Abstract: To provide controller and control method for internal combustion engine that can suppress motor built in actuator from overheating when waste gate valve is controlled to near fully closed position or fully opened position, and can suppress from causing deterioration of fuel efficiency by consuming large power wastefully even in light load operation region in which pressure of exhaust gas is low relatively. A controller for internal combustion engine calculates basic operating amount for bringing real opening degree close to target opening degree; calculates an operating amount obtained by performing upper limitation of basic operating amount by first limit value, as final operating amount, in case of supercharging driving state; and calculates an operating amount obtained by performing upper limitation of basic operating amount by second limit value smaller than first limit value, as final operating amount, in case of non-supercharging driving state.

Abstract: While an actuator is driven by an actuator driving unit with an operation amount for which the maximum value is limited by an operation amount limitation unit, if a state in which the actual opening degree of a wastegate valve does not coincide with a target opening degree has continued for a predetermined time period, driving by the actuator driving unit is attempted with an operation amount for which the maximum value limitation is relaxed by an operation amount limitation relaxing unit. Even after this, if the state in which the actual opening degree of the wastegate valve does not coincide with the target opening degree still has not been eliminated, an abnormality determination unit determines that abnormality has occurred in an opening degree control system for the wastegate valve.

Abstract: In a control device for an internal combustion engine, when a target pre/post compressor pressure ratio calculated by a target pre/post compressor pressure ratio calculation part is more than a turbine-limit-time pre/post compressor pressure ratio calculated by a turbine-limit-time pre/post compressor pressure ratio calculation part, an upper limit of the target pre/post compressor pressure ratio is limited by the turbine-limit-time pre/post compressor pressure ratio, and a change rate of the target pre/post compressor pressure ratio is limited by a change rate limit value during a change rate limitation period after upper limit limitation processing starts, thereby preventing the target pre/post compressor pressure ratio from being suddenly fluctuated by a sudden fluctuation in a compressor passage flow rate, and suppressing the occurrence of the over rotation of the turbine and the control hunting.

Abstract: An internal-combustion engine control apparatus is obtained which can accurately perform the control toward an output target value by calculating an exhaust gas temperature more accurately, and eliminating discrepancies of a turbine flow-rate and a waste-gate-valve opening-degree. In the apparatus, a thermal efficiency calculation unit calculates thermal efficiency based on a combination in any of ignition timing, charging efficiency, an air-fuel ratio and an exhaust gas recirculation (EGR) ratio being change factors in thermal efficiency of the internal-combustion engine; an exhaust-gas loss calculation unit calculates exhaust gas loss based on thermal efficiency calculated by the thermal efficiency calculation unit, and on a combination in any of the change factors of the exhaust gas loss; and an exhaust port temperature calculation unit calculates an exhaust gas temperature at an exhaust port portion based on exhaust gas loss calculated by the exhaust-gas loss calculation unit.

Abstract: The present invention provides a controller and a control method for an internal combustion engine, which can suppress the generation of an annoying collision noise and abnormal heating of a motor of an actuator, which are generated by contact of the output shaft of the actuator with an opening side stopper of the actuator. The controller and the control method for the internal combustion engine are configured such that a target opening (Sv) of the valve is set to the smaller of: a required target opening (Sv_dem) computed so that a target supercharging pressure (Sp) and an actual supercharging pressure (Pp) are matched with each other; and a restricted target opening (Sv_lmt) computed based on a fully closed position learning value (Pv_lrn), which corresponds to an actual position detected by a position sensor, when the valve is located in the fully closed position, and on the restricted target position.

Abstract: While an actuator is driven by an actuator driving unit with an operation amount for which the maximum value is limited by an operation amount limitation unit, if a state in which the actual opening degree of a wastegate valve does not coincide with a target opening degree has continued for a predetermined time period, driving by the actuator driving unit is attempted with an operation amount for which the maximum value limitation is relaxed by an operation amount limitation relaxing unit. Even after this, if the state in which the actual opening degree of the wastegate valve does not coincide with the target opening degree still has not been eliminated, an abnormality determination unit determines that abnormality has occurred in an opening degree control system for the wastegate valve.

Abstract: Provided is a control device for an internal combustion engine, which is configured to: acquire an internal combustion engine required opening degree of the waste gate valve based on the operation state of the internal combustion engine. When the internal combustion engine required opening degree is full closing, full closing learning control is carried out by converting the target opening degree of the waste gate valve to a target opening degree for full closing learning so as to bring about a state in which the waste gate valve fully closes the exhaust bypass passage. When a state in which the position of the actuator does not change consequently continues for a set period, it is considered that the fully closed state is brought about and the full closing learning is finished, and a correction amount for the feedback control is decreased.

Abstract: A required opening correction amount is calculated based on a target supercharging pressure and an actual supercharging pressure, a target opening is calculated based on a required opening and the required opening correction amount, an actual operating position of a wastegate valve is determined to correspond to a fully closed position when the wastegate valve is in a fully closed condition, an actual opening of the wastegate valve is calculated based on the fully closed position and the actual operating position, an operation amount of an actuator for aligning the target opening with the actual opening is calculated based on the target opening and the actual opening, and when the target opening corresponds to the fully closed condition and the actual operating position is not decreased at or above a prescribed rate, the fully closed position is updated to the actual operating position.

Abstract: In a control system for an internal combustion engine, the waste gate actuator controls the opening and closing of a waste gate valve according to operation amount controlled by the control device, an actual position of the waste gate actuator detected by the position sensor for detecting the position of the waste gate actuator which correlates to the actual open position of a waste gate valve is inputted to the control device, the control device performs control for limiting the operation amount to stop to predetermined opening deviation in the direction toward open side from open side stopper position of the waste gate.

Abstract: In a control device for an internal combustion engine, when a target pre/post compressor pressure ratio calculated by a target pre/post compressor pressure ratio calculation part is more than a turbine-limit-time pre/post compressor pressure ratio calculated by a turbine-limit-time pre/post compressor pressure ratio calculation part, an upper limit of the target pre/post compressor pressure ratio is limited by the turbine-limit-time pre/post compressor pressure ratio, and a change rate of the target pre/post compressor pressure ratio is limited by a change rate limit value during a change rate limitation period after upper limit limitation processing starts, thereby preventing the target pre/post compressor pressure ratio from being suddenly fluctuated by a sudden fluctuation in a compressor passage flow rate, and suppressing the occurrence of the over rotation of the turbine and the control hunting.

Abstract: An internal-combustion engine control apparatus is obtained which can accurately perform the control toward an output target value by calculating an exhaust gas temperature more accurately, and eliminating discrepancies of a turbine flow-rate and a waste-gate-valve opening-degree. In the apparatus, a thermal efficiency calculation unit calculates thermal efficiency based on a combination in any of ignition timing, charging efficiency, an air-fuel ratio and an exhaust gas recirculation (EGR) ratio being change factors in thermal efficiency of the internal-combustion engine; an exhaust-gas loss calculation unit calculates exhaust gas loss based on thermal efficiency calculated by the thermal efficiency calculation unit, and on a combination in any of the change factors of the exhaust gas loss; and an exhaust port temperature calculation unit calculates an exhaust gas temperature at an exhaust port portion based on exhaust gas loss calculated by the exhaust-gas loss calculation unit.

Abstract: To provide controller and control method for internal combustion engine that can suppress motor built in actuator from overheating when waste gate valve is controlled to near fully closed position or fully opened position, and can suppress from causing deterioration of fuel efficiency by consuming large power wastefully even in light load operation region in which pressure of exhaust gas is low relatively. A controller for internal combustion engine calculates basic operating amount for bringing real opening degree close to target opening degree; calculates an operating amount obtained by performing upper limitation of basic operating amount by first limit value, as final operating amount, in case of supercharging driving state; and calculates an operating amount obtained by performing upper limitation of basic operating amount by second limit value smaller than first limit value, as final operating amount, in case of non-supercharging driving state.

Abstract: 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.

Abstract: A controller is provided, which detects operating conditions of an internal combustion engine on the basis of detection results from a group of sensors and drives an actuator that modifies an opening position of a wastegate valve on the basis of the operating conditions. When driving the wastegate valve to a fully closed opening, the controller initially drives the actuator toward a preset provisional fully closed position, and after determining on the basis of a detection result from a position sensor that an actual opening of the wastegate valve has reached the provisional fully closed opening, switches a target opening to the fully closed opening and drives the actuator accordingly.

Abstract: Provided is a control device for an internal combustion engine, which is configured to: input an operation state of the internal combustion engine and a position of an actuator configured to change an opening degree of a waste gate valve provided in an exhaust bypass passage of the internal combustion engine; acquire an internal combustion engine required opening degree of the waste gate valve based on the operation state of the internal combustion engine; and apply feedback control to the actuator so that the internal combustion engine required opening degree is attained. When the internal combustion engine required opening degree is full closing, full closing learning control is carried out by converting the target opening degree of the waste gate valve to a target opening degree for full closing learning so as to bring about a state in which the waste gate valve fully closes the exhaust bypass passage.

Abstract: A controller, for a supercharger-equipped internal combustion engine, that can improve the feedback response of compressor driving force is provided. In a controller, inertial force produced by an inertial moment of a supercharger is calculated, based on a real rotation speed of the supercharger; then, driving force feedback control is implemented in which a gate valve control value, which is a control value for a gate valve actuator, is changed so that an addition value obtained by adding the inertial force to the real compressor driving force approaches a target compressor driving force.

Abstract: The present invention provides a controller and a control method for an internal combustion engine, which can suppress the generation of an annoying collision noise and abnormal heating of a motor of an actuator, which are generated by contact of the output shaft of the actuator with an opening side stopper of the actuator. The controller and the control method for the internal combustion engine are configured such that a target opening (Sv) of the valve is set to the smaller of: a required target opening (Sv_dem) computed so that a target supercharging pressure (Sp) and an actual supercharging pressure (Pp) are matched with each other; and a restricted target opening (Sv_lmt) computed based on a fully closed position learning value (Pv_lrn), which corresponds to an actual position detected by a position sensor, when the valve is located in the fully closed position, and on the restricted target position.

Abstract: Provided are a conductive composition for thin film printing and a method for forming a thin film conductive pattern, which can easily performing thin film printing, and can capable of improve conductivity by thermal sintering at a comparatively low temperature of 300° C. or less or by photo irradiation. A conductive composition comprises metal particles, a binder resin, and a solvent, the content of an organic compound in the solvent being 5 to 98% by mass, the organic compound comprising a hydrocarbon group having a bridged cyclic structure and a hydroxyl group, the content of metal particles being 15 to 60% by mass, the metal particles containing 20% by mass or more of flat metal particles, the content of the binder resin being 0.5 to 10 parts by mass relative to 100 parts by mass of the metal particles, and the viscosity at 25° C. being 1.0×103 to 2×105 mPa·s.

Abstract: In a control system for an internal combustion engine, the waste gate actuator controls the opening and closing of a waste gate valve according to operation amount controlled by the control device, an actual position of the waste gate actuator detected by the position sensor for detecting the position of the waste gate actuator which correlates to the actual open position of a waste gate valve is inputted to the control device, the control device performs control for limiting the operation amount to stop to predetermined opening deviation in the direction toward open side from open side stopper position of the waste gate.

Abstract: A controller is provided, which detects operating conditions of an internal combustion engine on the basis of detection results from a group of sensors and drives an actuator that modifies an opening position of a wastegate valve on the basis of the operating conditions. When driving the wastegate valve to a fully closed opening, the controller initially drives the actuator toward a preset provisional fully closed position, and after determining on the basis of a detection result from a position sensor that an actual opening of the wastegate valve has reached the provisional fully closed opening, switches a target opening to the fully closed opening and drives the actuator accordingly.