Source: http://www.google.com/patents/US5954120?dq=6,606,102
Timestamp: 2014-03-10 10:22:02
Document Index: 651575261

Matched Legal Cases: ['application No. 08', 'application No. 08', 'application No. 08', 'application No. 08', 'application No. 08', 'application No. 08', 'application No. 08', 'application No. 08', 'application No. 08']

Patent US5954120 - Heating apparatus for vehicle, having heat generating unit - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsAccording to the present invention, when an air-conditioning clutch of a compressor is set on, even if an improvement of a heating capacity by a viscous heater is required, a viscous clutch is turned off not to transmit a rotational driving force of an engine to a rotor of the viscous heater, and further...http://www.google.com/patents/US5954120?utm_source=gb-gplus-sharePatent US5954120 - Heating apparatus for vehicle, having heat generating unitAdvanced Patent SearchPublication numberUS5954120 APublication typeGrantApplication numberUS 08/935,179Publication dateSep 21, 1999Filing dateSep 22, 1997Priority dateSep 30, 1996Fee statusLapsedAlso published asCA2215218A1, CA2215218C, CN1103701C, CN1188052A, DE69726085D1, EP0832771A2, EP0832771A3, EP0832771B1Publication number08935179, 935179, US 5954120 A, US 5954120A, US-A-5954120, US5954120 A, US5954120AInventorsShinji Aoki, Hajime Ito, Yasushi Kato, Toshio Morikawa, Goro UchidaOriginal AssigneeDenso Corporation, Toyota Jidosha Kabushiki KaishaExport CitationBiBTeX, EndNote, RefManPatent Citations (9), Non-Patent Citations (10), Referenced by (6), Classifications (13), Legal Events (6) External Links: USPTO, USPTO Assignment, EspacenetHeating apparatus for vehicle, having heat generating unitUS 5954120 AAbstract According to the present invention, when an air-conditioning clutch of a compressor is set on, even if an improvement of a heating capacity by a viscous heater is required, a viscous clutch is turned off not to transmit a rotational driving force of an engine to a rotor of the viscous heater, and further the rotational driving force of the engine is transmitted to the compressor. In this way, a torque applied to the engine E and the V-belt can be reduced, so that a fuel consumption ratio of the engine lowers and a fuel economical performance improves. Further, because an operation of the compressor is intermitted, it is possible to remove a fog of a front windshield, so that a safety of the vehicle travelling can be prevented from being deteriorated.
What is claimed is: 1. A heating apparatus for a vehicle having a driving source and a passenger compartment, comprising:a duct having an air outlet for blowing air toward said passenger compartment; a refrigerant evaporator for cooling air flowing in said duct by heat-exchanging between the air and a refrigerant; a refrigerant compressor having a rotating body which rotates when a rotational driving force of said driving source is applied thereto, said refrigerant compressor compressing the refrigerant sucked from said refrigerant evaporator when a rotational driving force is applied thereto; a heating heat exchanger for heating air flowing in said duct by heat-exchanging between a thermal medium having been heated and the air; a heat-generating unit using a shearing force, said heat-generating unit having a rotor which rotates when a rotational driving force of said driving source is applied thereto, a heat-generating chamber for sealing therein viscous fluid which generates heat when a shearing force generated by a rotational driving force of said rotor is applied thereto, said heat-generating unit heating the thermal medium to be supplied to said heating heat exchanger by said generated heat of the viscous fluid in said heat-generating chamber; a driving force transmitting unit for transmitting a rotational driving force of said driving source to said rotor of said heat-generating unit and said rotating body of said compressor; and heating control means for controlling said driving force transmitting unit to stop said rotor of said heat-generating unit when said driving force transmitting unit is controlled to rotate said rotating body of said refrigerant compressor by said driving source. 2. A heating apparatus according to claim 1, wherein,said heating control means includes rotation determining means for determining whether or not said rotating body of said refrigerant compressor is rotating, and when said rotation determining means determines that said rotating body of said refrigerant compressor is rotating, said heating control means controls said driving force transmitting unit to stop said rotor of said heat-generating unit. 3. A heating apparatus according to claim 1, wherein said driving source is an internal combustion engine mounted on said vehicle.
CROSS REFERENCE TO THE RELATED APPLICATION This application is based on and claims priority of Japanese Patent Application of No. Hei. 8-258421 filed on Sep. 30, 1996, the content of which is incorporated herein by reference.
Recently, an improvement of an engine efficiency is highly demanded for an engine mounted on a vehicle; however, when the engine efficiency improves, heat loss decreases; and therefore, the cooling water for cooling the engine cannot be heated sufficiently. Further, in a case of a vehicle having a diesel engine or a lean burn engine, the heat amount generated by the engine is too small to heat the cooling water sufficiently. In the vehicle where the heat amount generated by the engine is small, a temperature of the cooling water in the cooling water circuit cannot be maintained at a predetermined temperature (e.g., 80 occurs a problem in that a heating capacity for the passenger compartment is insufficient.
SUMMARY OF THE INVENTION It is an object of the present invention to provide a heating apparatus for a vehicle, capable of suppressing the noise from being generated due to a slip of a driving force transmitting means and for suppressing a durability of each portion of the heat-generating portion from being deteriorated, by reducing a stress applied to a driving source and the driving force transmitting means.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS Additional objects and advantages of the present invention will be more readily apparent from the following detailed description of preferred embodiments thereof when taken together with the accompanying drawings in which:
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 to 9 show a first embodiment of the present invention. FIG. 1 shows an entire structure of an air conditioning apparatus for a vehicle, FIG. 2 shows a refrigeration cycle, and FIG. 3 shows an engine and a belt transmitting mechanism.
More specifically, as shown in the characteristics graph of FIG. 9, a hysteresis is given between a set cooling water temperature (A: 80 C., for example) and another set cooling water temperature (B: 70 C., for example). When the temperature of the cooling water is equal to or higher than the set cooling water temperature, i.e., the temperature of the cooling water is high, the electromagnetic coil 41 is turned off, whereas when the temperature of the cooling water is equal to or lower than the set cooling water, i.e., the temperature of the cooling water is low, the electromagnetic coil 41 is turned on. The hysteresis is given to the characteristics graph of FIG. 9; however, the hysteresis may not be given.
Accordingly, the temperature of the cooling water flowing into the heater core 15 increases so that the temperature of the cooling water in the cooling water circuit 5 can be maintained approximately at a predetermined cooling water temperature (e.g., 80 amount of heat of the front heater core 15 increases, and heated sufficiently while passing through the heater core 15 can be blown into the passenger compartment, so that the heating capacity for the passenger compartment can be prevented from being deteriorated.
The cooling water temperature switch 74 is opened when the temperature of the cooling water circulating in the cooling water circuit 5 (in this embodiment, the temperature of the cooling water at the outlet-side cooling water pipe 57b of the cooling water passage 51 of the viscous heater 4) is higher than a predetermined temperature A (e.g., 80 C.) and is closed when the temperature of the cooling water is lower than the predetermined temperature A or another predetermined temperature B (e.g., 70-75
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS4561260 *Aug 6, 1984Dec 31, 1985Nippondenso Co., Ltd.Method of controlling refrigeration system for automotive air conditionerUS4733635 *Jul 30, 1986Mar 29, 1988501 ValeoHeat generator for automobile vehiclesUS4898005 *May 24, 1989Feb 6, 1990Diesel Kiki Co., Ltd.Method of controlling idling rotational speed of internal combustion engine for vehicles equipped with air conditioning systemsUS4993377 *Mar 5, 1990Feb 19, 1991Aisin Seiki Kabushiki KaishaAutomobile heating apparatus and heat generator for the sameUS5009074 *Aug 2, 1990Apr 23, 1991General Motors CorporationLow refrigerant charge protection method for a variable displacement compressorUS5197298 *Nov 12, 1991Mar 30, 1993Japan Electronic Control Systems Company, Ltd.Sensor and control system for an automotive air conditioning systemUS5501267 *Dec 28, 1992Mar 26, 1996Nippondenso Co., Ltd.Air conditioning apparatus for an electric vehicle using least power consumption between compressor and electric heaterJPH0357877A * Title not availableJPH0692134A * Title not available* Cited by examinerNon-Patent CitationsReference1 *U.S. application 08/933,295, Inoue et al., filed Sep. 18, 1997.2 *U.S. application No. 08/862,866, Aoki et al., filed May 23, 1997.3 *U.S. application No. 08/886,667, Aoki et al., filed Jul. 1, 1997.4 *U.S. application No. 08/892,411, Ito et al., filed Jul. 14, 1997.5 *U.S. application No. 08/898,536, Aoki et al., filed Jul. 22, 1996.6 *U.S. application No. 08/901,370, Ito, filed Jul. 28, 1997.7 *U.S. application No. 08/915,155, Aoki et al., filed Aug. 20, 1997.8 *U.S. application No. 08/936,257, Aoki et al., filed Sep. 24, 1997.9 *U.S. application No. 08/937,049, Aoki et al., filed Sep. 24, 1997.10 *U.S. application No. 08/937,050, Aoki et al., filed Sep. 24, 1997.* Cited by examinerReferenced byCiting PatentFiling datePublication dateApplicantTitleUS6072153 *Dec 18, 1998Jun 6, 2000Denso CorporationAir conditioning apparatus having electric heating member integrated with heat exchangerUS6138920 *Oct 4, 1999Oct 31, 2000Kabushiki Kaisha Toyoda Jidoshokki SeisakushoVehicle heating system and a method of controlling the same systemUS6812582 *Jan 15, 2002Nov 2, 2004Gino W. KennedyIntegrated semi-truck air conditioning system with auxiliary power sourceUS7686146Sep 27, 2006Mar 30, 2010Denso International America, Inc.Combination viscous fan drive and viscous heat deviceUS8561915 *Dec 21, 2005Oct 22, 2013Toyota Jidosha Kabushiki KaishaVehicle and method for controlling sameUS20080006711 *Dec 21, 2005Jan 10, 2008Toyota Jidosha Kabushiki KaishaVehicle and Method for Controlling Same* Cited by examinerClassifications U.S. Classification165/43, 126/247, 237/12.30B, 165/202, 237/2.00A, 62/115International ClassificationF24J3/00, B60H1/08, B60H1/03Cooperative ClassificationB60H1/038, F24J3/003European ClassificationF24J3/00B, B60H1/03GLegal EventsDateCodeEventDescriptionNov 8, 2011FPExpired due to failure to pay maintenance feeEffective date: 20110921Sep 21, 2011LAPSLapse for failure to pay maintenance feesApr 25, 2011REMIMaintenance fee reminder mailedFeb 26, 2007FPAYFee paymentYear of fee payment: 8Dec 25, 2002FPAYFee paymentYear of fee payment: 4Sep 22, 1997ASAssignmentOwner name: DENSO CORPORATION, JAPANFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:AOKI, SHINJI;MORIKAWA, TOSHIO;ITO, HAJIME;AND OTHERS;REEL/FRAME:008813/0586;SIGNING DATES FROM 19970819 TO 19970829Owner name: TOYOTA JIDOSHA KABUSHIKI KAISHA, JAPANRotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services©2012 Google