JPH03106146U - - Google Patents

Description

[Brief explanation of the drawing]

Figure 1 is a functional block diagram showing the configuration of the present invention.
FIG. 2 is a system diagram showing one embodiment, and FIGS. 3 and 4 are flowcharts showing control contents. DESCRIPTION OF SYMBOLS 1...Turbocharger, 9...Control unit, 10...Supercharging pressure control valve, 11...Bypass passage, 12...Bypass valve, 31...
Nok sensor, 32... Spark plug.

Claims (1)

[Claims for Utility Model Registration] A boost pressure control means for bypassing a turbine and providing a bypass passage equipped with a bypass valve in an exhaust passage, and controlling the boost pressure by controlling the opening degree of the bypass valve. A turbocharged engine having basic ignition timing setting means for setting the basic ignition timing based on the operating state of the engine corresponding to each of the plurality of usable fuels with different properties, and a basic ignition timing setting means for setting the basic ignition timing based on the operating state of the engine, a correction amount setting means that increases or decreases a correction amount by a predetermined retard amount or advance amount depending on the presence or absence of a notch detected based on the base ignition timing; and an ignition controller that sets an ignition timing from the basic ignition timing and the correction amount. and a timing setting means for igniting via an ignition device at a timing corresponding to a set ignition timing, wherein the ignition timing corresponds to one type of fuel set in advance among the plurality of types of fuel. a retard amount calculation means for calculating a retard amount by subtracting the basic ignition timing, and a supercharging pressure setting means for setting a supercharging pressure to be controlled by the supercharging pressure control means based on the retard amount. A supercharging pressure control device characterized by: