For example, during an acceleration transient period of time during which a demand load is raised, a supercharging pressure is raised before a mechanical compression ratio is lowered and an internal combustion engine falls in a high load state. At this time, there is a possibility that a generation of knocking and an excessive rise in a cylinder inner pressure occur. This possibility is a task to be solved. The internal combustion engine includes: a variable compression ratio mechanism which is capable of modifying the mechanical compression ratio; a turbo charger (2) which supercharges intake air utilizing an exhaust energy; and an exhaust bypass valve (7) which adjusts a supercharging pressure as a supercharging pressure adjustment mechanism. The mechanical compression ratio is detected by a control shaft sensor (34) and the supercharging pressure is limited on a basis of this mechanical compression ratio.

Provided is a thermal flow meter through which a measurement with high accuracy and has a discharge function. In a thermal flow meter 300 of the invention, a part of a measurement target gas 30 flowing through the main passage 124 flows into a bypass passage. A drainage passage 3528 is provided in the bypass passage to communicate a bypass passage 4232 on the inlet port (between the inlet port 350 and the measurement surface 430 serving as the air flow sensing portion) and a bypass passage 4234 on the outlet port (between the measurement surface 430 serving as the air flow sensing portion and the outlet port 352). The drainage passage 3528 includes a through hole 3512. The through hole 3512 includes an inlet port 3542 which penetrates a wall surface 4212 forming the bypass passage 4232 on the inlet port and is opened in the bypass passage 4232 on the inlet port, and an outlet port 3544 which is opened in a rear surface 4213 of the wall surface. Water 3552 flowing into the bypass passage is guided to the through hole 3512, and guided to the bypass passage 4234 on the outlet port through the drainage passage 3528, and discharged to the main passage 124. Therefore, an influence of the water flowing into a measuring portion can be reduced, and the measurement accuracy can be improved.

For example, during an acceleration transient period of time during which a demand load is raised, a supercharging pressure is raised before a mechanical compression ratio is lowered and an internal combustion engine falls in a high load state. At this time, there is a possibility that a generation of knocking and an excessive rise in a cylinder inner pressure occur. This possibility is a task to be solved. The internal combustion engine includes: a variable compression ratio mechanism which is capable of modifying the mechanical compression ratio; a turbo charger (2) which supercharges intake air utilizing an exhaust energy; and an exhaust bypass valve (7) which adjusts a supercharging pressure as a supercharging pressure adjustment mechanism. The mechanical compression ratio is detected by a control shaft sensor (34) and the supercharging pressure is limited on a basis of this mechanical compression ratio.

A flow rate control valve in which a valve body can be assembled and removed to a driving source. Where a valve body is assembled to a motor, a moving member is screwed to one end of a rotating shaft, the moving member is inserted into the valve member, the valve member is abutted on a locking portion, the valve member is prevented from coming off from the moving member, the valve member is disposed to an energizing member provided in the body, and the valve body can be assembled to the motor. Where the valve body is removed, the valve member prevented from coming off is pulled out from the body with the moving member, the valve member is removed from the moving member by releasing coming-off prevention of the valve member, further the moving member is removed from the rotating shaft, and the valve body can be removed.

A method and device for processing a signal (CRK) provided by a bidirectional sensor, the method includes the following steps: generation of a first signal (CRK_CNT) utilizing all the slots of the signal provided by the sensor, generation of a second signal (CRK_DIR) utilizing the slots corresponding to a first direction of transit, connection of the first signal (CRK_CNT) to the input of the first electronic component, connection of the second signal (CRK_DIR) to a second component, detection by the second component of edges of the signals received, determination of the direction of transit as a function of the presence or otherwise of an edge on the second signal (CRK_DIR) when a rising and/or falling edge is detected on the first signal, change of the value of the predefined threshold (THMI) in the first component upon each detection of an edge.

An engine includes a turbocharger, an air bypass valve, a wastegate valve, and an EGR apparatus. The engine also includes an ISC passage that connects an upstream side and a downstream side of a throttle valve in an intake passage, and an ISC valve that adjusts an amount of air flowing through the ISC passage. A control apparatus for the engine performs valve opening control to set an opening of an ISC valve at a larger opening than a reference opening when a required torque required by the engine is smaller than an estimated torque that can be generated by the engine, and closes the air bypass valve and the wastegate valve for a fixed period following completion of the valve opening control when an EGR valve of a low pressure EGR apparatus is opened during execution of the valve opening control.

An internal combustion engine of the present invention is an internal combustion engine equipped with port injectors. Further, the internal combustion engine has an ISC passage that connects an upstream side and a downstream side of a throttle valve in an intake passage, and an ISC valve that regulates an amount of air flowing in the ISC passage. A control device of the present invention performs valve opening control that makes an opening degree of the ISC valve an opening degree larger than a reference opening degree when request torque required by the internal combustion engine is smaller than estimated torque that can be generated in the internal combustion engine, and sets a timing for fuel injection from the port injector at an opening timing of an intake valve of a cylinder in which the port injector is installed during the valve opening control.

An internal combustion engine of the present invention is an internal combustion engine including a supercharger and an EGR device. Further, the internal combustion engine has an ISC passage that connects an upstream side and a downstream side of a throttle valve in an intake passage, and an ISC valve that regulates an amount of air that flows in the ISC passage. A control device of the present invention performs valve opening control that makes an opening degree of the ISC valve an opening degree larger than a reference opening degree when request torque required by the internal combustion engine is smaller than estimated torque that can be generated in the internal combustion engine, and prohibits opening of an EGR valve of the EGR device during execution of the valve opening control.

Provided is a boat engine idling revolution number control device, which includes a control unit (30) for performing control so that an engine revolution number converges to a target revolution number based on a result of detection of an engine state. The control unit includes: a decelerating running determining section (314); and a running-load correction calculating function section (315) for calculating a running-load correction signal for correcting a basic torque rate based on the result of determination by the decelerating running determining section and a shift position state detected by the neutral switch. The running-load correction calculating function section resets the running-load correction signal to zero when detecting, based on a behavior of the engine revolution number after the running-load correction, that the engine revolution number is larger than a threshold value calculated based on the target revolution number and the engine revolution number increases.

A flow rate control valve in which a valve body can be assembled and removed to a driving source. Where a valve body is assembled to a motor, a moving member is screwed to one end of a rotating shaft, the moving member is inserted into the valve member, the valve member is abutted on a locking portion, the valve member is prevented from coming off from the moving member, the valve member is disposed to an energizing member provided in the body, and the valve body can be assembled to the motor. Where the valve body is removed, the valve member prevented from coming off is pulled out from the body with the moving member, the valve member is removed from the moving member by releasing coming-off prevention of the valve member, further the moving member is removed from the rotating shaft, and the valve body can be removed.