Temperature controller power unit of a vehicle
The invention relates to the field of automatic system of temperature regulation in cooling systems of power plants vehicles. Temperature controller power unit of a vehicle includes a power source AC, the governing body, induction motor and cooling fan. The regulator has applied the same two asynchronous motor with slip-ring rotor, the stator windings are connected to a power source, the rotor windings are connected in series with resistors and a shaft connected with the shaft of the cooling fan. The stator of one of the asynchronous motors are pivoted and connected to the rotation mechanism connected to the control authority. The invention provides improved efficiency and reliability regulator. 4 Il.
The temperature controller relates to the transport industry, in particular to the field of automatic system of temperature regulation (vysokonogoye parts, oil water, charge air, and other heat engines, the windings of electrical machines, transformers, bound vehicles (locomotives, cars, tractors and other).
Any automatic system contains two functional parts: the object of regulation and automatic control . Any automatic regulator has two main series-connected functional parts: the governing body and Executive-regulating device. In turn, a regulating device contains two functional parts: the actuator and the regulatory body [2, 3]. Automatic temperature controls, containing as the governing body of the cooling fan, the function of the actuator performs the fan drive [2, 3]. Known automatic temperature controls electric fan AC contain a power source (usually a traction generator or auxiliary generator). Known automatic temperature controls energy installations vehicles with electric fan motor AC three species. Automatic temperature controls of the first type contain a power source that is connected to the frequency Converter (usually containing a DC link rectifier), with whom entilator. The temperature Converter connected to the governing body that manages them according to the temperature of the coolant in the cooling system of power plant of the vehicle [1, 3, 4]. In electric fan drive such an automatic temperature controller implements the principle of frequency control of an induction motor [6, 8]. Automatic temperature controls of the second type contain a power source that is connected to the Converter phase voltage connected to the stator windings of a special asynchronous motor with two-layer (or dwuhvalentnam) a rotor connected to the shaft of the fan. To the inverter phase voltage connected to the governing body, the governing them on the temperature of the power plant of the vehicle. In electric drive cooling fan of such automatic temperature controller to implement the principle of phase control of an induction motor with two-layer (or dwuhvalentnam) rotor [5, 7]. Automatic temperature controllers of the third kind contain a power source that is connected to the stator winding of an induction motor with squirrel-cage rotor connected to the shaft ventilate the Mering body, managing them according to the temperature of the power plant of the vehicle [3, 8, 9]. Known automatic temperature controllers power plant of the vehicle have significant shortcomings. In automatic temperature controllers with frequency-controlled asynchronous motor cooling fan must be applied to the frequency converters certain dimensions, mass and cost at full capacity induction motor. It also reduces the reliability of the automatic temperature controller. When the frequency control of induction motor with fan load, its efficiency is reduced due to nonsinusoidal supply voltage, especially at partial loads. In automatic temperature controllers with phase control asynchronous motor with two-layer (or dwuhvalentnam) rotor requires the use of the Converter phase voltage of certain dimensions, mass and cost. It also reduces the reliability of the automatic temperature controller. When the phase control of an induction motor with fan load efficiency of an electric drive is significantly reduced when the rotation speed decreases Venta 30-40% less than the nominal capacity of such asynchronous motor with squirrel-cage rotor. In automatic temperature controllers with electric fan variable supply requires the use of the mechanism of rotation of the blades, which complicates the controller design. The mechanism of rotation of the blades increases the size and weight of the cooling fan, as well as the cost of the fan and controller. In addition, with this method changes the supply fan induction motor has a rotational speed proportional to the rotation frequency of the supply voltage, which may be constant or may vary in a small range, which leads to the small thermal load of the cooling system of the power plant operation of the cooling fan with small angles of rotation of the blades and the low efficiency of the fan and electric drive. Offer automatic temperature controller with electric fan AC does not have the disadvantages of the known automatic regulators: it is not applied to a frequency Converter or inverter phase voltage, as well as the mechanism of rotation of the blades of the cooling fan. It utilizes two identical asynchronous motor with slip-ring rotors, each with a capacity equal to half the power of the fan. The stator odnom the mechanism of rotation of the blades of the cooling fan. Offer automatic temperature controller with smoothly controlled electric cooling fan AC contains the following main elements (Fig.1. The principal block diagram of an automatic temperature controller power unit of the vehicle with continuously controlled electric cooling fan AC): the governing body 1, is connected to the rotation mechanism of the stator 2 asynchronous motor 3, which shaft is connected with the shaft of the second induction motor 4 and the shaft of the cooling fan 5, the stator windings of induction motors connected to the power source 6 and the rotor winding are connected in series through resistors 7. Automatic temperature controller operates as follows. When the value of the variable temperature tpless than the minimum value of tpminthe output signal of the governing body 1 Iyhas a minimum value of Iyminwhen the output signal of the rotation mechanism of the stator 2withhas a minimum value ofminand the stator of the asynchronous motor 3 is in a position (i.e., has an angle turning parts, all specifications cooling 5 equal to zero. This is because when acquiescent position of the stator of induction motors 3 and 4, whenwith=0 electrical degrees, EMF (E) in the rotor windings are directed oppositely and E'p=E'2+E''2=0. Thus the current in the rotor circuit is zero and the electric cooling fan torque (M) is equal to zero andw=0. With increasing tpand further implementation of tp>tpminincreases the output signal of the governing body 1 Iyincreasewithand. While E'p>0; in the windings of the rotors will be the current I2>0, the electric fan M>0,W>0, the increased flow of cooling fan GW. The process of increasing signals tp, Iy,c,E'p, I2andWwill continue until, until equilibrium thermal conditions in the cooling system of power plants. With increasing<180° e. both active components I2>0, i.e., both asynchronous motor operate in motor mode, developing different moments. In the limiting case, when=180° e. (this corresponds to ±180°/p geometric, p - number of pole pairs) vectors EMF winding rotors are the same and E'p=E'2+E''2; engine developing the same moments as the two normal engine. At tp=tpmaxthe signals Iy,with,andWmaximum. When R reaches 180°, i.e., the stator of the asynchronous motor 3 will occupy a position in whichwmaxspeedWbecause of the resistor 7 will be less synchronous 6-10%. Electric cooling fan offer automatic temperature controller has mechanical characteristics shown in Fig. 2. According to the torque of the actuator fromWPris characteristic cooling fan (line 1) reflect the steady-state modes of operation of the electric cooling fan. In Fig.3 given the static characteristic of the electric cooling fan - dependenceW(line 1) and the dependence of efficiencydinduction motors 3 and 4 from(line 2). Dependenced(W) the same as the hydrostatic drive and electric drive cooling fan with phase control of an induction motor. If the static characteristics of the governing body 1 and the mechanism of rotation of the stator 2 linear static characteristic of the automatic temperature controller will have the form shown in Fig.4. Thus, the proposed automatic temperature controller automatically changesW(and supply cooling fan) depending on tpwhen you change it within regulation without the use of frequency Converter and the inverter phase voltage, special asynchronous motor or mechanism of rotation of the blades.
Sources of information
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Temperature controller power unit of the vehicle that contains the power source AC, the governing body, induction motor and cooling fan, characterized in that it utilizes two identical asynchronous motor with slip-ring rotor, the stator windings are connected to a power source, the rotor windings are connected in series with resistors and a shaft connected with the shaft of weborama, connected to the control authority.
FIELD: transport engineering; automobile engine cooling systems.
SUBSTANCE: invention relates to devices for control and regulation of temperature of medium circulating in cooling systems of internal combustion engines. Proposed thermostat connected with control unit has housing with branch pipes to let in and out of cooling liquid, cover with branch pipe to supply cooling liquid to radiator rigidly secured on housing. Housing accommodates rotary electromagnet with flat main and auxiliary valves installed on rotor. Main rotary valve consists of movable and fixed diaphragms. Auxiliary rotary valve is formed by outlet hole of housing outlet branch pipe and second movable diaphragm.
EFFECT: simplified control of engine cooling, improved reliability of cooling system.
FIELD: transport engineering.
SUBSTANCE: invention relates to combination cooling systems of vehicles powered by internal combustion engines. Proposed engine cooling system, including two ejectors and two centrifugal fans operating in parallel with ejectors, fan fluid coupling supply main line filled with oil from transmission and steering mechanism, is furnished with two-position fan on-off valve operating from oil pressure in engine lubricating system oil outlet line. If pressure in engine lubricating system exceeds 0.32 MPa, spring-loaded spool of valve cuts off delivery of oil into hydraulic fluid coupling and switches off fan. Invention provides automatic switching on/off of fan which improves reliability of system in winter providing heating of system after starting of engine and further operation under recommended temperature conditions.
EFFECT: improved operation of engine.
2 cl, 2 dwg
FIELD: mechanical engineering; transport engineering.
SUBSTANCE: invention relates to automatic control of liquid temperature in engine cooling system. According to proposed invention, device contains three-way control member with branch pipes to deliver cooling liquid from engine, directing liquid to bypassing and to radiator, temperature transmitter, electric actuator, control unit. Control member has cooling liquid distributing reservoir with rotary valve connected with electric actuator and through holes, with branch pipes to direct cooling liquid to bypassing, radiator and additional branch pipe whose output is connected to heater. Device is furnished also with load transmitter installed on engine and connected with programmable control unit containing setter and comparator whose input is connected to temperature and load transmitters, and output, to electric actuator of control member.
EFFECT: simplified design of control members, reduced time taken for warming up to engine working temperature, possibility of selection of cooling system working temperature and maintaining preset temperature conditions at variable loads of engine.
2 cl, 3 dwg
FIELD: mechanical engineering; internal combustion engines.
SUBSTANCE: invention can be used in vehicle internal combustion engines. Proposed temperature controller containing housing with branch pipes to supply cooling liquid from engine, and direct cooling liquid for bypassing and to radiator, temperature transmitter, sealing element, two valves installed inside housing on rod, temperature transmitter, control unit, reciprocating actuating mechanism, and spring is furnished additionally with load sensor, setter and comparator whose input is connected to temperature transmitter and load sensor, and output is connected to control unit made programmable for changing temperature at variable loads. Moreover, temperature controller contains ultrasonic device whose input is connected with control unit and output, through transmitters and receivers installed on branch pipes directing liquid for bypassing and to radiator, as well as amplifier, are connected to phase-meter. Invention makes it possible to maintain higher temperature of cooling liquid at partial loads, warming up, especially at low ambient temperatures, and purposeful maintenance of low temperature at rated loads of engine and timely elimination of faults in valve system.
EFFECT: enhanced operation.
2 cl, 1 dwg
FIELD: mechanical engineering.
SUBSTANCE: proposed temperature control system contains cooling system with air-liquid radiator and pump connected by pipelines with fitted-in temperature transmitter; fan; induction motors whose stator windings are connected to ac generator driven by heat machine. Shaft of fan is connected with shafts of two similar induction motors with phase-wound rotors whose series-connected rotor windings are connected to rectifier. Stator of one of induction motors is made turnable, being connected with temperature transmitter by means of first control unit and microprocessor controller to which second control unit of heat machine is connected. Semiconductor thermoelectric cooler is connected to cooling system pipeline at outlet from heat machine, cooler being connected with output of rectifier. System is furnished with device for closing rotor windings of induction motors connected to microprocessor controller.
EFFECT: improved stability of control, reduced energy consumption for cooling of heat machine.
FIELD: automotive industry; vehicle internal combustion engines.
SUBSTANCE: proposed thermostat contains solid filler, electric heater, housing with branch pipes to supply cooling liquid from engine and let it out to bypass into engine and radiator, two valves installed inside housing of rod, temperature and load sensors, comparator, control unit. Thermostat is installed in housing with possibility of heat exchange between solid filler and cooling liquid of cooling system and electric heater installed out of the cooling liquid whose input is connected to control unit, and output is connected with valves through filler, elongated rod and guide bushing. Thermostat can contain also built-in thermoelectric element installed out of cooling liquid whose input is connected to control unit, output is coupled with valves through filler, elongated rod and guide bushing, and junctions of thermoelectric element are connected through heat exchanger to cooling liquid end of cooling system. Moreover, electric thermostat inside housing can contain mechanical thermostat coupled with electric thermostat for parallel operation and switching off of electric thermostat at nominal loads.
EFFECT: possibility of maintaining optimum temperature conditions at partial loads within nonuniformity zone.
3 cl, 3 dwg
FIELD: transport engineering; crawler and wheeled vehicles.
SUBSTANCE: invention relates to vehicles with combined automatic control system of engine and transmission. Proposed system contains internal combustion engine, transmission shifted-in pickup, vehicle speed sensor, ambient air temperature sensor, engine lubrication system oil temperature sensor, cooling liquid temperature sensor, engine crankshaft speed sensor, microprocessor control unit, switching unit, radiator louvers electric drive, fan fluid coupling, radiator louvers, fan, friction clutch lock engagement sensor providing control of temperature conditions of engine and transmission. Introduced additionally are: microprocessor control unit. Switching unit, radiator louvers electric drive, fan fluid coupling, fan, radiator louvers, shifted-in gear pickups, vehicle speed sensor, ambient air temperature sensor, engine lubrication system oil temperature sensor, cooling liquid temperature sensor, engine crankshaft speed sensor and friction clutch lock engagement sensor.
EFFECT: invention provides automation of engine and transmission temperature control process.
2 cl, 4 dwg
FIELD: transport engineering.
SUBSTANCE: invention relates to car air intakes of variable geometry designed for cooling engines of sports cars. Proposed car contains at least one air intake with at least one deflector with one or ore walls to deliver air through hole made in car body. Deflector is hinge-connected with at least one of car parts to provide its turning by means of one motor around axle to change size of hole. Angle between axis of rotation of deflector and vertical symmetry plane of car does not exceed 45°.
EFFECT: improved aerodynamic characteristics of car.
19 cl, 11 dwg
FIELD: transport engineering.
SUBSTANCE: invention relates to design of cooling systems of transmission and suspension of vehicles. Proposed cooling system contains self-contained cooling circuit of hydrodynamic torque converter and planetary gearbox including first radiator, third section of head exchanger and first pump, self-contained cooling circuit of hydrostatic steering mechanism including second radiator, second section of heat exchanger and second pump, self-contained cooling circuit of hydraulic shock absorber unit including third radiator, heat exchanger and third pump, and self-contained cooling circuit of standby generator drive reduction gear including fourth pump and first section of heat exchanger. System is furnished with first, second, third and fourth electromagnetic clutches and electromagnetic clutch engagement control unit, and first, second, third and fourth liquid heating temperature sensors, arranged, respectively, in cooling circuits of hydrodynamic torque converter and planetary gearbox, hydrostatic steering mechanism, hydraulic shock absorber unit and standby generator drive reduction gear.
EFFECT: reduced power consumption for driving of pumps of cooling circuits of hydromechanical transmission and suspension.