Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16H—GEARING
  • F16H57/00—General details of gearing
  • F16H57/04—Features relating to lubrication or cooling or heating
  • F16H57/0412—Cooling or heating; Control of temperature
  • F16H57/0413—Controlled cooling or heating of lubricant; Temperature control therefor
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
  • F01P3/00—Liquid cooling
  • F01P3/20—Cooling circuits not specific to a single part of engine or machine
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
  • F01P7/00—Controlling of coolant flow
  • F01P7/14—Controlling of coolant flow the coolant being liquid
  • F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
  • F01P7/165—Controlling of coolant flow the coolant being liquid by thermostatic control characterised by systems with two or more loops
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
  • F01P5/00—Pumping cooling-air or liquid coolants
  • F01P5/10—Pumping liquid coolant; Arrangements of coolant pumps
  • F01P2005/105—Using two or more pumps
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
  • F01P2060/00—Cooling circuits using auxiliaries
  • F01P2060/04—Lubricant cooler
  • F01P2060/045—Lubricant cooler for transmissions
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
  • F01P2060/00—Cooling circuits using auxiliaries
  • F01P2060/06—Retarder
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
  • F01P2060/00—Cooling circuits using auxiliaries
  • F01P2060/08—Cabin heater

Definitions

• the present invention relates to a cooling circuit for driving motor vehicles with a discharge line that connects the drive motor to at least one radiator, with a supply line that connects the radiator with the drive motor, with a thermostat inserted into the discharge line, and with one inserted into the supply line Circulation pump.
• Coolant usually water
• the coolant flows through the engine under the influence of a circulation pump and then passes through the thermostat, which supplies the coolant at a correspondingly high temperature to a radiator, in which the coolant is cooled by the air entering during the journey or supplied by a fan, after which it is assisted a circulation pump is returned to the engine.
• the thermostat ensures that the coolant is fed back to the engine without flowing through the radiator.
• a second radiator can be provided, the fan wheel of which is insufficiently cooled by the first radiator via a thermal Statschalter is switched on, so as to increase the cooling of the coolant.
• the cooled water flowing through the two radiators is in turn fed to the drive motor to be cooled via the circulation pump.
• a heat exchanger is often inserted into the cooling circuit before or after the motor. The temperature of the coolant
• thermostat which regulates the coolant flow to the radiator and a bypass. With this regulation, the excess power loss is fed to the radiator.
• the thermostat is often only partially open, which reduces the effect of the radiator.
• the known type of installation of the heat exchanger takes the needs of the engine into account very well, but cannot be designed for the needs of a transmission and / or a retarder.
• the transmission oil temperatures are permanently stable in transmissions with retarders only above certain temperatures.
• the object of the present invention is to propose a cooling circuit in which the concerns of the transmission and / or retarder are taken into account in an optimal manner.
• the proposal according to the invention to install the heat exchanger on the radiator side together with an associated circulating pump allows the coolant flow through the heat exchanger to be increased independently of the engine coolant flow and thus to be adapted to the gearbox requirements.
• the transmission oil sump temperature can be set largely independently of the engine coolant temperature; this leads to a
• the transmission loss power (i.e. the radiator power loss), which occurs cyclically or acyclically to the engine speed, can also be dissipated at engine idling speeds;
• the circulation pump for the engine coolant can be designed for the needs of the engine cooling circuit, which enables a reduction in pump performance and a reduction in consumption;
• the heat exchanger can be in one favorable operating point can be operated and thereby be designed smaller;
• the heat exchanger can be integrated into the transmission housing, which saves further costs;
• the coolant pump of the heat exchanger can act as an additional coolant pump when the thermostat is closed;
• FIG. 1 shows an inventive cooling circuit of the series design
• FIG. 2 shows a cooling circuit according to the invention of the design in parallel
• Figure 3 shows an inventive cooling circuit of the series version.
• FIG. 4 shows a cooling circuit according to the invention of an embodiment with a bypass.
• 1 denotes the drive motor of a motor vehicle to be cooled, the power loss of which is designated Pvmot.
• the discharge line of the motor is designated 3 and the usual thermostat 4, which supplies the coolant, generally water, heated to a corresponding temperature to a first cooler 6, from which it is supplied to the motor via the supply line 8 with the aid of a circulation pump 2 1 is fed back in a closed circuit.
• the coolant generally water
• the gear assigned to the motor is also designated 14, the power loss of which is designated P vge t, the converter, not shown, often assigned to the gear having a power loss of P VW and; 15 denotes the retarder assigned to the transmission, the power loss of which is designated P V retar is.
• Transmission 14 and retarder 15 are also cooled by a coolant, the heated coolant, preferably oil, being fed in line 16 to a heat exchanger 10, which is used on the radiator side in the cooling circuit for the drive motor and which is used on the one hand by the Feed line 8 for the engine is penetrated and on the other hand by the discharge line 16 for gearbox and retarder.
• the coolant for the gearbox and retarder emerging from the heat exchanger 10 flows through a line 12 and is returned to the gearbox 14 and the retarder 15 with the aid of a circulation pump 13.
• a circulation pump 11 is provided behind the heat exchanger 10, viewed in the direction of flow, which flows into a connecting line
• the heat exchanger is therefore arranged in front of the engine and on the one hand is penetrated by the supply line 8 for the engine, in which the coolant cooled by the radiator 6, possibly with the radiator 7 connected, flows in the direction of the engine 1.
• the heat exchanger 10 is penetrated by the line 16, in which the coolant heated by the transmission and retarder flows.
• the heat exchanger 10 is in turn penetrated on the one hand by the line 16 in which the coolant heated by the transmission 14 and by the retarder 15 flows; here, however, the heat exchanger 10 is used together with the circulation pump 11 in the connecting line 8 'between the feed line 8 to the drive motor and its discharge line 3.
• the heat exchanger is also inserted in the cooling circuit before the drive motor.
• the circulation pump 11 is here between the radiator 6 and the circulation pump 2 for the motor 1, i. H. used in the flow direction upstream of the heat exchanger in the supply line 8.
• the heat exchanger 10 is penetrated by the transmission line 16 or retarder 15 through the discharge line 16.
• the circulation pump 11 is omitted compared to FIG. 3.
• the thermostat 4 can be bypassed with a bypass 20.
• the coolant flow through the heat exchanger can be increased independently of the engine coolant flow; this type of cooling circuit is particularly suitable for commercial vehicles such as buses.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=7888985

Family Applications (1)

Country Status (4)

Families Citing this family (10)

Family Cites Families (12)

• 1998
  • 1998-11-25 DE DE19854389A patent/DE19854389A1/de not_active Withdrawn
• 1999
  • 1999-11-19 EP EP99956017A patent/EP1133623A1/de not_active Withdrawn
  • 1999-11-19 HU HU0104063A patent/HUP0104063A3/hu unknown
  • 1999-11-19 WO PCT/EP1999/008881 patent/WO2000031387A1/de not_active Application Discontinuation

Non-Patent Citations (1)

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