CN101289975A - Throttle valve type EGR control system - Google Patents
Throttle valve type EGR control system Download PDFInfo
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- CN101289975A CN101289975A CNA2008100387339A CN200810038733A CN101289975A CN 101289975 A CN101289975 A CN 101289975A CN A2008100387339 A CNA2008100387339 A CN A2008100387339A CN 200810038733 A CN200810038733 A CN 200810038733A CN 101289975 A CN101289975 A CN 101289975A
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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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- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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- Y02T10/12—Improving ICE efficiencies
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Abstract
The invention relates to a throttle valve type EGR control system, comprising an EGR electric control system, an EGR cooler, an EGR combining cylinder valve and an inlet throttle valve. The invention is characterized in that the inlet throttle valve is arranged in an inlet pipe behind a charge air cooler, and the EGR system fetches waste gas from the front of a turbine of a supercharger, so that the waste gas is introduced to the rear of the inlet throttle valve in the inlet pipe through the EGR cooler and the EGR combining cylinder valve; the EGR electric control system consists of a sensor, a controller ECU, the EGR combining cylinder valve and the inlet throttle valve, wherein, the controller ECU detects the gasoline throttle position of an engine and a rotating speed signal through the sensor, and outputs control signals to a step motor and an electromagnetic valve; the step motor is connected with the inlet throttle valve and is used for regulating gas pressure behind the throttle valve to guarantee that enough waste gas can be sent into an inlet system under the small load working condition; and the electromagnetic valve is connected with the combining cylinder valve, is driven by compressed air, and is used for regulating EGR waste gas flow.
Description
Technical field
The present invention relates to a kind of step motor control throttle valve that utilizes, the EGR control system of combined cylinders control EGR valve.
Background technique
1, automobile exhaust gas recirculating system (EGR) exhaust-gas flow route
Can be divided into following two kinds in the diesel engine EGR mode of abroad being studied:
(1) internal EGR: the unlatching by outlet valve or special setting valve realizes exhaust gas recirculation, prevents that products of combustion from leaving cylinder and be introduced in aspirating stroke in exhaust stroke.
(2) outside EGR: the waste gas that a part is discharged is introduced gas handling system via exterior line.
What adopt usually at present is outside EGR mode, and for the diesel engine of charge inter cooling, the setting of outside EGR route can have following several mode:
(1) gets egr system after gas is back to gas compressor before the turbine, see shown in Figure 1.
(2) get egr system before gas is back to gas compressor behind the turbine, see shown in Figure 2.
Studies show that the cooling recirculation structure design of turbo-charged diesel adopts the mode of () relatively good.This is because this design can be avoided occurring:
(1) EGR gas pollutes gas compressor and intercooler.Can make gas compressor and cooler not be subjected to the influence of particulate, hydrocarbon and sulfur in the exhaust, thereby reduce and silted up and corrode the problem that is caused, and make the mass flow rate that flows through pressurized machine remain unchanged substantially;
(2) EGR difference in response.If EGR gas is introduced motor in the upstream of gas compressor and cooler, EGR gas then can occur and change the problem of response lag with engine operating condition, this is for being unacceptable by variable working condition circulation examination discharging and through the car supercharging diesel engine with direct injection of working variable working condition under of being everlasting.Adopt egr system will cause that supercharged diesel engine pressure improves, but can be by being alleviated with cooling EGR mode, this is because cold EGR has reduced the delivery space of intake manifold.
In the supercharged diesel engine egr system, EGR gas except above-mentioned two kinds of forms, also has two kinds of structural types from position that outlet pipe is derived and the position branch that imports from suction tude:
(3) get the egr system that gas drains into air inlet behind the gas compressor behind the turbine
The main pluses and minuses of this drainage position are: exhaust pressure is low, the suction pressure height; Pressurization energy consumption is big; But avoid polluting gas compressor and intercooler; Avoided influencing the pressurized machine mass flow rate; The EGR response is fast.
(4) get gas before the turbine and drain into the preceding egr system of gas compressor
The main pluses and minuses of this drainage position are: the exhaust pressure height, suction pressure is low, utilizes the reducing at compressor inlet place, can not add power delivery unit.Pressurized machine energy consumption minimum.But exhaust emission pollution gas compressor and intercooler influence the pressurized machine mass flow rate, thereby the power character of diesel engine causes adverse effect, simultaneously the EGR difference in response.
By above-mentioned four kinds of EGR exhaust-gas flow routes more as can be known, the intake method of (on the diesel engine of band intercooler, be illustrated in intercooler behind the gas compressor after) after the drainage position of EGR gas should be got gas before the turbine and drained into gas compressor.
2, the retrograde power mode of EGR gas
(1) throttle valve type EGR waste gas drainage system
Utilize the throttling of throttle valve to make suction tude generation negative pressure of vacuum come the direct exhaust circulation, its main pluses and minuses are:
Advantage: can produce bigger induction-pipe depression negative pressure, effectively drainage waste gas.
Shortcoming: the throttling action of throttle valve makes suction tude produce bigger intake resistance, influences charging efficiency, and the power character of motor is incurred loss.
(2) venturi-type EGR waste gas drainage system
The negative pressure of vacuum of utilizing Venturi tube reducing place gas flow to produce is come the direct exhaust circulation, and have following characteristics: Venturi tube reducing place can produce bigger induction-pipe depression negative pressure, drainage waste gas effectively; But the throttling action of Venturi tube reducing place makes suction tude produce bigger intake resistance, influences charging efficiency, and the power character of motor is incurred loss.
(3) one-way valve type EGR waste gas drainage system
Utilize the characteristic of the peak value of pulse pressure of exhaust back pressure,, realize the circulation of part high pressure exhaust gas with the drainage of one-way valve part greater than suction press.
(4) diffuser pipe supercharging type EGR valve waste gas drainage system
Utilize the diffuser pipe diffusion to make exhaust pressure surpass suction press and promote the high pressure exhaust gas circulation, the action effect of diffuser pipe can produce certain exhaust pressure, and direct exhaust enters suction tude effectively, and is simple and feasible.But the exhaust/intake pressure difference that produces during at a high speed big load is less, can not guarantee fully that the EGR of this type of operating mode leads coupling, if with the one-way valve fiting effect can be better.
(5) pump supercharging type EGR waste gas drainage system
Utilize suction booster to make exhaust pressure surpass suction press and come the direct high pressure waste gas circulation.Comprise two kinds of forms:
(A) oil hydraulic pump formula EGR waste gas drainage system
This system can produce bigger exhaust pressure, effectively drainage waste gas.But needing on motor increases a whole set of hydraulic system, has increased the mechanical loss work of engine-driving hydraulic system, and the machine volume of motor is strengthened.
(B) VNT pressurized machine formula EGR waste gas drainage system
This drainage system can produce bigger exhaust back pressure, effectively drainage waste gas.Turbosupercharger drives EGR and the directly proportional exhaust pressure is provided, and can guarantee that EGR leads when big load.Utilize exhaust driven gas turbine motivational drive EGR suction booster, energy loss is little, occupies little space, and structural modification is few.
The power mode characteristics that above-mentioned each EGR gas of integrated survey drives in the wrong direction have adopted throttle valve type waste gas drainage system.
3, the kind of cooling system for recycled exhaust gas and choosing
The effect of diesel engine EGR cooling control system: adopt EGR to reduce the increase that the Diesel NOx discharging can cause particulate, cooled EGR gas supply cylinder can caused under the slight situation about changing of particulate, realize reducing the purpose of NOx.
(1) electric hydaulic fan-type air cooling EGR control system
This cooling control system good cooling results, but complex structure, it is big to take up room, and need add electronic hydraulic fan and the cooling system of a cover.
(2) intercooler air cooling EGR control system
Utilize Intercooler cooling system cooling EGR gas, also must mate with charge inter cooling, good cooling results but complex structure, EGR gas also can pollute Intercooler.
(3) water cooling mode EGR control system
On engine body and cylinder cap, arrange various water-cooled heat exchangers, because the heat dissipation potential of circulating water in the hot properties of EGR gas and the machine, make the water-cooled effect relatively poor relatively, and need the design of corresponding change engine-cooling system, the power that water cooling system is consumed increases.But water cooling EGR control system compact structure, it is little to take up room, and Performance And Reliability is better.
Summary of the invention
The present invention is the control system form of the gas recirculation system (EGR) that will solve turbocharged and intercooled diesel engine, and a kind of throttle valve type EGR control system is provided.
For achieving the above object, the technical solution used in the present invention is: a kind of throttle valve type EGR control system, comprise EGR automatical control system, cooler for recycled exhaust gas, EGR combined cylinders valve, intake-air throttle valve, be characterized in: intake-air throttle valve is installed in the suction tude behind the intercooler, egr system is got waste gas before booster turbine, waste gas is through cooler for recycled exhaust gas and EGR combined cylinders valve, guide to the intake-air throttle valve in the suction tude after; The EGR automatical control system is by sensor, controller ECU, EGR combined cylinders valve, intake-air throttle valve is formed, wherein, controller ECU is by the throttle position and the tach signal of sensor motor, and to stepper motor and solenoid valve output control signal, stepper motor connects intake-air throttle valve simultaneously, be used to adjust the gas pressure behind the throttle valve, guarantee under the little load condition enough waste gas to be sent into gas handling system; Solenoid valve connects the combined cylinders valve, and uses compressed air-driven, is used to adjust the EGR exhaust gas flow.
Set up the set of gears driving mechanism between step motor shaft and the intake-air throttle valve, the reduction speed ratio of driving mechanism is 1: 5.
EGR combined cylinders valve is by cylinder A, cylinder B, cylinder C combines, the housing of cylinder A links together by two guide rods and valve body, cylinder B, housing and the guide rod of C are slidingly connected, the axle of cylinder A links together with the housing of cylinder B, the axle of cylinder B links together with the housing of cylinder C, each cylinder has two compressed-air actuated import and export, and one of them connects pressurized air, the logical atmosphere of another mouthful, each cylinder works independently and has the lift of three spools, cylinder A and cylinder B combination, cylinder A and cylinder C combination, cylinder B and cylinder C combination obtain the lift of three valve spools, cylinder A and cylinder B, and the C combination obtains the lift of two valve spools.
The stroke of cylinder A is 10mm, and the stroke of cylinder B is 11mm, and the stroke of cylinder C is 28.3mm.
The invention has the beneficial effects as follows:
The EGR gas of the intake method of (on the diesel engine of band intercooler, be illustrated in intercooler behind the gas compressor after), the drainage of throttle valve type waste gas drove in the wrong direction after the present invention chose and gets gas before the turbine and drain into gas compressor power mode and water-cooled EGR control system.In engine operation process, ECU determines motor present located operating mode according to engine speed and throttle position signal, and draw control command according to the status information and the nominal data of motor, aperture by stepper motor and solenoid valve adjusting intake-air throttle valve and combined cylinders valve, guarantee that motor has best EGR and leads under this operating mode, the NOx of cold diesel engine discharges in the final effectively reduction, reaches the Abgasgesetz of increasingly stringent.
Description of drawings
Fig. 1 is the egr system figure that gets before turbine after gas is back to gas compressor;
Fig. 2 is the egr system figure that gets behind turbine before gas is back to gas compressor;
Fig. 3 is a general structure schematic representation of the present invention;
Fig. 4 is a combined cylinders valve arrangement schematic representation;
Fig. 5 is combined cylinders and connecting rod combination schematic representation;
Fig. 6 is an EGR automatical control system block diagram.
Embodiment
The present invention is further illustrated below in conjunction with accompanying drawing and embodiment.
As shown in Figure 3, a kind of throttle valve type EGR control system of the present invention comprises EGR automatical control system, cooler for recycled exhaust gas, EGR combined cylinders valve 2, intake-air throttle valve 1.
Intake-air throttle valve 1 is installed in the suction tude behind the intercooler, and egr system is got waste gas before booster turbine, and waste gas is through cooler for recycled exhaust gas and EGR combined cylinders valve 2, guide to the intake-air throttle valve 1 in the suction tude after; The EGR automatical control system is by sensor, controller ECU, EGR combined cylinders valve 2, intake-air throttle valve 1 is formed, wherein, controller ECU is by the throttle position and the tach signal of sensor motor, and to stepper motor and solenoid valve output control signal, stepper motor connects intake-air throttle valve 1 simultaneously, be used to adjust the gas pressure after the intake-air throttle valve 1, guarantee under the little load condition enough waste gas to be sent into gas handling system; Solenoid valve connects combined cylinders valve 2, and uses compressed air-driven, is used to adjust the EGR exhaust gas flow.
In engine operation process, ECU determines motor present located operating mode according to engine speed and throttle position signal, and draw control command according to the status information and the nominal data of motor, by the aperture that stepper motor and solenoid valve are regulated intake-air throttle valve 1 and combined cylinders valve 2, guarantee that motor has best EGR and leads under this operating mode.
(1) intake-air throttle valve
Intake-air throttle valve 1 utilizes stepper motor to control, and stepper motor Location accuracy height, self-locking performance are good, but its moment of torsion is less than normal, causes easily when intake-air throttle valve 1 rotational resistance is big and loses the step.In order to guarantee intake-air throttle valve 1 reliably working, between step motor shaft and intake-air throttle valve 1, increased the set of gears driving mechanism, its reduction speed ratio is 1: 5, effective like this driving torque that increases stepper motor can guarantee system's reliably working.
(2) combined cylinders valve
The structure of combined cylinders valve 2 is seen shown in Figure 4.The housing of cylinder A links together by two guide rods 4 and valve body 3, and the housing of cylinder B, C can horizontally slip on guide rod 3.The axle of cylinder A links together with the housing of cylinder B, and the axle of cylinder B links together with the housing of cylinder C.Each cylinder has two compressed-air actuated import and export 5, when one of them connects pressurized air, and the logical atmosphere of another mouthful, the switching between the two is controlled by solenoid valve, can realize stretching out or return of spool 6 like this.Each cylinder works independently and can obtain the lift of three spools 9, and AB combination, AC combination, BC combination can obtain the lift of three valve spools, and the ABC combination can obtain the lift of two valve spools, and total can obtain the lift of eight family of power and influence's cores.The stroke of each cylinder is determined by engine test.
In order to improve the speed of response of EGR valve, adopt high-pressure air air cylinder driven EGR valve, the speed of response of cylinder can reach more than the 0.1s.Since before the turbine pressure with in cold back pressure difference bigger, in order to regulate the different opening of rotation EGR valve, adopts three cylinder block to lump together, the working method by difference cylinder makes up and reaches eight different work apertures.Combined cylinders and connecting rod are seen Fig. 5.In Fig. 5, cylinder A links together by two guide rods 4 and cylinder support 10, and cylinder support 10 usefulness bolton are on valve body.The axle of cylinder A links together by screw with the housing of cylinder B, and the housing of cylinder B can horizontally slip on two guide rods 4, and the axle of cylinder B links together by screw with the housing of cylinder C.The housing of cylinder C horizontally slips on two guide rods 4, and the axle of cylinder C tightens together with an end of extension rod 9, and the other end of extension rod 9 and connecting rod 8 are hinged, and connecting rod 8 is hinged with an end of crank 7, and the other end of crank 7 is fastened on the spool.Like this A, B, C, each cylinder separately the work of stretching out obtain three lifts, AB combination is stretched out, the AC combination is stretched out, the BC combination is stretched out and obtained three lifts, the ABC combination stretches out, shrinks and obtain two lifts, total obtains eight lifts.The optimum EGR that these eight lifts can satisfy under each operating mode leads needs.The result who optimizes according to E GR selects the different working stroke of three cylinders, the stroke 10mm of cylinder A, the stroke 11mm of cylinder B, the stroke 28.3mm of cylinder C.Combined cylinders travel parameters following table:
| EGR valve stroke sequence number | Cylinder A | Cylinder B | Cylinder C | EGR valve stroke (mm) |
| 1 | 0 | 0 | 0 | 0 |
| 2 | 1 | 0 | 0 | 10.2 |
| 3 | 0 | 1 | 0 | 11.0 |
| 4 | 0 | 0 | 1 | 28.0 |
| 5 | 1 | 1 | 0 | 21.2 |
| 6 | 1 | 0 | 1 | 38.2 |
| 7 | 0 | 1 | 1 | 39.0 |
| 8 | 1 | 1 | 1 | 49.2 |
The control of the opening and closing of cylinder is by the switching of controlling three cylinders by three air solenoid valves respectively.The control of solenoid valve is sent 0,1 signal by ECU, after drive circuit amplifies, and the power on/off of control electromagnetic valve.If with the energising of " 1 " expression solenoid valve, the cylinder guide rod stretches out cylinder, with the outage of " 0 " expression solenoid valve, cylinder guide rod withdrawal cylinder.Compressed-air actuated pressure is 0.8MPa.The real vehicle using process can be used the skidding source of the gas of automobile.
Compressed-air actuated break-make adopts 4V210-08 type solenoid valve by electromagnetic valve, and its range of working pressure is 0.15～0.8MPa, and driving voltage is 24V DC, and its material object as shown in figure 11.The effect of this kind solenoid valve is equivalent to a three-way valve, and it has an input end, two output terminals.When giving solenoid valve, input end and wherein one road output terminal conducting; When solenoid valve cuts off the power supply, input end and another road output terminal conducting.
(3) cooler for recycled exhaust gas
If EGR gas is not cooled off, then hot backflow waste gas causes the rising significantly of in-cylinder combustion temperature and pressure with heating air inlet, has offset EGR and has reduced NO
xEffect, also will produce when serious and destroy the structure of engine body.Therefore, be necessary to cool off by the EGR gas of cooler to high temperature.
The cooling of cooler for recycled exhaust gas to as if EGR gas, temperature height, and require heat exchanger to realize big heat transfer under less heat exchange area also will adapt to the big characteristics of engine luggine simultaneously.Shell and tube heat exchanger is simple in structure, and cost is low, and is adapted at the environment use down of High Temperature High Pressure.
(4) rotating speed of motor and load-measuring device
Hall transducer and magnet steel are adopted in the tachometric survey of motor, magnet steel is installed on the flywheel, Hall transducer is fixed on the flywheel casing through support, and the Hall transducer output signal links to each other with the inlet opening of single-chip microcomputer and is connected with+5V power supply by 1k Ω pull-up resistor.The Time Calculation of the signal of twice magnet steel by measuring Hall transducer goes out the rotating speed of motor.
The load of motor is determined by the voltage swing that is installed in the throttle position sensor output on the oil pump throttle control handle axle.Throttle position sensor is a potentiometer, has higher precision.Its mounting type is a three-wire system, and power supply voltage is 5V, output voltage 0～+ change between the 5V, effectively angle of swing can satisfy usage requirement greater than 90 degree after the transformation.The voltage signal of load sensor load links to each other with single-chip microcomputer by A/D.
(5) automatical control system
Automatical control system adopts single-chip microcomputer as controller, and the throttle position of detection of engine and tach signal are simultaneously to stepper motor and solenoid valve output control signal.The example, in hardware of EGR automatical control system as shown in Figure 6.
Before design control software, in advance determine that by test the best EGR under each operating mode of motor leads, and the engine speed under the best EGR of each operating mode led, throttle potentiometer magnitude of voltage, stepper motor leave in the program storage of automatical control system with the form of performance plot relative to the data such as step number, solenoid valve unlatching state of rotating of initial position in.In the engine operation process, controller is according to the engine throttle position and the tach signal that detect, the stepper motor of obtaining under the corresponding operating mode of tabling look-up in performance plot rotates step number and solenoid valve unlatching state, and, lead to guarantee the best EGR under this operating mode by intake-air throttle valve and combined cylinders valve arrival specified position that drive circuit drives stepper motor.
Claims (4)
1. throttle valve type EGR control system, comprise EGR automatical control system, cooler for recycled exhaust gas, EGR combined cylinders valve (2), intake-air throttle valve (1), it is characterized in that, described intake-air throttle valve (1) is installed in the suction tude behind the intercooler, egr system is got waste gas before booster turbine, waste gas is through cooler for recycled exhaust gas and EGR combined cylinders valve (2), guide to the intake-air throttle valve (1) in the suction tude after; The EGR automatical control system is by sensor, controller ECU, EGR combined cylinders valve (2), intake-air throttle valve (1) is formed, wherein, controller ECU is by the throttle position and the tach signal of sensor motor, and to stepper motor and solenoid valve output control signal, stepper motor connects intake-air throttle valve (1) simultaneously, be used to adjust the gas pressure after the intake-air throttle valve (1), guarantee under the little load condition enough waste gas to be sent into gas handling system; Solenoid valve connects combined cylinders valve (2), and uses compressed air-driven, is used to adjust the EGR exhaust gas flow.
2. throttle valve type EGR control system according to claim 1 is characterized in that, sets up the set of gears driving mechanism between described step motor shaft and the intake-air throttle valve, and the reduction speed ratio of driving mechanism is 1: 5.
3. throttle valve type EGR control system according to claim 1, it is characterized in that, described EGR combined cylinders valve (3) is by cylinder A, cylinder B, cylinder C combines, the housing of cylinder A links together by two guide rods (4) and valve body (3), cylinder B, the housing of C and guide rod (4) are slidingly connected, the axle of cylinder A links together with the housing of cylinder B, the axle of cylinder B links together with the housing of cylinder C, each cylinder has two compressed-air actuated import and export (5), and one of them mouth connects pressurized air, the logical atmosphere of another mouthful, each cylinder works independently and has the lift of three spools (6), cylinder A and cylinder B combination, cylinder A and cylinder C combination, cylinder B and cylinder C combination obtain the lift of three valve spools (6), cylinder A and cylinder B, and the C combination obtains the lift of two valve spools (6).
4. throttle valve type EGR control system according to claim 3 is characterized in that, the stroke of described cylinder A is 10mm, and the stroke of cylinder B is 11mm, and the stroke of cylinder C is 28.3mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2008100387339A CN101289975A (en) | 2008-06-10 | 2008-06-10 | Throttle valve type EGR control system |
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| CNA2008100387339A CN101289975A (en) | 2008-06-10 | 2008-06-10 | Throttle valve type EGR control system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101956633A (en) * | 2010-10-27 | 2011-01-26 | 湖南大学 | Exhaust gas recirculation system for internal combustion engine |
| CN102510943A (en) * | 2009-09-25 | 2012-06-20 | 卡明斯公司 | System and method for estimating egr mass flow rates |
| CN102854425A (en) * | 2012-09-29 | 2013-01-02 | 北京博润宏达科技发展有限公司 | High-speed electromagnetic valve performance detection system |
| CN103306858A (en) * | 2013-05-31 | 2013-09-18 | 潍柴动力股份有限公司 | EGR (exhaust gas recirculation) air mixing device and fuel engine with EGR system |
| CN105134373A (en) * | 2015-08-19 | 2015-12-09 | 天津大学 | Novel engine based on controllable combustion reaction path and control method of novel engine |
| CN109236513A (en) * | 2018-11-12 | 2019-01-18 | 吉林工程技术师范学院 | Air supply system is used in a kind of optimization of supercharged diesel engine transient condition performance |
| CN110145417A (en) * | 2019-06-28 | 2019-08-20 | 潍柴动力股份有限公司 | It is a kind of for promoting the pressurizing device of EGR rate |
-
2008
- 2008-06-10 CN CNA2008100387339A patent/CN101289975A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102510943A (en) * | 2009-09-25 | 2012-06-20 | 卡明斯公司 | System and method for estimating egr mass flow rates |
| CN101956633A (en) * | 2010-10-27 | 2011-01-26 | 湖南大学 | Exhaust gas recirculation system for internal combustion engine |
| CN102854425A (en) * | 2012-09-29 | 2013-01-02 | 北京博润宏达科技发展有限公司 | High-speed electromagnetic valve performance detection system |
| CN103306858A (en) * | 2013-05-31 | 2013-09-18 | 潍柴动力股份有限公司 | EGR (exhaust gas recirculation) air mixing device and fuel engine with EGR system |
| CN103306858B (en) * | 2013-05-31 | 2016-09-07 | 潍柴动力股份有限公司 | EGR air mixing device and the fuel engines of band egr system |
| CN105134373A (en) * | 2015-08-19 | 2015-12-09 | 天津大学 | Novel engine based on controllable combustion reaction path and control method of novel engine |
| CN105134373B (en) * | 2015-08-19 | 2017-11-28 | 天津大学 | Based on the regulatable engine in combustion reaction path and its regulation and control method |
| CN109236513A (en) * | 2018-11-12 | 2019-01-18 | 吉林工程技术师范学院 | Air supply system is used in a kind of optimization of supercharged diesel engine transient condition performance |
| CN110145417A (en) * | 2019-06-28 | 2019-08-20 | 潍柴动力股份有限公司 | It is a kind of for promoting the pressurizing device of EGR rate |
| CN110145417B (en) * | 2019-06-28 | 2023-12-15 | 潍柴动力股份有限公司 | Pressurizing device for improving EGR rate |
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Open date: 20081022 |