WO1998035849A1 - Systeme de circulation de fluide pour automobiles - Google Patents

Systeme de circulation de fluide pour automobiles Download PDF

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Publication number
WO1998035849A1
WO1998035849A1 PCT/US1997/005763 US9705763W WO9835849A1 WO 1998035849 A1 WO1998035849 A1 WO 1998035849A1 US 9705763 W US9705763 W US 9705763W WO 9835849 A1 WO9835849 A1 WO 9835849A1
Authority
WO
WIPO (PCT)
Prior art keywords
fluid
pressure
impeller
valve
power
Prior art date
Application number
PCT/US1997/005763
Other languages
English (en)
Inventor
Rashaid Ali Albader
Original Assignee
Rashaid Ali Albader
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 Rashaid Ali Albader filed Critical Rashaid Ali Albader
Publication of WO1998035849A1 publication Critical patent/WO1998035849A1/fr

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Classifications

    • 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
    • B60K25/00—Auxiliary drives
    • B60K25/02—Auxiliary drives directly from an engine shaft
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/32—Cooling devices
    • B60H1/3204—Cooling devices using compression

Definitions

  • This invention relates to a fluid circulating system for a vehicle and more particularly to an air conditioning system that operates at a constant power level with increased reliability regardless of engine speed.
  • Air conditioning and other fluid transport mechanisms are highly desirable and, in some instances, an essential feature in modern automobiles and other vehicles.
  • a compressor is used to pressurize and propel a volatile refrigerant such as Freon through a closed-loop system.
  • a cooling coil is provided in the closed loop within the passenger compartment of the vehicle. The com ⁇
  • the air conditioning compressor in most vehicles is powered by direct inter- connection with the engine which, in most cases, is an internal combustion engine powered by gasoline, diesel fuel or a similar combustible compound.
  • the compressor is an internal combustion engine powered by gasoline, diesel fuel or a similar combustible compound.
  • a power transmission belt provided between a pulley on the compressor and an associated driving pulley on the
  • the driving pulley is, similarly, connected with a variety of other engine com-
  • ponents including a water circulation pump, a cooling fan, and an electrical generator or alternator.
  • the engine's driving pulley is usually driven directly from the crankcase
  • the air conditioning compressor pulley is driven at a proportionate idle speed. Conversely, when the engine is driven at a cruising speed at, for example, 4,000 RPM, the compressor is driven at approximately four times the idle speed.
  • a typical air conditioning compressor is operated by simply engaging an air
  • conditioning-on switch which causes an electrical clutch in the compressor's pulley to
  • tioning cooling output For example, at idle, the compressor's cooling output can be
  • this output can be approximately 36,000 BTU.
  • the air conditioner may not be
  • an object of this invention to provide an air conditioning system for vehicles that operates at a substantially constant speed and cooling output regard- less of engine speed. It is a further object of this invention to provide an air condition ⁇
  • Cooling output by the system should not be excessive at
  • This invention provides an improved automotive air conditioning system that
  • a reservoir having fluid is provided.
  • a pump is interconnected to the reservoir and operatively interconnected with, and
  • a pressure chamber is interconnected with the pump and receives fluid from the pump.
  • a fluid drive element located relative to the
  • a regulator maintains a selected level of pressure in the pressure chamber.
  • the regulator operates by diverting excess fluid from the pres ⁇
  • the regulator includes a check valve that opens in
  • the regulator system can also include a control valve, typically having
  • the pressure in the chamber to be varied by a user in order to, likewise, vary the pres ⁇
  • valve can be a movable stop and spring that biases the movable stop into a sealed ori ⁇
  • the spring imparts a force that is overcome by a predetermined pressure in
  • the fluid pump can comprise a first impeller that is en ⁇
  • the manifold pipe having three inlets is attached to the casing.
  • the manifold pipe includes
  • the first impeller is attached to a source of motive power for a vehicle such as an engine.
  • the second impeller drives a
  • vehicle fluid circulating pump such as an air conditioning compressor, a power steering
  • the first regulator valve can be a pressure-operated
  • the second regulator valve can be a control valve that regulates fluid flow through the
  • the first control valve and the second control valve can each be inter ⁇
  • a reservoir can be provided at any point within the fluid path to absorb
  • FIG. 1 is a schematic view of an air conditioning system according to this in ⁇
  • FIG. 2 is a partially-exposed schematic perspective view of a control valve for
  • FIG. 3 is a partially-exposed schematic perspective view of the control valve of
  • FIG. 2 operating at a vehicle cruising speed
  • FIG. 4 is a partially-exposed schematic perspective view of the control valve of
  • FIG. 2 operating at a high vehicle speed
  • FIG. 5 is a graph comparing the operation of a conventionally-driven air condi-
  • FIG. 6 is a schematic cross section of a self-contained fluid pump-driving sys ⁇
  • FIG. 7 is an exploded perspective view of the fluid pump-driving system of Fig.
  • FIG. 1 While this embodiment relates to an air conditioning compressor, a
  • the system 20 is part of an overall
  • automotive power system including an engine 22 that powers a drive shaft 24 for
  • the engine comprises an inter ⁇
  • the engine 22 according to this embodiment also includes a front power takeoff 28
  • the power takeoff 28 includes a pulley 32 that drives a power transmission belt 34 interconnected
  • the pulley set 36 is used to power a generator 38 via
  • an additional power transmission belt 40 An additional power transmission belt 40.
  • a variety of components can be intercon ⁇
  • a water pump, a cooling fan, a power steering pump, and, of course, an air conditioning compressor can all be linked by associated belts that are in rota-
  • takeoffs can be provided to the front of the engine using gears located within a gear
  • the generator 38 powers a battery 42 for reserve electrical energy.
  • the generator 38 and battery 42 are used, in part, to power auxiliary
  • the power takeoff 28 is interconnected with another drive pulley 48 that, in
  • the pulley 48 drives a power transmission belt 50 that is interconnected with
  • the pulley 52 is intercon ⁇
  • the air conditioning system 20 will now be described in further detail.
  • the air conditioning system 20 includes an air conditioning compressor 60 that is
  • the condenser 66 circulates a refrigerant through a closed-loop comprising an output line 62 and a return line 64 that are interconnected with a condenser 66.
  • the condenser 66 is provided ad ⁇
  • blower fan ered into the cockpit of the vehicle (not shown) in the form of cool air.
  • fan speed control 69 is electrically powered and interconnected with a fan speed control 69 on a control console 71.
  • fan speed controls such as rheostats, potentiometers and digi ⁇
  • tal/microprocessor speed controls can be utilized.
  • the compressor 60 according to this embodiment is similar or identical in form
  • the final drive pulley 52 is connected directly with the final drive pulley 52. Rather, the final drive pulley 52 is connected by drive shaft 54 to a compressor or pump 70 that is adapted to drive a fluid
  • the pump can comprise a piston, impeller or other mechanism for
  • the fluid can be any fluid that can transfer mechanical energy to a fluid.
  • the fluid can be any fluid that can transfer mechanical energy to a fluid.
  • the fluid can be any fluid that can transfer mechanical energy to a fluid.
  • the pump 70 derives energy from the drive shaft 54 which, in turn, is powered
  • the illustrated system 20 is, thus, to be taken only by way
  • the pump 70 receives fluid through an inlet port 72 that is interconnected with
  • ized fluid in the compression chamber 78 is routed selectively through a variety of channels that, in substance, control the operation of the air conditioning system 20 according to this invention.
  • the primary outlet of the chamber 78 is a turbine housing 90
  • the turbine blade is impelled by the fluid under pressure.
  • the fluid causes the
  • the rotation of the turbine blade 92 can be controlled and/or en ⁇
  • the pressure chamber 78 and turbine 92 are sized and structured so that at an idle speed, a minimum acceptable
  • waste ports 100, 102 act to control the
  • control waste port 102 that is electrically con ⁇
  • the temperature control switch 106 can comprise any acceptable control including, but not limited to, a digital control, a microprocessor, a
  • the temperature control 106 transmits signals on the
  • wires 104 to selectively open and close a valve 1 10 located at the waste port 102.
  • valve 110 can comprise any acceptable valve mechanism that is electrically or mechani-
  • a mechanically controlled valve may be operated by a me ⁇
  • valve 110 opens and
  • control waste port 102 and valve 1 10 can variably control the cham ⁇
  • pressure in the chamber 78 also varies based upon the speed of operation of the
  • the regulating waste port 100 includes a check valve
  • valve 112 is signaled to open and direct
  • valve 112 is detailed in a fully closed (FIG. 2), partially opened (FIG. 3) and fully opened (FIG. 4) state of operation.
  • valve 112 is a form of check valve.
  • 112 consists of an inlet 116 that enables fluid (see arrows 118) to enter the valve
  • the inlet 116 can include a seal or other structure that engages a moving
  • the stop 122 is a hemispherical plug. It is
  • stops can include an elastomeric or metallic ball, a cylinder, a cone or
  • the stop 122 in this embodiment is biased against the inlet 116, in a sealed
  • the spring 124 in this embodiment comprises a com-
  • pression spring that surrounds a spring guide 125 that is joined to the stop 122.
  • the guide 125 maintains the spring 124 and stop 122 in alignment with the housing 120 as
  • the stop 122 moves relative to the housing 120.
  • the spring constant of the compression spring 124 is chosen so that the stop
  • valve 112 ensures that the pressure of fluid present in the
  • the stop 122 is partially opened by the fluid pressure and a portion of
  • the stop 122 is biased into a completely-opened position and a majority of fluid (arrows 132) is delivered through the line 114.
  • any remaining pressure is routed through either the turbine 92 or the
  • control valve 110 and check valve 112. The system, by means of these 3 outlets,
  • the system's components e.g., check valve force, control valve opening size, chamber
  • excess driving force in the form of fluid pressure, is routed away from the tur- bine 92 so that the turbine is not driven at an excessive, potentially-damaging, speed.
  • the system is set so that, at minimum engine RPM, a minimum driving
  • level of pressure is set at a predetermined "equilibrium" value that is constant through-
  • the compressor is driven at a constant speed regardless of engine speed.
  • auxiliary driving power may be re ⁇
  • the primary advantage of the system of the air conditioning system 20, according to this embodiment, is that excessive driving of the air conditioner system at high RPM is avoided. Likewise, the passage of pressurized fluid from the fluid cham ⁇
  • the graph illustrates the difference between a
  • the increasing curve 150 represents the RPMs of a di ⁇
  • the per- formance of the compressor according to this embodiment is illustrated by the substantially-flat line 152 showing a compressor speed of approximately 3,000 RPM
  • conditioner compressor speed can be obtained according to this invention.
  • Fig. 6 illustrates a self-contained vehicle fluid pump-driving system
  • the system omits an enlarged in-line reservoir such as the reservoir 74 of Fig. 1.
  • the system 200 includes a casing 202 that, as detailed in Fig. 7 can be provided in two halves 204 and 206. The casing in this em ⁇
  • bodiment is cylindrical, however, any acceptable outer shape is contemplated, and ap ⁇
  • the casing 202 defines three separate chambers 208, 210 and 212. In this embodiment, the cham ⁇
  • bers are open to one another through the center bore of the casing 202.
  • a series of inner perimeter walls 214 and 216 are provided to separate the chambers.
  • pair of walls 214 and 216 is mounted a respective rotor or impeller 220 and 222.
  • rotors detailed have multi-bladed fan-shape, however any acceptable shape that enables
  • the rotor 220 is interconnected with a driven shaft 230.
  • the driven shaft 230 is interconnected with a driven shaft 230.
  • shaft 230 is interconnected with a power take off pulley 234.
  • the pulley is intercon ⁇
  • the driven shaft 230 can be directly driven by the motor or by some other rotating portion of the vehicle such as a
  • the opposite impeller 222 is interconnected with a driving shaft 240
  • the driving shaft 240 is interconnected with a fluid-circulating pump 250 that can comprise an air
  • the casing 202 is jointed to a manifold pipe 260.
  • the manifold pipe includes three openings 262, 264 and 266 adjacent each of the respective chambers 208, 210
  • Hydraulic fluid can be added through a stopcock or plug 280 in the casing 202.
  • a reservoir (not shown, but similar
  • stopcock 280 This reservoir maintains a predetermined fluid level in the system 200.
  • Each of the valves 290 and 292 includes a
  • the baffles can be operated mechanically, hydraulically or electrically
  • Control stems 298 and 300 are interconnected to a controller as detailed in Fig. 6. Control stems 298 and 300 are interconnected to a controller as detailed in Fig. 6. Control stems 298 and 300 are interconnected to a controller as detailed in Fig. 6. Control stems 298 and 300 are interconnected to a controller as detailed in Fig. 6. Control stems 298 and 300 are interconnected to a controller as detailed in Fig. 6. Control stems 298 and 300
  • FIG. 7 can be provided to mechanically (rotatably) interconnect the baffles with an
  • baffles are shown in this embodiment, it is contemplated that any acceptable valve such as a ball valve, a plug valve or a butterfly valve can be
  • the driven impeller 220 rotates to cause fluid to move from the chamber 208 into the chamber 210.
  • Pressure within the chamber 210 is regulated in
  • the valve 296 serves as a gate to enable
  • valve 296 When the driving shaft 240 requires power to operate a pump, the valve 296
  • the valve 294 or casing 202 can include a pressure sensor 304 that can be interconnected with the controller.
  • shaft 230 is driven at high speed, it may be necessary to bleed off some pressure to
  • the driving shaft 230 is driven at low speed, it may be necessary to close the valve 294
  • valve 296 can be omitted and the valve 294 can be used
  • the valve 294 can be controlled mechanically by an external actuator, or it can be interconnected with a spring assembly similar to that described for the valve 100 in Fig. 1. As such, the valve 294 can act as a safety valve to bleed off excess pressure. It should be clear that the system 200 of this embodiment, like that described above with reference to Fig. 1, provides an even driving force for the pump 250 regardless of the input power from the engine. This enables more efficient operation of fluid-driven components and accessories on a vehicle without the undesirable effects brought on by engine acceleration and deceleration.
  • check valve utilized herein is a mechanical ball-and-spring-type valve with a stop that seals against an inlet.
  • a rotating valve or another type of valve that opens selectively in response to pressure can be substituted.
  • an electrically operated-valve that opens and closes in response to a
  • sensed pressure in the pressure chamber can also be substituted.
  • a valve would include a pressure transducer or other sensor within the pressure chamber and would be directed to open and close to allow a predetermined volume of fluid to escape for a predetermined time based upon the sensed pressure in the chamber.
  • the fluid pump of this invention is connected to the engine, it can also be connected to other portions of the drive train such as the transmission or wheel axles.
  • a reservoir can be provided in each of the above-described embodiments to absorb excess fluid pressure at any point along the fluid flow path where desirable. As such, this description is meant to be taken only by way of example and not to otherwise limit the scope of the invention.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

L'invention concerne un système de circulation de fluide pour automobiles. Ce système de circulation comprend une pompe de circulation de fluide (60). Un réservoir (74) renfermant un fluide peut être prévu. Une pompe (70) est reliée à ce réservoir (74) et raccordée, de manière opérationnelle, à un moteur (22) du véhicule, qui assure son entraînement. La chambre de pression (78) est reliée à la pompe (70) et reçoit un fluide de cette dernière. Un élément d'entraînement de fluide (92) placé de manière adjacente à la chambre de pression (78), et relié à la pompe de circulation (60) transforme un passage de fluide sous pression en force d'entraînement mécanique pour entraîner la pompe de circulation (60). Un régulateur maintient un niveau sélectionné de pression dans la chambre de pression et détourne le fluide en excédant provenant de la chambre de pression vers le réservoir, de telle sorte qu'une puissance utile constante est maintenue pour la pompe de circulation.
PCT/US1997/005763 1997-02-18 1997-04-07 Systeme de circulation de fluide pour automobiles WO1998035849A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US80240697A 1997-02-18 1997-02-18
US08/802,406 1997-02-18

Publications (1)

Publication Number Publication Date
WO1998035849A1 true WO1998035849A1 (fr) 1998-08-20

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1997/005763 WO1998035849A1 (fr) 1997-02-18 1997-04-07 Systeme de circulation de fluide pour automobiles

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2864497A1 (fr) * 2003-12-24 2005-07-01 Bosch Gmbh Robert Dispositif de freinage utilisant un servomoteur d'assistance au freinage alimente par un circuit de climatisation
RU2647392C1 (ru) * 2016-12-07 2018-03-15 Федеральное государственное бюджетное образовательное учреждение высшего образования "Казанский национальный исследовательский технический университет им. А.Н. Туполева-КАИ" (КНИТУ-КАИ) Климатическая система транспортного средства

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1528022A (en) * 1975-04-18 1978-10-11 Stieger H Fluid coupling
US5333679A (en) * 1992-06-19 1994-08-02 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Climate control system for motor vehicle
DE4320655A1 (de) * 1992-02-07 1995-01-05 Man Nutzfahrzeuge Ag Kraftfahrzeug mit einer Brennkraftmaschine und einem hydrostatisch-mechanischen Antrieb für Nebenaggregate

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1528022A (en) * 1975-04-18 1978-10-11 Stieger H Fluid coupling
DE4320655A1 (de) * 1992-02-07 1995-01-05 Man Nutzfahrzeuge Ag Kraftfahrzeug mit einer Brennkraftmaschine und einem hydrostatisch-mechanischen Antrieb für Nebenaggregate
US5333679A (en) * 1992-06-19 1994-08-02 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Climate control system for motor vehicle

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2864497A1 (fr) * 2003-12-24 2005-07-01 Bosch Gmbh Robert Dispositif de freinage utilisant un servomoteur d'assistance au freinage alimente par un circuit de climatisation
WO2005070740A2 (fr) * 2003-12-24 2005-08-04 Robert Bosch Gmbh Servomoteur d'assistance au freinage alimente par un circuit de climatisation
WO2005070740A3 (fr) * 2003-12-24 2006-10-12 Bosch Gmbh Robert Servomoteur d'assistance au freinage alimente par un circuit de climatisation
US7959237B2 (en) 2003-12-24 2011-06-14 Robert Bosch Gmbh Brake booster supplied by an air conditioning circuit
RU2647392C1 (ru) * 2016-12-07 2018-03-15 Федеральное государственное бюджетное образовательное учреждение высшего образования "Казанский национальный исследовательский технический университет им. А.Н. Туполева-КАИ" (КНИТУ-КАИ) Климатическая система транспортного средства

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