Abstract: A vehicle includes an internal combustion engine, an exhaust purification catalyst, and an air fuel ratio sensor. The internal combustion engine is structured to be motored by an electric motor generator. The exhaust purification catalyst is structured to purify exhaust gas of the internal combustion engine. The air fuel ratio sensor is located upstream of the exhaust purification catalyst and structured to sense an air fuel ratio. When a quantity of oxygen stored in the exhaust purification catalyst is larger than a reference value, it is determined that inflow of oxygen into the exhaust purification catalyst has an insignificant effect on exhaust performance. Then, fuel injection of the internal combustion engine is stopped, the internal combustion engine is motored, and air fuel ratio learning is performed for learning of a sensed value of the air fuel ratio sensor.

Abstract: A hybrid vehicle includes a canister that adsorbs evaporative fuel generated in the fuel tank for an internal combustion engine. The hybrid vehicle can drive a drive wheel even when the internal combustion engine is stopped. When the internal combustion engine of the hybrid vehicle is stopped and a prescribed set of conditions is satisfied, the internal combustion engine is rotated by the generator. When the internal combustion engine of the hybrid vehicle is rotated by the generator, the evaporative fuel adsorbed in the canister is supplied to the upstream side of an upstream side exhaust catalytic converter device. In the hybrid vehicle, the introduced evaporative fuel as reducing agent is adsorbed in the upstream side exhaust catalytic converter device and a downstream side exhaust catalytic converter device.

Abstract: A hybrid vehicle includes a canister that adsorbs evaporative fuel generated in the fuel tank for an internal combustion engine. The hybrid vehicle can drive a drive wheel even when the internal combustion engine is stopped. When the internal combustion engine of the hybrid vehicle is stopped and a prescribed set of conditions is satisfied, the internal combustion engine is rotated by the generator. When the internal combustion engine of the hybrid vehicle is rotated by the generator, the evaporative fuel adsorbed in the canister is supplied to the upstream side of an upstream side exhaust catalytic converter device. In the hybrid vehicle, the introduced evaporative fuel as reducing agent is adsorbed in the upstream side exhaust catalytic converter device and a downstream side exhaust catalytic converter device.

Abstract: An internal combustion engine (1) is provided with a turbocharger (2), and is configured to be switchable between a stoichiometric combustion mode having a theoretical air-fuel ratio as a target air-fuel ratio and a lean combustion mode having a lean air-fuel ratio as a target air-fuel ratio. An air bypass valve (20) is provided in an air bypass passage (19) communicating a collector (11a) on the downstream of a throttle valve (12) with the upstream side of a compressor (2b) in an intake passage (11). At the time of the shifting from the lean combustion mode to the stoichiometric mode, the throttle valve (12) is closed and the air bypass valve (20) is temporarily opened to decrease the pressure inside the collector (11a) quickly.

Abstract: In the present invention, an internal combustion engine (7) drives a generator (6). The internal combustion engine (7) carries out a standby operation. The standby operation is an operation involving assisting power supply to a drive motor (2). During the standby operation of the internal combustion engine (7), the SoC of a battery (4) is equal to or higher than a predetermined SoC threshold. The operating point of the internal combustion engine (7) during the standby operation is further on a lower-output side than the operating point of the same during the charging of the battery (4). The operating point of the internal combustion engine (7) during the standby operation is an operating point in which the collector pressure of the internal combustion engine (7) is equal to or higher than a predetermined collector pressure threshold. The operating point of the internal combustion engine (7) during the standby operation is within a lean combustion region.

Abstract: An internal combustion engine (1) is provided with a turbocharger (2), and is configured to be switchable between a stoichiometric combustion mode having a theoretical air-fuel ratio as a target air-fuel ratio and a lean combustion mode having a lean air-fuel ratio as a target air-fuel ratio. An air bypass valve (20) is provided in an air bypass passage (19) communicating a collector (11a) on the downstream of a throttle valve (12) with the upstream side of a compressor (2b) in an intake passage (11). At the time of the shifting from the lean combustion mode to the stoichiometric mode, the throttle valve (12) is closed and the air bypass valve (20) is temporarily opened to decrease the pressure inside the collector (11a) quickly.

Abstract: An internal combustion engine includes: a turbocharger including a compressor and an exhaust turbine; a wastegate valve for allowing a part of exhaust gas to bypass the exhaust turbine and flow into a downstream side of the exhaust turbine, wherein the exhaust gas is to be brought into the exhaust turbine; and an exhaust adjustment mechanism for adjusting a quantity of the exhaust gas. A control method includes operating a first one of the wastegate valve and the exhaust adjustment mechanism with higher priority to a second one of the wastegate valve and the exhaust adjustment mechanism in response to a condition where an intake air quantity is to be varied along with a variation in engine load or air fuel ratio, wherein operation of the first one allows thermal energy to be recovered more efficiently under the condition than that of the second one.

Abstract: An internal combustion engine includes: a turbocharger including a compressor and an exhaust turbine; a wastegate valve for allowing a part of exhaust gas to bypass the exhaust turbine and flow into a downstream side of the exhaust turbine, wherein the exhaust gas is to be brought into the exhaust turbine; and an exhaust adjustment mechanism for adjusting a quantity of the exhaust gas. A control method includes operating a first one of the wastegate valve and the exhaust adjustment mechanism with higher priority to a second one of the wastegate valve and the exhaust adjustment mechanism in response to a condition where an intake air quantity is to be varied along with a variation in engine load or air fuel ratio, wherein operation of the first one allows thermal energy to be recovered more efficiently under the condition than that of the second one.

Abstract: An internal combustion engine including: a cylinder block in which a plurality of cylinders are formed; and a cylinder head formed in conjunction with the cylinder block into one body to form a plurality of combustion chambers, wherein an upper surface of the cylinder head is divided, along a direction in which the plurality of cylinders are arranged, into first regions that are regions that overlap the combustion chambers as viewed from an axial direction of the cylinders and a second region that is a region located between two of the first regions adjacent to each other, and at least either an intake-side cam journal or an exhaust-side cam journal is disposed in the second region.

Abstract: An internal combustion engine including: a cylinder block in which a plurality of cylinders are formed; and a cylinder head formed in conjunction with the cylinder block into one body to form a plurality of combustion chambers, wherein an upper surface of the cylinder head is divided, along a direction in which the plurality of cylinders are arranged, into first regions that are regions that overlap the combustion chambers as viewed from an axial direction of the cylinders and a second region that is a region located between two of the first regions adjacent to each other, and at least either an intake-side cam journal or an exhaust-side cam journal is disposed in the second region.

Abstract: A torque rod (1) has two elastic bushes (2, 3) to be mounted respectively to a vibration-generating side and a vibration-receiving side, and a connecting rod (4) connecting the two elastic bushes (2, 3). The actively controlled vibration cancellation means (5) is an actuator including: the shaft (5a) having two opposite ends mounted to the connecting rod (4) and extending in an axial direction of the connecting rod (4), the mass member (5b) shaped in a tube to surround the shaft (5a); a coil (5e) and a winding core (5f) fixed to the shaft (5a) in the tube-shaped mass member (5b); a permanent magnet (5d) mounted to an inner peripheral surface of the tube-shaped mass member (5b) or the shaft (5a), and a connecting member (5c) for connecting at least one end of the tube-shaped mass members (5b) to the shaft (5a).

Abstract: A torque rod (1) has two elastic bushes (2, 3) to be mounted respectively to a vibration-generating side and a vibration-receiving side, and a connecting rod (4) connecting the two elastic bushes (2, 3). The actively controlled vibration cancellation means (5) is an actuator including: the shaft (5a) having two opposite ends mounted to the connecting rod (4) and extending in an axial direction of the connecting rod (4), the mass member (5b) shaped in a tube to surround the shaft (5a); a coil (5e) and a winding core (5f) fixed to the shaft (5a) in the tube-shaped mass member (5b); a permanent magnet (5d) mounted to an inner peripheral surface of the tube-shaped mass member (5b) or the shaft (5a), and a connecting member (5c) for connecting at least one end of the tube-shaped mass members (5b) to the shaft (5a).