US3609454A - Antiseizing safety device for motor or the like vehicles - Google Patents

Antiseizing safety device for motor or the like vehicles Download PDF

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Publication number
US3609454A
US3609454A US817668A US3609454DA US3609454A US 3609454 A US3609454 A US 3609454A US 817668 A US817668 A US 817668A US 3609454D A US3609454D A US 3609454DA US 3609454 A US3609454 A US 3609454A
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United States
Prior art keywords
contacts
relay
contact
pair
ignition circuit
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Expired - Lifetime
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US817668A
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English (en)
Inventor
Valmarino Capitanio
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Individual
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Individual
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Publication of US3609454A publication Critical patent/US3609454A/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/18—Indicating or safety devices
    • F01M1/20—Indicating or safety devices concerning lubricant pressure
    • F01M1/22—Indicating or safety devices concerning lubricant pressure rendering machines or engines inoperative or idling on pressure failure
    • F01M1/26—Indicating or safety devices concerning lubricant pressure rendering machines or engines inoperative or idling on pressure failure acting on engine ignition system

Definitions

  • a safety device for motor vehicles includes an electric contact which is controlled by bellows responding to oil pressure and which controls by means of a relay the opening of the ignition circuit of the engine when oil pressure is excessive. The contact closes automatically when oil pressure drops below the safety limit.
  • An auxiliary contact is controlled by a relay connected with the starting motor and is connected with a time switch to keep the ignition circuit closed during the starting of the engine until oil pressure is raised to a normal value.
  • Another contact controls the first-mentioned relay and is used to open the ignition circuit when temperature of oil or water becomes excessive.
  • the present invention concerns a safety device which makes it possible to avoid the seizing of an engine of a motor vehicle by automatically stopping the engine when the pressure of the oil in the lubricating circuit is too low or whenever the temperature of the lubricating oil or that of the cooling water is too high.
  • warning lights are now used in motor vehicles to warn the driver if the oil pressure drops below a certain limit or if the temperatures of the oil and water rise above certain limits.
  • the illuminated warning lights are not always noticed by the driver and this may result in serious consequences such as the complete seizing-up of the engine.
  • the engine stops automatically because the ignition circuit is interrupted when the pressure of the oil in the lubricating circuit falls below a predetermined limit or the temperature of the oil or water rises above a predetermined limit. This interruption is independent of the presence of the conventional warning lights which continue to operate as usual.
  • an antiseizing safety device for motor or the like vehicles is characterized by the feature that an electric contact, controlled by bellows responding to the pressure of the oil, controls, by means of a relay, the opening of the ignition circuit of the engine of the motor vehicle which similarly automatically closes when the pressure of the oil falls below a safety limit.
  • a second relay provided with a time switch which keeps the circuit closed until the pressure of the oil has reached the normal working value, are connected in parallel with the contacts of the above-mentioned relay.
  • a relay is closed automatically when the electric starting motor is fed and remains closed for a predetermined time by a conventional time switch.
  • the device has an electric contact 1 controlled by bellows reacting to the pressure of engine oil and connected in the feed circuit of the energizing coil 2 of the relay.
  • a contact 3 is controlled by contact 1 and is normally closed and connected in series in the feed circuit of the ignition coil 4 of the motor vehicle.
  • the contact 1 closes when the oil pressure falls below a predetermined safety limit causing the lighting of warning lamp 5 with which the vehicle is normally provided, and the energizing of the coil 2 of the relay so as to open the contact 3 and thus interrupt the ignition circuit of the engine.
  • the contact 6 remains closed for a period determined by a time switch 10, for example, of the clockwork type.
  • the feed circuit of the ignition coil 4 of the vehicle therefore, remains closed by contact 6 for a sufficient time to enable the pressure of the oil to be raised to a value such as to permit the opening of the contacts 1 and, consequently, closing of contact 3.
  • a second contact 11, for example, of the thermostatic bimetalic strip type, is closed when the temperature of the oil exceeds a predeterrmned limit lighting the warning lamp 12 with which the vehicle is normally provided and feeding the aforementioned relay coil 2.
  • the feed circuit of the coil 4 of the vehicle is therefore also interrupted in the case of a dangerous rise in the temperature of the oil.
  • another electric thermostat contact (not shown), similar to contact 11, may be arranged to be controlled by an excessive increase in the temperature of the water of the cooling circuit of the vehicle and also be connected in a manner identical to that of the contact 11 for feeding the coil 2 of the relay.
  • Similar devices sensitive to the temperature of a fluid may be disposed in any other circuit lubricating parts of the vehicle for automatically stopping the engine in the event of an excessive rise in the temperature of such fluid.
  • other biassed oil-pressure-sensitive means may be provided instead of the bellows and be of any suitable and known kind.
  • a safety device for the engine of a motor vehicle having an ignition circuit, a starting motor connected with the ignition circuit, and a starting circuit connected with said motor and said ignition circuit, said device comprising a pair of contacts, bellows reacting to engine oil pressure and adapted to close the contacts when oil pressure drop is excessive, a waming lamp connected in parallel with said contacts, a relay having an energizing coil connected in parallel with said lamp and said contacts and a contact closing member actuated by said coil, another pair of contacts, said closing member being adapted to close said other pair of contacts, a third pair of contacts in said ignition circuit, said other pair of contacts being connected in parallel with said third pair of contacts, another relay having an energizing coil connected with said starting circuit and a contact closing member adapted to close the third pair of contacts, and a time switch operatively connected with said other relay.
  • a safety device in accordance with claim 1, comprising another warning lamp connected in parallel with the firstmentioned lamp and a temperature-responsive contact switch connected in series with said other lamp.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
US817668A 1968-05-02 1969-04-21 Antiseizing safety device for motor or the like vehicles Expired - Lifetime US3609454A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT6156768 1968-05-02

Publications (1)

Publication Number Publication Date
US3609454A true US3609454A (en) 1971-09-28

Family

ID=11292447

Family Applications (1)

Application Number Title Priority Date Filing Date
US817668A Expired - Lifetime US3609454A (en) 1968-05-02 1969-04-21 Antiseizing safety device for motor or the like vehicles

Country Status (4)

Country Link
US (1) US3609454A (fr)
CH (1) CH500082A (fr)
DE (1) DE1920038A1 (fr)
FR (1) FR2007724A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2052410A2 (es) * 1991-05-07 1994-07-01 Carcedo Esteban Tajadura Sistema de proteccion de motores de explosion.
ES2066630A1 (es) * 1990-06-22 1995-03-01 Bosch Gmbh Robert Circuito de control para un interruptor de la presion del aceite en motores de combustion.
US6298820B1 (en) 1999-11-09 2001-10-09 Mercedes Textiles Limited Apparatus and method of protecting a water pump driven by a combustion engine from high speed damage

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2066630A1 (es) * 1990-06-22 1995-03-01 Bosch Gmbh Robert Circuito de control para un interruptor de la presion del aceite en motores de combustion.
ES2052410A2 (es) * 1991-05-07 1994-07-01 Carcedo Esteban Tajadura Sistema de proteccion de motores de explosion.
US6298820B1 (en) 1999-11-09 2001-10-09 Mercedes Textiles Limited Apparatus and method of protecting a water pump driven by a combustion engine from high speed damage

Also Published As

Publication number Publication date
CH500082A (it) 1970-12-15
DE1920038A1 (de) 1969-11-13
FR2007724A1 (fr) 1970-01-09

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