GB2078853A - Fuel burning intake air heater for internal combustion engines - Google Patents
Fuel burning intake air heater for internal combustion engines Download PDFInfo
- Publication number
- GB2078853A GB2078853A GB8112718A GB8112718A GB2078853A GB 2078853 A GB2078853 A GB 2078853A GB 8112718 A GB8112718 A GB 8112718A GB 8112718 A GB8112718 A GB 8112718A GB 2078853 A GB2078853 A GB 2078853A
- Authority
- GB
- United Kingdom
- Prior art keywords
- fuel
- tubular body
- starting aid
- rings
- aid according
- 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.)
- Granted
Links
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
- F02N19/06—Aiding engine start by thermal means, e.g. using lighted wicks by heating of fluids used in engines by heating of combustion-air by flame generating means, e.g. flame glow-plugs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23Q—IGNITION; EXTINGUISHING-DEVICES
- F23Q7/00—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs
- F23Q7/001—Glowing plugs for internal-combustion engines
Abstract
A flame producing heater to be mounted in an intake manifold includes a tubular body 19 about which is located a stack of electrically insulating and heat resisting rings 24. Wound on the rings is an electrical heating element 25 and in the wall of the tubular body is an aperture 23 through which fuel can flow. The fuel flows along the gaps defined between the rings to the heating element and is vapourised and subsequently ignited by a coil 31. <IMAGE>
Description
SPECIFICATION
Starting aids for internal combustion engines
This invention relates to starting aids for assisting
the starting of internal combustion engines and of
the kind which are located in the air inlet manifold of
the engine and to which liquid fuel is supplied, the
fuel being vapourised and ignited so that a flame is
produced which heats the air flowing to the engine.
A starting aid of this type is disclosed in the
specification of British Patent 1001311 and it com
prises a tubular body which at one end is connected
to a fuel supply and from the other end of which
emerges when the aid is in use, a stream of
vapourised fuel. This is mixed with air within a
tubular shield and ignited. Atemperature responsive
valve is provided within the aforesaid body and
which opens to allow fuel flow only when an electric
heating element surrounding the body, has heated
the body a sufficient amount to guarantee vapour
isation of the fuel. The aid described does require an
appreciable time to become operative and it is
therefore the usual practice to energise the starting
aid a few seconds before the engine is cranked for
starting purposes.
The delay in the aid becoming operative is due to
the need to heat the bodyto a temperature at which
it will vapourise the fuel and whilst the thermal mass
of the body can be reduced, this often results in the
body being weak from the mechanical aspect so that
it cannot withstand the vibration to which it is
subject when the aid is mounted on an engine.
The object of the invention is to provide a starting
aid of the kind set forth in which the time required for
the aid to become operative is significantly reduced.
According to the invention a starting aid of the
kind specified comprises a tubular body which is
closed at one end, a fuel inlet to the other end of the
body, a stack of electrically insulating rings mounted
about the body, said rings being formed from a
material which can withstand high temperature, an
electrical heating element wound about said rings,
an aperture in the wall of said body and through
which fuel can flow to the peripheral surfaces of said
rings by way of the gaps therebetween, said element
acting to vapourise the fuel and means for igniting
the vapourised fuel.
An example of a starting aid in accordance with
the invention will now be described with reference to
the accompanying drawings in which:
Figure lisa sectional side elevation of the aid and
Figure 2 is a section on the line AA of Figure 1.
Referring to the drawings, the starting aid com
prises a main body 10 having a portion 11 of hexagonal shape and a peripherally screw threaded portion 12 which in use, is screwed into a com
plementarily threaded boss on the inlet manifold of ,the engine. Mounted on the body 10 is a split tubular
shroud 13 which is formed from thin sheet material
and which is provided with apertures 14 through
which in use, air being drawn along the inlet
manifold of the engine can flow to the zone defined
within the shroud. The open end of the shroud 13 is
closed by a closure plate 15 which is of dished form and is provided with an aperture 16.
The end of the main body remote from the shroud defines a fuel inlet generally indicated at 17. The fuel inlet communicates with a passage 18 in the main body and secured within the end portion of the passage remote from the inlet is a tubular body 19.
The tubular body 19is formed from metal and its end remote from the body 10 is closed by a cylindrical metallic plug 20. The plug 20 is carried by and is integral with a reduced extension 21 of a locating member 22 which is secured to the closure plate 15.
Formed in the tubular body 19 is at least one aperture 23. Moreover, surrounding the tube are a plurality of rings 24 which are formed from electrically insulating material which is also resistant to heat. Conveniently the rings 24 are formed from a ceramic material. The rings form a stack one end of the stack bearing against the body 10 whilst the other end of the stack bears against the locating member 22. wound about the stack of rings is a helical heating element 25 one end of which is secured to the locating member 22. The heating element is formed from metal tape. As mentioned, one end of the tape is secured to the locating member 22 whilst the other end of the tape indicated at 26, is electrically connected to a conductor member 27 which is supported in electrically insulating relationship within a bore 28 formed in the body.
The conductor member is integrallyformed with a terminal connector 29 which in use, is connected to one terminal of a source of electric current, the other terminal of which is connected to the body 10. The conductor member 27 is located in the bore 28 by means of an insulating plug 30 and the spaces at the opposite ends of the plug are filled with a suitable heat resistant and electrically insulating sealant. The connector and conductor member are integral with a plate 35 which is insulated by washers 36 from the body 10.
Located in the space defined by the shroud 13 is a helically wound ignition element generally indicated at 31. One end of this element is secured to the locating member 22 whilst the other end of the element is secured to the conductor member 27. It will be noted that the ignition element is formed from wire and that the end portion 32 is bent so that it lies substantially parallel to the conductor member 27. the ends of the elements are conveniently resistance welded to the conductor member and the closure plate and the shroud is welded in a similar fashion to the body 10.
The flow of fuel to the inlet 17 is conveniently controlled by an electromagnetic valve which is energised when the aid is required to be used. The current flowing in the two elements 25 and 31 may be controlled by an electrical control circuit which acts to ensure that under all operating conditions, the voltage applied to the elements is correct.
In operation, when the electromagnetic valve is opened and the elements energised, fuel flows through the aperture 23 and to the outer surfaces of the rings 24. This flow of fuel takes place along the small gaps defined between adjacent rings. As the fuel comes into contact with the heating element 25, it is vapourised and the vapourised fuel is ignited by the element 31. With this arrangement the fuel impinges directly upon the heating element and therefore the aid is operative as soon as the heating element has reached its operating temperature. The heating element is of course designed so that it reaches its operating temperature quickly and therefore the aid is effective very soon after electric power is supplied to the valve and the elements.It has been found that it is possible to energise the starting aid at the same time as the starting motor of the engine and that the aid will be effective to start the engine almost as soon as the starting motor has started to crankthe engine.
In the arrangement shown in Figure 1, the electromagnetic valve is disposed at some remote point to the starting aid. The valve however can be associated with the starting aid. It is necessary to carefully control the rate of fuel flow through the aperture or apertures 23 and for this purpose an orifice 33 is provided in an orifice plate 34 which is located in the inlet 17. In addition the pressure at the inlet 17 may be controlled by a regulating valve (not shown) which may be designed so that the air pressure in the inlet manifold of the engine is taken into account.
In this case it is advantageous to have the regulating valve located in an enlarged body of the starting aid.
The rings 24 as shown are provided with grooves in their end faces through which fuel can flow to the exterior surfaces of the rings. An alternative arrangement is to mount the rings so that they are axially loose on the member 19.
Claims (10)
1. A starting aid for assisting the starting of an internal combustion engine and of the kind which is located in the air inlet manifold of the engine and to which liquid fuel is supplied, the fuel being vapourised and ignited so that a flame is produced which heats the air flowing to the engine, the aid comprising a tubular body which is closed at one end, a fuel inlet to the other end of the body, a stack of electrically insulating rings mounted about the body, said rings being formed from a material which can withstand high temperature, an electrical heating element wound about said rings, an aperture in the wall of said body and through which fuel can flow to the peripheral surfaces of said rings by way of the gaps therebetween, said element acting to vapourise the fuel and means for igniting the vapourised fuel.
2. A starting aid according to claim 1 in which said one end of the tubular body is closed by a plug.
3. A starting aid according to claim 2 including an apertured shroud surrounding said tubular body in spaced relationship, the end of said shroud adjacent said one end of the tubular body being closed by a closure plate, said plug being formed integrally with a locating member carried by said closure plate, said locating member acting to locate one end of said stack of rings.
4. A starting aid according to claim 3 in which said tubular body and said shroud are carried by a main body which is adapted to be retained on the inlet manifold of the engine.
5. A starting aid according to claim 4 in which the means for igniting the vapourised fuel comprises an ignition element located in the space defined between the tubular body and the shroud.
6. A starting aid according to claim 5 in which said heating element and said ignition element are of helical form, said elements at said one end of the tubular body being secured to said locating member, the other ends of said elements being secured to a conductor member which extends in electrically insulating relationship through a bore formed in said main body.
7. A starting aid according to claim 6 including an insulating bush in said bore.
8. A starting aid according to claim 4 including a fuel passage in said main body, said fuel passage communicating with the interior of the tubular body and connecting with a fuel inlet in said main body.
9. A starting aid according to claim 8 including an orifice plate in said fuel inlet, said orifice plate having an orifice through which the fuel flows from the inlet to the tubular body.
10. A starting aid for assisting the starting of an internal combustion engine comprising the combination and arrangement of parts substantially as hereinbefore described with reference to the accompanying drawings.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8112718A GB2078853B (en) | 1980-07-02 | 1981-04-24 | Fuel burning intake air heater for internal combustion engines |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8021633 | 1980-07-02 | ||
GB8112718A GB2078853B (en) | 1980-07-02 | 1981-04-24 | Fuel burning intake air heater for internal combustion engines |
Publications (2)
Publication Number | Publication Date |
---|---|
GB2078853A true GB2078853A (en) | 1982-01-13 |
GB2078853B GB2078853B (en) | 1984-03-07 |
Family
ID=26276064
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB8112718A Expired GB2078853B (en) | 1980-07-02 | 1981-04-24 | Fuel burning intake air heater for internal combustion engines |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2078853B (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2535792A1 (en) * | 1982-11-09 | 1984-05-11 | Lucas Ind Plc | AUXILIARY ELECTRIC STARTER FOR INTERNAL COMBUSTION ENGINE AND METHOD OF MAKING SAME |
FR2536509A1 (en) * | 1982-11-24 | 1984-05-25 | Danfoss As | DEVICE EQUIPPED WITH A BURNER AND A HEAT EXCHANGER |
GB2130708A (en) * | 1982-11-24 | 1984-06-06 | Danfoss As | Liquid fuel burners |
WO1984004800A1 (en) * | 1983-05-20 | 1984-12-06 | Bosch Gmbh Robert | Device for injecting fuel into combustion chambers |
FR2606834A1 (en) * | 1986-11-15 | 1988-05-20 | Lucas Ind Plc | HEATING DEVICE FOR INTAKE MANIFOLD OF COMPRESSION IGNITION ENGINE |
-
1981
- 1981-04-24 GB GB8112718A patent/GB2078853B/en not_active Expired
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2535792A1 (en) * | 1982-11-09 | 1984-05-11 | Lucas Ind Plc | AUXILIARY ELECTRIC STARTER FOR INTERNAL COMBUSTION ENGINE AND METHOD OF MAKING SAME |
FR2536509A1 (en) * | 1982-11-24 | 1984-05-25 | Danfoss As | DEVICE EQUIPPED WITH A BURNER AND A HEAT EXCHANGER |
GB2130708A (en) * | 1982-11-24 | 1984-06-06 | Danfoss As | Liquid fuel burners |
WO1984004800A1 (en) * | 1983-05-20 | 1984-12-06 | Bosch Gmbh Robert | Device for injecting fuel into combustion chambers |
US4603667A (en) * | 1983-05-20 | 1986-08-05 | Robert Bosch Gmbh | Device for fuel injection in combustion chambers |
FR2606834A1 (en) * | 1986-11-15 | 1988-05-20 | Lucas Ind Plc | HEATING DEVICE FOR INTAKE MANIFOLD OF COMPRESSION IGNITION ENGINE |
Also Published As
Publication number | Publication date |
---|---|
GB2078853B (en) | 1984-03-07 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |