WO1991005675A1 - Commande d'embrayage pour accessoires de vehicule - Google Patents

Commande d'embrayage pour accessoires de vehicule Download PDF

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Publication number
WO1991005675A1
WO1991005675A1 PCT/AU1990/000482 AU9000482W WO9105675A1 WO 1991005675 A1 WO1991005675 A1 WO 1991005675A1 AU 9000482 W AU9000482 W AU 9000482W WO 9105675 A1 WO9105675 A1 WO 9105675A1
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WO
WIPO (PCT)
Prior art keywords
accessory
vehicle
control system
temperature
motor
Prior art date
Application number
PCT/AU1990/000482
Other languages
English (en)
Inventor
Andrew John Doig
Maurice Alafaci
Original Assignee
Andrew John Doig
Maurice Alafaci
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 Andrew John Doig, Maurice Alafaci filed Critical Andrew John Doig
Publication of WO1991005675A1 publication Critical patent/WO1991005675A1/fr

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Classifications

    • 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
    • B60H1/3205—Control means therefor
    • B60H1/3208—Vehicle drive related control of the compressor drive means, e.g. for fuel saving purposes

Definitions

  • the present invention relates generally to the efficient use of accessories fitted to motorized vehicles and in particular to the control of such accessories whereby a substantial portion of the energy required to drive the accessory is provided by the momentum of the vehicle while the vehicle is not being driven by its motor, hereinafter referred to as a backoff mode.
  • an air conditioning unit in an automobile is controlled to provide a substantial portion of its cooling during backoff periods when the accelerator pedal is released and the vehicle is moving under its own momentum.
  • US Patent 3186184 to Pruitt is the first of many patents which discloses switching off the power to the clutch of the car cooler during periods where high engine power is required, for example during overtaking other vehicles on the road or climbing steep hills.
  • Other patents disclose improvements to this system: US Patent 4155225 to Upchurch Jnr. uses a mercury switch to detect acceleration of the vehicle for controlling car cooler as stated in US Patent 3186184.
  • US Patent 4596121 to Ogata discloses a mechanical device for detecting high power demand on diesel engines for controlling the car cooler as stated above.
  • US Patent 4424682 to F.S. Miska & J.A. Duddles discloses a car-cooler device that uses a timed cyclic override at a preselected ambient temperature and vehicle speed.
  • the present invention consists in a control system for a vehicle accessory adapted to be driven by the engine of an automotive vehicle, the control system being
  • backoff mode will be used to describe an operating condition where the engine is not being used to power the vehicle but rather the momentum of the vehicle is turning the engine. In the case of an automobile the backoff mode occurs when the accelerator pedal is released while the vehicle is in motion.
  • backoff mode is sensed by detecting manifold pressure that is considered below normal idle manifold pressure.
  • the referred backoff mode is sensed by detecting a preselected range of throttle positions.
  • the referred backoff mode is detected by using an accelerometer such as a mercury switch to detect a condition of deceleration.
  • thermistor in conjunction with a stable voltage supply and selectable switching comparators to indicate an operational cabin temperature range window.
  • the internal cabin temperature is detected by the usage of an expandable chamber filled with a gas such that the expansion of the chamber is
  • this chamber actuating an electrical switch to activate (turn on) or deactivate (turn off) the switch at a set temperature.
  • the overriding effect is as follows:
  • the auto accessory is automatically shut off during periods when the operation of the engine approaches its maximum capacity as indicated by the occurrence of high pressure in the inlet manifold of the engine.
  • embodiments of the invention will be arranged to avoid response to false backoff mode signals by preventing signals which are shorter than a preselected length from being relayed to control of the auto accessory thereby saving clutch life and enhancing passenger comfort,
  • a heater is controlled such that heating is enabled when the cabin temperature is below the desired range window.
  • Embodiments of the present invention provide a car-cooler clutch control apparatus in which the
  • An. embodiment of the car-cooler apparatus comprises of a vacuum switch to sense backoff mode, a timing circuit, temperature sensor, an electronic logic circuit and relays.
  • Fig. 1 illustrates a circuit schematic for a voltage regulator subsystem of a preferred embodiment of an accessory control system
  • Fig. 2 illustrates a circuit schematic for a
  • Fig. 3 illustrates a circuit schematic for a vacuum subsystem of the preferred embodiment of an accessory control system
  • Fig. 4 illustrates a circuit schematic for a logic subsystem of the preferred embodiment of an accessory control system
  • Fig. 5 illustrates a circuit schematic for a
  • delay/driver subsystem of the preferred embodiment of an accessory control system of the preferred embodiment of an accessory control system.
  • Embodiments of the present invention provide an improved electronic detection and control system that switches the compressor of an automotive air conditioning system in such a way as to achieve required temperature control of the car's interior, increased responsiveness of the car during periods of high power demand, and improved fuel efficiency.
  • backoff mode preferentially switching on the air conditioning system compressor when the car's momentum is driving the engine.
  • backoff mode the accelerator pedal is not depressed whilst the vehicle is in gear and in motion (i.e., no additional fuel consumption is required to drive the air conditioning system's compressor).
  • the preferred embodiment of the invention has the capability of discriminating between extended periods of high power demands and short term or instantaneous high power demands (say less than a few seconds e.g., gear changes). In the event of instantaneous high power demands the compressor will not be switched off in order to preserve the longevity of the air
  • the temperature sensor installed in the interior of the car continuously monitors cabin temperature.
  • the driver can preselect the temperature at which the air conditioner should switch on and the preferred embodiment of the invention maintains the cabin temperature to below this preselected value (option 1).
  • the driver can select a temperature range to which the cabin should be maintained and the embodiment of the invention will control both the heater and air conditioner in such a way as to maintain the required temperature range (option 2).
  • the power supply and voltage regulator (PSVR) of the preferred embodiment is the power supply and voltage regulator (PSVR) of the preferred embodiment.
  • Voltage regulation is achieved using a standard three pin positive regulator IC10 (LM317) with a voltage setting of 8 Volts set by variable resistor R1 and fixed resistor R11 which form a divider network to set the level on the regulator reference input.
  • the regulation voltage of 8 Volts was chosen to provide an accurate reference voltage for the comparators used in the apparatus and to provide effective baissing of the
  • TDC temperature detection and control subsystem
  • HCOMP senses the LOWER temperature threshold of the car's interior and provides an ON
  • the LCOMP temperature threshold may be preselected by the user adjusting
  • variable resistor R2 to suit personal thermal
  • HCOMP senses the UPPER threshold temperature which provides an ON CONDITION at the output of IC11b when the temperature as sensed by the temperature transducer TT exceeds a nominal temperature of 27 degrees Celsius.
  • the HCOMP temperature threshold may be preselected by the user by adjusting variable resistor R3.
  • the TDC is arranged to achieve total climate control through the use of a third
  • This comparator "WCOMP” can be configured such that an ON CONDITION is provided at the output of IC11c when the temperature as sensed by the temperature transducer TT is below a certain nominal threshold, say 15 degrees
  • the WCOMP temperature threshold may be preselected by the user by adjusting variable resistor R4.
  • a temperature detection subsystem that includes the second form of the TDC enables total automatic temperature control to be achieved.
  • the user is able to select a "Thermal Comfort Zone" TCZ by varying resistors R2 and R4 to suit personal thermal comfort requirements based on individual metabolic rates (i.e., maintain cabin
  • comparator circuits LCOMP, HCOMP and WCOMP are respectively indicated by light emitting diodes LED1, LED2 and LED3, driven by transistors T1, T2 and T3.
  • a pressure transducer PT senses intake manifold vacuum levels in a range between 2 and 14 psi. The voltage output from this pressure
  • transducer is amplified by a differential amplifier and gain stage formed by operational amplifiers IC12a, IC12b, and IC14a. This output is then fed into two separate comparators “VCOMP” and "BCOMP" which switch at
  • the comparator VCOMP is configured to provide an ON CONDITION (+8 Volts) at the output of IC12c when the intake manifold pressure is
  • VCOMP will provide an OFF CONDITION (0 Volts). The output from VCOMP is fed into the logic subsystem together with the
  • the comparator BCOMP provides an ON CONDITION at the output of IC12d when the intake manifold pressure is GREATER THAN 13 psi (nominal). This particular ON
  • CONDITION DISABLES the output to the air conditioning system clutch control apparatus (see Fig. 5) turning the air conditioner off.
  • VCOMP and BCOMP thresholds can be set by the user by varying R5 and R6 respectively.
  • Light Emitting Diode LED4, driven by transistor T4 indicates the output state of the VCOMP comparator.
  • the logic subsystem is a CMOS network of four NAND gates IC13a,b,c and d, providing the following truth table as a function of (LCOMP, HCOMP,
  • Cabin temperature is less than 20 degrees Celsius irrespective of intake manifold pressure.
  • Intake manifold pressure is greater than 13 psi irrespective of
  • a delay and driver subsystem as illustrated in Fig. 5 is also provided and comprises a basic voltage comparator designed to provide an ON CONDITION at the output of IC11d a few seconds after a positive input is applied (say +8 Volts). This is achieved by an RC time constant circuit (R53 + C6) driven by transistor T6 which charges the RC circuit to a preselected reference voltage. The output of IC11d is duffered by transistor T5 to drive the
  • conditioning system relay to operate the compressor

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air-Conditioning For Vehicles (AREA)

Abstract

Dispositif de commande pour le système de conditionnement d'air d'un véhicule, utilisant un détecteur de pression d'échappement pour détecter les conditions de conduite où la demande en puissance est faible, notamment lors de l'utilisation du frein moteur. Pendant ces périodes, le système de conditionnement d'air utilise l'énergie fournie par la vitesse acquise du véhicule. A d'autres moments, où le moteur doit fournir une puissance accrue, le système de conditionnement d'air se déconnecte du moteur sauf quand la température de l'habitacle du véhicule dépasse une limite supérieure prédéterminée.
PCT/AU1990/000482 1989-10-11 1990-10-09 Commande d'embrayage pour accessoires de vehicule WO1991005675A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPJ682989 1989-10-11
AUPJ6829 1989-10-11

Publications (1)

Publication Number Publication Date
WO1991005675A1 true WO1991005675A1 (fr) 1991-05-02

Family

ID=3774273

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1990/000482 WO1991005675A1 (fr) 1989-10-11 1990-10-09 Commande d'embrayage pour accessoires de vehicule

Country Status (1)

Country Link
WO (1) WO1991005675A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4214701A1 (de) * 1992-05-02 1993-11-04 Hella Kg Hueck & Co Verfahren und vorrichtung zum steuern des kompressors einer klimaanlage in einem kraftfahrzeug
DE4336937A1 (de) * 1992-05-02 1995-05-04 Hella Kg Hueck & Co Verfahren und Vorrichtung zum Steuern des Kompressors einer Klimaanlage in einem Kraftfahrzeug
FR2743761A1 (fr) * 1996-01-19 1997-07-25 Poix Guy De Dispositif de commande de climatiseur de vehicules automobiles
WO1998007588A1 (fr) * 1996-08-22 1998-02-26 Volvo Lastvagnar Ab Dispositif et procede de regulation d'un compresseur d'air
FR2908938A1 (fr) * 2006-11-22 2008-05-23 Peugeot Citroen Automobiles Sa Systeme d'alimentation depuis un vehicule automobile d'un appareil electrique de type nomade
CN102466300A (zh) * 2010-11-18 2012-05-23 上海汽车集团股份有限公司 车辆空调的控制方法
US10625568B2 (en) 2015-10-09 2020-04-21 Volvo Truck Corporation Energy consumption of a multiple zone heating, ventilating and air conditioning system for a vehicle and method

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3459006A (en) * 1966-10-10 1969-08-05 Bosch Gmbh Robert Cooling apparatus for automotive vehicles
US4510764A (en) * 1982-12-03 1985-04-16 Diesel Kiki Co., Ltd. Control method for air conditioning systems for vehicles
US4606197A (en) * 1984-03-22 1986-08-19 Diesel Kiki Co., Ltd. Compressor control unit for automobile air conditioner
US4610146A (en) * 1983-12-15 1986-09-09 Nissan Motor Co., Ltd. Operating control device for air conditioner for use in vehicle
US4615180A (en) * 1985-07-12 1986-10-07 Louis Rudman Apparatus for control of a vehicle air conditioner
US4658943A (en) * 1984-11-28 1987-04-21 Honda Giken Kogyo Kabushiki Kaisha Control system for engine-driven auxiliary equipment for vehicles
US4730520A (en) * 1984-11-28 1988-03-15 Honda Giken Kogyo Kabushiki Kaisha Control system for engine-driven auxillary equipment for vehicles
EP0266208A2 (fr) * 1986-10-29 1988-05-04 Sanden Corporation Système de conditionnement d'air pour véhicule

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3459006A (en) * 1966-10-10 1969-08-05 Bosch Gmbh Robert Cooling apparatus for automotive vehicles
US4510764A (en) * 1982-12-03 1985-04-16 Diesel Kiki Co., Ltd. Control method for air conditioning systems for vehicles
US4610146A (en) * 1983-12-15 1986-09-09 Nissan Motor Co., Ltd. Operating control device for air conditioner for use in vehicle
US4606197A (en) * 1984-03-22 1986-08-19 Diesel Kiki Co., Ltd. Compressor control unit for automobile air conditioner
US4658943A (en) * 1984-11-28 1987-04-21 Honda Giken Kogyo Kabushiki Kaisha Control system for engine-driven auxiliary equipment for vehicles
US4730520A (en) * 1984-11-28 1988-03-15 Honda Giken Kogyo Kabushiki Kaisha Control system for engine-driven auxillary equipment for vehicles
US4615180A (en) * 1985-07-12 1986-10-07 Louis Rudman Apparatus for control of a vehicle air conditioner
EP0266208A2 (fr) * 1986-10-29 1988-05-04 Sanden Corporation Système de conditionnement d'air pour véhicule

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4214701A1 (de) * 1992-05-02 1993-11-04 Hella Kg Hueck & Co Verfahren und vorrichtung zum steuern des kompressors einer klimaanlage in einem kraftfahrzeug
DE4336937A1 (de) * 1992-05-02 1995-05-04 Hella Kg Hueck & Co Verfahren und Vorrichtung zum Steuern des Kompressors einer Klimaanlage in einem Kraftfahrzeug
FR2743761A1 (fr) * 1996-01-19 1997-07-25 Poix Guy De Dispositif de commande de climatiseur de vehicules automobiles
WO1998007588A1 (fr) * 1996-08-22 1998-02-26 Volvo Lastvagnar Ab Dispositif et procede de regulation d'un compresseur d'air
FR2908938A1 (fr) * 2006-11-22 2008-05-23 Peugeot Citroen Automobiles Sa Systeme d'alimentation depuis un vehicule automobile d'un appareil electrique de type nomade
CN102466300A (zh) * 2010-11-18 2012-05-23 上海汽车集团股份有限公司 车辆空调的控制方法
CN102466300B (zh) * 2010-11-18 2014-06-25 上海汽车集团股份有限公司 车辆空调的控制方法
US10625568B2 (en) 2015-10-09 2020-04-21 Volvo Truck Corporation Energy consumption of a multiple zone heating, ventilating and air conditioning system for a vehicle and method

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