GB2265416A - Valve control of fluid flow temperature. - Google Patents
Valve control of fluid flow temperature. Download PDFInfo
- Publication number
- GB2265416A GB2265416A GB9306037A GB9306037A GB2265416A GB 2265416 A GB2265416 A GB 2265416A GB 9306037 A GB9306037 A GB 9306037A GB 9306037 A GB9306037 A GB 9306037A GB 2265416 A GB2265416 A GB 2265416A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- heat exchanger
- outlet
- fluid
- temperature
- 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
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/01—Control of temperature without auxiliary power
- G05D23/13—Control of temperature without auxiliary power by varying the mixing ratio of two fluids having different temperatures
- G05D23/1386—Control of temperature without auxiliary power by varying the mixing ratio of two fluids having different temperatures for steam and liquid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
- F02M31/02—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating
- F02M31/16—Other apparatus for heating fuel
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/06—Fuel or fuel supply system parameters
- F02D2200/0606—Fuel temperature
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Temperature-Responsive Valves (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
A valve 61 can control the temperature of duel passing from a tank to the injector(s) of a diesel engine. The spool valve member 67, adjustably biassed by a spring 80, is movable by a temperature sensor 79 to control fuel flow from inlet 71 to outlets 72 and 79. The outlet 72 is connected to a heat exchanger 75 to which engine coolant or lubricant can be supplied via inlet 76 and outlet 77. Depending on the temperature of fuel flowing to the engine the sensor 79 regulates the proportion of fuel which flows through the heat exchanger 75 or flows via to the outlet 79 so as to provide fuel of generally constant temperature. The valve (10, Figs 2 and 3) may be secured to one end of a modular heat exchanger (11). <IMAGE>
Description
A Valve and a Fluid Temperature Control Svstem The present invention relates to a variable rate control valve which operates in response to changes in temperature of a fluid flow, and to a temperature control system for a fluid flow which can incorporate the valve.
In particular though not exclusively a variable rate valve according to the present invention can be used to control the flow of diesel engine fuel through a heat exchanger in which the fuel oil is heated by a flow of engine lubricating oil through the heat exchanger. Other fluid mediums could be used, such as water or other coolant, at an appropriate temperature.
The present invention seeks to provide a variable rate valve which can be adjusted to vary the amount of fuel oil bypassing the heat exchanger in order to control the temperature of the fuel oil flowing from the heat exchanger and an improved fluid flow temperature control system.
The present invention provides a fluid temperature regulating assembly including a valve having an inlet and two outlets, a supply of fluid connecting to the inlet, a heat exchanger having an inlet and an outlet, a first one of said valve outlets being connected to the inlet of the heat exchanger and the other one of the valve outputs being ports connected to an outlet duct to which the outlet of the heat exchanger is connected, flow in the outlet duct influencing a transducer operative to influence the valve to proportion flow between its two outlets.
The load applying means can comprise a spring bearing at one end against the closure member and at the opposite end against the variable position seating.
The invention also provides an engine having a fluid fuel supply, and an associated heated fluid source, in combination with a fluid fuel supply temperature regulating system including a heat exchanger connectable in fluid flow communication with said fluid source, a fuel supply path from a fuel tank passing through a temperature sensitive valve which, in the event that fuel supply temperature is too low acts to pass the or a proportion of the fuel flow through the heat exchanger to be heated.
Desirably the heat sensing part of the valve is downstream of the heat exchanger and the valve can act to vary the proportion of fuel which passes through or bypasses the heat exchanger.
The invention also provides a control valve having a body, a valve member movable within the body and an inlet port and two outlets ports in the body, the valve member being operable, in response to temperature changes, to apportion outward flow between the two outlet ports.
One of the outward ports can lead to a heat exchange wherein fluid can be heated and the other can lead to a bypass connected to an outlet from the heat exchanger.
The outlet of the heat exchanger can lead to a temperaturesensing transducer which acts to displace the valve member.
The valve member can be biassed against the action of the transducer by a spring or like means. The means can be adjustable in order to regulate operation of the valve.
The invention includes, of course, a fluid temperature regulating assembly including a valve as aforesaid, a supply of fluid connected to said inlet, a heat exchanger having an inlet and an outlet, a first one of said ports connected to the inlet of the heat exchanger and the other one of the ports connected to the outlet of the heat exchanger, flow from the outlet of the heat exchanger influencing a transducer operative to displace the valve member.
The fluid can be diesel oil or any other fluid whose temperature needs regulation.
The variable rate valve can be used advantageously in association with an engine of the invention in which the heat exchanger utilising engine lubricating oil to heat diesel fuel to a desired temperature. It is advantageous that diesel fuel is pre-heated to an optimum temperature prior to combustion so as to improve combustion efficiency and reduce the emissions of carbon monoxide, nitrogen oxides and particulate.
The variable rate valve according to the invention can be located in the fuel oil outlet of the heat exchanger so as to control the amount of fuel oil which bypasses the heat exchanger.
The variable rate valve can have a heat sensor which operates as a function of the temperature of the fuel oil leaving the heat exchanger and the degree of compression of the spring in the valve is adjusted so that the valve meters the correct amount of by-pass fuel oil in order to achieve the desired fuel oil temperature.
The present invention will now be more particularly described with reference to the accompanying drawings in which,
Figure 1 is a schematic view illustrating a preferred valve of the invention in use in a fluid temperature regulating assembly of the invention; and
Figure 8 is an enlarged cross sectional view of a preferred valve of the invention with a heat exchanger; and
Figure 9 is a view of the valve similar to that of figure 8 but in a different condition.
Referring now to Figure 1 of the drawings it will be seen that a preferred valve (61) of the invention (only shown schematically in figure 1) forms part of a temperature regulating control assembly (62) of the invention which regulates the temperature of fluid flowing from a source (63) to a consumer (64). The source can be a pressurised diesel fuel supply line and the consumer (64) can be the injector or injectors of a diesel engine. The valve (61) has a housing (65) within which is a bore (66) which slidable accommodates a spool valve member (67) which has a central stem (68) and upper and lower annular lands (69) and (70).
An inlet port (71) leads to the annular space between the stem (68) and bore (66). A first lower outlet port (72) and a second upper outlet port (73) are provided. The lower outlet port (72) leads .to the inlet (74) of the heat exchanger (75) which can supply heat to the fluid passing through it by heat exchange from a hot fluid entering and leaving at respective ducts (76) and (77). Alternatively, (for example, in very cold conditions ) the heat exchanger (75) can include a direct source of heat such as an electrically powered heater. The heat exchanger has an outlet (78). The upper outlet port (73) connects with a bypass (79) which connects with the outlet (78) of the heat exchanger (75).
Fluid flowing from the outlet (78) to the consumer (64) passes a thermally sensitive transducer (79) which displaces the valve member (68) in relation to temperature changes within the outlet (78). Such movements are resisted by a compression spring (80) which can be regulated by a turnable threaded plug (81).
The entire effect of the system is to provide a flow of fuel to the consumer (64) (a flow of usually diesel oil), which is of generally constant temperature and (usually) higher than the temperature of the source. The temperature to the consumer is desirably kept constant even though the temperature of the source (63) may vary.
Referring now to figures 2 and 3 it will be seen that a preferred valve (10) of the invention is adapted to be used in combination with a modular heat exchanger indicated at (11) which will be described in detail later.
The valve (10) has a body (12). The body (12) has an inlet (13) for diesel oil from a diesel tank and an outlet (14) leading to diesel injectors of the engine. The inlet (13) leads via a passage (15) to a valve chamber (16) within which is movable a spool (17) of a spool valve member (18). The valve chamber (16) has opposite valve seats (19) (20) with which opposite ends of the spool (17) can co-operate. Valve seat (20) surrounds a flow passage (21) leading from the chamber (16) into the heat exchanger (11). Valve seat (19) surrounds a flow passage (22) connected with an outlet flow passage (23) which leads to the outlet (14).
The spool valve member (18) has an upper spindle (24) and a lower spindle (25). The upper spindle (24) carries a slide (26) which is guided by a guide surface (27).
In a similar manner the spindle (25) carries a slide (28) which engages a guide surface (29). The two slides (26) and (28) ensure linear movement of the spool valve member (18).
The spool valve member (18) is biassed (upwardly in the drawings) by means of a compression spring (30) bearing against the slide (28). Slide (26) is engaged by a piston (31) of a sensor which has a body (32) disposed in the flow channel (23).
The heat exchanger (11) includes a cylindrical jacket (33) which has an inlet (34) for engine lubricating oil and an outlet (35).
Baffles (36) constrain the flow of engine lubricating oil to a sinuous path indicated by dotted lines at (36). The longitudinal divisions constrain fuel oil entering by a passage (21) to a sinuous path indicated in chain dotted lines at (37). The arrangement of the two paths (36) and (37) is to ensure efficient thermal contact between the two flows and efficient heating of the diesel oil. Of course, heat exchange experts will be able to produce many different flow configurations to suit different circumstances.
The end of the jacket (33) remote from the valve (10) is closed by a cap (38). In order to accommodate engines of different size and requirements, jackets (33) of different lengths can be provided with inserts also of different lengths which define the sinuous paths. Thus, heat exchangers varying in capacity can be provided by such a module system.
When the incoming diesel fuel is cold, a low temperature prevails in the passage (23) and this causes the sensor body (32) to contract withdrawing the piston (31). This allows the spring (30) to drive the valve member (18) upwards. Thus flow via valve seat (19) is prevented and all the diesel fuel passes through valve seat (20) via passage (21) into the heat exchanger.
In the other extreme position (shown in figure 3) the outlet flow via passage (23) is hot. The piston (31) has expanded and drives the spool valve member downwards against the action of the spring (30). In this condition the spool (17) contacts valve seat (20) prevents flow via passage (21) and causes flow from the inlet (13) to be along passage (22) directly into the passage (23) which leads to the outlet (14).
Although the "cold" situation of figure 2 will often prevail, particularly in winter during start-up, the hot situation will seldom apply and during most of the operation of the system of the invention situations intermediate the two extremes will prevail. In such intermediate situations the spool (17) will proportion the flow of oil between passages (21) and (22) so as to achieve a mix of oil in passage (23) which is of a constant desired temperature.
By appropriate selection of sizes of the components and the strength of the spring and the strength of the sensor body, a pre-determined output temperature can be selected fairly easily.
If it should be desired to vary this in practice (this is felt to be rarely desirable) it is possible to vary the position of the body (32) by alternating its relationship with closure cap (38). Similarly, if the action of the spring needs to be altered this can be effected by changing its relationship with its closure cap (39). For example by increasing its penetration into the cap, or by shimming or the like.
It will be appreciated that the valve of the invention is desirably part of the system for ensuring a constant temperature supply of fluid from a source to a consumer, particularly of diesel fuel from a tank to injectors.
They can, of course, be used in many different comparable applications where a constant temperature supply of fluid is required.
The invention is not limited to precise details of the foregoing and variations can be made thereto.
Claims (20)
1. A fluid temperature regulating assembly including a valve
having an inlet and two outlets, a supply of fluid
connecting to the inlet, a heat exchanger having an inlet
and an outlet, a first one of said valve outlets being
connected to the inlet of the heat exchanger and the other
one of the valve outputs being ports connected to an outlet
duct to which the outlet of the heat exchanger is
connected, flow in the outlet duct influencing a transducer
operative to influence the valve to proportion flow between
its two outlets.
2. An assembly as claimed in claim 1 wherein the fluid is
diesel oil.
3. An engine having a fluid fuel supply, and an associated
heated fluid source, in combination with a fluid fuel
supply temperature regulating system including a heat
exchanger connectable in fluid flow communication with said
fluid source, a fuel supply path from a fuel tank passing
through a temperature sensitive valve which, in the event
that fuel supply temperature is too low acts to pass fuel
through the heat exchanger to be heated.
4. A combination as claimed in claim 3, wherein a heat sensing
part of the valve is downstream of the heat exchanger and
the valve can act to vary the proportion of fuel which
passes through the heat exchanger.
5. A combination as claimed in claims 3 or 4, wherein the
heated fluid source is engine coolant or lubricant.
6. A combination as claimed in claims 3, 4 or 5 wherein the
heat exchanger and valve are connected together and the
heat exchanger is modular allowing its capacity to be
varied to suit different engines.
7. A fluid temperature regulating assembly substantially as
described with reference to the accompanying drawings.
8. A combination of an engine and a fuel supply temperature
regulating system substantially as described with reference
to the accompanying drawings.
9. A variable rate control valve comprising a valve body, a
valve closure member located and moveable in the body,
inlet and outlet flow ports in the body and variable load
applying means to apply a load to the closure member, the
closure member being operable in response to temperature
changes in a fluid flow against the applied load.
10. A valve as claimed in claim 9 wherein the load applying
means comprises a spring bearing at one end against the
closure member and at the opposite end against a variable
position seating.
11. A control valve having a body, a valve member movable
within the body and an inlet port and two outlets ports in
the body, the valve member being operable, in response to
temperature changes, to apportion outward flow between the
two outlet ports.
12. A valve as claimed in claim 9 wherein one of the outward
ports leads to a heat exchange wherein fluid can be heated
and the other leads to a bypass connected to an outlet from
the heat exchanger.
13. A valve as claimed in claim 12 wherein the outlet of the
heat exchanger leads to a temperature sensing transducer
which acts to displace the valve member.
14. A valve as claimed in claim 13, wherein the valve member is
biassed against the action of the transducer.
15. A valve as claimed in claim 14, wherein the biassing means
is adjustable in order to regulate operation of the valve.
16. A valve substantially as described with reference to the
accompanying drawings.
17. A valve as claimed in any of claims 9 to 15 in combination
with an engine in which a heat exchanger is used to heat
diesel fuel to a desired temperature.
18. A combination as claimed in claim 17, wherein the valve is
located in the fuel oil outlet of the heat exchanger so as
to control the amount of fuel oil which bypasses the heat
exchanger.
19. A combination as claimed in claims 17 or 18 wherein the
valve has a heat sensor which operates as a function of the
temperature of the fuel oil leaving the heat exchanger and
the valve is adjustable so that the valve meters the
correct amount of by-pass fuel oil in order to achieve the
desired fuel oil temperature.
20. A combination as claimed in any of claims 17 to 19
substantially as described with reference to the
accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB929206337A GB9206337D0 (en) | 1992-03-24 | 1992-03-24 | Valve 11 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB9306037D0 GB9306037D0 (en) | 1993-05-12 |
| GB2265416A true GB2265416A (en) | 1993-09-29 |
| GB2265416B GB2265416B (en) | 1995-08-30 |
Family
ID=10712684
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB929206337A Pending GB9206337D0 (en) | 1992-03-24 | 1992-03-24 | Valve 11 |
| GB9306037A Expired - Fee Related GB2265416B (en) | 1992-03-24 | 1993-03-23 | A fluid temperature regulating assembly |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB929206337A Pending GB9206337D0 (en) | 1992-03-24 | 1992-03-24 | Valve 11 |
Country Status (1)
| Country | Link |
|---|---|
| GB (2) | GB9206337D0 (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1005748A (en) * | 1960-10-21 | 1965-09-29 | Mads Clausen | Improvements in or relating to flow control valves |
| US4401091A (en) * | 1981-07-24 | 1983-08-30 | Modine Manufacturing Company | Temperature controlled fuel heater |
| EP0317485A2 (en) * | 1987-11-13 | 1989-05-24 | Turbex 2000, S.A. | Gasifying, economizing, decontaminating and power enhancing apparatus for improving the operation of engines, appliances, burners and equipment which use solid, liquid or gaseous fuels |
| US5036825A (en) * | 1990-10-11 | 1991-08-06 | Parker Hannifin Corporation | Compact high efficiency fuel heater with integral thermostatic control |
| US5042447A (en) * | 1990-10-11 | 1991-08-27 | Parker Hannifin Corporation | Thermostatically controlled fuel heater and cooler |
| GB2252362A (en) * | 1991-02-01 | 1992-08-05 | Fuel Economy Corp Ltd | Engine fuel heating and oil filtration |
| EP0499781A1 (en) * | 1991-02-20 | 1992-08-26 | Mercedes-Benz Ag | Fuel circulation with thermostatically controlled fuel-preheating, particularly for air-compressing fuel injection-type internal combustion engines |
-
1992
- 1992-03-24 GB GB929206337A patent/GB9206337D0/en active Pending
-
1993
- 1993-03-23 GB GB9306037A patent/GB2265416B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1005748A (en) * | 1960-10-21 | 1965-09-29 | Mads Clausen | Improvements in or relating to flow control valves |
| US4401091A (en) * | 1981-07-24 | 1983-08-30 | Modine Manufacturing Company | Temperature controlled fuel heater |
| EP0317485A2 (en) * | 1987-11-13 | 1989-05-24 | Turbex 2000, S.A. | Gasifying, economizing, decontaminating and power enhancing apparatus for improving the operation of engines, appliances, burners and equipment which use solid, liquid or gaseous fuels |
| US5036825A (en) * | 1990-10-11 | 1991-08-06 | Parker Hannifin Corporation | Compact high efficiency fuel heater with integral thermostatic control |
| US5042447A (en) * | 1990-10-11 | 1991-08-27 | Parker Hannifin Corporation | Thermostatically controlled fuel heater and cooler |
| GB2252362A (en) * | 1991-02-01 | 1992-08-05 | Fuel Economy Corp Ltd | Engine fuel heating and oil filtration |
| EP0499781A1 (en) * | 1991-02-20 | 1992-08-26 | Mercedes-Benz Ag | Fuel circulation with thermostatically controlled fuel-preheating, particularly for air-compressing fuel injection-type internal combustion engines |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9306037D0 (en) | 1993-05-12 |
| GB2265416B (en) | 1995-08-30 |
| GB9206337D0 (en) | 1992-05-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20010323 |