vehicle controls

Abstract

The subject is to efficiently detect the sticking of changeover valves for realizing a plurality of supercharging modes in a vehicle provided with a plurality of superchargers, and also to realize preferable fail-safe in cases where the sticking is detected. In a vehicle, which is provided with: a primary turbo 300 and a secondary turbo 400, each of which is of an exhaust driven type; an exhaust changeover valve 210 and an intake changeover valve 21G, which are placed in a secondary exhaust passage 209 and a secondary intake passage 215 corresponding to the secondary turbo 400, respectively; and an intake bypass valve 218 placed in an intake bypass passage 217, an ECU 100 sets the opening / closing state of each changeover valve to an opening / closing state corresponding to a twin turbo mode at the time of engine stop, and it uses the drive control of each changeover valve which is necessitated in the transition to a single turbo mode at the engine start, thereby performing the sticking detection of the changeover valve at the same time.

Description

technical field [0001] The present invention relates to a control device for a vehicle having a supercharging system such as a twin turbocharger. Background technique [0002] As such a device, a device for preventing sticking of an exhaust switching valve has been proposed (for example, refer to Patent Document 1). According to the abnormality prevention control device for an engine with a supercharger disclosed in Patent Document 1, when the valve sticking state is predicted by the valve sticking state prediction unit based on the state quantities of the engine and the system or the operating conditions, the valve is forcibly driven. Exhaust switching valve. Therefore, when the exhaust switching valve is next closed, the contact position between the outer peripheral portion of the valve and the inner peripheral portion of the housing changes, preventing the valve from sticking. [0003] Also, Patent Document 2 discloses a technique for suppressing sticking by forcibly dr...

AI Technical Summary

Problems solved by technology

That is, in other words, due to the detection of sticking, the energy resources required for driving the switching valve will be wasted, and the performance of the supercharger will also be reduced, so it is not preferable at all from the viewpoint of efficiency.

[0012] In this way, in the technical ideas that can be derived from the above-mentioned various conventional technologies, there is a problem that it is difficult to efficiently detect sticking while preventing sticking.

In addition, these technical ideas lack fail-safe considerations, not to mention whether they are efficient, even if adhesion is detected, it is difficult to avoid a significant decrease in vehicle performance

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