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EP0080392A1 - Überwachungsvorrichtung für eine Brennkraftmaschine - Google Patents

Überwachungsvorrichtung für eine Brennkraftmaschine Download PDF

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Publication number
EP0080392A1
EP0080392A1 EP82401985A EP82401985A EP0080392A1 EP 0080392 A1 EP0080392 A1 EP 0080392A1 EP 82401985 A EP82401985 A EP 82401985A EP 82401985 A EP82401985 A EP 82401985A EP 0080392 A1 EP0080392 A1 EP 0080392A1
Authority
EP
European Patent Office
Prior art keywords
engine
counter
signal
revolutions
threshold
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Withdrawn
Application number
EP82401985A
Other languages
English (en)
French (fr)
Inventor
Michel Belou
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0080392A1 publication Critical patent/EP0080392A1/de
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C5/00—Registering or indicating the working of vehicles
    • G07C5/006—Indicating maintenance
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition

Definitions

  • the present invention relates to an apparatus for monitoring an internal combustion engine, in particular on board a vehicle, designed to signal the need to carry out a maintenance operation on said engine.
  • This device is, according to the invention, characterized in that it includes an electronic counter totaling, from a reference state, the revolutions made by the engine. and triggering a signaling device when the total number of revolutions made by the engine reaches a predetermined threshold.
  • Such a device provides a warning signal indicating that a maintenance operation must be carried out on the engine not as a function of the operating time of this or as a function of the distance traveled by the vehicle which it equips, but depending on the number of revolutions made by the engine.
  • This criterion is much more rational than the previous two, because it reflects the actual performance provided by the engine, whereas, if we base our on the operating time, we do not take into account the speed of rotation more or less of the engine and, if we refer to the distance traveled by the vehicle, we neglect the periods of engine operation at idle, vehicle stopped.
  • the device therefore indicates very precisely when a maintenance operation is required, in particular the oil change from the engine.
  • the device's signaling device preferably comprises a sound source which, controlled by the counter, emits, when the engine is running, an acoustic signal which is intermittent at least in an initial period following the reaching of said threshold.
  • This signal is thus formed of a series of more or less spaced sound pulses. It can advantageously be provided, in the event that this intermittent signal has been neglected by the user and in order to more firmly commit the latter to heed the warning, that this acoustic signal becomes a continuous signal when the number of revolutions performed by the motor exceeds a predetermined value located beyond of the aforementioned threshold.
  • the signaling device may also include a light source which, controlled by the counter, emits, when the engine is running, a visual signal, which is preferably intermittent as long as the number of revolutions made by the engine is below the threshold, then continuous. when the number of turns exceeds this threshold.
  • a reset contact must be associated with the counter.
  • the actuation of this contact can be left at the user's free disposal.
  • the actuation of the reset contact requires the special key use, entrusted by example in the vehicle maintenance department of an industrial company or a vehicle rental company.
  • the user of a vehicle cannot cease the discomfort inflicted on him by the warning signal, especially the audible signal, other than by having the necessary maintenance operation carried out.
  • An apparatus can be used to carry out multiple maintenance checks, by connecting its signaling device to various organ monitoring sensors belonging to the engine and / or to the vehicle which is equipped with it, so that it emits a warning signal when any one of these sensors indicates that the corresponding member requires a maintenance operation.
  • This can include monitoring the engine oil pressure, the temperature of its coolant, the condition of the vehicle brakes, etc.
  • An apparatus according to the invention can advantageously be provided with a means of protection against being torn off. Removing the device would indeed allow a careless user to suppress the warning signal without having carried out the corresponding maintenance operation. For this purpose, it is for example possible, in the case of a gasoline engine, to pass the ignition circuit inside the device, the presence of the latter being therefore necessary to start the engine.
  • the monitoring device comprises a binary counter 1 which receives on its input a series of pulses A available at the common point of the ignition coil 2 and the breaker 3 of the petrol engine equipping a vehicle with the edge of which the device is mounted. It is also possible to use the ignition pulses appearing at the terminals of a spark plug of the engine.
  • counter 1 counts the pulses A and shows by reduction of the signals B, C and D.
  • the signal B is a square signal whose period is around 1 to 2 seconds for an average speed of rotation of the motor.
  • Signals C and D include a change of state from 0 to 1 when the number of pulses A reaches a threshold n 1 and a value n 2 greater than n I respectively .
  • the threshold n 1 set to be reached for example when the engine has completed 11 million revolutions, corresponds to the need for the vehicle user to change the engine oil.
  • warning light 4 When threshold 1 is reached, this is indicated by a warning light 4 and a "drain alarm” buzzer 5.
  • the warning light 4 is supplied by a signal E resulting from the meeting by a gate OR 6 of the signals B and C. This warning light, extinguished when the engine is stopped, thus starts to flash at the frequency of the signal B as soon as the engine is running.
  • the warning light 4 When the total number of revolutions of the engine reaches the threshold n 1 , the warning light 4 remains permanently on, thus indicating that draining must be done.
  • the buzzer 5 is fed by a signal F resulting from the union by an OR gate 7 of the signal D and of a signal G from an AND gate 8 which brings the signals B and C into coincidence. It follows that the buzzer 5 remains silent as long as the engine has not reached by turning the threshold n 1 , then, from this makes an intermittent signal be heard at the frequency of the signal B, and, beyond h value n 2 , adjusted for example at 15 million revolutions, a signal contains a reinforced alarm which indicates that the threshold n 1 has been greatly exceeded and that the oil change must absolutely be carried out under penalty of serious damage to the engine.
  • a signal B ′ of frequency lower than that of the signal B can be applied to the AND gate 8, through a monostable circuit 9. Consequently, in the interval n 1 - n 2 , the buzzer 5 emits more spaced sound pulses than in the previous case, each for a time determined by the adjustment of the monostable circuit 9 and independent of the engine rotation speed.
  • the corresponding sound signal can for example be formed by pulses of 2 seconds spaced (for an average engine speed) by about one minute.
  • the alarm signaling is suppressed by resetting the counter 1 by means of a contact 11.
  • this contact will be free actuable by the owner of the vehicle, for example by means of a small rod (such as the tip of a pen) introduced by a hole drilled in the casing of the device and pressing a microswitch containing the contact 11 and incorporated in this casing .
  • a small rod such as the tip of a pen
  • the operation of the contact 11 requires the use of a special key held only by the maintenance personnel of the vehicles, who is then only empowered to stop the alarm (when draining).
  • the OR gate 7 further receives a signal H from an OR gate 10 whose inputs are connected to various indicators, in this example to a "brake” warning light 12 and an “oil” warning light 13 fitted to the vehicle, the ignition of which, controlled by contacts 14, 15 via amplifiers 16, 17, indicates respectively that the brake pads have to be changed and that a fault has appeared in the engine oil circuit.
  • the visual indication provided by the LEDs 11, 12 is lined by a continuous audible signal emitted by the b uzzer 5.
  • FIG. 3 illustrates a practical example of an electronic circuit corresponding to the diagram in FIG. 1.
  • the counter 1 is composed of two integrated circuits 1a, 1b connected in cascade.
  • the integrated circuit receives it, by a terminal 23 of the connector with which the device is equipped, the pulses A through a clipping cell 18.
  • the signals B and C are available respectively on a terminal of the circuit la and on a terminal of the circuit lb.
  • Signal D is produced using a NAND gate 19 belonging to a third integrated circuit 20, and the signal G using another NAND gate 8 'of this circuit, realizing the logic function of gate 8 of FIG. 1.
  • the indicator light 4 is supplied by the OR gate 6 with diodes via an amplifier transistor 21.
  • the buzzer 5 is supplied by the OR gate 7, also with diodes, via an amplifier transistor 22 and by the OR gate 10, also with diodes, whose inputs are connected to the outputs of the amplifier transistors 16, 17 supplying the "brake alarm” 12 and “oil alarm” warning lights 13 and receiving, via two other doors.
  • NANDs of circuit 20 (not shown) mounted as simple reversers, the signals appearing on terminals 24, 25 of the connector coming from the indicator contacts 14, 15 of brake and oil faults.
  • circuits 1a, 1b for counting the revolutions of the motor, as well as the logic circuit 20, remain permanently supplied, their supply terminals + being directly connected, via a terminal 26 of the connector, to the positive pole of the vehicle battery, the negative pole of which is connected to a terminal 27.
  • This arrangement makes it possible to keep in memory in the counter la, b during the periods of stopping the engine the number of revolutions previously totaled.
  • the amplifier transistors 16, 17, 21 and 22 are supplied via a terminal 28 connected to the positive pole of the battery by means of the vehicle ignition key. They are therefore out of service, as well as the buzzer and the indicators they control; after stopping the engine by operating the ignition key.
  • the indicators 4, 12 and 13 are constituted by light-emitting diodes.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Testing Of Engines (AREA)
  • Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)
EP82401985A 1981-10-28 1982-10-27 Überwachungsvorrichtung für eine Brennkraftmaschine Withdrawn EP0080392A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8120236 1981-10-28
FR8120236A FR2515261B1 (fr) 1981-10-28 1981-10-28 Appareil de surveillance d'un moteur a explosion, notamment a bord d'un vehicule

Publications (1)

Publication Number Publication Date
EP0080392A1 true EP0080392A1 (de) 1983-06-01

Family

ID=9263485

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82401985A Withdrawn EP0080392A1 (de) 1981-10-28 1982-10-27 Überwachungsvorrichtung für eine Brennkraftmaschine

Country Status (5)

Country Link
EP (1) EP0080392A1 (de)
JP (1) JPS58501830A (de)
AU (1) AU8998582A (de)
FR (1) FR2515261B1 (de)
WO (1) WO1983001654A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2603067B2 (ja) * 1986-04-21 1997-04-23 株式会社小松製作所 車両保守管理用モニタシステム

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2335960A1 (de) * 1973-07-14 1975-01-30 Vdo Schindling Anzeigeeinrichtung fuer wartungs- oder inspektionszeitpunkte bei fahrzeugen
FR2341451A1 (fr) * 1976-02-18 1977-09-16 Transputer Pty Ltd Accessoire notamment pour detecter un usage incorrect d'un vehicule
DE3040223A1 (de) * 1979-10-24 1981-05-07 Nissan Motor Co., Ltd., Yokohama, Kanagawa Akustische informations- oder wandeinrichtung fuer kraftfahrzeuge

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2335960A1 (de) * 1973-07-14 1975-01-30 Vdo Schindling Anzeigeeinrichtung fuer wartungs- oder inspektionszeitpunkte bei fahrzeugen
FR2341451A1 (fr) * 1976-02-18 1977-09-16 Transputer Pty Ltd Accessoire notamment pour detecter un usage incorrect d'un vehicule
DE3040223A1 (de) * 1979-10-24 1981-05-07 Nissan Motor Co., Ltd., Yokohama, Kanagawa Akustische informations- oder wandeinrichtung fuer kraftfahrzeuge

Also Published As

Publication number Publication date
AU8998582A (en) 1983-05-18
FR2515261B1 (fr) 1987-05-29
JPS58501830A (ja) 1983-10-27
FR2515261A1 (fr) 1983-04-29
WO1983001654A1 (fr) 1983-05-11

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

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