Engine system and vehicle with low pressure egr
An engine system and engine technology, applied in engine components, engine cooling, machine/engine, etc., can solve problems such as unstable combustion and misfire, and achieve the effects of controllable intake air temperature, increased temperature, and improved starting performance
Active Publication Date: 2021-06-18
GREAT WALL MOTOR CO LTD
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Problems solved by technology
Cooled EGR has a certain inhibitory effect on medium and high load knocking, but it has a negative effect on combustion at low loads, and in the small load area where EGR is increased, it will cause combustion instability and a certain risk of misfire
Method used
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Embodiment Construction
[0030] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.
[0031] The EGR system is the exhaust gas recirculation system of the vehicle. After the fuel is burned in the engine, part of the exhaust gas produced is catalyzed and discharged into the atmosphere, and the other part of the exhaust gas will enter the engine after being re-pressurized. It can be burned again in the cylinder of the engine to reduce the nitrogen oxides (NOx) in the exhaust gas, so as to reduce the emission of pollutants. For the engine using the EGR system, the temperature will affect the combustion of the fuel at differen...
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The invention discloses an engine system with low-pressure EGR and a vehicle. The engine system with low-pressure EGR includes: an engine; an engine radiator, the liquid inlet of the engine radiator communicates with the liquid outlet of the engine, the The liquid outlet of the engine radiator communicates with the liquid inlet of the engine; the engine room heat exchanger; the engine room radiator, the liquid inlet of the engine room radiator communicates with the liquid outlet of the engine room heat exchanger selectively , the liquid outlet of the engine room radiator communicates with the liquid inlet of the engine room heat exchanger; wherein the liquid inlet of the engine room radiator is also selectively communicated with the engine liquid outlet, and the engine room The liquid outlet of the radiator is also communicated with the liquid inlet of the engine. The engine system with low-pressure EGR according to the present invention has good power performance and high thermal efficiency.
Description
technical field [0001] The invention relates to the field of vehicles, in particular to an engine system with low-pressure EGR and a vehicle. Background technique [0002] The engine EGR system is external EGR, which leads the exhaust gas after the catalytic converter to the front of the intake supercharger, and needs to pass through the supercharger, the intake air intercooler and the throttle valve to enter the engine cylinder. The cooled EGR has a certain inhibitory effect on knocking at medium and high loads, but it has a negative effect on combustion at low loads, and in the small load area where EGR is added, it will cause combustion instability and a certain risk of misfire. Therefore, under small loads, it is necessary to increase the coolant temperature and reduce friction while increasing combustion stability, thereby reducing the risk of misfire and reducing fuel consumption. At medium load, lower water temperature is required, which can suppress knocking to a ce...
Claims
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IPC IPC(8): F02M26/06F02M26/28F01P7/16
CPCF01P7/16F02M26/06F02M26/28
Inventor 崔亚彬宋东先鲍海江卢炯
Owner GREAT WALL MOTOR CO LTD