WO2009066314A2 - Bonnet with integrated air duct - Google Patents

Bonnet with integrated air duct Download PDF

Info

Publication number
WO2009066314A2
WO2009066314A2 PCT/IN2008/000491 IN2008000491W WO2009066314A2 WO 2009066314 A2 WO2009066314 A2 WO 2009066314A2 IN 2008000491 W IN2008000491 W IN 2008000491W WO 2009066314 A2 WO2009066314 A2 WO 2009066314A2
Authority
WO
WIPO (PCT)
Prior art keywords
bonnet
air
intercooler
air duct
integrated air
Prior art date
Application number
PCT/IN2008/000491
Other languages
French (fr)
Other versions
WO2009066314A3 (en
Inventor
Alok Kumar Ray
Chandrashekhar Vasant Kalambi
Parvej Alam Majhar Khan
Sandeep Mahavir Patil
Original Assignee
Mahindra & Mahindra Ltd.
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 Mahindra & Mahindra Ltd. filed Critical Mahindra & Mahindra Ltd.
Priority to EP08852708.0A priority Critical patent/EP2205479B1/en
Publication of WO2009066314A2 publication Critical patent/WO2009066314A2/en
Publication of WO2009066314A3 publication Critical patent/WO2009066314A3/en
Priority to ZA2010/01652A priority patent/ZA201001652B/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/08—Front or rear portions
    • B62D25/10—Bonnets or lids, e.g. for trucks, tractors, busses, work vehicles
    • B62D25/105—Bonnets or lids, e.g. for trucks, tractors, busses, work vehicles for motor cars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K13/00—Arrangement in connection with combustion air intake or gas exhaust of propulsion units
    • B60K13/06—Arrangement in connection with combustion air intake or gas exhaust of propulsion units using structural parts of the vehicle as ducts, e.g. frame parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K13/00—Arrangement in connection with combustion air intake or gas exhaust of propulsion units
    • B60K13/02—Arrangement in connection with combustion air intake or gas exhaust of propulsion units concerning intake

Definitions

  • the present innovation relates to the bonnet of an automobile, wherein, it has multiple functions. More particularly, the present invention relates to a bonnet encompassing an integral air duct to provide air to the intercooler of the engine / engine or any device which requires air for its functioning.
  • An intercooler in turbocharged and supercharged internal combustion engines requires air to provide a denser intake charge to the engine and allows more air and fuel to be combusted per engine cycle, increasing the output of the engine. This air requirement is fulfilled with a duct running between front opening at grille and intercooler. Kia Carens, Nissan Xtrial and Tata Indigo are the well-known carmakers who have provided a separate plastic duct under the bonnet, which carry airflow from front of engine to intercooler of engine. .
  • Car models of Nissan X-Trail and Tata Indigo have an intercooler mounted on the engine over its top-most part and just under the vehicle bonnet (or hood). There is a fairly large hollow plastic part, which is fastened to the underside of the bonnet forming a duct.
  • the front portion of this duct is either a single opening or split into two openings and in the bonnet-closed condition is positioned in front of the front grille.
  • the rear portion carries a seal, which seats over the top of the intercooler and overall forms a conduit for the cooling air.
  • the bonnet of the Audi car has a noise insulator, fastened to the underside of the bonnet. This insulator is shaped to provide an air passage to the engine intercooler.
  • Lamborghini car has front bumper with integrated air-intake for the front mounted oil cooler.
  • the air duct is made of plastic and not an integrated part of bonnet.
  • Aerodynamic benefits - utilizes air dragged in for intercooling purposes.
  • Figure (1) shows exploded view of bonnet with integrated air duct according to the present invention
  • Figure (2) shows cross sectional side view of bonnet with air duct and path of the airflow in the bonnet according to present invention.
  • the bonnet-outer surface (1) is made of sheet metal.
  • the reinforcing structure (2) is at the inner side of the bonnet and joined with the bonnet at its edges mechanically.
  • Oven hardening sealant is provided at the central portion at the joint of outer and inner surface of the bonnet.
  • the reinforcing structure is formed to provide a hollow space (3) as shown in figure 1.
  • the leading end of this hollow space is split up into two slots (4),
  • the trailing end of hollow space opens as a single square (5) on the upper side of the intercooler (7).
  • the bottom of this trailing square opening is fitted with a flexible rubber bejlow (6) which provides a continuous passage for air as well as a seal.
  • the intercooler a separate part (7), has a cover (8) mounted above it and it acts as a seat for flexible rubber bellow (6).
  • the front two slots of the air duct (snorkel) open out into the front grille (9) which carries two curved air guides (10), which in turn face the on-rushing air stream.
  • the normal functions of a conventional bonnet are static / passive in nature and it remains in its place after being closed. Dn closing the bonnet (1), the trailing square opening (5) . of the reinforcing structure (2) get connected to the intercooler . (7) through its cover (8) and flexible rubber bellow (6).
  • the front opening slots (4) of the reinforcement structure (2) of the bonnet panel (1) gets connected to the two air guides (10). This creates a complete leak proof air-conveying duct (snorkel) from the front of the vehicle leading to the intercooler core.
  • the bonnet by virtue of its design with air duct integrated within it, damps the noise emanating from the engine compartment. Its structure also absorbs the vibration inputs and does not give off any of its own noise due to this vibration as tested with CFD (Computational Fluid Dynamics) analysis.
  • the quantity of air passing through the bonnet is a function of the. overall pressure drop across the entire system.
  • the geometry of air guides, coefficient of friction, inner height of the air duct (space between the bonnet and reinforcement structure) ⁇ drag coefficient, length of the snorkel and surface area of intercooler core are the parameters which are considered to achieve effective design of the present invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Superstructure Of Vehicle (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Body Structure For Vehicles (AREA)

Abstract

The present invention consists of a bonnet of an automobile with an integrated air duct, which comprises of a main body of outside surface (1) and reinforcement structure forming the inner surface (2) and hollow air passage (3) form by joining of these surfaces extending from front of vehicle structure / grill (9) up to the intercooler area or engine intake and likewise.

Description

Technical Field:
The present innovation relates to the bonnet of an automobile, wherein, it has multiple functions. More particularly, the present invention relates to a bonnet encompassing an integral air duct to provide air to the intercooler of the engine / engine or any device which requires air for its functioning.
Prior Art:
An intercooler, in turbocharged and supercharged internal combustion engines requires air to provide a denser intake charge to the engine and allows more air and fuel to be combusted per engine cycle, increasing the output of the engine. This air requirement is fulfilled with a duct running between front opening at grille and intercooler. Kia Carens, Nissan Xtrial and Tata Indigo are the well-known carmakers who have provided a separate plastic duct under the bonnet, which carry airflow from front of engine to intercooler of engine. .
High torque generates high heat loads to the point where cooling of manual gearbox transmissions is necessary, transmission coolers are often provided by the vehicle manufacturer.
Car models of Nissan X-Trail and Tata Indigo have an intercooler mounted on the engine over its top-most part and just under the vehicle bonnet (or hood). There is a fairly large hollow plastic part, which is fastened to the underside of the bonnet forming a duct. The front portion of this duct is either a single opening or split into two openings and in the bonnet-closed condition is positioned in front of the front grille. The rear portion carries a seal, which seats over the top of the intercooler and overall forms a conduit for the cooling air. The bonnet of the Audi car has a noise insulator, fastened to the underside of the bonnet. This insulator is shaped to provide an air passage to the engine intercooler. Lamborghini car has front bumper with integrated air-intake for the front mounted oil cooler.
Other than these concepts, in the public domain, no patents relating to the present invention were found to the best of the knowledge of the applicant.
Deficiencies of Prior Art: .
1) Present designs do not integrate the air duct (snorkel) with bonnet to provide passage to air and stiffness to the bonnet in the required areas.
2) In automobiles, which have top mounted intercooler, the gap between the bonnet reinforcement and intercooler is very small and so it is difficult to introduce separate duct for passage of air to the intercooler. Addition of a duct introduces one more part in the vehicle and packaging in limited space was an issue. This difficulty resulted into the present invention.
3) In case of other vehicles mentioned above, the air duct is made of plastic and not an integrated part of bonnet.
Object of the Present Invention:
The main objects of the present invention are-
1. To create passage for the unobstructed flow of air to the intercooler of the . engine from the outside through front grill, when the vehicle is in motion.
2. To eliminate use of additional part like plastic etc for the purpose.
3. To utilize space under the bonnet effectively. Advantages of the Present Invention:
1) Aerodynamic benefits - utilizes air dragged in for intercooling purposes.
2) Reduction in number of parts by combining both bonnet and snorkel that is made up of metal.
, 3) The weight of the bonnet is reduced. . 4) Absorbs engine noise, vibration and buffeting due to airflow.
Description of the invention:
Description of figures:
Figure (1) shows exploded view of bonnet with integrated air duct according to the present invention,
Figure (2) shows cross sectional side view of bonnet with air duct and path of the airflow in the bonnet according to present invention.
The bonnet-outer surface (1) is made of sheet metal. The reinforcing structure (2) is at the inner side of the bonnet and joined with the bonnet at its edges mechanically. Oven hardening sealant is provided at the central portion at the joint of outer and inner surface of the bonnet. The reinforcing structure is formed to provide a hollow space (3) as shown in figure 1. The leading end of this hollow space is split up into two slots (4), The trailing end of hollow space opens as a single square (5) on the upper side of the intercooler (7). The bottom of this trailing square opening is fitted with a flexible rubber bejlow (6) which provides a continuous passage for air as well as a seal. The intercooler, a separate part (7), has a cover (8) mounted above it and it acts as a seat for flexible rubber bellow (6). The front two slots of the air duct (snorkel) open out into the front grille (9) which carries two curved air guides (10), which in turn face the on-rushing air stream. The normal functions of a conventional bonnet are static / passive in nature and it remains in its place after being closed. Dn closing the bonnet (1), the trailing square opening (5) . of the reinforcing structure (2) get connected to the intercooler . (7) through its cover (8) and flexible rubber bellow (6). The front opening slots (4) of the reinforcement structure (2) of the bonnet panel (1) gets connected to the two air guides (10). This creates a complete leak proof air-conveying duct (snorkel) from the front of the vehicle leading to the intercooler core.
As the vehicle moves forward, it displaces the air in front of it. A part of the displaced air is drawn into this air passage and directed over the intercooler core. This cooling air enters over the top face of the intercooler core and exits from its bottom and into the engine compartment and then onwards into the air stream passing from the underbody of the vehicle. The mass flow rate of the air increases with the forward velocity of the vehicle. In the event of a frontal collision with a stationary object or moving vehicle, reinforcement structure folds and collapses and thus absorbs a portion of the impact energy,. When the vehicle is running under various operating conditions, there are varied noise and vibration inputs due to the running engine, road inputs and airflow. The bonnet, by virtue of its design with air duct integrated within it, damps the noise emanating from the engine compartment. Its structure also absorbs the vibration inputs and does not give off any of its own noise due to this vibration as tested with CFD (Computational Fluid Dynamics) analysis.
The quantity of air passing through the bonnet is a function of the. overall pressure drop across the entire system. The geometry of air guides, coefficient of friction, inner height of the air duct (space between the bonnet and reinforcement structure)^ drag coefficient, length of the snorkel and surface area of intercooler core are the parameters which are considered to achieve effective design of the present invention.

Claims

We claim:
1. A bonnet of vehicle with an integrated air duct comprising
(a) a main body of outside surface and reinforcement structure.
(b) a hollow passage / duct formed in the bonnet extending from front of vehicle structure up to the top of intercooler / engine / any device requiring air for its normal functioning.
(c) An opening at front of bonnet as an inlet for introducing outside air to move through the front grill to the intercooler area / engine intake and likewise.
A bonnet with integrated air duct as hereinabove described in the specification with reference to the accompanying drawings. -
2. A bonnet with integrated air duct as claimed in claim 1, wherein both surfaces are fabricated in metal or reinforced plastics or composite material or any material or combination of these.
PCT/IN2008/000491 2007-08-08 2008-08-07 Bonnet with integrated air duct WO2009066314A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP08852708.0A EP2205479B1 (en) 2007-08-08 2008-08-07 Bonnet with integrated air duct
ZA2010/01652A ZA201001652B (en) 2007-08-08 2010-03-08 Bonnet with integrated air duct

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN1527MU2007 2007-08-08
IN1527/MUM/2007 2007-08-08

Publications (2)

Publication Number Publication Date
WO2009066314A2 true WO2009066314A2 (en) 2009-05-28
WO2009066314A3 WO2009066314A3 (en) 2009-12-30

Family

ID=40667939

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IN2008/000491 WO2009066314A2 (en) 2007-08-08 2008-08-07 Bonnet with integrated air duct

Country Status (3)

Country Link
EP (1) EP2205479B1 (en)
WO (1) WO2009066314A2 (en)
ZA (1) ZA201001652B (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2961162A1 (en) * 2010-06-11 2011-12-16 Peugeot Citroen Automobiles Sa Motor vehicle, has conduit delimited by external skin and interior lining of bonnet and extending between air inlet and air conditioner located at front part of vehicle, where air inlet is located at rear part of bonnet
DE102010038350A1 (en) 2010-07-23 2012-02-16 Bayerische Motoren Werke Aktiengesellschaft Cooling air guide assembly for motor vehicle i.e. motor car, has frame including frame component that is associated with air guide member for guiding air flow through cooler, where frame is made of metal
DE102012110923A1 (en) * 2012-11-14 2014-05-15 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Air supply for air filter for internal combustion engine of motor vehicle, has inlet opening formed in area of lock bridge, and fresh-air conduit connected with lock bridge below motor dust cover of engine compartment of motor vehicle
DE102013102027A1 (en) 2013-03-01 2014-09-04 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Intake air guide for internal combustion engine of motor vehicle, has front panel with air inlet opening and air outlet opening, where engine cover is displaced from operating position in open position
JP2023023627A (en) * 2021-08-05 2023-02-16 ダイハツ工業株式会社 Intake structure

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4385549A (en) 1980-07-02 1983-05-31 Volkswagenwerk Aktiengessellschaft Automobile ventilating apparatus
US6056075A (en) 1999-05-26 2000-05-02 Daimlerchrysler Corporation Hood with integrated cooling duct
US20020088656A1 (en) 2000-11-03 2002-07-11 Arctic Cat, Inc Air intake system for a vehicle

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2782480B1 (en) * 1998-08-24 2000-10-20 Solvay DEVICE AND METHOD FOR EXHAUSTING CALORIES FROM A COMPARTMENT
FR2798356B1 (en) * 1999-09-09 2001-10-26 Lorraine Laminage REINFORCED AND LIGHTWEIGHT AUTOMOBILE HOOD
US6988574B2 (en) * 2003-08-28 2006-01-24 Jones Performance Products, Inc. One-way air duct for engine compartment cooling

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4385549A (en) 1980-07-02 1983-05-31 Volkswagenwerk Aktiengessellschaft Automobile ventilating apparatus
US6056075A (en) 1999-05-26 2000-05-02 Daimlerchrysler Corporation Hood with integrated cooling duct
US20020088656A1 (en) 2000-11-03 2002-07-11 Arctic Cat, Inc Air intake system for a vehicle

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP2205479A4

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2961162A1 (en) * 2010-06-11 2011-12-16 Peugeot Citroen Automobiles Sa Motor vehicle, has conduit delimited by external skin and interior lining of bonnet and extending between air inlet and air conditioner located at front part of vehicle, where air inlet is located at rear part of bonnet
DE102010038350A1 (en) 2010-07-23 2012-02-16 Bayerische Motoren Werke Aktiengesellschaft Cooling air guide assembly for motor vehicle i.e. motor car, has frame including frame component that is associated with air guide member for guiding air flow through cooler, where frame is made of metal
DE102012110923A1 (en) * 2012-11-14 2014-05-15 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Air supply for air filter for internal combustion engine of motor vehicle, has inlet opening formed in area of lock bridge, and fresh-air conduit connected with lock bridge below motor dust cover of engine compartment of motor vehicle
DE102012110923B4 (en) * 2012-11-14 2017-10-19 Dr. Ing. H.C. F. Porsche Aktiengesellschaft air supply
DE102013102027A1 (en) 2013-03-01 2014-09-04 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Intake air guide for internal combustion engine of motor vehicle, has front panel with air inlet opening and air outlet opening, where engine cover is displaced from operating position in open position
DE102013102027B4 (en) 2013-03-01 2018-03-29 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Intake air duct for an internal combustion engine of a motor vehicle and motor vehicle
JP2023023627A (en) * 2021-08-05 2023-02-16 ダイハツ工業株式会社 Intake structure
JP7385634B2 (en) 2021-08-05 2023-11-22 ダイハツ工業株式会社 Intake structure

Also Published As

Publication number Publication date
WO2009066314A3 (en) 2009-12-30
ZA201001652B (en) 2010-11-24
EP2205479A4 (en) 2011-04-13
EP2205479B1 (en) 2016-05-25
EP2205479A2 (en) 2010-07-14

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