US 12,123,378 B1
Cylinder gas recirculation system device of internal combustion engine based on pressure differential driving
Tianyou Wang, Tianjin (CN); Tianlong Lu, Tianjin (CN); and Zhen Lu, Tianjin (CN)
Assigned to Tianjin University, Tianjin (CN)
Filed by Tianjin University, Tianjin (CN)
Filed on Jul. 30, 2024, as Appl. No. 18/789,623.
Application 18/789,623 is a continuation of application No. PCT/CN2022/140120, filed on Dec. 19, 2022.
Int. Cl. F02M 26/23 (2016.01); F02B 25/26 (2006.01); F02M 26/16 (2016.01); F02M 26/34 (2016.01)
CPC F02M 26/23 (2016.02) [F02M 26/16 (2016.02); F02M 26/34 (2016.02); F02B 25/26 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A cylinder gas recirculation system device of an internal combustion engine based on pressure differential driving, comprising: a cylinder block of the internal combustion engine, a cylinder, a CGR intake valve, a CGR exhaust valve, a CGR intake control valve, a CGR exhaust control valve, a CGR surge tank, an exhaust port, a turbine, a gas compressor, a scavenging box, a glow plug, a pressure sensor and a gas outlet valve, wherein a gas recirculation device comprises two parts: a CGR passage system and a CGR gas storage system;
wherein the CGR intake valve, the CGR intake control valve, the CGR surge tank, the CGR exhaust control valve, and the CGR exhaust valve are sequentially connected to form a gas recirculation subsystem;
wherein the CGR intake control valve is in communication with the CGR surge tank to serve as an intake passage in the CGR passage system, and the CGR surge tank is in communication with the CGR exhaust control valve to serve as an exhaust passage in the CGR passage system;
wherein two adjacent gas recirculation subsystems are in communication via a CGR intake pipe; an internal combustion engine with a four-cylinder structure comprises four gas recirculation subsystems connected in pairs; and an internal combustion engine with a six-cylinder structure comprises six gas recirculation subsystems connected in pairs, and so on;
wherein the surge tank is provided with the glow plug, the pressure sensor, and the gas outlet valve to form the CGR gas storage system; and
wherein exhaust gas generated by the combustion of the engine enters the turbine via the exhaust port and is finally discharged into the atmosphere; fresh air firstly enters the gas compressor, and enters the scavenging box after being cooled by a condenser; and an outlet of the scavenging box is connected to a scavenging port in the cylinder block of the internal combustion engine, thereby delivering the fresh air to the cylinder.