-
Patent Agency Ranking
1.发明申请公开(公告)号：US20210123388A1
公开(公告)日：2021-04-29
申请号：US17078360
申请日：2020-10-23
Applicant: Tianjin University
Inventor： Haifeng LIU , Can WANG , Mingchao LIU , Mingfa YAO , Zunqing ZHENG , Hu WANG
IPC: F02D41/00 , F02M35/10 , F02M35/024 , F02M35/104 , F01N11/00 , F01N3/10 , F02D41/14 , F02C3/02
Abstract: The present disclosure discloses an intake oxygen concentration control system suitable for an engine with lean NOx trapping technology. The system adopts an exhaust turbocharging device to provide a pressure difference for an oxygen-enriched membrane to generate oxygen-rich and oxygen-deficient gases, and controls the intake oxygen concentration of different cylinders by adjusting the opening of flow control valves to match lean and rich combustion cycles of a lean NOx trapping system. In a lean combustion cycle, all four cylinders are filled with an oxygen-rich gas, which can make the combustion more complete and improve the thermal efficiency and fuel economy. In a rich combustion cycle, one of the four cylinders is filled with an oxygen-deficient gas, and the other three cylinders are filled with air or an oxygen-rich gas with a low concentration, so that less fuel is required to create a reducing atmosphere to realize the release and reduction of NOx in a lean NOx trapping device, thereby reducing the fuel consumption and ensuring the output power of the other three cylinders.
-
2.发明申请公开(公告)号：US20210277842A1
公开(公告)日：2021-09-09
申请号：US16346538
申请日：2018-03-29
Applicant: Tianjin University
Inventor： Haifeng LIU , Junsheng MA , Guixiang MA , Zihan HE , Mingfa YAO , Zunqing ZHENG , Hu WANG
Abstract: The present invention discloses a cold start operation device and control method for a diesel engine in a plateau region under a low ambient temperature, allowing a starter to drive a piston to compress the low-temperature air, by using the heated air as the fresh inlet air to introduce it into the cylinder, so that the in-cylinder temperature at the compressing TDC is increased to obtain the ignition temperature, and finally achieving the cold start of diesel engines in plateau regions. The present invention avoids complicated preheating devices, and has simple structure and reliable performance, can achieve effective cold start in different low ambient temperature environments.
-
公开(公告)号：US20210095604A1
公开(公告)日：2021-04-01
申请号：US16301721
申请日：2018-03-23
Applicant: TIANJIN UNIVERSITY
Inventor： Mingfa YAO , Yang WANG , Hu WANG , Haifeng LIU , Zunqing ZHENG , Shan MI
Abstract: The present invention discloses a control method of variable stroke engine for reforming high-octane fuel under the FCE mode, the ECU connected to the engine controls the amount of fuel injected from the flexible cylinder injector to the flexible cylinder and controls the switch state of inlet valve and exhaust valve of the flexible cylinder, so that the flexible cylinder can be switched between two-stroke mode and four-stroke mode according to the actual engine operating conditions; when the engine is at a small load and needs to promote combustion stability, the flexible cylinder injector injects a rich fuel with equivalence ratio greater than 1 into the flexible cylinder, the flexible cylinder is at two-stroke mode; when the engine is at a large load and needs sufficient power output, the flexible cylinder injector injects a conventional fuel into the flexible cylinder, said flexible cylinder is at four-stroke mode.
-
公开(公告)号：US20170145966A1
公开(公告)日：2017-05-25
申请号：US15268586
申请日：2016-09-18
Applicant: Tianjin University
Inventor： Mingfa YAO , Yang WANG , Guorui JIA , Hu WANG , Lixia WEI
CPC classification number: F02M26/04 , F02B37/00 , F02B47/08 , F02B47/10 , F02M26/05 , F02M26/22 , F02M26/43 , F02M26/51 , F02M26/53 , Y02T10/121 , Y02T10/144
Abstract: The present invention discloses a novel engine controlled by combustion reaction path, which cylinders comprise working cylinders and reforming cylinders. According to the operational condition of engine, the engine is used for compressing, heating and reforming the fuel injected from the reforming cylinder injector; by controlling the reaction boundary conditions between fuel and air, the reforming cylinder can exhaust partial intermediate products or oxidation products of the different oxidation stages; the products are then mixes with the inlet air in the pre-mixing chamber and then is introduced into the working cylinder. Under operating in different working conditions, the engine can discharge the mixed gas with different activities under different oxidation stages by regulating the corresponding boundary conditions of the reforming reaction of the reforming cylinder, and can achieve concentration stratification and activity stratification of the mixed gas in the working cylinder by using the fuel injected from the working cylinder injectors, and can effectively achieve high effectiveness and broaden the scope of clean combustion by changing the combustion reaction path. The present invention just adopts simple oxidation reaction post-treatment device, and then the emission of the engine can meet the requirement of EuroVI emission regulation.
-
公开(公告)号：US20210332302A1
公开(公告)日：2021-10-28
申请号：US16322116
申请日：2018-03-28
Applicant: Tianjin University
Inventor： Haifeng LIU , Guixiang MA , Junsheng MA , Mingfa YAO , Zunqing ZHENG , Hu WANG
Abstract: The present invention a mixed fuel suitable for diesel engines, which consists of the following components by volume percentage: 35% to 37.5% of diesel, 35% to 37.5% of ethanol and 25% to 30% of PODE, wherein the diesel is petroleum diesel having a cetane number not less than 48; the purity of the ethanol by mass percentage is not less than 99.5%; and, the PODE is a mixture of two fuels shown by molecular formulae CH3O(CH2O)3CH3 and CH3O(CH2O)4CH3. The use of this fuel is advantageous for emission reduction.
-
-
-
-
Search Results
5
records
(took 0.033 seconds)
