US20040140150A1 - System for reducing IR visibility of an amphibious vehicle - Google Patents

System for reducing IR visibility of an amphibious vehicle Download PDF

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Publication number
US20040140150A1
US20040140150A1 US10/714,239 US71423903A US2004140150A1 US 20040140150 A1 US20040140150 A1 US 20040140150A1 US 71423903 A US71423903 A US 71423903A US 2004140150 A1 US2004140150 A1 US 2004140150A1
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US
United States
Prior art keywords
exhaust gas
vehicle
nozzle
hot exhaust
water
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.)
Abandoned
Application number
US10/714,239
Inventor
Anton Strassgurtl
Bela Koleszar
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Steyr Daimler Puch Spezialfahrzeug AG and Co KG
Original Assignee
Steyr Daimler Puch Spezialfahrzeug AG and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Steyr Daimler Puch Spezialfahrzeug AG and Co KG filed Critical Steyr Daimler Puch Spezialfahrzeug AG and Co KG
Assigned to STEYR-DAIMLER-PUCH SPEZIALFAHRZEUG AG & CO. KG. reassignment STEYR-DAIMLER-PUCH SPEZIALFAHRZEUG AG & CO. KG. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KOLESZAR, BELA, STRASSGURTL, ANTON
Publication of US20040140150A1 publication Critical patent/US20040140150A1/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • F01N13/082—Other arrangements or adaptations of exhaust conduits of tailpipe, e.g. with means for mixing air with exhaust for exhaust cooling, dilution or evacuation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60F—VEHICLES FOR USE BOTH ON RAIL AND ON ROAD; AMPHIBIOUS OR LIKE VEHICLES; CONVERTIBLE VEHICLES
    • B60F3/00—Amphibious vehicles, i.e. vehicles capable of travelling both on land and on water; Land vehicles capable of travelling under water
    • B60F3/003—Parts or details of the vehicle structure; vehicle arrangements not otherwise provided for
    • B60F3/0053—Particular devices for gas circulation, e.g. air admission, cooling, water tightners
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63G—OFFENSIVE OR DEFENSIVE ARRANGEMENTS ON VESSELS; MINE-LAYING; MINE-SWEEPING; SUBMARINES; AIRCRAFT CARRIERS
    • B63G13/00—Other offensive or defensive arrangements on vessels; Vessels characterised thereby
    • B63G13/02—Camouflage
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/05—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of air, e.g. by mixing exhaust with air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
    • F41H3/00—Camouflage, i.e. means or methods for concealment or disguise
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63G—OFFENSIVE OR DEFENSIVE ARRANGEMENTS ON VESSELS; MINE-LAYING; MINE-SWEEPING; SUBMARINES; AIRCRAFT CARRIERS
    • B63G13/00—Other offensive or defensive arrangements on vessels; Vessels characterised thereby
    • B63G13/02—Camouflage
    • B63G2013/025—Camouflage using means for reducing radiation emission of electromagnetic waves, e.g. infrared, into air or water
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H21/00—Use of propulsion power plant or units on vessels
    • B63H21/32—Arrangements of propulsion power-unit exhaust uptakes; Funnels peculiar to vessels
    • B63H21/34—Arrangements of propulsion power-unit exhaust uptakes; Funnels peculiar to vessels having exhaust-gas deflecting means
    • 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

Definitions

  • the present invention relates to a water-going vehicle. More particularly this invention concerns a system for reducing the infrared visibility of an amphibious vehicle.
  • a particular problem facing military vehicles is in reducing their infrared visibility so that they do not form so-called hot spots that are easily detected at night by standard night-vision gear. It has been suggested to provide shielding for hot parts and means for mixing the hot exhaust gases with, for instance, coolant air. These expedients are often quite adequate when the vehicle is moving on land where other infrared emissions make accurate spotting of a relatively cool hot spot fairly difficult.
  • Another object is the provision of such an improved system for reducing the infrared visibility of an amphibious vehicle which overcomes the above-given disadvantages, that is which makes it very hard to spot even when on a body of water.
  • a system for reducing the infrared visibility of an amphibious vehicle that generates hot exhaust gas when it is in a body of water has according to the invention a nozzle directed is downward at and closely juxtaposed with a surface of the body of water. This nozzle expels the hot exhaust gas downward at the surface so as to form a water-droplet cloud that cools the gas and masks the vehicle.
  • the nozzle is set at an angle of at most 60° to vertical.
  • the jet of hot exhaust gas issuing from it is able to physically raise a substantial mist cloud.
  • means for mixing cool ambient air with the hot exhaust gas prior to expelling the hot exhaust gas from the nozzle.
  • This can be done by an ejector.
  • the outlet end of the exhaust system is formed as a nozzle directed into the end of a jet-type ejector that sucks in more air from outside. This simultaneously cools the exhaust gas while adding to it more air to increase the overall volume of is flow.
  • the nozzle itself forms a restriction such that the hot exhaust gas issues from it at high speed.
  • an amphibieus vehicle 1 is situated partially submerged in a body 2 of water.
  • This vehicle 1 has an exhaust system 3 with an outlet or tail pipe 4 that forms a nozzle 5 directed downward into an ejector tube 8 .
  • Air drawn in through the vehicle and deflected by vanes 7 moves as shown by arrows 6 into the inlet end of the ejector 8 , drawn by standard jet-pump action.
  • the outlet end of the ejector 8 is directed downward immediately adjacent the surface of the body 2 of water, at an angle a to the vertical of at most 60°.
  • the speed of the hot gas column exiting the lower end of the ejector 8 and its proximity to the surface of the body 2 is such that it raises a cloud 9 of water mist.
  • This cloud 9 serves to cool the hot gases exiting the ejector 8 by the latent heat of evaporation in the droplets forming the cloud 9 .
  • this cloud 9 itself masks the vehicle 1 so that a person on the other side of it using night-vision goggles will only see the cool cloud 9 , not the hot vehicle on the other side of this cloud 9 .

Abstract

A system for reducing the infrar d visibility of an amphibious vehicle that generates hot exhaust gas when it is in a body of water has a nozzle directed downward at and closely juxtaposed with a surface of the body of water. This nozzle expels the hot exhaust gas downward at the surface so as to form a water-droplet cloud that cools the gas and masks the vehicle. the nozzle is set at an angle of at most 60° to vertical.

Description

    FIELD OF THE INVENTION
  • The present invention relates to a water-going vehicle. More particularly this invention concerns a system for reducing the infrared visibility of an amphibious vehicle. [0001]
    • BACKGROUND OF THE INVENTION
  • A particular problem facing military vehicles, in particular armored amphibious ones, is in reducing their infrared visibility so that they do not form so-called hot spots that are easily detected at night by standard night-vision gear. It has been suggested to provide shielding for hot parts and means for mixing the hot exhaust gases with, for instance, coolant air. These expedients are often quite adequate when the vehicle is moving on land where other infrared emissions make accurate spotting of a relatively cool hot spot fairly difficult. [0002]
  • When, however, the vehicle is moving over a body of water, it is much more difficult to mask the hot spot it creates, as the vehicle is against a cool and homogenous background. The best known means are relatively ineffective when the hot vehicle is on the water. Thus when crossing a river, for example, an amphibious vehicle is seriously exposed. [0003]
    • OBJECTS OF THE INVENTION
  • It is therefore an object of the present invention to provide an improved system for reducing the infrared visibility of an amphibious vehicle. [0004]
  • Another object is the provision of such an improved system for reducing the infrared visibility of an amphibious vehicle which overcomes the above-given disadvantages, that is which makes it very hard to spot even when on a body of water. [0005]
    • SUMMARY OF THE INVENTION
  • A system for reducing the infrared visibility of an amphibious vehicle that generates hot exhaust gas when it is in a body of water has according to the invention a nozzle directed is downward at and closely juxtaposed with a surface of the body of water. This nozzle expels the hot exhaust gas downward at the surface so as to form a water-droplet cloud that cools the gas and masks the vehicle. [0006]
  • By the simple expedient of using the energy in the hot stream of exhaust gas that the vehicle creates to form a mist cloud, it is possible simultaneously to exploit the latent heat of vaporation of the droplets in the cloud to cool the exhaust gas, and to use this cool cloud to actually mask the vehicle. The result is that, when water-borne, the vehicle according to the invention is not highly visible in the infrared spectrum. [0007]
  • According to the invention the nozzle is set at an angle of at most 60° to vertical. Thus the jet of hot exhaust gas issuing from it is able to physically raise a substantial mist cloud. [0008]
  • According to the invention means is provided for mixing cool ambient air with the hot exhaust gas prior to expelling the hot exhaust gas from the nozzle. This can be done by an ejector. Thus the outlet end of the exhaust system is formed as a nozzle directed into the end of a jet-type ejector that sucks in more air from outside. This simultaneously cools the exhaust gas while adding to it more air to increase the overall volume of is flow. The nozzle itself forms a restriction such that the hot exhaust gas issues from it at high speed.[0009]
    • BRIEF DESCRIPTION OF THE DRAWING
  • The above and other objects, features, and advantages will become more readily apparent from the following description, reference being made to the accompanying drawing whose sole FIGURE is a partly schematic and diagrammatic view of the instant invention. [0010]
    • SPECIFIC DESCRIPTION
  • As seen in the drawing an [0011] amphibieus vehicle 1 is situated partially submerged in a body 2 of water. This vehicle 1 has an exhaust system 3 with an outlet or tail pipe 4 that forms a nozzle 5 directed downward into an ejector tube 8. Air drawn in through the vehicle and deflected by vanes 7 moves as shown by arrows 6 into the inlet end of the ejector 8, drawn by standard jet-pump action.
  • According to the invention the outlet end of the [0012] ejector 8 is directed downward immediately adjacent the surface of the body 2 of water, at an angle a to the vertical of at most 60°. The speed of the hot gas column exiting the lower end of the ejector 8 and its proximity to the surface of the body 2 is such that it raises a cloud 9 of water mist.
  • This [0013] cloud 9 serves to cool the hot gases exiting the ejector 8 by the latent heat of evaporation in the droplets forming the cloud 9. In addition this cloud 9 itself masks the vehicle 1 so that a person on the other side of it using night-vision goggles will only see the cool cloud 9, not the hot vehicle on the other side of this cloud 9.

Claims (5)

We claim:
1. In an amphibious vehicle that generates hot exhaust gas, a system for reducing the infrared visibility of the vehicle when it is in a body of water, the system comprising
means including a nozzle directed downward at and closely juxtaposed with a surface of the body of water for expelling the hot exhaust gas downward at the surface so as to form a wetter-droplet cloud, whereby the cloud cools the gas and masks the vehicle.
2. The system defined in claim 1 wherein the nozzle is set at art angle of at most 60° to vertical.
3. The system defined in claim 1, further comprising
means for mixing cool ambient air with the hot exhaust gas prior to expelling the hot exhaust gas from the nozzle.
4. The system defined in claim 1 wherein the mixing means includes an ejector.
5. The system defin d in claim 1 wherein the nozzle forms a restriction such that the hot exhaust gas issues from it at high speed.
US10/714,239 2002-11-27 2003-11-14 System for reducing IR visibility of an amphibious vehicle Abandoned US20040140150A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATGM799/2002 2002-11-27
AT0079902U AT7027U1 (en) 2002-11-27 2002-11-27 DEVICE FOR REDUCING INFRARED EMISSION IN AMPHIBIOUS VEHICLES, IN PARTICULAR TANK VEHICLES

Publications (1)

Publication Number Publication Date
US20040140150A1 true US20040140150A1 (en) 2004-07-22

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Family Applications (1)

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US10/714,239 Abandoned US20040140150A1 (en) 2002-11-27 2003-11-14 System for reducing IR visibility of an amphibious vehicle

Country Status (4)

Country Link
US (1) US20040140150A1 (en)
EP (1) EP1424223A1 (en)
AT (1) AT7027U1 (en)
PL (1) PL363399A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007023218A1 (en) * 2005-08-26 2007-03-01 Dcns Armed stealth surface vessel
RU2658197C1 (en) * 2017-07-05 2018-06-19 Александр Александрович Котровский Method of increasing the speed of movement of the combat amphibious vehicle on water
RU2658198C1 (en) * 2017-07-05 2018-06-19 Александр Александрович Котровский Method of reducing the thermal visibility of the combat vehicle when crossing the water obstacle
RU184045U1 (en) * 2018-07-09 2018-10-12 Федеральное государственное бюджетное учреждение "Центральный научно-исследовательский испытательный институт инженерных войск" Министерства обороны Российской Федерации COASTAL DISTORTION MASKING DEVICE

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2898387A1 (en) 2006-03-13 2007-09-14 Giat Ind Sa Exhaust gas cooling device for e.g. combat vehicle`s thermal engine, has injecting unit arranged at level of outlet of exhaust gas pipe and injecting coolant in form of colloid or in form of droplet in flow of exhaust gas

Citations (11)

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Publication number Priority date Publication date Assignee Title
US3815360A (en) * 1971-04-16 1974-06-11 Rohr Industries Inc Combined infrared and sound suppressor for aircraft jet engine
US4004416A (en) * 1970-03-16 1977-01-25 United Technologies Corporation Infra-red suppressor for use with turbo-shaft engine
US4100994A (en) * 1976-07-15 1978-07-18 Penn Yan Boats, Incorporated Marine exhaust silencer
US4184566A (en) * 1978-05-10 1980-01-22 Maritec Corporation Marine engine noise suppressor
US4265332A (en) * 1979-06-21 1981-05-05 Fmc Corporation Heat extracting muffler system
US4355507A (en) * 1979-08-09 1982-10-26 Her Majesty The Queen In Right Of Canada, As Represented By The Minister Of National Defence System for infrared emission suppression (sires)
US4993314A (en) * 1976-02-20 1991-02-19 The United States Of America As Represented By The Secretary Of The Navy Convectively cooled hot gas exhaust structure to reduce infrared radiation
US5545063A (en) * 1993-01-21 1996-08-13 Haynes; Hendrick W. Chambered anti-Coanda jet marine propulsion device with gaseous boundary layer for a thrust jet flow stream exhibiting staged controlled boundary layer separation properties, vessel trim adjustment, and movable thrust vector application points(s)
US6010379A (en) * 1997-06-06 2000-01-04 Blohm + Voss Gmbh Exhaust gas system for ocean-going vessels, preferably for military purposes
US6253540B1 (en) * 1982-07-08 2001-07-03 General Electric Company Removable baffle infrared suppressor
US20040074980A1 (en) * 2001-03-23 2004-04-22 Anders Ekelof Method and device for generating a liquid mist

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4607562A (en) * 1978-07-21 1986-08-26 Leblanc James C Armored vehicle drive train
DE3147475A1 (en) * 1981-12-01 1983-07-28 Alfons Dr.rer.nat. 8000 München Aßfalg Process for the infrared camouflaging of hot disposal orifices of vehicles, appliances and fixed installations and device for carrying out the process

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4004416A (en) * 1970-03-16 1977-01-25 United Technologies Corporation Infra-red suppressor for use with turbo-shaft engine
US3815360A (en) * 1971-04-16 1974-06-11 Rohr Industries Inc Combined infrared and sound suppressor for aircraft jet engine
US4993314A (en) * 1976-02-20 1991-02-19 The United States Of America As Represented By The Secretary Of The Navy Convectively cooled hot gas exhaust structure to reduce infrared radiation
US4100994A (en) * 1976-07-15 1978-07-18 Penn Yan Boats, Incorporated Marine exhaust silencer
US4184566A (en) * 1978-05-10 1980-01-22 Maritec Corporation Marine engine noise suppressor
US4265332A (en) * 1979-06-21 1981-05-05 Fmc Corporation Heat extracting muffler system
US4355507A (en) * 1979-08-09 1982-10-26 Her Majesty The Queen In Right Of Canada, As Represented By The Minister Of National Defence System for infrared emission suppression (sires)
US6253540B1 (en) * 1982-07-08 2001-07-03 General Electric Company Removable baffle infrared suppressor
US5545063A (en) * 1993-01-21 1996-08-13 Haynes; Hendrick W. Chambered anti-Coanda jet marine propulsion device with gaseous boundary layer for a thrust jet flow stream exhibiting staged controlled boundary layer separation properties, vessel trim adjustment, and movable thrust vector application points(s)
US6010379A (en) * 1997-06-06 2000-01-04 Blohm + Voss Gmbh Exhaust gas system for ocean-going vessels, preferably for military purposes
US20040074980A1 (en) * 2001-03-23 2004-04-22 Anders Ekelof Method and device for generating a liquid mist

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007023218A1 (en) * 2005-08-26 2007-03-01 Dcns Armed stealth surface vessel
FR2890041A1 (en) * 2005-08-26 2007-03-02 Dcn Sa FUR SURFACE SHIP VESSEL
US20080216727A1 (en) * 2005-08-26 2008-09-11 Dcns Stealth Armed Surface Ship
US8069800B2 (en) 2005-08-26 2011-12-06 Dcns Stealth armed surface ship
RU2658197C1 (en) * 2017-07-05 2018-06-19 Александр Александрович Котровский Method of increasing the speed of movement of the combat amphibious vehicle on water
RU2658198C1 (en) * 2017-07-05 2018-06-19 Александр Александрович Котровский Method of reducing the thermal visibility of the combat vehicle when crossing the water obstacle
RU184045U1 (en) * 2018-07-09 2018-10-12 Федеральное государственное бюджетное учреждение "Центральный научно-исследовательский испытательный институт инженерных войск" Министерства обороны Российской Федерации COASTAL DISTORTION MASKING DEVICE

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Publication number Publication date
EP1424223A1 (en) 2004-06-02
AT7027U1 (en) 2004-07-26
PL363399A1 (en) 2004-05-31

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Legal Events

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AS Assignment

Owner name: STEYR-DAIMLER-PUCH SPEZIALFAHRZEUG AG & CO. KG., A

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:STRASSGURTL, ANTON;KOLESZAR, BELA;REEL/FRAME:014710/0798

Effective date: 20031104

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION