des Kühlluftgebläses mit Hydraulikflüssigkeit, so dass dadurch eine entsprechende Steuerung der Drehzahl des Kühlluftgebläses erfolgt. Die Drehzahl weist nur ganz geringe Schwankungen auf, da die hydrodynamische Kupplung üblicherweise einen Konstantabfluss hat und das elektromagnetische Wegeventil in der Hydraulikzulaufleitung angeordnet ist, wodurch der Ölstand in der hydrodynamischen Kupplung variiert. Je nach Werten der Messwertgeber kann daher die Impulsbreite von «Null» bis nahezu «konstant» variieren. Die Überwachungsschaltung steuert bei Bruch der Leitungen zu den Messwertgebern einen elektrischen Schalter im Sinne des blinkenden Aufleuchtens der Kontrollleuchte an, wodurch die Bedienungsperson auf den Fehler aufmerksam gemacht wird.A circuit for setting the operating points is assigned to each of the sensors, which means that the sensors can be set to the control device. Furthermore, the circuits for setting the operating points in connection with the pulse generator form pulses which control an electronic switch of the electromagnetic directional control valve, the pulse width varying depending on the temperatures of the sensors. According to the pulse width variants, the hydraulic drive of the cooling air blower is supplied with hydraulic fluid so that the speed of the cooling air blower is controlled accordingly. The speed has only very slight fluctuations, since the hydrodynamic coupling usually has a constant outflow and the electromagnetic directional valve is arranged in the hydraulic feed line, as a result of which the oil level in the hydrodynamic coupling varies. Depending on the values of the sensors, the pulse width can vary from «zero» to almost «constant». In the event of a break in the lines to the sensors, the monitoring circuit controls an electrical switch in the sense of the blinking lighting of the indicator light, which alerts the operator to the error.

Weiterhin ist es in vorteilhafter Weise möglich, die Messwertgeber der Einflussgrössen der Brennkraftmaschine oder der mit ihr verbundenen Maschinen sowohl der Steuereinrichtung für das Kühlluftgebläse als auch der Regeleinrichtung der Glühanlage zuzuordnen. Als Einflussgrössen kommen Bauteiltemperaturen der Brennkraftmaschine, Betriebsmitteltemperaturen der Brennkraftmaschine und der nachgeordneten Maschinen, beispielsweise eines Getriebes, in Frage. Weiterhin ist es möglich, Umgebungstemperaturen und damit die Temperatur der von der Brennkraftmaschine oder vom Kühlluftgebläse angesaugten Luft zu messen bzw. auch die Temperatur der heissen Kühlluft bzw. der Abgase zu ermitteln.Furthermore, it is advantageously possible to assign the sensors of the influencing variables of the internal combustion engine or of the machines connected to it both to the control device for the cooling air fan and to the control device of the glow system. Component temperatures of the internal combustion engine, operating medium temperatures of the internal combustion engine and the downstream machines, for example a transmission, come into consideration as influencing variables. Furthermore, it is possible to measure ambient temperatures and thus the temperature of the air drawn in by the internal combustion engine or by the cooling air blower or to determine the temperature of the hot cooling air or the exhaust gases.

Zur weiteren Erläuterung der Erfindung wird auf die Zeichnung verwiesen, in der ein Ausführungsbeispiel der Erfindung vereinfacht dargestellt ist. Es zeigen:

  • Fig. 1 eine Frontansicht einer Hubkolbenbrennkraftmaschine mit elektronischem Zentralregelgerät,
  • Fig. 2 einen Teillängsschnitt durch die Hubkolbenbrennkraftmaschine nach Fig. 1 und
  • Fig. 3 ein Schaltschema des elektronischen Zentralregelgeräts, welches in den Fig. 1 und 2 nur angedeutet ist.
To further explain the invention, reference is made to the drawing, in which an embodiment of the invention is shown in simplified form. Show it:
  • 1 is a front view of a reciprocating piston internal combustion engine with an electronic central control device,
  • Fig. 2 is a partial longitudinal section through the reciprocating internal combustion engine according to Fig. 1 and
  • Fig. 3 is a circuit diagram of the electronic central control device, which is only indicated in Figs. 1 and 2.

In den Fig. 1 und 2 ist mit 1 eine luftgekühlte Brennkraftmaschine bezeichnet, die nach dem Dieselprinzip arbeitet. Die Brennkraftmaschine wird über ein mit 2 bezeichnetes Kühlluftgebläse mit Kühlluft versorgt. Im Antrieb des Kühlluftgebläses ist eine mit 3 bezeichnete hydrodynamische Kupplung eingebaut, die nicht näher dargestellt in bekannter Weise einen Konstantabfluss und eine von einem mit 4 bezeichneten elektromagnetischen Wegeventil beherrschten Hydraulikzulauf aufweist. Durch erhöhten bzw. verminderten Zulauf wird die Füllungsmenge der hydrodynamischen Kupplung variiert bzw. auf Null abgesenkt, so dass die Drehzahl des Kühlluftgebläses entsprechend variiert. Die Brennkraftmaschine weist pro Hubkolbeneinheit je einen Glühstift 5 einer Glühanlage auf. Den Glühstiften 5 ist ein mit 6 bezeichnetes Relais als elektrischer Schalter zugeordnet, das von einem mit 7 bezeichneten elektronischen Zentralregelgerät gesteuert ist. Das elektronische Zentralregelgerät 7 steuert auch das elektromagnetische Wegeventil 4 (Fig. 2). Das elektronische Zentralregelgerät kann sowohl an der Hubkolbenbrennkraftmaschine als auch, wenn die Hubkolbenbrennkraftmaschine an einem Fahrzeug angeordnet ist, an Bauteilen des Fahrzeuges befestigt sein. Am elektronischen Zentralregelgerät 7 ist eine mit 8 bezeichnete Kontrolleuchte angeschlossen, die wiederum mit Abstand zum elektronischen Zentralregelgerät 7, beispielsweise bei Einbau der Hubkolbenbrennkraftmaschine in einem Fahrzeug, im Fahrerhaus des Fahrzeugs angeordnet ist. Das elektronische Zentralregelgerät 7 wird von einem Stop-Fahr-Start-Bedienungsschalter 9 beherrscht, der an einer für die Bedienungsperson gut zugänglichen Stelle, beispielsweise im Fahrerhaus, angeordnet ist.1 and 2, 1 denotes an air-cooled internal combustion engine which operates on the diesel principle. The internal combustion engine is supplied with cooling air via a cooling air blower designated by 2. In the drive of the cooling air blower, a hydrodynamic coupling denoted by 3 is installed, which, not shown in detail, has a constant outflow in a known manner and a hydraulic inlet controlled by an electromagnetic directional valve denoted by 4. The filling quantity of the hydrodynamic coupling is varied or reduced to zero by an increased or reduced inflow, so that the speed of the cooling air fan varies accordingly. The internal combustion engine has one glow plug 5 of a glow system per reciprocating piston unit. The glow plugs 5 are assigned a relay designated 6 as an electrical switch, which is controlled by an electronic central control device designated 7. The electronic central control device 7 also controls the electromagnetic directional valve 4 (FIG. 2). The electronic central control device can be fastened to components of the vehicle both on the reciprocating piston internal combustion engine and, if the reciprocating piston internal combustion engine is arranged on a vehicle. At the electronic central control device 7, a control lamp designated 8 is connected, which in turn is arranged at a distance from the electronic central control device 7, for example when the reciprocating piston internal combustion engine is installed in a vehicle, in the driver's cab of the vehicle. The electronic central control device 7 is controlled by a stop-drive-start operating switch 9, which is arranged at a location which is easily accessible to the operator, for example in the driver's cab.

In Fig. 3, welche die Schaltung des elektronischen Zentralregelgeräts 7 zeigt, ist der ebenfalls mit 9 bezeichnete Stop-Fahr-Start-Bedienungsschalter näher ausgeführt, wobei 9a die Stopstellung, 9b die Fahrtstellung und 9c die Startstellung bezeichnen. Der elektrische Schalter (Relais 6) ist ebenfalls näher ausgeführt, so dass deren Schaltung erkennbar ist. An den mit Pfeilen versehenen Ausgängen 10 sind die in Fig. 3 nicht dargestellten Glühstifte 5 angeschlossen. Die Kontrolleuchte 8 und das Wegeventil 4 sind der Einfachheit halber in die Schaltung eingezeichnet. Die zentrale Stromzufuhrleitung 11 ist an Batterien angeschlossen, die die Stromversorgung der Anlage übernehmen. An diese zentrale Stromzufuhr 11, die ohne Unterbrechung auch zu dem Relais 6 führt, ist eine an sich bekannte Schutzschaltung 12 gegen hohe Spannungsspitzen angeschlossen, die durch die Lichtmaschine oder durch Ein- und Ausschalten von Verbrauchen des Fahrzeuges eintreten können. Der Stop-Fahr-Start-Bedienungsschalter ist ebenfalls an die zentrale Stromzufuhr 11 angeschlossen. Mit der Fahrstellung 9b ist das elektromagnetische Wegeventil 4, die Kontrolleuchte 8, sowie eine Schnellheizschaltung 13 zur Maximalstromversorgung der Glühanlage, eine Glühschaltung 14 und eine spannungsstabilisierende Stromversorgung 15 für das Zentralregelgerät 7 verbunden, wobei an die Startstellung 9c zusätzlich zu einem nicht dargestellten elektrischen Anlassermotor auch eine Kompensationsschaltung 16 des Batteriespannungsabfalls beim Starten der Brennkraftmaschine angeschlossen ist. Die Ausgänge 13a der Schnellheizschaltung 13, 14a der Glühschaltung 14 und 16a der Kompensationsschaltung 16 des Batteriespannungsabfalls sind mit einem elektronischen Schalter 17 verbunden und steuern diesen getrennt an. Der elektronische Schalter 17 ist in einer Ansteuerleitung 18 des Relais 6 eingebaut. In Reihe zu dem elektronischen Schalter 17 ist ein elektronischer Ausschalter 19 in die Ansteuerleitung 18 eingebaut. Der Ausgang 13a der Schnellheizschaltung 13 ist weiterhin mit einem Schalter 20 verbunden, der in einer Verbindungsleitung 21 von der Ansteuerleitung 18 zur Versorgungsleitung der Kontrolleuchte 8 liegt. Mit 22 ist ein Dreieckspannungsgenerator bezeichnet, der mit der Glühschaltung 14 für die Leistung zur Versorgung der Glühanlage verbunden ist, wodurch eine Anschnittsteuerung entsteht, die in Abhängigkeit der Batteriespannungsänderung die Impulsbreite des Ausgangs 14a variiert.3, which shows the circuit of the electronic central control unit 7, the stop-drive-start operating switch, also designated 9, is shown in more detail, 9a denoting the stop position, 9b denoting the travel position and 9c denoting the start position. The electrical switch (relay 6) is also designed in more detail so that its switching can be recognized. The glow plugs 5, not shown in FIG. 3, are connected to the outputs 10 provided with arrows. The control lamp 8 and the directional valve 4 are drawn into the circuit for the sake of simplicity. The central power supply line 11 is connected to batteries which take over the power supply of the system. To this central power supply 11, which also leads to the relay 6 without interruption, a known protective circuit 12 is connected against high voltage peaks, which can occur due to the alternator or by switching the vehicle's consumption on and off. The stop-drive-start operating switch is also connected to the central power supply 11. With the driving position 9b is the electromagnetic directional valve 4, the Kon trolleucht 8, as well as a rapid heating circuit 13 for maximum power supply to the glow system, a glow circuit 14 and a voltage-stabilizing power supply 15 for the central control unit 7, with a compensation circuit 16 of the battery voltage drop when the internal combustion engine is connected in addition to an electric starter motor, not shown, connected to the starting position 9c . The outputs 13a of the rapid heating circuit 13, 14a of the glow circuit 14 and 16a of the compensation circuit 16 of the battery voltage drop are connected to an electronic switch 17 and control it separately. The electronic switch 17 is installed in a control line 18 of the relay 6. An electronic switch 19 is installed in the control line 18 in series with the electronic switch 17. The output 13a of the rapid heating circuit 13 is also connected to a switch 20 which is located in a connecting line 21 from the control line 18 to the supply line for the control lamp 8. A triangular voltage generator is designated by 22, which is connected to the glow circuit 14 for the power for supplying the glow system, which results in a gate control which varies the pulse width of the output 14a as a function of the battery voltage change.

Wird der Stop-Fahr-Start-Bedienungsschalter 9 in die Fahrstellung 9b bewegt, so werden u.a. gleichzeitig die Schnellheizschaltung 13 und die Glühschaltung 14 eingeschaltet. Beide Schaltungen steuern den elektronischen Schalter 17 zum Einschalten des Relais 6 an, wobei jedoch, da die Schnellheizschaltung 13 ein konstantes Signal abgibt, dieses überwiegt. Die Schnellheizschaltung 13 weist einen temperaturabhängigen Widerstand (Thermistor) auf, der in Fig. 3 nicht dargestellt ist.If the stop-drive-start operating switch 9 is moved into the driving position 9b, i.a. the rapid heating circuit 13 and the glow circuit 14 are simultaneously switched on. Both circuits control the electronic switch 17 to switch on the relay 6, but since the rapid heating circuit 13 emits a constant signal, this predominates. The rapid heating circuit 13 has a temperature-dependent resistor (thermistor), which is not shown in FIG. 3.

Durch diesen Thermistor ist die Schnellheizzeit bestimmt. Ist diese Schnellheizzeit beendet, so übernimmt der Ausgang 14a die Steuerung des elektronischen Schalters 17, wobei in Abhängigkeit der Batteriespannung die Impulsbreite so variiert, dass die Glühstifte nahezu konstant glühen. Schaltet die Bedienungsperson den Stop-Fahr-Start-Bedienungsschalter wieder in die Stopstellung 9a zurück und anschliessend wieder in die Fahrstellung 9b, so setzen die Schaltungen 13 und 14 wieder ein, wobei die Schnellheizzeit in Abhängigkeit der über den Widerstand des Thermistors erfassten Resttemperatur ermittelt wird. Gleichzeitig mit dem Dauerausgangssignal der Schnellheizschaltung 13 wird der Schalter 20 eingeschaltet, wodurch die Kontrolleuchte 8 aufleuchtet und der Bedienungsperson den Hinweis gibt, dass die Glühstifte noch nicht ihre vorgesehene Temperatur erreicht haben und ein Starten der Hubkolbenbrennkraftmaschine nicht erfolgen soll. Ist die Kontrolleuchte 8 erloschen, so kann die Bedienungsperson den Stop-Fahr-Start-Bedienungsschalter in die Startstellung 9c bewegen, wodurch die Schnellheizschaltung 13 und die Glühschaltung 14 ausgeschaltet und ein Startermotor sowie die Kompensationsschaltung 16 eingeschaltet werden, deren Ausgang 16a ebenfalls den elektronischen Schalter 17 ansteuert. Da die Batteriespannung je nach Aussentemperatur, bei der die Hubkolbenbrennkraftmaschine gestartet werden soll, erheblich absinken kann, erfolgt durch die Schaltung 16 eine solche Leistungsversorgung der Glühanlage, dass die Glühstifte ausreichend heiss gehalten werden. Dabei wird gleichzeitig berücksichtigt, dass die Glühstifte beim Startvorgang zusätzlich auskühlen, da beim Start kalte Luft angesaugt wird.The rapid heating time is determined by this thermistor. When this rapid heating time has ended, the output 14a takes over the control of the electronic switch 17, the pulse width varying depending on the battery voltage in such a way that the glow plugs glow almost constantly. If the operator switches the stop-drive-start control switch back to the stop position 9a and then back to the drive position 9b, the circuits 13 and 14 start again, the rapid heating time being determined as a function of the residual temperature detected by the resistance of the thermistor . Simultaneously with the continuous output signal of the rapid heating circuit 13, the switch 20 is switched on, as a result of which the control lamp 8 lights up and gives the operator the information that the glow plugs have not yet reached their intended temperature and that the reciprocating piston internal combustion engine should not be started. If the control lamp 8 has gone out, the operator can move the stop-drive-start control switch into the start position 9c, whereby the rapid heating circuit 13 and the glow circuit 14 are switched off and a starter motor and the compensation circuit 16 are switched on, the output 16a of which is also the electronic switch 17 controls. Since the battery voltage can drop considerably depending on the outside temperature at which the reciprocating piston internal combustion engine is to be started, the circuit 16 provides the glow system with a power supply such that the glow plugs are kept sufficiently hot. At the same time, it is taken into account that the glow plugs also cool down during the starting process, since cold air is sucked in at the start.

In Fig. 3 sind Messwertgeber 23 und 24 zur Erfassung der Zylinderkopftemperatur des ersten und letzten Zylinders einer mehrzylindrigen Brennkraftmaschine, ein Messwertgeber 25 zur Erfassung der Öltemperatur der Brennkraftmaschine und ein Messwertgeber 26 zur Erfassung der Öltemperatur eines nachgeschalteten automatischen Getriebes vorgesehen. An die Messwertgeber sind mit 23a, 24a, 25a und 26a bezeichnete Schaltungen zur Einstellung der Arbeitspunkte angeschlossen, die in Verbindung mit dem Dreieckspannungsgenerator 22 eine Impulsbreitenschaltung 27 bilden, wobei die Impulsbreitenschaltung 27 die Impulsbreite bestimmt, die der jeweilig höchsten Temperatur der Messwertgeber zugeordnet ist. Die jeweilig höchste Temperatur der Messwertgeber ist massgebend für die Ansteuerung des Kühlluftgebläses. Der Ausgang 27a der Impulsbreitenschaltung ist mit einem elektronischen Einschalter 28 verbunden, der das elektromagnetische Wegeventil 4 ansteuert. Den Messwertgebern 23 bis 26 ist weiterhin eine mit 29 bezeichnete Überwachungsschaltung zugeordnet, die, da die Messwertgeber als Sensoren mit negativem Temperaturkoeffizienten ausgebildet sind, bei Bruch der Leitungen zu den Messwertgebern ein Ausgangssignal erzeugt, das den elektronischen Einschalter 28 betätigt und einen mit 30 bezeichneten elektronischen Signalschalter ansteuert, der im Stromkreis der Kontrolleuchte 8 angeordnet ist. Das elektronische Zentralregelgerät 7 weist weiterhin einen Rechteckgenerator 31 auf, der in Verbindung mit der Überwachungsschaltung eine Blinkschaltung 32 bildet, die den elektronischen Signalschalter 30 ansteuert und damit die Kontrolleuchte 8 als Blinkleuchte schaltet. Mit den Messwertgebern 23 und 24 für die Zylinderkopftemperatur ist weiterhin eine mit 33 bezeichnete Grenztemperaturschaltung verbunden, deren Ausgang den elektronischen Ausschalter 19 steuert, so dass bei Erreichen einer vorgegebenen Temperatur der Zylinderköpfe das Relais 6 übersteuernd ausgeschaltet wird, auch wenn die Schaltungen 13, 14 und 16 den elektronischen Schalter 17 im Sinne einer Einschaltung betätigen.In Fig. 3, sensors 23 and 24 for detecting the cylinder head temperature of the first and last cylinder of a multi-cylinder internal combustion engine, a sensor 25 for detecting the oil temperature of the internal combustion engine and a sensor 26 for detecting the oil temperature of a downstream automatic transmission are provided. Connected to the transducers are circuits 23a, 24a, 25a and 26a for setting the operating points, which in conjunction with the delta voltage generator 22 form a pulse width circuit 27, the pulse width circuit 27 determining the pulse width which is assigned to the respective highest temperature of the transducers. The respective highest temperature of the sensors is decisive for the control of the cooling air blower. The output 27a of the pulse width circuit is connected to an electronic switch 28 which controls the electromagnetic directional valve 4. The measuring transducers 23 to 26 are also assigned a monitoring circuit 29, which, since the measuring transducers are designed as sensors with a negative temperature coefficient, generates an output signal when the lines to the measuring transducers break, which actuates the electronic switch 28 and an electronic one designated 30 Controls signal switch, which is arranged in the circuit of the control lamp 8. The electronic central control unit 7 also has a square-wave generator 31 which, in conjunction with the monitoring circuit, forms a flashing circuit 32 which controls the electronic signal switch 30 and thus switches the control lamp 8 as a flashing lamp. With the transducers 23 and 24 for the cylinder head temperature, a limit temperature circuit, designated 33, is also connected, the output of which controls the electronic switch 19, so that when a predetermined temperature of the cylinder heads is reached, the relay 6 is switched off, even if the circuits 13, 14 and 16 operate the electronic switch 17 in the sense of switching on.

Dadurch, dass das elektromagnetische Wegeventil nur in der Fahrstellung eingeschaltet ist, wird erreicht, dass nicht bereits während des Startvorganges die hydrodynamische Kupplung mit Öl gefüllt wird, wodurch eine unnötige Erhöhung der Startleistung für den Starter eintreten würde und darüber hinaus eine unerwünschte Kühlung bei kalter Maschine.The fact that the electromagnetic directional control valve is only switched on in the driving position ensures that the hydrodynamic clutch is not filled with oil during the starting process, which would result in an unnecessary increase in the starting power for the starter and, in addition, undesirable cooling when the machine is cold .

Claims (7)

1. An internal combustion engine, especially a diesel engine (1), including a respective glow plug (5) for the or each of the engine's cylinders, in which for the purpose of being heated up current is feedable from the engine's electric power supply system to the glow plug or plugs which are connectable to the system via an electric switch (6) controlled by a regulating system, in which the regulating system during a first stage - corresponding to the time required for the or each glow plug to reach a predetermined temperature - closes the switch (6) and during a second stage - starting when said temperature has been reached - intermittently actuates the switch (6), in which the regulating system is connected to a stop-drive- start control switch (9) and includes a pulse generator (22) the output pulses of which are used for actuating the switch (6) of the glow plug or plugs (5), and in which the regulating system is also connected to a pilot light (8) which is actuated by the regulating system so as to be permanently lit throughout the first stage but to be extinguished during the second stage, characterized by a central regulator (7) which is a combination of the regulating system with a control system, in which the control system serves to control the rotational speed of the engine's cooling-air fan (2) which is driven via a hydraulic coupling (3), in which hydraulic oil is fed through an electromagnetic valve (4) to the coupling (3), in which the valve (4) is actuated in dependence on operational parameters of the engine (1) by intermittent pulses of the control system, and in which the pulses of the pulse generator (22) are fed:
a) to the regulating system controlling the electric switch (6),
b) to the control system serving to actuate the valve (4) of the hydraulic coupling, and also,
c) in the event of any malfunction of the central regulator, via a monitoring circuit to the pilot light which as a result of any pulses fed thereto is flashingly lit.
2. An internal combustion engine according to claim 1, characterized in that the electric switch (6) is connected via an electronic switch (17) to the engine's electric power supply system, and in that the electronic switch (17) is actuated:
a) - if the control switch (9) is in the drive position - by
(i) a rapid heating circuit (13) for ensuring maximum current supply to the glow plug or plugs (5), and by
(ii) a glow circuit (14) for stabilizing the temperature of the glow plug or plugs; and
b) - if the control switch (9) is in the start position - by a compensating circuit (16) for balancing any voltage drop occurring during starting.
3. An internal combustion engine according to claim 2, characterized in that the rapid heating circuit (13) includes a temperature-sensitive resistor (thermistor) serving to determine the rapid heating period, and in that the resistor's temperature characteristic matches that of the glow plug or plugs (5).
4. An internal combustion engine according to claim 2 or claim 3, characterized in that the glow circuit (14) for stabilizing the temperature of the glow plug or plugs is connected to the pulse generator (22) and forms a phase-angle control which in dependence on the battery voltage varies the width of the pulses transmitted to the electronic switch (17).
5. An internal combustion engine according to any of the claims 2 to 4, characterized in that an electronic circuit-breaker (19) is series-connected to the electronic switch (17), and in that the circuit-breaker is controlled by a temperature-limiting circuit (33) connected to sensors (23, 24) serving to detect the engine's (1) operational parameters.
6. An internal combustion engine according to any of the claims 1 to 5, characterized in that the control system includes a pulse-width modulating circuit (27) connected to the pulse generator (22) and to the sensors (23 to 26) serving to detect the engine's different temperatures, that each sensor is connected to a respective associated circuit (23a to 26a) for setting respective operating points, and in that the pulse width of the output signals, which actuate an electric switch (28) serving to actuate the valve (4), is variable in dependence on the signals of the sensors (23 to 26).
7. An internal combustion engine according to any of the claims 1 to 6, characterized in that at least some of the sensors (23 to 26) for detecting the engine's operational parameters are associated with both the control system and the regulating system.
EP83102687A 1982-04-03 1983-03-18 Internal-combustion engine comprising a central electronic control apparatus Expired EP0090984B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83102687T ATE30937T1 (en) 1982-04-03 1983-03-18 RECIPROCATING ENGINE WITH AN ELECTRONIC CENTRAL CONTROL UNIT.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823212504 DE3212504A1 (en) 1982-04-03 1982-04-03 PISTON PISTON COMBUSTION ENGINE WITH AN ELECTRONIC CENTRAL CONTROL UNIT
DE3212504 1982-04-03

Publications (3)

Publication Number Publication Date
EP0090984A2 EP0090984A2 (en) 1983-10-12
EP0090984A3 EP0090984A3 (en) 1984-04-11
EP0090984B1 true EP0090984B1 (en) 1987-11-19

Family

ID=6160200

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83102687A Expired EP0090984B1 (en) 1982-04-03 1983-03-18 Internal-combustion engine comprising a central electronic control apparatus

Country Status (7)

Country Link
US (1) US4487169A (en)
EP (1) EP0090984B1 (en)
JP (1) JPS5941675A (en)
AT (1) ATE30937T1 (en)
CA (1) CA1194183A (en)
DE (2) DE3212504A1 (en)
YU (1) YU74283A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3335257A1 (en) * 1983-09-29 1985-04-18 Klöckner-Humboldt-Deutz AG, 5000 Köln Control arrangement for the temperature-dependent adjustment of the filling of a hydrodynamic clutch
DE3502966A1 (en) * 1984-06-01 1985-12-05 Robert Bosch Gmbh, 7000 Stuttgart DEVICE FOR CONTROLLING AND REGULATING THE TEMPERATURE OF A GLOW PLUG
US5158050A (en) * 1991-09-11 1992-10-27 Detroit Diesel Corporation Method and system for controlling the energization of at least one glow plug in an internal combustion engine
FR2858026B1 (en) * 2003-07-24 2006-01-13 Peugeot Citroen Automobiles Sa METHOD FOR MANAGING INTERNAL COMBUSTION ENGINE
AT500664B1 (en) * 2005-11-08 2007-06-15 Avl List Gmbh MOTOR CONTROL UNIT FOR AN INTERNAL COMBUSTION ENGINE
EP2123901B1 (en) * 2008-05-21 2013-08-28 GM Global Technology Operations LLC A method for controlling the operation of a glow-plug in a diesel engine
JP5660612B2 (en) * 2011-01-12 2015-01-28 ボッシュ株式会社 Glow plug tip temperature estimation method and glow plug drive control device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2743059A1 (en) * 1977-09-24 1979-04-05 Beru Werk Ruprecht Gmbh Co A Rapid glow plug heating for diesel engine - supplying overcurrent to plug until glow temp. is reached and then pulsing current
EP0042333A1 (en) * 1980-06-16 1981-12-23 ACIERS ET OUTILLAGE PEUGEOT Société dite: Control device for a ventilation device of an internal-combustion engine
US4307689A (en) * 1979-09-05 1981-12-29 Champion Spark Plug Company Glow plug control circuit

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2323895A1 (en) * 1975-09-09 1977-04-08 Peugeot HOT POINT IGNITION DEVICE FOR INTERNAL COMBUSTION ENGINE
US4162669A (en) * 1977-02-22 1979-07-31 Toyota Jidosha Kogyo Kabushiki Kaisha Ignition system for rotary piston engines
US4088109A (en) * 1977-02-25 1978-05-09 General Motors Corporation Diesel engine warm-up control system
JPS543630A (en) * 1977-06-08 1979-01-11 Mitsubishi Motors Corp Preheating plug control for diesel engine
JPS584191B2 (en) * 1977-06-29 1983-01-25 いすゞ自動車株式会社 Diesel engine starting device
US4137885A (en) * 1977-10-11 1979-02-06 General Motors Corporation Diesel engine glow plug energization control circuit
JPS6060024B2 (en) * 1977-10-19 1985-12-27 株式会社日立製作所 Engine control method
JPS5750540Y2 (en) * 1978-04-04 1982-11-05
JPS5730428Y2 (en) * 1978-06-30 1982-07-03
JPS6045757B2 (en) * 1978-07-10 1985-10-11 いすゞ自動車株式会社 Diesel engine preheating control device
JPS5817354B2 (en) * 1978-09-19 1983-04-06 いすゞ自動車株式会社 Diesel engine starting accelerator
US4228880A (en) * 1978-09-25 1980-10-21 Eaton Corporation Pulse control of an electro magnetically actuated viscous fluid coupling
JPS55114877A (en) * 1979-02-26 1980-09-04 Diesel Kiki Co Ltd Auxiliary starter of diesel engine
SE8006122L (en) * 1979-09-05 1981-03-06 Champion Spark Plug Co DEVICE FOR REGULATING ENERGY SUPPLY TO GLASS PIPE FOR DIESEL ENGINES
DE2938706A1 (en) * 1979-09-25 1981-04-09 Klöckner-Humboldt-Deutz AG, 5000 Köln FILLING CONTROL FOR A HYDRODYNAMIC CLUTCH
US4357525A (en) * 1980-02-04 1982-11-02 Texas Instruments Incorporated Glow plug duty cycle modulating apparatus
US4307688A (en) * 1980-02-07 1981-12-29 General Motors Corporation Diesel engine glow plug energization control system
JPS56129581U (en) * 1980-03-03 1981-10-01
US4375205A (en) * 1980-07-03 1983-03-01 Champion Spark Plug Company Glow plug control circuit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2743059A1 (en) * 1977-09-24 1979-04-05 Beru Werk Ruprecht Gmbh Co A Rapid glow plug heating for diesel engine - supplying overcurrent to plug until glow temp. is reached and then pulsing current
US4307689A (en) * 1979-09-05 1981-12-29 Champion Spark Plug Company Glow plug control circuit
EP0042333A1 (en) * 1980-06-16 1981-12-23 ACIERS ET OUTILLAGE PEUGEOT Société dite: Control device for a ventilation device of an internal-combustion engine

Also Published As

Publication number Publication date
YU74283A (en) 1987-10-31
EP0090984A3 (en) 1984-04-11
EP0090984A2 (en) 1983-10-12
JPS5941675A (en) 1984-03-07
CA1194183A (en) 1985-09-24
DE3374577D1 (en) 1987-12-23
DE3212504A1 (en) 1983-10-13
US4487169A (en) 1984-12-11
ATE30937T1 (en) 1987-12-15

Similar Documents

Publication Publication Date Title
DE3313038C2 (en)
DE2051919C3 (en) Fuel injection device for an internal combustion engine
EP0034022B1 (en) Engine preheating control systems
DE19646151C2 (en) Exhaust filter for internal combustion engines
US4506145A (en) Device for controlling engine preheating
DE3517953A1 (en) METHOD AND SWITCHING ARRANGEMENT FOR REGULATING THE HEATING OUTPUT OF A HEATING DEVICE
EP0090984B1 (en) Internal-combustion engine comprising a central electronic control apparatus
DE4141946C2 (en) Method and device for controlling the operation of a secondary air pump
DE2720488C3 (en) Control system for a gas turbine engine for driving a road vehicle
DE10023911B4 (en) Control unit with feedback system
EP0315934A1 (en) Regulation method for the glow plug temperature in a diesel engine, and circuit therefor
DE3230211A1 (en) AIR / FUEL RATIO FEEDBACK CONTROL SYSTEM FOR USE IN AN INTERNAL COMBUSTION ENGINE
DE60005751T2 (en) Method for switching the fuel in a gasoline or gas driven internal combustion engine
DE4036844C2 (en)
DE3642402C2 (en)
DE19726601A1 (en) System for controlling heating unit of exhaust monitor in IC engine
DE4225361A1 (en) Functional testing of secondary air admission into IC engine exhaust - involves measuring lambda value of exhaust gases by sensor supplying electronic control unit for secondary air pump and valve
DE3839535C2 (en)
DE69631867T2 (en) Heating controller for an air-fuel ratio sensor
DE3736690A1 (en) DEVICE FOR CONTROLLING THE COMBUSTION IN A HEATING
DE3625044C2 (en)
DE3839307A1 (en) Heater for vehicles
EP0314961B1 (en) Apparatus to determine the fuel injection quantity for an internal-combustion engine
DE3008757A1 (en) LIQUID FUEL ROOM HEATING DEVICE AND METHOD FOR TEMPERATURE CONTROL THEREOF
DE102004032469B4 (en) Air-fuel ratio control device for internal combustion engines and associated method

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT DE FR GB IT SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): AT DE FR GB IT SE

17P Request for examination filed

Effective date: 19840217

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT DE FR GB IT SE

REF Corresponds to:

Ref document number: 30937

Country of ref document: AT

Date of ref document: 19871215

Kind code of ref document: T

ITF It: translation for a ep patent filed

Owner name: ING. C. GREGORJ S.P.A.

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19871130

REF Corresponds to:

Ref document number: 3374577

Country of ref document: DE

Date of ref document: 19871223

ET Fr: translation filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19890331

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19891031

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19900202

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19900207

Year of fee payment: 8

ITTA It: last paid annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19901201

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19910318

Ref country code: AT

Effective date: 19910318

GBPC Gb: european patent ceased through non-payment of renewal fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19911129

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST