EP0032880A2 - A preheating device for preliminary heating the liquid of the cooling circuit of a motor-vehicle engine - Google Patents
A preheating device for preliminary heating the liquid of the cooling circuit of a motor-vehicle engine Download PDFInfo
- Publication number
- EP0032880A2 EP0032880A2 EP81830006A EP81830006A EP0032880A2 EP 0032880 A2 EP0032880 A2 EP 0032880A2 EP 81830006 A EP81830006 A EP 81830006A EP 81830006 A EP81830006 A EP 81830006A EP 0032880 A2 EP0032880 A2 EP 0032880A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- motor
- vehicle
- metallic body
- preheating device
- cooling circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N19/00—Starting aids for combustion engines, not otherwise provided for
- F02N19/02—Aiding engine start by thermal means, e.g. using lighted wicks
- F02N19/04—Aiding engine start by thermal means, e.g. using lighted wicks by heating of fluids used in engines
- F02N19/10—Aiding engine start by thermal means, e.g. using lighted wicks by heating of fluids used in engines by heating of engine coolants
Definitions
- the present invention relates to an auxiliary preheating device to be mounted on a motor-vehicle, particularly but not exclusively on an industrial vehicle provided with a diesel-cycle engine, and to be used for preliminary heating the liquid of the cooling circuit of the engine of the vehicle in order to facilitate its cold start.
- the object of the present invention is to provide a preheating device particularly simple, cheap and functional, with a reduced encumbrance and formed by a restricted number of pieces.
- a preheating device for preliminary heating the liquid of the cooling circuit of a motor-vehicle engine comprising:
- the thermal energy for preliminary heating the liquid of the cooling circuit of the engine of a motor-vehicle is supplied by an electric source independent from the battery of the vehicle on which the device is to be mounted, thereby avoiding any risk of discharging the battery itself.
- the electric feeding circuit of the device is provided with a switch controlled by a programmable timer.
- the switch can be automatically switched on, in order to put in action the heating resistors and the electric pump, at a predetermined time, for example 15-20 minutes before the estimated time of starting the engine of the motor-vehicle.
- the device further comprises a tubular envelope which surrounds at least the portion of the metallic body wherein the said two axial bores containing the heating resistors extend, the said envelope defining with the lateral surface of the said metallic body a periferical annular interspace containing a thermally insulating material.
- the preheating device essentially comprises a heater 10 and an electrical pump 12.
- the heater 10 is constituted by a substantially cilindri- cal massive metallic body 14, preferably of alluminium, having an upper axial portion 16 and a lower enlarged axial portion 18.
- An axial cavity 20 of rectangular cross section is formed along the medial part of the body 14.
- Two diametrically opposed axial bores having a length substantially corresponding to that of portion 16 of the body 14 extend adjacent to and on opposite sides of cavity 20.
- Within each bore 22 an armored heating resistor 24 is inserted within each bore 22. The armors of resistors 24 contact the walls of the respective bores 22.
- the axial cavity 20 communicates superiorly with an inlet tubular connector 26 screwed into the body 14, and inferiorly with an axial chamber 28 extending in correspondence of the lower end of the portion 18 of the body 14.
- This chamber 28 communicates with an outlet tubular connector 30 screwed within the lateral wall of the body 14.
- the portion 16 of the body 14 is coaxially surrounded by a tubular envelope 32 which defines with the external surface of the portion 16 a periferical annular interspace 34 within which a thermally insulating material is inserted.
- the electric pump 12 comprises an electric motor 36 disposed within a cylindrical case 38 hermetically fixed to the lower end of the portion 18 and of the body 14.
- the shaft of the motor 36 drives at one end a rotor 40 inserted within the chamber 28 of the body 14, and at the other end a cooling fan 42.
- An external protective envelope 44 having a lateral upper projection 46 is removably fixed to the case 38.
- the projection 46 forms a cover for a thermostat 48, disposed within the lower part of one of the bores 22, and for a terminal board 50. supported by the lateral wall of the portion 18 of the body 14 for the connection of a number of cables connected to the heating resistor 24, to the electric motor 36 and to the thermostat 48.
- the thermical board 50 is connected through a cable 51 to an electrical plug 52 which can be introduced within a common current tap or socket, not shown in the drawings, connected to an alternate current distribution network.
- the electrical connection between the terminal board 50 and the plug 52 is controlled by means of a switch 54 provided with a programmable timer of conventional type connected to the terminal board 50 by way of a cable 56.
- the portion 18 of the body 14 is provided, on its .side opposite to the projection 46 of the envelope 44, with a flat portion 58 provided with bores 60 adapted to receive screws for securing the device to a motor-vehicle strut.
- the above described preheating device can be used in order to facilitate cold starting of the engine of the motor-vehicle on which it is . mounted.
- the mounting of the device is accomplished, after fixing the body 14 to the strut of the vehicle, connecting the inlet connector 26 and the outlet connector 30 to the cooling circuit of the engine of the vehicle.
- the switch 54 may be programmed in order to connect automatically the plug 52 with the terminal board 50 at a predetermined time, corresponding for example to 15-20 minutes before the estimated time of starting the engine of the vehicle. In this way the current is fed exactly at the predetermined hour through the terminal board 50 to the heating resistor 24, to the electric motor 36 of the pump 12 and to the thermostat 48.
- the cooling liquid of the engine circulates through the cavity 20 of the body 14 and is thus preheated, by conduction through the body 14, by the two resistors 24. In this way the cooling liquid is preheated within the heater 10 as long as a predetermined temperature, comprised for example between 60 and 70°C, is reached.
- the value of the predetermined temperature can be modified adjusting the temperature of intervention of the thermostat 48. As soon as this temperature is reached, the thermostat 48 cuts off the current to the heating resistors 24. At this point the plug 52 can be drawn out from the socket and the engine of the vehicle can be started.
- the preheating device according to the invention besides being extremely simple and functional, has an extremely limited encumbrance and can be manufactured in a simple and cheap way.
Abstract
A preheating device for preliminary heating the liquid of the cooling circuit of a motor-vehicle engine comprising a heater (10) formed by a massive metallic cylindrical body (14) having an axial through cavity (20) adapted to be connected to the cooling circuit of the engine and two axial bores (22) each containing an armored heating resistor (24), an electric pump (12), and an electric feeding circuit (50, 51, 52, 54) for connecting the device to an electrical source disposed outside the motor-vehicle. The electric circuit comprises a switch controlled by a programmable timer (54).
Description
- The present invention relates to an auxiliary preheating device to be mounted on a motor-vehicle, particularly but not exclusively on an industrial vehicle provided with a diesel-cycle engine, and to be used for preliminary heating the liquid of the cooling circuit of the engine of the vehicle in order to facilitate its cold start.
- The object of the present invention is to provide a preheating device particularly simple, cheap and functional, with a reduced encumbrance and formed by a restricted number of pieces.
- According to the present invention there is provided a preheating device for preliminary heating the liquid of the cooling circuit of a motor-vehicle engine comprising:
- - a heater with heating resistors controlled by a thermostat, the said heater being formed by a substantially cylindrical massive metallic body having a through axial cavity which forms a heating chamber through which in use the liquid of the cooling circuit of the engine of a motor-vehicle circulates, and at least two axial bores disposed on opposite sides with respect to the said heating chamber and each containing an armored resistor; the said metallic body being provided with an inlet tubular connector and an outlet tubular connector both communicating with the said heating chamber and adapted to be connected in use to the cooling circuit of the engine of a motor-vehicle,
- - an electric pump having a body secured to one end of the metallic body and a rotor inserted within a cavity of the said metallic body communicating with the said heating chamber and with the said outlet tubular connector,
- - an electric feeding circuit for connecting in use the heating resistors, the thermostat and the electric pump with an electric source placed outside the motor-vehicle.
- In the preheating device according to the invention the thermal energy for preliminary heating the liquid of the cooling circuit of the engine of a motor-vehicle is supplied by an electric source independent from the battery of the vehicle on which the device is to be mounted, thereby avoiding any risk of discharging the battery itself.
- According to the invention, the electric feeding circuit of the device is provided with a switch controlled by a programmable timer.
- Due to this feature the switch can be automatically switched on, in order to put in action the heating resistors and the electric pump, at a predetermined time, for example 15-20 minutes before the estimated time of starting the engine of the motor-vehicle.
- According to another feature of the invention, the device further comprises a tubular envelope which surrounds at least the portion of the metallic body wherein the said two axial bores containing the heating resistors extend, the said envelope defining with the lateral surface of the said metallic body a periferical annular interspace containing a thermally insulating material.
- In this way an extremely high thermal efficiency of the heater is obtained.
- The invention will now be described in greater detail, reference being made by way of example to the accompanying drawings, in which:
- Figure 1 is a partially sectioned side elevation view of a preheater device according to the invention,
- Figure 2 is a longitudinal section taken along the line II-II of Figure 1, and
- Figure 3 is a plan view according to the arrow III of Figure 1.
- The preheating device according to the invention essentially comprises a
heater 10 and anelectrical pump 12. - The
heater 10 is constituted by a substantially cilindri- cal massivemetallic body 14, preferably of alluminium, having an upperaxial portion 16 and a lower enlargedaxial portion 18. Anaxial cavity 20 of rectangular cross section is formed along the medial part of thebody 14. Two diametrically opposed axial bores having a length substantially corresponding to that ofportion 16 of thebody 14 extend adjacent to and on opposite sides ofcavity 20. Within eachbore 22 anarmored heating resistor 24 is inserted. The armors ofresistors 24 contact the walls of therespective bores 22. - The
axial cavity 20 communicates superiorly with an inlettubular connector 26 screwed into thebody 14, and inferiorly with anaxial chamber 28 extending in correspondence of the lower end of theportion 18 of thebody 14. Thischamber 28 communicates with an outlettubular connector 30 screwed within the lateral wall of thebody 14. - The
portion 16 of thebody 14 is coaxially surrounded by atubular envelope 32 which defines with the external surface of the portion 16 a perifericalannular interspace 34 within which a thermally insulating material is inserted. - The
electric pump 12 comprises anelectric motor 36 disposed within acylindrical case 38 hermetically fixed to the lower end of theportion 18 and of thebody 14. The shaft of themotor 36 drives at one end arotor 40 inserted within thechamber 28 of thebody 14, and at the other end a cooling fan 42. - An external
protective envelope 44 having a lateralupper projection 46 is removably fixed to thecase 38. Theprojection 46 forms a cover for athermostat 48, disposed within the lower part of one of thebores 22, and for aterminal board 50. supported by the lateral wall of theportion 18 of thebody 14 for the connection of a number of cables connected to theheating resistor 24, to theelectric motor 36 and to thethermostat 48. - The
thermical board 50 is connected through acable 51 to anelectrical plug 52 which can be introduced within a common current tap or socket, not shown in the drawings, connected to an alternate current distribution network. The electrical connection between theterminal board 50 and theplug 52 is controlled by means of aswitch 54 provided with a programmable timer of conventional type connected to theterminal board 50 by way of acable 56. - As shown in Figure 3, the
portion 18 of thebody 14 is provided, on its .side opposite to theprojection 46 of theenvelope 44, with aflat portion 58 provided withbores 60 adapted to receive screws for securing the device to a motor-vehicle strut. - The above described preheating device can be used in order to facilitate cold starting of the engine of the motor-vehicle on which it is . mounted. The mounting of the device is accomplished, after fixing the
body 14 to the strut of the vehicle, connecting theinlet connector 26 and theoutlet connector 30 to the cooling circuit of the engine of the vehicle. - In use, after insertion of
plug 52 into a corresponding socket, theswitch 54 may be programmed in order to connect automatically theplug 52 with theterminal board 50 at a predetermined time, corresponding for example to 15-20 minutes before the estimated time of starting the engine of the vehicle. In this way the current is fed exactly at the predetermined hour through theterminal board 50 to theheating resistor 24, to theelectric motor 36 of thepump 12 and to thethermostat 48. By means of thepump 12 the cooling liquid of the engine circulates through thecavity 20 of thebody 14 and is thus preheated, by conduction through thebody 14, by the tworesistors 24. In this way the cooling liquid is preheated within theheater 10 as long as a predetermined temperature, comprised for example between 60 and 70°C, is reached. The value of the predetermined temperature can be modified adjusting the temperature of intervention of thethermostat 48. As soon as this temperature is reached, thethermostat 48 cuts off the current to theheating resistors 24. At this point theplug 52 can be drawn out from the socket and the engine of the vehicle can be started. - It is evident from the foregoing how the preheating device according to the invention, besides being extremely simple and functional, has an extremely limited encumbrance and can be manufactured in a simple and cheap way.
Claims (4)
1. A preheating device for preliminary heating the liquid of the cooling circuit of a motor-vehicle engine, comprising;
- a heater (10) with heating resistors (24) controlled by a thermostat (48), the said heater (10) being constituted by a substantially cylindrical massive metallic body (14) having an axial through cavity (20) forming a heating chamber through which in use the liquid of the cooling circuit of the engine of a motor-vehicle circulates, and two axial bores (22) disposed on opposite sides with respect to the said heating chamber (20) and each containing an armored resistor (24); the said metallic body (14) being provided with an inlet tubular connector (26) and an outlet tubular connector (30) communicating with the said heating chamber (20) and are adapted to be connected, in use, to the cooling circuit of the engine of a motor-vehicle.
- an electric pump (12) having a body (38) secured to one end (18) of the metallic body (14) and a rotor (40) inserted within a cavity (28) of the said metallic body (14) which communicates with the said heating chamber (20) and with the said outlet tubular connector (30).
- an electric feeding circuit (50, 51, 52, 54) for connecting in use the heating resistors (24), the thermostat (48) and the electric pump (12) with an electric source disposed outside the motor-vehicle.
2. A preheating device as defined in Claim 1, wherein the electric feeding circuit comprises a switch controlled by a programmable timer (54).
3. A preheating device as defined in Claim 1, further comprising a tubular envelope (32) surrounding at least the portion (16) of the metallic body (14) within which the said axial bores (22) containing the heating resistors (24) extend, the said tubular envelope (32) defining with the lateral surface of the metallic body (14) a periferical annular interspace (34) containing a thermally insulating material.
4. A preheating device as defined in Claim 1, wherein i the lateral surface of the metallic body (14) has a flat portion (58) provided with bores (60) for securing the device to a motor-vehicle strut.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT5285080U | 1980-01-21 | ||
IT5285080U IT8052850V0 (en) | 1980-01-21 | 1980-01-21 | DEVICE FOR PRE-HEATING THE LIQUID OF THE MOTOR VEHICLE ENGINE COOLING CIRCUIT |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0032880A2 true EP0032880A2 (en) | 1981-07-29 |
EP0032880A3 EP0032880A3 (en) | 1981-08-05 |
Family
ID=11277970
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP81830006A Withdrawn EP0032880A3 (en) | 1980-01-21 | 1981-01-19 | A preheating device for preliminary heating the liquid of the cooling circuit of a motor-vehicle engine |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0032880A3 (en) |
IT (1) | IT8052850V0 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2583001A1 (en) * | 1985-06-10 | 1986-12-12 | Bidaux Alain | Fuel heater for vehicle using the heating of the cooling circuit |
US5275538A (en) * | 1990-07-09 | 1994-01-04 | Deco-Grand, Inc. | Electric drive water pump |
US5482432A (en) * | 1990-07-09 | 1996-01-09 | Deco-Grand, Inc. | Bearingless automotive coolant pump with in-line drive |
WO2021083585A1 (en) * | 2019-10-28 | 2021-05-06 | Nidec Gpm Gmbh | Electric coolant pump with heating element |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1806442A (en) * | 1929-04-26 | 1931-05-19 | Alonzo C Bell | Means for preliminarily heating internal combustion engines |
US3970247A (en) * | 1974-11-07 | 1976-07-20 | Keeling Boyd E | Conservation of energy heater |
US3979574A (en) * | 1975-03-31 | 1976-09-07 | Canadian General Electric Company Limited | Tank type engine heater |
FR2353723A1 (en) * | 1976-06-04 | 1977-12-30 | Rognon Armand | Engine oil and water heater - has immersion heater in closed chamber in water circuit also heating oil |
DE2653758A1 (en) * | 1976-11-26 | 1978-06-01 | Ewertz | Radiator preheater for cold starting diesel engine - has cooling circuit with electric mains heated cartridge controlled by thermostat |
-
1980
- 1980-01-21 IT IT5285080U patent/IT8052850V0/en unknown
-
1981
- 1981-01-19 EP EP81830006A patent/EP0032880A3/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1806442A (en) * | 1929-04-26 | 1931-05-19 | Alonzo C Bell | Means for preliminarily heating internal combustion engines |
US3970247A (en) * | 1974-11-07 | 1976-07-20 | Keeling Boyd E | Conservation of energy heater |
US3979574A (en) * | 1975-03-31 | 1976-09-07 | Canadian General Electric Company Limited | Tank type engine heater |
FR2353723A1 (en) * | 1976-06-04 | 1977-12-30 | Rognon Armand | Engine oil and water heater - has immersion heater in closed chamber in water circuit also heating oil |
DE2653758A1 (en) * | 1976-11-26 | 1978-06-01 | Ewertz | Radiator preheater for cold starting diesel engine - has cooling circuit with electric mains heated cartridge controlled by thermostat |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2583001A1 (en) * | 1985-06-10 | 1986-12-12 | Bidaux Alain | Fuel heater for vehicle using the heating of the cooling circuit |
US5275538A (en) * | 1990-07-09 | 1994-01-04 | Deco-Grand, Inc. | Electric drive water pump |
US5279503A (en) * | 1990-07-09 | 1994-01-18 | Deco-Grand, Inc. | Ram air electric drive water pump |
US5482432A (en) * | 1990-07-09 | 1996-01-09 | Deco-Grand, Inc. | Bearingless automotive coolant pump with in-line drive |
WO2021083585A1 (en) * | 2019-10-28 | 2021-05-06 | Nidec Gpm Gmbh | Electric coolant pump with heating element |
Also Published As
Publication number | Publication date |
---|---|
IT8052850V0 (en) | 1980-01-21 |
EP0032880A3 (en) | 1981-08-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4395623A (en) | Self-regulating electric heater | |
EP3228950A1 (en) | Heater assembly | |
EP0233136A2 (en) | Water heater heating element assembly | |
EP0032880A2 (en) | A preheating device for preliminary heating the liquid of the cooling circuit of a motor-vehicle engine | |
GB2322278A (en) | Heating element assembly | |
US4131871A (en) | Electrical device and method | |
EP0582428A1 (en) | Heating device and system for the internal combustion engine | |
US9995190B2 (en) | Contact heater | |
EP0543655B1 (en) | Immersible heater | |
KR102432371B1 (en) | Sheath heater | |
US7102106B2 (en) | Domestic appliances | |
KR20110132476A (en) | Fluid heater | |
CN210145541U (en) | Intelligent temperature control ultrasonic extraction instrument | |
ES8406812A1 (en) | Device for holding and connecting an electric motor | |
JPH028513Y2 (en) | ||
KR0133975Y1 (en) | Heater for vending machine | |
RU2052150C1 (en) | Self-adjusting fuel heater | |
FR2418600A1 (en) | Circulating fluid constant temp. maintaining system - has electric resistance heating unit having cavity and clamped in pump or valve | |
KR102432237B1 (en) | Coolant heating device for Vehicle | |
CN220742199U (en) | Thermal shrinkage device of high-voltage cable umbrella skirt | |
EP0869699A3 (en) | Electric element assembly | |
KR20170079895A (en) | Coolant heating apparatus | |
SU1747815A1 (en) | Generator of absorption refrigerating unit | |
RU21621U1 (en) | DEVICE FOR EASY STARTING THE INTERNAL COMBUSTION ENGINE (OPTIONS) | |
AU3687384A (en) | Electric radiator |
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 |
|
PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
AK | Designated contracting states |
Designated state(s): AT BE CH DE FR GB IT LI LU NL SE |
|
AK | Designated contracting states |
Designated state(s): AT BE CH DE FR GB IT LI LU NL SE |
|
17P | Request for examination filed |
Effective date: 19820129 |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: T.I.R. S.R.L. |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19831110 |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: BALDESSARI, ARNALDO |