GB2178482A - Air intake temperature control systems for internal combustion engines - Google Patents
Air intake temperature control systems for internal combustion engines Download PDFInfo
- Publication number
- GB2178482A GB2178482A GB08516116A GB8516116A GB2178482A GB 2178482 A GB2178482 A GB 2178482A GB 08516116 A GB08516116 A GB 08516116A GB 8516116 A GB8516116 A GB 8516116A GB 2178482 A GB2178482 A GB 2178482A
- Authority
- GB
- United Kingdom
- Prior art keywords
- air
- control system
- duct
- heated
- air intake
- 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
- 238000002485 combustion reaction Methods 0.000 title claims description 6
- 239000003570 air Substances 0.000 claims abstract description 73
- 239000012080 ambient air Substances 0.000 claims abstract description 24
- 239000000463 material Substances 0.000 claims abstract description 14
- 239000004033 plastic Substances 0.000 claims abstract description 13
- 229920003023 plastic Polymers 0.000 claims abstract description 13
- 238000013022 venting Methods 0.000 claims abstract description 11
- 239000000203 mixture Substances 0.000 claims abstract description 6
- 238000010438 heat treatment Methods 0.000 claims description 5
- 239000004952 Polyamide Substances 0.000 claims description 4
- 229920002647 polyamide Polymers 0.000 claims description 4
- 238000010276 construction Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 abstract description 3
- 238000002844 melting Methods 0.000 abstract description 3
- 238000013021 overheating Methods 0.000 abstract description 3
- 230000000740 bleeding effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
-
- 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
- F02M31/04—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating combustion-air or fuel-air mixture
- F02M31/06—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating combustion-air or fuel-air mixture by hot gases, e.g. by mixing cold and hot air
- F02M31/064—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating combustion-air or fuel-air mixture by hot gases, e.g. by mixing cold and hot air pneumatically controlled
-
- 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)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
Abstract
A control system in which a valve means 4 is operable to admit a variable mixture of heated and ambient air to the engine air intake duct is provided with venting means 15, 16 in the heated air duct 6 in order to overcome the problem of overheating of the valve means and associated ducting when the valve is operated to restrict the flow of heated air B. The venting means may comprise holes 16 or slots 15 in the heated air duct 6 adjacent the valve means 4 and admits ambient air to mix with and cool the heated air sufficiently to prevent melting of the valve means and ducting which may be moulded from plastics materials. <IMAGE>
Description
SPECIFICATION
Improvements in or relating to air intake temperature control systems for internal combustion engines
This invention relates to air intake temperature control systems for internal combustion engines.
It is known for the air intake temperature to be controlled by means of a valve operable to admit a variable mixture of heated air and ambient air to an engine air intake duct, the heated air being derived by drawing air through a hot air duct connected to an oven which may for example be heated by engine exhaust gases by means of a jacket surrounding the exhaust manifold.
It has hitherto been a problem that when the valve is operated to restrict the admission of heated air to the intake duct the reduction of air flow through the hot air duct has resulted in an escalation of air temperature within the hot air duct with consequent overheating of the valve means and of the adjacent ducting.
This is disadvantageous since it is desirable for ease of manufacture to use plastics materials for the ducting and the valve means and such materials typically have melting temperatures which have been found to be exceeded in extreme engine operating conditions such as when idling after use at maximum power and at relatively high ambient air temperatures.
According to the present invention an air intake temperature control system for an internal combustion engine having an air intake duct, an ambient air supply duct, a heated air duct connected to an air heating oven and a valve means operable to admit a variable mixture of heated and ambient air to the air intake duct from the heated and ambient air ducts respectively includes venting means for admitting ambient air into the heated air duct.
Preferably the venting means is adjacent the valve means and conveniently the venting means comprises at least one aperture in the side wall of the heated air duct.
Advantageously the venting means comprises a plurality of apertures spaced circumferentially around the heated air duct and the or at least one of the apertures may conveniently be cicular alternatively the or at least one of the apertures may be a slot.
The control system may advantageously include a valve means comprising a flap valve of a plastics material.
Preferably the heated air duct includes a first portion adjacent the valve means, a second portion connected to the air heating oven and connecting means for connecting the first and second portions wherein the first portion is of a plastics material.
According to a further aspect of the invention there is disclosed a ducting apparatus for use in a control system as hereinbefore disclosed and including an air intake duct, an ambient air duct and the first portion of the heated air duct of integral construction and a plastics material.
Preferably the plastics material is polyamide.
The invention as hereinbefore disclosed overcomes the problem of the heated air adjacent the valve means reaching an excessively elevated temperature when the heated air flow is restricted by allowing ambient aìr to be admitted to thereby reduce the air temperature.
The invention thereby facilitates the use of plastics materials in the control system and ducting apparatus with consequent advantages in cost and ease of assembly.
A particular embodiment of the invention will now be described with reference to the accompanying drawings of which:
Figure 1 is an elevation of an air intake temperature control system, and
Figure 2 is a part sectional elevation of the control system of Fig. 1 showing detail of the valve means and adjacent ducting.
The control system of Fig. 1 includes an air intake duct 1 supplying air at a controlled temperature to an air cleaner 2 through which air is drawn by the engine (not shown). An ambient air duct 3 supplies an ambient air flow A to the intake duct via a valve means 4 which comprises a flap valve 5 shown as a dotted line in a position in which ambient air flow is restricted.
A heated air duct 6 supplies a heated air flow B to the intake duct 1 via the valve means 4, the three ducts 1,3,6 being joined in a T-junction with the flap valve 5 being movable as shown by the dotted line 7 to admt a variable mixture of heated and ambient air.
A thermal sensor 8 within the air cleaner controls a valve actuator 9 and thereby regulates the air temperature in the air cleaner.
The thermal sensor 8 is a thermo-responsive air bleed valve and the valve actuator 8 is a vacuum motor having a diaphragm, the two being connected in line with a vacuum source provided by the engine (not shown) such that the sensor 8 varies the vacuum supplied to the actuator 8 by bleeding air at a predetermined temperature into the vacuum control line 10. The actuator 9 then moves the flap valve accordingly to adjust the mixture of ambient and heated air.
The heated air duct 6 has a first portion 11 of plastics material adjacent the valve means 4 and a second portion 12 of metallic material connected to an air heating oven 13, the first and second portions 11, 12 being connected by means of co-operating screw threads 14.
The oven 13 operates by admitting ambient air to a jacket surrounding the engine exhaust
manifold (not shown) and heated air is then drawn into the heated air duct 6.
The heated air duct 10 has a slot 15 and a circular hole 16 which comprise venting means adjacent the valve means 4 and serve to admit ambient air to the heated air duct.
Referring to Fig. 2 the flap valve 5 is shown in a position in which heated air flow is restricted, the flap valve being rotatable about a pivot 17 and actuated by means of a linkage 18 driven by the actuator 9. In this position a residual restricted flow of heated air passes from the heated air duct 6 into the intake duct 1 due to imperfect sealing of the flap valve and ambient air is drawn through the apertures to mix with and cool the heated air.
Overheating of the flap valve and adjacent ducting is thereby avoided.
In a particular experiment to simulate engine conditions of idling after use at maximum power and under conditions of relatively high ambient air conditions the use of such apertures achieved a reduction in heat air temperature adjacent the valve means of the order of 20 degrees Celsius. Such a reduction in temperature was sufficient to avoid melting of plastics materials having a melt temperature of 260 degrees Celsius whilst still enabling heated air temperatures exceeding 200 degrees Celsius to be supplied to the intake duct
1.
The intake duct 1, ambient air duct 3 and the first portion 11 of the heated air duct 6 are integrally moulded from polyamide and together comprise a ducting apparatus. The flap valve 5 is similarly of polyamide.
It will be apparent that various other embodiments of the invention are possible. For example the control system may be manually operated to select heated or ambient air.
Claims (12)
1. An air intake temperature control system for an internal combustion engine having an air intake duct, an ambient air supply duct, a heated air duct connected to an air heating oven and a valve means operable to admit a variable mixture of heated and ambient air to the air intake duct from the heated and ambient air ducts respectively including venting means for admitting ambient air into the heated air duct.
2. A control system as claimed in claim 1 wherein the venting means is adjacent the valve means.
3. A control system as claimed in either of claims 1 and 2 wherein the venting means comprises at least one aperture in the side wall of the heated air duct.
4. A control system as claimed in either of
claims one and two wherein the venting
means comprises a plurality of apertures spaced circumferentially around the heated air duct.
5. A control system as claimed in either of claims 3 and 4 wherein the or at least one of the apertures is circular.
6. A control system as claimed in either of claims 3 and 4 wherein the or at least one of the apertures is a slot.
7. A control system as claimed in any preceding claims including valve means comprising a flap valve of a plastics material.
8. A control system as claimed in any preceding claim wherein the heated air duct includes a first portion adjacent the valve means, a second portion connected to the air heating oven and connecting means for connecting the first and second portions wherein the first portion is of a plastics material.
9. Ducting apparatus for use in a control system as claimed in claim 8 including an air intake duct, an ambient air duct anW the first portion of the heated air duct of integral construction and of a plastics material.
10. Ducting apparatus as claimed in either of claims 8 and 9 wherein the plastics material is polyamide.
11. An air intake temperature control system for an internal combustion engine substantially as hereinbefore described and as shown in the accompanying drawings.
12. Ducting apparatus for use in an air intake temperature control system substantially as hereinbefore described and as shown in the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08516116A GB2178482B (en) | 1985-06-26 | 1985-06-26 | Improvements in or relating to air intake temperature control systems for internal combustion engines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08516116A GB2178482B (en) | 1985-06-26 | 1985-06-26 | Improvements in or relating to air intake temperature control systems for internal combustion engines |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8516116D0 GB8516116D0 (en) | 1985-07-31 |
| GB2178482A true GB2178482A (en) | 1987-02-11 |
| GB2178482B GB2178482B (en) | 1988-12-21 |
Family
ID=10581329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08516116A Expired GB2178482B (en) | 1985-06-26 | 1985-06-26 | Improvements in or relating to air intake temperature control systems for internal combustion engines |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2178482B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT201700119992A1 (en) * | 2017-10-23 | 2019-04-23 | Prinoth Spa | TRACKED VEHICLE FOR THE PREPARATION OF SKI SLOPES |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1259986A (en) * | 1968-01-17 | 1972-01-12 | Filterwerke Mann & Hummel G M B H | Device for automatically regulating the temperature of intake air |
| GB1307000A (en) * | 1969-05-31 | 1973-02-14 | Fram Corp | Fluid valve assembly |
| GB1385587A (en) * | 1972-05-04 | 1975-02-26 | Gen Motors Ltd | Internal combustion engine air intakes |
| GB1534765A (en) * | 1976-01-22 | 1978-12-06 | Gen Motors Ltd | Internal combustion engine air cleaners |
| GB2071205A (en) * | 1980-03-10 | 1981-09-16 | Gen Motors Ltd | Internal combustion engine air intake temperature control systems |
| GB2114657A (en) * | 1981-12-08 | 1983-08-24 | Volzh Ob Proizv | Heated and unheated air intake system of an I.C. engine air cleaner |
-
1985
- 1985-06-26 GB GB08516116A patent/GB2178482B/en not_active Expired
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1259986A (en) * | 1968-01-17 | 1972-01-12 | Filterwerke Mann & Hummel G M B H | Device for automatically regulating the temperature of intake air |
| GB1307000A (en) * | 1969-05-31 | 1973-02-14 | Fram Corp | Fluid valve assembly |
| GB1385587A (en) * | 1972-05-04 | 1975-02-26 | Gen Motors Ltd | Internal combustion engine air intakes |
| GB1534765A (en) * | 1976-01-22 | 1978-12-06 | Gen Motors Ltd | Internal combustion engine air cleaners |
| GB2071205A (en) * | 1980-03-10 | 1981-09-16 | Gen Motors Ltd | Internal combustion engine air intake temperature control systems |
| GB2114657A (en) * | 1981-12-08 | 1983-08-24 | Volzh Ob Proizv | Heated and unheated air intake system of an I.C. engine air cleaner |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT201700119992A1 (en) * | 2017-10-23 | 2019-04-23 | Prinoth Spa | TRACKED VEHICLE FOR THE PREPARATION OF SKI SLOPES |
| WO2019082065A1 (en) * | 2017-10-23 | 2019-05-02 | Prinoth S.P.A. | Crawled vehicle for the preparation of ski pistes |
| US11473514B2 (en) | 2017-10-23 | 2022-10-18 | Prinoth S.P.A. | Crawled vehicle for the preparation of ski pistes |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8516116D0 (en) | 1985-07-31 |
| GB2178482B (en) | 1988-12-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11655749B2 (en) | Oxygen sensor cooling duct | |
| US5269264A (en) | Engine ventilation in an automotive vehicle | |
| EP1186758B1 (en) | Internal combustion engine having combustion heater | |
| RU2169286C2 (en) | Internal combustion engine with fire heater | |
| US5404842A (en) | Internal combustion engine cooling apparatus | |
| EP0942159A2 (en) | Internal combustion engine having combustion heater | |
| SE466068B (en) | DEVICE FOR CONTROL OF THE EXHAUST TEMPERATURE AT AN INCORPORATION ENGINE WITH EXHAUST SYSTEM AND CATALYST | |
| US20030198564A1 (en) | Two-piece motor cooling and exhaust diluting blower housing | |
| GB2278068A (en) | Catalytic converter system | |
| US3983697A (en) | Exhaust gas cleaning system for internal combustion engines | |
| GB2178482A (en) | Air intake temperature control systems for internal combustion engines | |
| JPS6154313A (en) | Air conditioner for automobile | |
| US3913544A (en) | Induction air temperature control apparatus for an internal combustion engine | |
| US5176201A (en) | Vehicular air conditioner with manually operated bypass door operable only in full cool mode | |
| US4009701A (en) | Internal combustion engine having provisions for heating the fuel-air mixture by means of the exhaust | |
| JPS6079149A (en) | Intake gas heating device in internal-combustion engine for car | |
| GB1480828A (en) | Ambulances | |
| US6178938B1 (en) | Combustion heater for internal combustion engine | |
| JPS63141818A (en) | Warming device for vehicle | |
| US5549872A (en) | Apparatus for purifying engine exhaust gas | |
| US20230033292A1 (en) | Power and heat generator system and related methods | |
| KR100513452B1 (en) | Angle control apparatus for cooling pin of inter-cooler | |
| IT8921975A1 (en) | PRE-HEATING DEVICE. | |
| SU861706A1 (en) | System for heating transport vehicle engine before starting | |
| JP3528593B2 (en) | Internal combustion engine having a combustion heater |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19990626 |