CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

摘要

Supply a control device for an internal combustion engine in which an abnormality of an exhaust-bypass valve, such as a WGV, can be certainly detected under wide operation conditions.;In the control device, a required-operation position of the exhaust-bypass valve, which is set in accordance with an operating condition of the internal combustion engine, is set to a target position, and an exhaust-bypass-valve-driving device is controlled in such a way that a real position, which is detected by a position sensor, agrees with the target position, and when a real position, which is detected by a position sensor, reaches a predetermined abnormality-judgment value, it is judged that an abnormality is caused in a mechanical-connecting condition from the exhaust-bypass valve to the exhaust-bypass-valve-driving device.

主权项

1. A control device for an internal combustion engine, comprising:
a turbocharger including a turbine which is provided at an exhaust passage of the internal combustion engine, and a compressor which is provided at an intake air passage of the internal combustion engine so as to be integrally rotated with the turbine; an exhaust-bypass valve which is provided at an exhaust-bypass passage for linking an upstream side and an downstream side of the turbine so as to control a flow rate of exhaust gas, which flows through the exhaust-bypass passage, of the internal combustion engine; an exhaust-bypass-valve-driving device which is mechanically connected to the exhaust-bypass valve so as to regulate an operation position of the exhaust-bypass valve; a position sensor for detecting the operation position of the exhaust-bypass valve so as to assign the operation position to a real position; a required-exhaust-bypass-valve-operation-position-setting component for setting a required-exhaust-bypass-valve-operation position of the exhaust-bypass valve in accordance with an operating condition of the internal combustion engine; a target-position-setting component for setting the required-exhaust-bypass-valve-operation position, which is set by the required-exhaust-bypass-valve-operation-position-setting component, to a target position; an exhaust-bypass-valve-control component for controlling the exhaust-bypass-valve-driving device in such a way that the real position, which is detected by the position sensor, agrees with the target position which is set by the target-position-setting component; and an abnormality-judgment component for judging that an abnormality is caused in a mechanical-connecting condition from the exhaust-bypass valve to the exhaust-bypass-valve-driving device when the real position, which is detected by the position sensor, reaches a predetermined abnormality-judgment value.