JPS6290941U - - Google Patents

Description

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, in which Fig. 1 is a structural diagram of a supercharged diesel engine, Fig. 2 is a flowchart showing various functions of the controller shown in Fig. 1, and Fig. 3 is a flowchart showing various functions of the controller shown in Fig. 1. The figure is a characteristic diagram showing an example of sudden acceleration operation of the engine in Figure 1, Figure 4 is a timing chart of the three vacuum switching valves in Figure 1, and Figure 5 is a characteristic diagram comparing turbo lag with the conventional example. . In the figure, 1 is a diesel engine, 3 and 4 are turbines and compressors that constitute a supercharger, 8 is a main part of an exhaust gas recirculation system, 13 is a control section, 21 is a waste gate valve, 22 is a boost pressure supply pipe, V ₃ is a third vacuum switching valve which is a shutoff valve.

Claims (1)

[Scope of utility model registration request] An exhaust recirculation device that determines the exhaust recirculation area according to the load, a cutoff valve that cuts off the boost pressure supply and shuts off the gate valve by operating the boost pressure supply piping that adjusts the wastegate valve opening, and a cutoff valve that adjusts the wastegate valve opening depending on the load. A turbocharged diesel engine equipped with a controller that operates a cutoff valve for a predetermined period of time when the exhaust gas leaves the exhaust recirculation area.