Abstract: Control circuitry executes an increase correction control for fuel when an internal combustion engine is started. A determination process determines whether warm-up in a cylinder is completed. A direct injection mode injects fuel only from a direct injection valve when it is determined that the warm-up in the cylinder is completed. A reduction process sets an increase correction amount of fuel obtained through the increase correction control when executing the direct injection mode to be less than an increase correction amount obtained prior to the execution of the direct injection mode.

Abstract: A cooling fan device uses a cooling fan coupled to an engine via a fan clutch to generate cooling air flow for a radiator. The cooling fan device includes an electronic control unit configured to control an engagement rate of the fan clutch. The electronic control unit is configured to execute a first calculation process, a second calculation process, and an upper limit guarding process, thereby controlling the engagement rate based on a value of a coolant temperature requested engagement rate that has been subjected to an upper limit guarding process. A first upper limit rotation speed is set to a lower speed when a vehicle speed is relatively low than when the vehicle speed is relatively high.

Abstract: A cooling fan device includes an electronic control unit that controls an engagement rate of a fan clutch. The electronic control unit executes a first calculation process that calculates an air conditioner requested engagement rate, a second calculation process that calculates, as a first guard value, a value of an engagement rate at which a fan rotation speed increases at a specified speed and an upper limit guarding process that sets a value of the air conditioner requested engagement rate to the first guard value when a calculated value of the air conditioner requested engagement rate in the first calculation process exceeds the first guard value. The electronic control unit further controls the engagement rate of the fan clutch based on a value of the air conditioner requested engagement rate after execution of the upper limit guarding process.

Abstract: Control circuitry executes an increase correction control for fuel when an internal combustion engine is started. A determination process determines whether warm-up in a cylinder is completed. A direct injection mode injects fuel only from a direct injection valve when it is determined that the warm-up in the cylinder is completed. A reduction process sets an increase correction amount of fuel obtained through the increase correction control when executing the direct injection mode to be less than an increase correction amount obtained prior to the execution of the direct injection mode.

Abstract: A cooling device for an internal combustion engine is provided. The cooling device includes a first passage connected to the internal combustion engine and circulating a coolant, a second passage connected to the internal combustion engine and circulating the coolant, a heat exchanger provided on the first passage and configured such that heat exchange is performed with respect to the coolant, a first pump provided on the first passage, a second pump provided on the second passage and an electronic control unit controlling the first pump and the second pump. The electronic control unit, when a temperature of the coolant is no lower than a predetermined temperature, drives the first pump such that a flow rate of the coolant in the first passage increases as compared to when the temperature of the coolant is lower than the predetermined temperature, and performs first control of stopping the second pump.

Abstract: A cooling device for an internal combustion engine is provided. The cooling device includes a first passage connected to the internal combustion engine and circulating a coolant, a second passage connected to the internal combustion engine and circulating the coolant, a heat exchanger provided on the first passage and configured such that heat exchange is performed with respect to the coolant, a first pump provided on the first passage, a second pump provided on the second passage and an electronic control unit controlling the first pump and the second pump. The electronic control unit, when a temperature of the coolant is no lower than a predetermined temperature, drives the first pump such that a flow rate of the coolant in the first passage increases as compared to when the temperature of the coolant is lower than the predetermined temperature, and performs first control of stopping the second pump.

Abstract: A controller includes: a control unit configured to calculate a control command value of an opening degree of a solenoid valve to control an opening degree of the solenoid valve; and an acquisition unit configured to acquire an estimated amount and a target amount of a working fluid in a labyrinth chamber, and a rotation speed of a drive shaft. The control unit calculates a final control command value based on a feedback control command value and a feedforward control command value, and controls the solenoid valve, the feedback control command value being calculated based on deviation between the estimated amount and the target amount, the feedforward control command value being used to maintain a rotation speed of a fan constant based on the estimated amount and the rotation speed of the drive shaft.

Abstract: A controller of a fan coupling device includes: an acquisition unit that acquires an acceleration parameter and a deviation parameter; a control unit that controls a regulation mechanism; a prediction unit that predicts that hunting occurs in the rotation speed of the fan, when an operating point of the fan expressed with the deviation parameter and the acceleration parameter belongs to a predicted region; and a restraining unit that executes, when the hunting is predicted to occur, a hunting restraining process of executing at least one of lowering an integral gain of a feedback control to be lower than when the hunting is not predicted to occur and increasing a derivative gain of the feedback control to be higher than when the hunting is not predicted to occur.

Abstract: A controller includes: an acquisition unit that acquires a deviation between an estimated amount and a target amount of a working fluid in the labyrinth chamber, and a fluid amount parameter corresponding to the estimated amount; and a control unit that executes feedback control including at least integral control of the deviation so as to control a regulation mechanism. When the fluid amount parameter is equal to or greater than a threshold, the control unit executes the feedback control in a state where the integral control is stopped.

Abstract: A controller includes: a control unit configured to calculate a control command value of an opening degree of a solenoid valve to control an opening degree of the solenoid valve; and an acquisition unit configured to acquire an estimated amount and a target amount of a working fluid in a labyrinth chamber, and a rotation speed of a drive shaft. The control unit calculates a final control command value based on a feedback control command value and a feedforward control command value, and controls the solenoid valve, the feedback control command value being calculated based on deviation between the estimated amount and the target amount, the feedforward control command value being used to maintain a rotation speed of a fan constant based on the estimated amount and the rotation speed of the drive shaft.

Abstract: A controller of a fan coupling device includes: an acquisition unit that acquires an acceleration parameter and a deviation parameter; a control unit that controls a regulation mechanism; a prediction unit that predicts that hunting occurs in the rotation speed of the fan, when an operating point of the fan expressed with the deviation parameter and the acceleration parameter belongs to a predicted region; and a restraining unit that executes, when the hunting is predicted to occur, a hunting restraining process of executing at least one of lowering an integral gain of a feedback control to be lower than when the hunting is not predicted to occur and increasing a derivative gain of the feedback control to be higher than when the hunting is not predicted to occur.

Abstract: A controller includes: an acquisition unit that acquires a deviation between an estimated amount and a target amount of a working fluid in the labyrinth chamber, and a fluid amount parameter corresponding to the estimated amount; and a control unit that executes feedback control including at least integral control of the deviation so as to control a regulation mechanism. When the fluid amount parameter is equal to or greater than a threshold, the control unit executes the feedback control in a state where the integral control is stopped.

Abstract: Provided are an assistance device, an assistance garment, and an assistance method that enable easy replacement of a part of structure, suppression of fatigue of a wearer, and reduction of a load in an action of the wearer, without requiring time and effort for putting on and taking off. An assistance device 1 is provided on a garment and reduces a load in an action of a wearer 5. The assistance device 1 is provided with an assisting part 10 that is replaceable and applies force for assisting the an action to the body of the wearer 5 by changing flexibility, and an assist-control part 12 that controls the flexibility.

Abstract: Provided are an assistance device, an assistance garment, and an assistance method that enable easy replacement of a part of structure, suppression of fatigue of a wearer, and reduction of a load in an action of the wearer, without requiring time and effort for putting on and taking off. An assistance device 1 is art assistance device 1 that is provided on a garment and reduces a load in an action of a wearer 5. The assistance device 1 is provided with an assisting part 10 that is replaceable and applies force for assisting the an action to the body of the wearer 5 by changing flexibility, and an assist-control part 12 that controls the flexibility.

Abstract: An engine includes a variable valve mechanism capable of holding a valve timing of an intake valve in an intermediate phase when the engine is started. An ECU calculates a degree of deposit adhesion in a combustion chamber, and calculates a deposit correction amount that is a retard correction amount for an ignition timing set in accordance with the calculated degree of the deposit adhesion. The ECU calculates a first correction amount that is a first adaptive value for the retard correction amount for the ignition timing in a reference phase of the valve timing and a second correction amount that is a second adaptive value for the retard correction amount for the ignition timing in an adaptation phase of the valve timing. The deposit correction amount is set based on the first correction amount and the second correction amount.

Abstract: The present invention relates to a LED array head which includes a base plate, and an array of protruding LED light-emitting portions formed on the base plate. Further, a mirror array including reflection mirror structures is formed on an upper circumferential surface of corresponding LED light-emitting portions, thereby narrowing a radiation angle of light emitted by the corresponding light-emitting portions. In addition, the reflection mirror structures have a circular cone frustum shape with a diameter at an upper emission side larger than a diameter at a lower emission side. The present invention also relates to a minute reflection optical elements array of an optical writing apparatus having an array of light-emitting elements formed on a base plate of an LED array head. The optical elements array includes opening portions having a tapering cross-section shape which becomes narrower in a direction toward the base plate at sides opposing corresponding light-emitting elements.

Abstract: A high-frequency switch includes a substrate, external conductors provided on the substrate, and a central conductor provided on the substrate, the external conductors and the central conductor constituting a coplanar high-frequency wave line on the substrate. A deflectable air-bridge is held on the external conductors via an air gap and extends out over the central conductor, the air-bridge being deflectable by an electrostatic field created by an actuation voltage applied between the wave line and the air-bridge. A control-signal conductor generates the actuation voltage between the wave line and the air-bridge. The central conductor acts as the control-signal conductor which generates the actuation voltage between the wave line and the air-bridge. The air-bridge contains a plurality of laminated thin films, the laminated thin films having variable internal stresses that are adjustable to match a particular actuation voltage selected for the switch.

Abstract: An infrared-type intrusion detector for monitoring the presence of a person is disclosed. The detector has a plurality of concave reflector segments for defining separate fields of view. Infrared radiation emanating from the person in any of the fields of view is collected and focused upon a single sensing element to produce a cautionary signal representative of such detection. Plane mirrors are introduced in an optical reflection system of the detector to reflect the radiation from the reflector segments upon the sensing element, such as to reduce the spacing or dimension required for the optical system along the optical axis of the sensing element, whereby the detector is allowed to be made compact in size.