CN104500159B - Engine power utilization system and controlling method - Google Patents
Engine power utilization system and controlling method Download PDFInfo
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- CN104500159B CN104500159B CN201410743096.0A CN201410743096A CN104500159B CN 104500159 B CN104500159 B CN 104500159B CN 201410743096 A CN201410743096 A CN 201410743096A CN 104500159 B CN104500159 B CN 104500159B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
Engine power utilization system and controlling method, utilize organic working medium cooled engine, organic working medium obtains preheating in engine body, utilize vaporizer that engine exhaust energy is passed to the organic working medium after preheating, organic working medium is made to become high temperature and high pressure gas, decompressor is utilized to make high temperature and high pressure gas expansion work, utilize dynamic coupling device decompressor to be exported shaft work to be coupled with engine output shaft merit, realize the common vehicle that drives to travel, engine crankshaft is utilized to drive working medium pump that low-pressure liquid organic working medium is pressurised into high-pressure liquid organic working medium, with engine cooling water jacket outlet port organic working medium temperature for feedback signal controls condenser fan, by the flow direction of electromagnetic cross valve control organic working medium, with engine speed, decompressor fiducial axis merit is the opening and closing that feedback signal controls dynamic coupling device.The present invention utilizes organic working medium to absorb engine body heat dissipating capacity and exhaust energy, and then is converted into Power output, realizes the efficiency utilization of motor fuel burning energy.
Description
Technical field
The invention belongs to total energy approach technical field, relate to engine power utilization system and controlling method.This system utilizes organic working medium (non-azeotropic mixed working medium) as the cooling medium of motor, and absorb the heat that engine body distributes, by vaporizer, engine exhaust energy is passed to organic working medium, organic work working medium is made to become high temperature and high pressure gas, be that shaft work exports by the Conversion of Energy of organic working medium by decompressor, decompressor output shaft is coupled with engine output shaft, realize the comprehensive utilization of energy, regulate the running state of engine power utilization system according to the running state of motor, vaporizer, organic working medium.
Background technique
After engine cylinder fuel combustion, most of energy is discharged in air by engine exhaust, cooling system, and only have fraction energy to be utilized output shaft work, this not only causes a large amount of energy wastes, also creates the increase of ambient temperature.If by the energy regenerating of engine exhaust and cooling system, and can fully utilize, will greatly improve the utilization ratio of fuel combustion energy, reduce motor energy consumption, the discharge of decreasing pollution thing and heat.
The main method of engine exhaust heat is utilized to comprise at present: waste heat heating, thermo-electric generation, utilizing waste heat for refrigeration, organic Rankine bottoming cycle heat recovery.Utilize waste heat heating technology can improve the utilization ratio of motor fuel burning energy, but be only applicable to winter, still can cause the waste of energy in other season.Thermoelectric generation is subject to the restriction of thermoelectric conversion material conversion efficiency, also cannot meet practical at present.Utilizing waste heat for refrigeration unit is bulky, efficiency is lower, is not also suitable for engine power comprehensive utilization.Utilizing organic rankine cycle system to reclaim engine exhaust heat can be mode ideal at present, but is still in conceptual phase, and there is complex structure, the problem such as how working medium pump wasted work, transfer power utilize.
Summary of the invention
The object of this invention is to provide a set of engine power utilization system and controlling method.Engine body radiated energy, engine exhaust energy, motor are exported total energy approach, improves the utilization ratio of motor fuel, reduce energy ezpenditure.
The present invention adopts technological scheme as follows:
Adopt organic working medium (non-azeotropic mixed working medium) as the cooling medium of engine body, the heat dissipating capacity of engine body is passed to organic working medium, preheating organic working medium, utilize vaporizer that engine exhaust energy is passed to the organic working medium after preheating, organic working medium is evaporated, utilize decompressor to be exported for shaft work by the Conversion of Energy of gaseous state organic working medium, utilize dynamic coupling device to be coupled with engine crankshaft shaft work by the shaft work of decompressor, realize the comprehensive utilization of engine power.
Engine power utilization system and controlling method, comprising: cooling circuit, heat to power output loop, control loop.
Described cooling circuit, comprises motor, three-way solenoid valve, expansion valve, condenser, working medium pump.The annexation of each parts of cooling circuit is: three-way solenoid valve exports with engine cooling water jacket and is connected, three-way solenoid valve, expansion valve, condenser, working medium pump join end to end successively, working medium pump is connected with engine cooling water jacket import, working medium pump is connected with engine crankshaft by coupling, drives working medium pump to rotate by engine crankshaft.
Described heat to power output loop, comprises motor, three-way solenoid valve, vaporizer, decompressor, one-way valve, condenser, working medium pump.The annexation of each parts in heat to power output loop is: three-way solenoid valve, vaporizer, normally open solenoid valve, decompressor, one-way valve, condenser, working medium pump joins end to end successively, engine exhaust pipe, normally open solenoid valve, vaporizer joins end to end successively, three-way solenoid valve exports with engine cooling water jacket and is connected, working medium pump is connected with engine cooling water jacket import, working medium pump is connected with engine crankshaft by coupling, working medium pump is driven to rotate by engine crankshaft, decompressor output shaft is connected with engine crankshaft by power coupler, realize the common output of decompressor shaft work and motor shaft work
Described control loop, comprise control module, engine exhaust temperature sensor, engine back pressure sensor, engine exhaust mass flow sensor, evaporator outlet exhaust gas temperature sensor, evaporator outlet organic working medium temperature transducer, evaporator outlet organic working medium pressure transducer, engine cooling water jacket outlet port organic working medium temperature transducer, organic working medium mass flow sensor, engine rotation speed sensor, engine torque sensor, normally closed solenoid valve, normally open solenoid valve, three-way solenoid valve, agitator motor, fan driving motor, power coupler.
The each parts of control loop connect and mounting point is: engine exhaust temperature sensor, engine back pressure sensor, engine exhaust mass flow sensor, evaporator outlet exhaust gas temperature sensor, evaporator outlet organic working medium temperature transducer, evaporator outlet organic working medium pressure transducer, engine cooling water jacket outlet port organic working medium temperature transducer, organic working medium mass flow sensor, engine rotation speed sensor, engine torque sensor, normally closed solenoid valve, normally open solenoid valve, three-way solenoid valve, agitator motor, fan driving motor, power coupler is connected with control module respectively by wire harness, engine exhaust temperature sensor, engine back pressure sensor, engine exhaust mass flow sensor is arranged on engine exhaust pipe respectively, and evaporator outlet exhaust gas temperature sensor is arranged on vaporizer hot fluid side outlet place, evaporator outlet organic working medium temperature transducer, evaporator outlet organic working medium pressure transducer is arranged on vaporizer cold fluid side outlet place respectively, engine cooling water jacket outlet port organic working medium temperature transducer, organic working medium mass flow sensor is arranged on engine cooling water jacket outlet port respectively, engine rotation speed sensor, engine torque sensor is arranged on engine flywheel dish, normally closed solenoid valve, normally open solenoid valve is installed in parallel after engine exhaust pipe, three-way solenoid valve is arranged between engine cooling water jacket and vaporizer, agitator motor is arranged on bottom condenser, fan driving motor is arranged on front side of condenser, and power coupler is arranged between decompressor output shaft and engine crankshaft.
Control module in described control loop, comprises power circuit, single-chip microcomputer, variable parameter input circlult, starting circuit, switch driving circuit, motor-drive circuit.The output terminal of starting circuit is connected with single-chip microcomputer digital input port, the output terminal of variable parameter input circlult is connected with single-chip microcomputer signal input port, the input end of switch driving circuit is connected with the output terminal of single-chip microcomputer, the input end of motor-drive circuit is connected with the output terminal of single-chip microcomputer, variable parameter input circlult receiving area haircut motivation exhaust gas temperature sensor, engine back pressure sensor, engine exhaust mass flow sensor, evaporator outlet exhaust gas temperature sensor, evaporator outlet organic working medium temperature transducer, evaporator outlet organic working medium pressure transducer, engine rotation speed sensor, engine torque sensor, engine cooling water jacket outlet port organic working medium temperature transducer, the signal that organic working medium mass flow sensor exports, starting circuit receives the signal that enable switch exports, the output terminal of switch driving circuit and normally closed solenoid valve, normally open solenoid valve, three-way solenoid valve, agitator motor, power coupler is connected, and the input end of motor-drive circuit is connected with the output terminal of single-chip microcomputer, and the output terminal of motor-drive circuit is connected with fan driving motor.
The controlling method of engine power utilization system, comprise: gather engine exhaust temperature sensor, engine exhaust mass flow sensor, evaporator outlet exhaust gas temperature sensor, evaporator outlet organic working medium temperature transducer, evaporator outlet organic working medium pressure transducer, engine cooling water jacket outlet port organic working medium temperature transducer, organic working medium mass flow sensor, the signal of engine rotation speed sensor, the size of decompressor output power is calculated by single-chip microcomputer, inquiry decompressor operating conditions MAP, determine the actual maximum (top) speed that can arrive of decompressor under this power, judge decompressor rotating speed whether > engine speed, if decompressor rotating speed > engine speed, connect power coupler, decompressor output power is coupled with engine output, if decompressor rotating speed < engine speed, disconnect power coupler, motor individual output power.
Control module gathers engine cooling water jacket outlet port organic working medium temperature transducer, judge organic working medium temperature whether >363K, if Temperature of Working >363K, fan driving motor rotating speed is increased by single-chip microcomputer, promote condenser intensity of cooling, if Temperature of Working <363K, keep fan driving motor rotating speed constant, maintain condenser intensity of cooling.
Control module gathers the signal of engine back pressure sensor, engine rotation speed sensor, engine torque sensor, judge engine back pressure whether >0.12MPa, if engine back pressure >0.12MPa, opened by Single-chip Controlling normally closed solenoid valve, make part engine exhaust directly enter air, reduce engine exhaust back pressure.
Control module gathers evaporator outlet organic working medium pressure sensor signal, judge organic working medium evaporating pressure whether >3.0MPa, if organic working medium evaporating pressure >3.0MPa, organic working medium is made directly to flow back to condenser by expansion valve by Single-chip Controlling three-way solenoid valve (25), disconnect power coupler, guarantee the safe operation of system.
When system is normally run, control module controls normally closed solenoid valve and closes, and normally open solenoid valve is opened, and three-way solenoid valve makes organic working medium flow to vaporizer direction, power coupler is connected.
The present invention compared with prior art, has the following advantages and beneficial effect
1. adopt organic working medium (non-azeotropic mixed working medium) as engine cooling medium, the irreversible loss that heat transfer temperature difference causes can be reduced, fully absorb the heat that engine body distributes, improve the utilization ratio of engine body heat content.
2. decompressor output power is coupled with engine output by power coupler, realizes the comprehensive utilization of motor fuel burning energy.
3. evaporate by engine body preheating and engine exhaust the mode combined, make organic working medium fully absorb the energy of engine cooling medium and exhaust, improve the utilization ratio of motor fuel burning energy.
4. utilize engine crankshaft to drive working medium pump, the minimizing extra wasted work of working medium pump and system take up room, and are conducive to the compact designed of engine power utilization system.
5., according to the difference of engine operation condition, regulate the intensity of cooling of condenser, guarantee that motor all operates in applicable temperature range under each operating mode.
6. monitor engine exhaust pipe place exhaust pressure, guarantee that vaporizer does not affect the ride quality of motor self.
Accompanying drawing explanation
Fig. 1 is engine power utilization system and controlling method schematic diagram;
Fig. 2 is control module structure diagram;
Fig. 3 is total energy approach control program flow chart;
Fig. 4 is engine-cooling system control program flow chart;
Fig. 5 is engine exhaust back pressure monitoring facilities flow chart;
Fig. 6 is operational system working pressure monitoring facilities flow chart.
In figure: 1-engine flywheel dish; 2-engine rotation speed sensor; 3-engine torque sensor; 4-control module; 5-engine exhaust mass flow sensor; 6-engine back pressure sensor; 7-engine exhaust temperature sensor; 8-normally closed solenoid valve; 9-normally open solenoid valve; 10-vaporizer; 11-evaporator outlet exhaust gas temperature sensor; 12-evaporator outlet organic working medium temperature transducer; 13-evaporator outlet organic working medium pressure transducer; 14-decompressor; 15-power coupler; 16-one-way valve; 17-condenser; 18-heat exchanger; 19-liquid container; 20-stirrer; 21-agitator motor; 22-fan driving motor; 23-cooling fan; 24-expansion valve; 25-three-way solenoid valve; 26-organic working medium mass flow sensor; 27-engine cooling water jacket outlet port organic working medium temperature transducer; 28-engine exhaust pipe; 29-engine cooling water jacket exports; The import of 30-engine cooling water jacket; 31-working medium pump; 32-coupling; 32-motor.
Embodiment
Described engine power utilization system, is connected to form successively by motor 34, three-way solenoid valve 25, vaporizer 10, decompressor 14, one-way valve 16, condenser 17, working medium pump 31, expansion valve 24 is arranged between three-way solenoid valve 25 and condenser 17, cooling fan 23 is arranged on condenser 17 leading portion, fan driving motor 22 is coaxial with cooling fan 23, working medium pump 31 is connected with engine crankshaft 33 by coupling 32, working medium pump 31 is driven to rotate by engine crankshaft 33, decompressor 14 power output shaft is connected with engine crankshaft 33 by power coupler 15, realize being coupled of decompressor 14 shaft work and motor 34 shaft work, engine exhaust pipe 28 is connected with vaporizer by normally open solenoid valve 9, engine exhaust pipe 28 connects air by normally closed solenoid valve 8,
Described condenser 17, be made up of heat exchanger 18, liquid container 19, stirrer 20, agitator motor 21, heat exchanger 18 is arranged on liquid container 19 top, and stirrer 20 and agitator motor 21 are arranged on bottom liquid container 19, and the mixed working fluid be stored in liquid container 19 stirs by stirrer 20;
Described control system, by control module 4, engine exhaust temperature sensor 7, engine back pressure sensor 5, engine exhaust mass flow sensor 6, evaporator outlet exhaust gas temperature sensor 11, evaporator outlet organic working medium temperature transducer 12, evaporator outlet organic working medium pressure transducer 13, engine cooling water jacket outlet port organic working medium temperature transducer 27, organic working medium mass flow sensor 26, engine rotation speed sensor 2, engine torque sensor 3, normally closed solenoid valve 8, normally open solenoid valve 9, three-way solenoid valve 25, agitator motor 21, fan driving motor 22, power coupler 15 is connected to form by wire harness,
Described control module, is made up of power circuit, single-chip microcomputer, variable parameter input circlult, starting circuit, switch driving circuit, motor-drive circuit, variable parameter input circlult receiving area haircut motivation exhaust gas temperature sensor 7, engine back pressure sensor 5, engine exhaust mass flow sensor 6, evaporator outlet exhaust gas temperature sensor 11, evaporator outlet organic working medium temperature transducer 12, evaporator outlet organic working medium pressure transducer 13, engine rotation speed sensor 2, engine torque sensor 3, engine cooling water jacket outlet port organic working medium temperature transducer 27, the signal that organic working medium mass flow sensor 26 exports, starting circuit receives the signal that enable switch exports, the output terminal of variable parameter input circlult is connected with single-chip microcomputer input end, the output terminal of starting circuit is connected with single-chip microcomputer input end, the input end of switch driving circuit is connected with the output terminal of single-chip microcomputer, and the output terminal of switch driving circuit is connected with normally closed solenoid valve 8, normally open solenoid valve 9, three-way solenoid valve 25, agitator motor 21, power coupler 15, the input end of motor-drive circuit is connected with the output terminal of single-chip microcomputer, and the output terminal of motor-drive circuit is connected with fan driving motor 22.
Be non-azeotropic mixed working medium R416A (R134a/R124/R600 for absorbing the working medium medium of engine body heat content and engine exhaust energy; 0.59/0.395/0.015), R416A has temperature glide phenomenon in evaporation and condenser process, can reduce the irreversible loss that heat transfer temperature difference causes.
The controlling method of engine power utilization system, it is characterized in that: gather engine exhaust temperature sensor 7, engine exhaust mass flow sensor 6, evaporator outlet exhaust gas temperature sensor 11, evaporator outlet organic working medium temperature transducer 12, evaporator outlet organic working medium pressure transducer 13, engine cooling water jacket outlet port organic working medium temperature transducer 27, organic working medium mass flow sensor 26, the signal of engine rotation speed sensor 2, the size of decompressor output power is calculated by single-chip microcomputer, inquiry decompressor operating conditions MAP, judge decompressor decompressor rotating speed whether > engine speed under this power, if decompressor rotating speed > engine speed, connect power coupler 15, decompressor output power is coupled with engine output, if decompressor rotating speed < engine speed, disconnect power coupler 15, motor individual output power,
Control module gathers engine cooling water jacket outlet port organic working medium temperature transducer 27, judge organic working medium temperature whether >363K, if Temperature of Working >363K, fan driving motor 22 rotating speed is increased by single-chip microcomputer, promote condenser 17 intensity of cooling, if Temperature of Working <363K, keep fan driving motor 22 rotating speed constant, maintain condenser 17 intensity of cooling;
Control module gathers the signal of engine back pressure sensor 5, engine rotation speed sensor 2, engine torque sensor 3, judge engine back pressure whether >0.12MPa, if engine back pressure >0.12MPa, opened by Single-chip Controlling normally closed solenoid valve 8, make part engine exhaust directly enter air, reduce engine exhaust back pressure;
Control module gathers evaporator outlet organic working medium pressure transducer 13 signal, judge organic working medium evaporating pressure whether >3.0MPa, if organic working medium evaporating pressure >3.0MPa, organic working medium is made directly to flow back to condenser by expansion valve 24 by Single-chip Controlling three-way solenoid valve 25, disconnect power coupler 15, guarantee the safe operation of system;
When system is normally run, control module 4 controls normally closed solenoid valve 8 and closes, and normally open solenoid valve 9 is opened, and three-way solenoid valve 25 makes organic working medium flow to vaporizer direction, and power coupler 15 is connected.
The present invention proposes a kind of engine power utilization system and controlling method, describes in detail by reference to the accompanying drawings to the present invention.
Represent the flow direction of organic working medium in Fig. 1 with arrow dot and dash line, the solid line with arrow in Fig. 1 represents that engine exhaust flows to.Organic working medium is stored in liquid container, by working medium pump, organic working medium pressurization is made a gift to someone engine cooling water jacket, absorb engine body heat content, realize the object of cooled engine body and heat recovery, when only having cooling circuit to work, three-way solenoid valve is communicated with expansion valve, makes organic working medium directly enter condenser, completes cooling circuit circulation; When heat to power output loop works, three-way solenoid valve is communicated with vaporizer, organic working medium is made to enter vaporizer, organic working medium absorbs engine exhaust energy and is evaporated to high temperature and high pressure gas in vaporizer, organic working medium after evaporation enters decompressor and promotes decompressor rotation acting, organic working medium after expansion enters condenser by one-way valve, completes heat to power output circuit cycle.
Be with arrow dotted line to represent wire harness direction in Fig. 1, Fig. 2 is control module structure diagram.Variable parameter input circlult receiving area haircut motivation exhaust gas temperature sensor in control module, engine back pressure sensor, engine exhaust mass flow sensor, evaporator outlet exhaust gas temperature sensor, evaporator outlet organic working medium temperature transducer, evaporator outlet organic working medium pressure transducer, engine rotation speed sensor, engine torque sensor, engine cooling water jacket outlet port organic working medium temperature transducer, the signal that organic working medium mass flow sensor exports, the output terminal of variable parameter input circlult is connected with single-chip microcomputer signal input port, the input end of switch driving circuit is connected with the output terminal of single-chip microcomputer, and the output terminal of switch driving circuit is connected with normally closed solenoid valve, normally open solenoid valve, three-way solenoid valve, agitator motor, power coupler, the input end of motor-drive circuit is connected with the output terminal of single-chip microcomputer, and the output terminal of motor-drive circuit is connected with fan driving motor.
Fig. 3 is total energy approach control program flow chart.Gather the signal of engine exhaust temperature sensor, engine exhaust mass flow sensor, evaporator outlet exhaust gas temperature sensor, evaporator outlet organic working medium temperature transducer, evaporator outlet organic working medium pressure transducer, engine cooling water jacket outlet port organic working medium temperature transducer, organic working medium mass flow sensor, engine rotation speed sensor, calculated the size of decompressor output power by single-chip microcomputer, adopt following formula to calculate decompressor output power:
In formula, N is decompressor rotating speed, unit: r/min; T is decompressor torque, unit: Nm.
Decompressor output power is calculated by above formula, inquiry decompressor operating conditions MAP, determine the actual maximum (top) speed that can arrive of decompressor under this power, judge decompressor rotating speed whether > engine speed, if decompressor rotating speed > engine speed, connect power coupler, decompressor output power is coupled with engine output, if decompressor rotating speed < engine speed, disconnect power coupler, motor individual output power.
Fig. 4 is engine-cooling system control program flow chart.Gather engine cooling water jacket outlet port organic working medium temperature transducer, judge organic working medium temperature whether >363K, if Temperature of Working >363K, fan driving motor rotating speed is increased by single-chip microcomputer, promote condenser intensity of cooling, if Temperature of Working <363K, keep fan driving motor rotating speed constant, maintain condenser intensity of cooling.
Fig. 5 is engine exhaust back pressure monitoring facilities flow chart.Gather the signal of engine back pressure sensor, engine rotation speed sensor, engine torque sensor, judge engine back pressure whether >0.12MPa, if engine back pressure >0.12MPa, opened by Single-chip Controlling normally closed solenoid valve, make part engine exhaust directly enter air, reduce engine exhaust back pressure.
Fig. 6 is operational system working pressure monitoring facilities flow chart.Gather evaporator outlet organic working medium pressure sensor signal, judge organic working medium evaporating pressure whether >3.0MPa, if organic working medium evaporating pressure >3.0MPa, organic working medium is made directly to flow back to condenser by expansion valve by Single-chip Controlling three-way solenoid valve, disconnect power coupler, guarantee the safe operation of system.
Working procedure of the present invention is as follows:
System starts: switch on power, start control module, disconnect power coupler, three-way solenoid valve and vaporizer are connected, ato unit, engine crankshaft drives working medium pump to rotate, working medium pump sends into engine cooling water jacket after organic working medium being pressurizeed, organic working medium absorbs engine body heat content and is preheated, organic working medium after preheating enters vaporizer absorption engine exhaust energy and is evaporated, organic working medium after evaporation enters decompressor and promotes decompressor acting, and the organic working medium after expansion enters condenser through one-way valve.Control module accepts engine exhaust temperature sensor, engine exhaust mass flow sensor, evaporator outlet exhaust gas temperature sensor, evaporator outlet organic working medium temperature transducer, evaporator outlet organic working medium pressure transducer, engine cooling water jacket outlet port organic working medium temperature transducer, organic working medium mass flow sensor, the signal of engine rotation speed sensor, the size of decompressor output power is calculated by single-chip microcomputer, inquiry decompressor operating conditions MAP, judge the actual rotating speed size that can arrive of decompressor decompressor under this power, if decompressor rotating speed > engine speed, connect power coupler, realize decompressor and export being coupled of shaft work and engine output shaft merit.
During system cloud gray model, moment monitoring engine exhaust temperature sensor, engine exhaust mass flow sensor, evaporator outlet exhaust gas temperature sensor, evaporator outlet organic working medium temperature transducer, evaporator outlet organic working medium pressure transducer, engine cooling water jacket outlet port organic working medium temperature transducer, organic working medium mass flow sensor, the signal of engine rotation speed sensor, the size of decompressor output power is calculated by single-chip microcomputer, inquiry decompressor operating conditions MAP, judge the actual rotating speed size that can arrive of decompressor decompressor under this power, if decompressor rotating speed < engine speed, disconnect power coupler, avoid the situation occurring that driven by engine decompressor rotates.
During system cloud gray model, moment monitoring motivation cooling jacket outlet port organic working medium temperature transducer, judge organic working medium temperature whether >363K, if Temperature of Working >363K, increase fan driving motor rotating speed by single-chip microcomputer, promote condenser intensity of cooling, if Temperature of Working <363K, keep fan driving motor rotating speed constant, maintain condenser intensity of cooling.
During system cloud gray model, the signal of moment monitoring engine back pressure sensor, engine rotation speed sensor, engine torque sensor, judge engine back pressure whether >0.12MPa, if engine back pressure >0.12MPa, opened by Single-chip Controlling normally closed solenoid valve, make part engine exhaust directly enter air, reduce engine exhaust back pressure.
During system cloud gray model, moment monitoring evaporator outlet organic working medium pressure sensor signal, judge organic working medium evaporating pressure whether >3.0MPa, if organic working medium evaporating pressure >3.0MPa, organic working medium is made directly to flow back to condenser by expansion valve by Single-chip Controlling three-way solenoid valve, disconnect power coupler, guarantee the safe operation of system.
System closing: kill engine, disconnect power coupler, disconnect control module, cut off the electricity supply.
Claims (3)
1. engine power utilization system, is characterized in that:
Described engine power utilization system, is connected to form successively by motor (34), three-way solenoid valve (25), vaporizer (10), decompressor (14), one-way valve (16), condenser (17), working medium pump (31), expansion valve (24) is arranged between three-way solenoid valve (25) and condenser (17), cooling fan (23) is arranged on condenser (17) leading portion, fan driving motor (22) is coaxial with cooling fan (23), working medium pump (31) is connected with engine crankshaft (33) by coupling (32), working medium pump (31) is driven to rotate by engine crankshaft (33), decompressor (14) power output shaft is connected with engine crankshaft (33) by power coupler (15), realize being coupled of decompressor (14) shaft work and motor (34) shaft work, engine exhaust pipe (28) is connected with vaporizer by normally open solenoid valve (9), engine exhaust pipe (28) connects air by normally closed solenoid valve (8),
Described condenser (17), be made up of heat exchanger (18), liquid container (19), stirrer (20), agitator motor (21), heat exchanger (18) is arranged on liquid container (19) top, stirrer (20) and agitator motor (21) are arranged on liquid container (19) bottom, and the mixed working fluid be stored in liquid container (19) stirs by stirrer (20);
Control system, by control module (4), engine exhaust temperature sensor (7), engine back pressure sensor (5), engine exhaust mass flow sensor (6), evaporator outlet exhaust gas temperature sensor (11), evaporator outlet organic working medium temperature transducer (12), evaporator outlet organic working medium pressure transducer (13), engine cooling water jacket outlet port organic working medium temperature transducer (27), organic working medium mass flow sensor (26), engine rotation speed sensor (2), engine torque sensor (3), normally closed solenoid valve (8), normally open solenoid valve (9), three-way solenoid valve (25), agitator motor (21), fan driving motor (22), power coupler (15) is connected to form by wire harness, engine cooling water jacket outlet port is provided with organic working medium mass flow sensor, organic working medium mass flow sensor is connected to control module,
Described control module, is made up of power circuit, single-chip microcomputer, variable parameter input circlult, starting circuit, switch driving circuit, motor-drive circuit, variable parameter input circlult receiving area haircut motivation exhaust gas temperature sensor (7), engine back pressure sensor (5), engine exhaust mass flow sensor (6), evaporator outlet exhaust gas temperature sensor (11), evaporator outlet organic working medium temperature transducer (12), evaporator outlet organic working medium pressure transducer (13), engine rotation speed sensor (2), engine torque sensor (3), engine cooling water jacket outlet port organic working medium temperature transducer (27), the signal that organic working medium mass flow sensor (26) exports, starting circuit receives the signal that enable switch exports, the output terminal of variable parameter input circlult is connected with single-chip microcomputer input end, the output terminal of starting circuit is connected with single-chip microcomputer input end, the input end of switch driving circuit is connected with the output terminal of single-chip microcomputer, and the output terminal of switch driving circuit is connected with normally closed solenoid valve (8), normally open solenoid valve (9), three-way solenoid valve (25), agitator motor (21), power coupler (15) respectively, the input end of motor-drive circuit is connected with the output terminal of single-chip microcomputer, and the output terminal of motor-drive circuit is connected with fan driving motor (22).
2. engine power utilization system according to claim 1, is characterized in that: be non-azeotropic mixed working medium R416A for absorbing the working medium medium of engine body heat content and engine exhaust energy.
3. application rights requires the method for the engine power utilization system described in 1, it is characterized in that: gather engine exhaust temperature sensor (7), engine exhaust mass flow sensor (6), evaporator outlet exhaust gas temperature sensor (11), evaporator outlet organic working medium temperature transducer (12), evaporator outlet organic working medium pressure transducer (13), engine cooling water jacket outlet port organic working medium temperature transducer (27), organic working medium mass flow sensor (26), the signal of engine rotation speed sensor (2), the size of decompressor output power is calculated by single-chip microcomputer, inquiry decompressor operating conditions MAP, judge whether decompressor decompressor rotating speed under this power is greater than engine speed, if decompressor rotating speed is greater than engine speed, connect power coupler (15), decompressor output power is coupled with engine output, if decompressor rotating speed is less than engine speed, disconnect power coupler (15), motor individual output power,
Control module gathers engine cooling water jacket outlet port organic working medium temperature transducer (27), judge whether organic working medium temperature is greater than 363K, if Temperature of Working is greater than 363K, fan driving motor (22) rotating speed is increased by single-chip microcomputer, promote condenser (17) intensity of cooling, if Temperature of Working is less than 363K, keeps fan driving motor (22) rotating speed constant, maintain condenser (17) intensity of cooling;
Control module gathers the signal of engine back pressure sensor (5), engine rotation speed sensor (2), engine torque sensor (3), judge whether engine back pressure is greater than 0.12MPa, if engine back pressure is greater than 0.12MPa, opened by Single-chip Controlling normally closed solenoid valve (8), make part engine exhaust directly enter air, reduce engine exhaust back pressure;
Control module gathers evaporator outlet organic working medium pressure transducer (13) signal, judge whether organic working medium evaporating pressure is greater than 3.0MPa, if organic working medium evaporating pressure is greater than 3.0MPa, organic working medium is made directly to flow back to condenser by expansion valve (24) by Single-chip Controlling three-way solenoid valve (25), disconnect power coupler (15), guarantee the safe operation of system;
When system is normally run, control module (4) controls normally closed solenoid valve (8) and closes, normally open solenoid valve (9) is opened, and three-way solenoid valve (25) makes organic working medium flow to vaporizer direction, and power coupler (15) is in on-state.
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| CN105317584B (en) * | 2015-11-12 | 2017-03-29 | 重庆长安汽车股份有限公司 | Automobile engine energy-recuperation system and recovery method |
| US9909461B2 (en) * | 2015-11-19 | 2018-03-06 | Borgwarner Inc. | Waste heat recovery system |
| CN107939492A (en) * | 2017-11-22 | 2018-04-20 | 北京工业大学 | A kind of waste-heat recovery device available for oil-electric vehicle |
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| EP1668226A2 (en) * | 2003-08-27 | 2006-06-14 | TTL Dynamics LTD | Energy recovery system |
| CN101240983A (en) * | 2007-02-08 | 2008-08-13 | 株式会社电装 | Exhaust heat recovery system |
| CN102619641A (en) * | 2012-04-12 | 2012-08-01 | 北京工业大学 | Power generation system using exhausting and cooling waste heat in internal combustion engine at the same time and control method therefor |
| CN102900562A (en) * | 2012-09-28 | 2013-01-30 | 北京工业大学 | Organic Rankine cycle system for recycling engine exhaust waste heat and changing heat change area of evaporator |
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| EP1668226A2 (en) * | 2003-08-27 | 2006-06-14 | TTL Dynamics LTD | Energy recovery system |
| CN101240983A (en) * | 2007-02-08 | 2008-08-13 | 株式会社电装 | Exhaust heat recovery system |
| CN102619641A (en) * | 2012-04-12 | 2012-08-01 | 北京工业大学 | Power generation system using exhausting and cooling waste heat in internal combustion engine at the same time and control method therefor |
| CN102900562A (en) * | 2012-09-28 | 2013-01-30 | 北京工业大学 | Organic Rankine cycle system for recycling engine exhaust waste heat and changing heat change area of evaporator |
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