CN102678287A - Engine exhaust energy recycling system inside cylinder and recycling method of engine exhaust energy recycling system - Google Patents
Engine exhaust energy recycling system inside cylinder and recycling method of engine exhaust energy recycling system Download PDFInfo
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Abstract
The invention discloses an engine exhaust energy recycling system inside a cylinder and a recycling method of the engine exhaust energy recycling system. The recycling system comprises a gas compressor, a gas distributing mechanism, the cylinder, a turbine, a heat exchanger, a booster water pump, a drain pipe, a bypass pipe, an exhaust pipe and a heat exchanger gas outlet pipe, wherein the heat exchanger gas outlet pipe, the bypass pipe and the drain pipe are connected by a tee joint, and the drain pipe is mounted on the turbine. The recycling method includes firstly, converting exhaust heat energy into pressure energy of superheated steam; secondly, converting the pressure energy of the superheated steam into rotation mechanical energy of a turbocharger by means of steam injection at the front of the turbine so that outlet parameters of the gas compressor are increased; and thirdly, adjusting the gas distributing mechanism to finally complete an integral process for recycling the exhaust energy discharged by an engine in the manner of positive work of pump gas. The integral process for recycling the exhaust energy is completed inside the cylinder by means of adjusting the gas distributing mechanism, heat efficiency of the engine can be effectively improved, output power of the engine is increased, and the engine exhaust energy recycling system and the recycling method are feasible.
Description
Technical field
The present invention relates to a kind of engine exhaust energy-recuperation system and method thereof, specifically is reclaiming system and recovery method thereof in a kind of engine exhaust energy cylinder.
Background technique
From the thermal equilibrium of present motor, the power that is used for power output only accounts for the 40%-50% (diesel engine) or the 25%-40% (petrol engine) of oil inflame total amount of heat, and other heat then is drained in the atmosphere environment via cooling system and waste gas.Therefore, recycling engine exhaust heat is the effective way that improves engine thermal efficiency.
From the technological approaches of domestic and international exhaust energy utilization, have refrigeration, heating, thermo-electric generation, fuel catalytic reform, after connect power turbine, install mode such as power circulating device additional.Because exhaust energy has the advantages that grade is low, recovery is relatively more difficult; Make more existing technology still have many problems; As utilize the energy conversion efficiency of thermo-electric generation not high, and adopt relatively difficulty of fuel catalytic reformation technology implementation process, utilize utilizing waste heat for refrigeration and heating purposes more single; Power turbine Applicable scope is narrower, after connect power circulating device structure more complicated or the like.
Chinese patent publication number CN1363764A; Open day on August 14th, 2002; The name of invention is called boosting system for steaming turbine of IC engine; This application case discloses a kind ofly utilizes engine exhaust heat energy heating liquid water, and the overheated steam after will heating is injected into the turbine promoting the circulation of qi vapour that advances and mixes and increase the turbine expansion merit, thereby reaches the boosting system for steaming turbine that improves the engine section load performance.Because the motor inlet condition receives the constraint of conditions such as pressure of explosion under the high load operating mode, therefore limited the energy recovery of boosting system for steaming turbine under high operating mode.
Summary of the invention
The present invention has overcome the above-mentioned deficiency that exists in the existing technology, and reclaiming system and recovery method thereof in a kind of engine exhaust energy cylinder are provided.It can improve the turbosupercharged engine thermal efficiency, improve the turbosupercharged engine output power.
The present invention realizes through following technological scheme.
Reclaiming system in a kind of engine exhaust energy cylinder; Comprise gas compressor, distribution device, cylinder, turbine, heat exchanger, booster water pump, drainage tube, outlet pipe, bypass tube, heat exchanger steam outlet pipe; Wherein, Distribution device is installed on the cylinder, and the water outlet of the air outlet of turbine steam outlet pipe, the suction port of outlet pipe, booster water pump outlet pipe, the suction port of heat exchanger steam outlet pipe all are connected with heat exchanger, and heat exchanger steam outlet pipe, bypass tube and drainage tube are connected through three-way pipe; Drainage tube is installed on the gas inlet casing; The import and export of gas compressor are connected with the air outlet of compressor air inlet machine pipe and the suction port of gas compressor steam outlet pipe respectively, and the air outlet of gas compressor steam outlet pipe is connected with cylinder, and the air inlet/outlet of turbine is connected with the air outlet of gas inlet casing and the suction port of turbine steam outlet pipe respectively; The suction port of gas inlet casing is connected with cylinder, and the import and export of booster water pump are connected with the water outlet of booster water pump intake pipe and the water intake of booster water pump outlet pipe respectively.
Said distribution device is the distribution device of VVT and lift.
Reclaiming system in the said engine exhaust energy cylinder also comprises flow control valve and bypass valve, and wherein, flow control valve is installed on the drainage tube, and bypass valve is installed on the bypass tube.
A kind of recovery method that utilizes reclaiming system in the said engine exhaust energy cylinder comprises the steps:
Step 1: water is converted into the pressure energy that HTHP has the water vapour of acting ability through the heat energy from waste gas of the high-temperature low-pressure that heat exchanger is discharged motor;
Step 2: the turbine of flowing through of the water vapour with acting ability is converted into the rotating mechanical energy of turbosupercharger with pressure energy, and makes the outlet parameter of gas compressor increase;
Step 3: through regulating maximum outbreak pressure that closing of intake valve in the distribution device guarantee motor correct time within tolerance zone; Because engine charge pressure enlarges markedly, exhaust energy is finally accomplished the whole recovery process with the form of pump gas positive work in cylinder simultaneously.
Motor is when annotating the running of vapour operating mode, and water is through the water pump effect heat exchanger of flowing through, and the waste gas of discharging with motor is thermal source, and the vaporization endothermic process takes place, and heat energy from waste gas is converted into the pressure energy of the water vapour with acting ability; Before water vapour with acting ability was injected into turbine, the acting of in turbine, expanding was used for increasing the output work of turbine; Before the whirlpool, annotate after the vapour; The turbine output that increases makes the blower outlet parameter of coaxial connection become big; Change IC Intake Valve Closes correct time through regulating distribution device, change the air inflow of actual entering motor, with this maximum explosive pressure that guarantees motor within tolerance zone; Because the acting ability of the feasible turbine humidify fuel gas of flowing through of steam injection process obviously increases before the whirlpool; The outlet pressure of gas compressor significantly increases; Pressure just has increase because of flow before the whirlpool increases slightly before the whirlpool simultaneously, so the engine exhaust energy that warp vaporization heat absorption is recovered to is accomplished the whole recovery process with the form of pump gas positive work in cylinder.
The present invention through the maximum explosive pressure regulating closing of intake valve and guarantee motor correct time within tolerance zone, thereby realize that exhaust energy accomplishes the whole recovery process with the form of pump gas positive work in cylinder, its beneficial effect comprises:
(1) adopts said energy-recuperation system that the motor maximum explosive pressure is controlled within the tolerance zone, solved the difficult problem that pressure of explosion limits energy recovery under the high operating mode;
(2) adopt said energy-recuperation system can effectively improve the thermal efficiency of motor, reduce fuel consume;
(3) adopt said energy-recuperation system under the constant condition of motor complete machine structure, can realize, having simple in structure, lower-cost advantage through increasing some optional equipments than other exhaust energy way of recycling that installs power circulating device additional.
Description of drawings
Fig. 1 is a system architecture schematic representation of the present invention;
Fig. 2 is the inventive method effect schematic representation.
Among the figure, 1 is gas compressor, and 2 is distribution device, and 3 is cylinder, and 4 is turbine; 5 is heat exchanger, and 6 is booster water pump, and 7 is bypass valve, and 8 is flow control valve, and 9 is the compressor air inlet machine pipe; 10 is the gas compressor steam outlet pipe, and 11 is gas inlet casing, and 12 is drainage tube, and 13 is bypass tube, and 14 is the turbine steam outlet pipe; 15 is outlet pipe, and 16 is the booster water pump intake pipe, and 17 is the booster water pump outlet pipe, and 18 is the heat exchanger steam outlet pipe.
Embodiment
Elaborate in the face of embodiments of the invention down: present embodiment provided detailed mode of execution and concrete operating process, but protection scope of the present invention is not limited to following embodiment being to implement under the prerequisite with technological scheme of the present invention.
Reclaiming system in a kind of the engine exhaust energy cylinder; Comprise gas compressor, distribution device, cylinder, turbine, heat exchanger, booster water pump, drainage tube, bypass tube, outlet pipe, heat exchanger steam outlet pipe; Wherein, Distribution device is installed on the cylinder, and the water outlet of the air outlet of turbine steam outlet pipe, the suction port of outlet pipe, booster water pump outlet pipe, the suction port of heat exchanger steam outlet pipe all are connected with heat exchanger, and heat exchanger steam outlet pipe, bypass tube and drainage tube are connected through three-way pipe; Drainage tube is installed on the gas inlet casing; The import and export of gas compressor are connected with the air outlet of compressor air inlet machine pipe and the suction port of gas compressor steam outlet pipe respectively, and the air outlet of gas compressor steam outlet pipe is connected with cylinder, and the air inlet/outlet of turbine is connected with the air outlet of gas inlet casing and the suction port of turbine steam outlet pipe respectively; The suction port of gas inlet casing is connected with cylinder, and the import and export of booster water pump are connected with the water outlet of booster water pump intake pipe and the water intake of booster water pump outlet pipe respectively.
Said distribution device is the distribution device of VVT and lift.
Reclaiming system in the said engine exhaust energy cylinder also comprises flow control valve and bypass valve, and wherein, flow control valve is installed on the drainage tube, and bypass valve is installed on the bypass tube.
A kind of recovery method that utilizes reclaiming system in the said engine exhaust energy cylinder comprises the steps:
Step 1: water is converted into the pressure energy that HTHP has the water vapour of acting ability through the heat energy from waste gas of the high-temperature low-pressure that heat exchanger is discharged motor;
Step 2: the turbine of flowing through of the water vapour with acting ability is converted into the rotating mechanical energy of turbosupercharger with pressure energy, and makes the outlet parameter of gas compressor increase;
Step 3: through regulating maximum outbreak pressure that closing of intake valve in the distribution device guarantee motor correct time within tolerance zone; Because engine charge pressure enlarges markedly, exhaust energy is finally accomplished the whole recovery process with the form of pump gas positive work in cylinder simultaneously.
Be specially:
As shown in Figure 1, reclaiming system in the engine exhaust energy cylinder that present embodiment provides comprises:
Gas compressor 1, distribution device 2, cylinder 3, turbine 4, heat exchanger 5, booster water pump 6, drainage tube 12, bypass tube 13, outlet pipe 15, heat exchanger steam outlet pipe 18; Wherein, Distribution device 2 is installed on the cylinder 3; Heat exchanger steam outlet pipe 18, bypass tube 13 and drainage tube 12 threeways connect, and drainage tube 12 is installed on the gas inlet casing 11.The import and export of gas compressor 1 are connected with the air outlet of compressor air inlet machine pipe 9 and the suction port of gas compressor steam outlet pipe 10 respectively, and the air outlet of gas compressor steam outlet pipe 10 is connected with cylinder.The air inlet/outlet of turbine 4 is connected with the air outlet of gas inlet casing 11 and the suction port of turbine steam outlet pipe 14 respectively; The suction port of the water outlet of the suction port of the air outlet of turbine steam outlet pipe 14, outlet pipe 15, booster water pump outlet pipe 17, heat exchanger steam outlet pipe 18 all is connected with heat exchanger, and the suction port of gas inlet casing 11 is connected with cylinder.The import and export of booster water pump 6 are connected with the water outlet of booster water pump intake pipe 16 and the water intake of booster water pump outlet pipe 17 respectively.Also comprise flow control valve 8 and bypass valve 7, flow control valve 8 is installed on the drainage tube 12, and bypass valve 7 is installed on the bypass tube 13.
As shown in Figure 2, recovery method may further comprise the steps in the engine exhaust energy cylinder that present embodiment provides:
Step 1: water is converted into the pressure energy that HTHP has the water vapour of acting ability through the heat energy from waste gas of the high-temperature low-pressure that heat exchanger 5 is discharged motor;
Step 2: the turbine 4 of flowing through of the water vapour with acting ability is converted into the rotating mechanical energy of turbosupercharger with pressure energy, and makes the outlet parameter of gas compressor 1 become big;
Step 3: through regulating maximum outbreak pressure that closing of intake valve in the distribution device 2 guarantee motor correct time within tolerance zone; Because engine charge pressure enlarges markedly, exhaust energy is finally accomplished the whole recovery process with the form of pump gas positive work in cylinder simultaneously.
Motor is not when annotating the running of vapour operating mode; Be former machine running operating mode; Air compresses the boost pressure that reaches expection, the cylinder 3 of under the effect of distribution device 2, flowing through, the turbine 4 of after the cylinder inner cyclic process becomes waste gas, flowing through through gas compressor 1; Exhaust flow after the acting of expanding is drained in the atmosphere environment after heat exchanger 5.
Motor is when annotating the running of vapour operating mode, and water is issued to certain working pressure in the effect of booster water pump 6, after heat exchanger 5, becomes overheated steam.In heat exchanger 5, water is with high-temperature low-pressure waste gas generation heat exchange, and whole process can be similar to the constant-pressure heating process of regarding water as.So far, the heat energy in the high-temp waste gas is converted into the pressure energy that HTHP has the water vapour of acting ability through heat exchanger.
Overheated steam is at flow control valve 8, and under the control of bypass valve 7, in the pipeline of spray before the turbine, the waste gas generation gas vapour mixed process of before turbine, discharging with cylinder 3 finally reaches identical temperature.Turbine 4 acting of expanding of flowing through of humidify fuel gas after mixing, the heat exchanger 5 of finally flowing through is drained in the atmosphere environment.Because the injection of overheated steam makes the turbine merit enlarge markedly before the turbine, the turbine merit of increase makes the gas compressor pressure ratio and the flow of coaxial connection significantly increase.
Outlet parameter for gas compressor 1 increase; Adopt the method for regulating distribution device 2 to make intake valve shift to an earlier date or late release; Control actual entering engine air capacity and suction pressure, and then the maximum explosive pressure of limiting engine is within tolerance zone.Guaranteeing have under the condition of identical air mass flow with former facility; Can obviously find out according to turbosupercharger energy balance relations formula; The turbine merit that increases will make that suction pressure significantly improves; And then pump gas positive work significantly increases, and so far exhaust energy is accomplished the whole recovery process with the form of pump gas positive work in cylinder.
In order to guarantee that motor has coupling preferably with turbosupercharger under each operating mode, said distribution device can be the distribution device of VVT and lift.In order to guarantee that motor can steady running under the operating mode of not annotating vapour, said heat exchanger should allow dry-running.
More than combine the accompanying drawing specific embodiments of the invention to be described; But these explanations can not be understood that to have limited scope of the present invention; Protection scope of the present invention is limited the claims of enclosing, and any change on claim of the present invention basis all is protection scope of the present invention.
Claims (4)
1. reclaiming system in the engine exhaust energy cylinder; It is characterized in that; Comprise gas compressor, distribution device, cylinder, turbine, heat exchanger, booster water pump, drainage tube, outlet pipe, heat exchanger steam outlet pipe and bypass tube; Wherein, Distribution device is installed on the cylinder, and the water outlet of the air outlet of turbine steam outlet pipe, the suction port of outlet pipe, booster water pump outlet pipe, the suction port of heat exchanger steam outlet pipe all are connected with heat exchanger, and heat exchanger steam outlet pipe, bypass tube and drainage tube are connected through three-way pipe; Drainage tube is installed on the gas inlet casing; The import and export of gas compressor are connected with the air outlet of compressor air inlet machine pipe and the suction port of gas compressor steam outlet pipe respectively, and the air outlet of gas compressor steam outlet pipe is connected with cylinder, and the air inlet/outlet of turbine is connected with the air outlet of gas inlet casing and the suction port of turbine steam outlet pipe respectively; The suction port of gas inlet casing is connected with cylinder, and the import and export of booster water pump are connected with the water outlet of booster water pump intake pipe and the water intake of booster water pump outlet pipe respectively.
2. reclaiming system in the engine exhaust energy cylinder according to claim 1 is characterized in that said distribution device is the distribution device of VVT and lift.
3. reclaiming system in the engine exhaust energy cylinder according to claim 1 and 2 is characterized in that also comprise flow control valve and bypass valve, wherein, flow control valve is installed on the drainage tube, and bypass valve is installed on the bypass tube.
4. a recovery method that utilizes reclaiming system in the engine exhaust energy cylinder as claimed in claim 1 is characterized in that, comprises the steps:
Step 1: water is converted into the pressure energy that HTHP has the water vapour of acting ability through the heat energy from waste gas of the high-temperature low-pressure that heat exchanger is discharged motor;
Step 2: the turbine of flowing through of the water vapour with acting ability is converted into the rotating mechanical energy of turbosupercharger with pressure energy, and makes the outlet parameter of gas compressor increase;
Step 3: through regulating maximum outbreak pressure that closing of intake valve in the distribution device guarantee motor correct time within tolerance zone; Because engine charge pressure enlarges markedly, exhaust energy is finally accomplished the whole recovery process with the form of pump gas positive work in cylinder simultaneously.
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Cited By (4)
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| CN104500218A (en) * | 2014-11-26 | 2015-04-08 | 上海交通大学 | System capable of simultaneously improving low-speed working condition performance, high-speed working condition fuel efficiency, NOx emission and transient performance of internal combustion engine |
| CN108757163A (en) * | 2018-05-11 | 2018-11-06 | 华南理工大学 | A kind of turbine composite internal combustion engine residual heat using device and its control method |
| CN112377280A (en) * | 2020-11-04 | 2021-02-19 | 哈尔滨工程大学 | Supercharged engine exhaust energy gradient utilization system and utilization method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108757163A (en) * | 2018-05-11 | 2018-11-06 | 华南理工大学 | A kind of turbine composite internal combustion engine residual heat using device and its control method |
| CN112377280A (en) * | 2020-11-04 | 2021-02-19 | 哈尔滨工程大学 | Supercharged engine exhaust energy gradient utilization system and utilization method thereof |
| CN112377280B (en) * | 2020-11-04 | 2023-05-05 | 哈尔滨工程大学 | Exhaust energy cascade utilization system of supercharged engine and utilization method thereof |
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Application publication date: 20120919 |