Air Flow Effect Of Glow Plug Squeeze Vortex

The transmission chain includes: cam → tappet → push rod → rocker arm → valve; or valve → rocker arm → push rod → tappet → cam. Air distribution phase diagram: The purpose of early opening and late closing of intake and exhaust valves is to exhaust exhaust gas from the cylinder as cleanly as possible in each working cycle, and to draw in as much fresh air into the cylinder as possible to obtain maximum power. 8. The working sequence of a six-cylinder four-stroke engine is 1-5-3-6-2-4, and the intake advance angle a=25. When the intake valve of the second cylinder is just opened, the work of each cylinder status? Answer: One cylinder: work; two cylinders: exhaust; three cylinders: compression; four cylinders: exhaust; five cylinders: compression; six cylinders: intake 9. Describe the structural characteristics of spherical, U-shaped, and swirling combustion chambers And how the mixture is formed. Answer: (1) The structural characteristics of the spherical combustion chamber: ① The top of the piston is a semi-spherical dimple. ②Using a double-hole fuel injector (with injection pressure of about 17.5MPa) placed on the edge of the pit. The glow plug ③ is equipped with a spiral inlet in the cylinder head. The formation method of mixed gas: under the action of strong intake vortex and squeezing vortex air flow, it is mainly composed of oil film evaporation and mixing. (2) Structural features of "U"-shaped combustion chamber: ①The top of the piston is a "U"-shaped pit. ②Using a single-hole injector (with injection pressure of about 12MPa), placed on the edge of the pit. ③A spiral intake port is arranged in the cylinder head. The formation of the mixture: under the action of the airflow of the intake vortex and the extrusion vortex: at low speed, it is mainly formed by spatial atomization and mixing; at high speed, it is mainly formed by oil film evaporation and mixing. (3) Swirl chamber combustion Chamber structure characteristics: ①The top of the piston is mostly a "double vortex" shaped pit. ②The auxiliary combustion chamber is spherical, conical, spherical, etc., with a relatively large volume (70-80% of the total volume). ③Axle needle injector is used. Placed in the auxiliary combustion chamber (12.5Mpa pressure). ④ The main and auxiliary combustion chambers are connected by a tangential passage. The formation method of mixed gas: It is mainly formed by spatial atomization and mixing under the action of compressed vortex and secondary vortex air flow.