Abstract: [Problem] To provide a reducing agent injection valve abnormality detection unit capable of precisely determining whether or not a reducing agent injection valve is abnormally stuck, and a reducing agent supply apparatus.

Abstract: A drive control method of a flow rate control valve in a common rail type fuel injection control apparatus, in which an integral value of a difference between a target current and an actual current is used in feedback control of an energization current of the flow rate control valve such that the actual current of the flow rate control valve becomes closer to the target current, the flow rate control valve controlling an amount of fuel supplied to a high pressure pump that pressure feeds high pressure fuel to a common rail.

Abstract: A fuel supply apparatus of an internal combustion engine is provided which can discharge air bubbles or air from within fuel supply paths while increasing pressure within a common rail up to a predetermined pressure level before a start of the internal combustion engine, can reduce a period of time of cranking from when an ignition switch is switched on and which can reduce noise that occurs when the air bubbles or air are being discharged. The fuel supply apparatus is provided with a flow rate control valve that adjusts a flow rate of fuel supplied to the common rail and a pressure control valve that reduces the pressure within the common rail.

Abstract: An occupant protection apparatus can reduce the impact on an occupant as much as possible to securely protect the occupant even when a first-stage ignition means is in failed state. In igniting a first squib 3a for driver seat, if determined that the first squib 3a for driver seat has been diagnosed to be in failed state (S204), a second squib 3b for driver seat in place of the first squib 3a for driver seat is ignited at the time when the first squib 3a for driver seat is normally scheduled to be ignited (S400), then the first squib 3a for driver seat is ignited at the time when the second squib 3b for driver seat is normally scheduled to be ignited (S600), which enables explosion of a driver airbag apparatus 3 without a delay as much as possible to improve the assurance and reliability of occupant protection.

Abstract: [Problem] To provide a reducing agent supply apparatus that can quickly melt urea aqueous solution solidified in a reducing agent injection valve to allow early start of the injection control of urea aqueous solution, a method for controlling the reducing agent supply apparatus, and an exhaust gas purification apparatus.

Abstract: There is provided a vehicle brake device that includes hydraulic brake means for generating a hydraulic brake force and regenerative brake means for generating a regenerative brake force and distributes the hydraulic brake force and the regenerative brake force for a driver-requested brake force. The hydraulic brake means includes a pressure reducing valve that reduces hydraulic pressure of wheel cylinders. The vehicle brake device includes hydraulic brake control means for maintaining the pressure reducing valve open while the driver-requested brake force is covered by only the regenerative brake force. The hydraulic brake control means does not open the pressure reducing valve when hydraulic pressure is present in the wheel cylinders.

Abstract: A method of pilot injection control which avoids a change in the number of pilot injections in a transient response of an engine to improve driving and handling feeling. When pilot injection is performed, it is determined whether fuel injection amount Q immediately before the pilot injection is more than a maximum value Qmax and, if so, number of pilot injections is fixed to a predetermined value. When fuel injection amount Q is determined to be not more than the maximum value Qmax, it is determined whether fuel injection amount Q is lower than a minimum value Qmin, and, if so, the number-fixed control of the pilot injections is released and map control is started where the pilot injection number is determined based on a map.

Abstract: An object of the invention is to prevent abnormal noise from being generated when the pressure of brake fluid supplied to a brake caliper is reduced. A vehicle brake device includes first and second hydraulic brakes generating a. hydraulic brake force and a regenerative brake generating a regenerative brake force and divides a braking force into the hydraulic brake force and the regenerative brake force. The vehicle brake device includes a regulating valve that is provided between the first and second hydraulic brakes and continuously regulates the flow rate of brake fluid flowing to the second hydraulic brake from the first hydraulic brake, and a pressure reducing valve that reduces the pressure of the brake fluid supplied to the second hydraulic brake, An opening of the regulating valve is continuously increased and the pressure reducing valve is opened, when the hydraulic brake force of the first hydraulic brake is reduced.

Abstract: A reductant supply device having a reductant injection valve with an injection tip that is fixed to an exhaust pipe on the exhaust gas upstream side of a reduction catalyst, the device directly injecting and supplying an urea aqueous solution which is pressure-fed to the reductant injection valve in a state of a liquid fluid, by controlling opening and closing of the reductant injection valve. The device includes a cooling water circulation passage; a flow rate control valve; a temperature sensor for detecting a temperature at the tip of the reductant injection valve; and a controller for controlling the flow rate control valve based on the temperature at the tip such that the temperature at the tip of the reductant injection valve is maintained at a temperature between equal to or higher than a boiling point of the urea aqueous solution and equal to or lower than 130° C.

Abstract: An oxidation catalyst fault diagnosis unit and fault diagnosis method. An oxidation catalyst fault diagnosis unit which performs fault diagnosis of an oxidation catalyst placed on the downstream side of the reduction catalyst, the oxidation catalyst fault diagnosis being equipped with a reducing agent dosage calculating portion that sets a dosage of the reducing agent such that a predetermined quantity of the ammonia flows out to the downstream side of the reduction catalyst, an oxidation efficiency calculating portion that obtains the efficiency with which the predetermined quantity of ammonia flowing out to the downstream side of the reduction catalyst is oxidized by the oxidation catalyst when the predetermined quantity of ammonia passes through the oxidation catalyst, and a fault determining portion that performs determination of whether or not the oxidation catalyst is faulty by comparing the oxidation efficiency with a predetermined reference value.

Abstract: A stud bolt (1) is disposed with a bolt head portion (2), a bolt shoulder portion (3) whose diameter is smaller than the diameter of the bolt head portion (2), and a thread portion (4b) whose diameter is smaller than the diameter of the bolt shoulder portion (3), wherein the bolt shoulder portion (3) includes a knurling portion (3b) that includes projecting portions (3b1) and groove portions (3b2) on its outer periphery and at least part of which eats into a container (10) during staking and a bolt base portion (3a) that is disposed between the knurling portion (3b) and the bolt head portion (2) and has a peripheral surface that is smoother than the knurling portion (3b).

Abstract: A control device and method for exhaust gas purification that can prevent the adsorption amount from becoming excessively lower than the saturated adsorption amount and can prevent the reduction efficiency of the reduction catalyst from degrading, including a device which can predict a transition of the temperature of the reduction catalyst and determine whether that temperature is decreasing; an apparatus which can control injection of the reducing agent according to a first amount that is smaller than a saturated amount corresponding to the temperature of the catalyst if it is determined that the temperature does not decrease continuously for a time; and a second apparatus which can control the injection of the reducing agent according to a second amount that is larger than the first amount and smaller than the saturated amount if it is determined that the temperature of the reduction catalyst continuously decreases for a time.

Abstract: A plate plunger 17 that determines a servo ratio SR of a vacuum booster 1 pertaining to the present invention has, on a corner portion between its outer peripheral surface and its surface that opposes a reaction disc 16, a servo ratio determination surface 17c that is formed by an inclined surface and determines the servo ratio. The servo ratio determination surface 17c comprises a reaction disc contact surface 17f that determines the servo ratio and a reaction disc non-contact surface 17g. Additionally, a variety of different servo ratios are obtained by performing secondary processing such as cutting or grinding on just the servo ratio determination surface 170 to change the outer peripheral diameter of the reaction disc contact surface 17f.

Abstract: A projection (21b4) provided at a tip portion of an inner lip portion (21b) of a first cup seal (21) comes in contact with a second side wall (20c) of a recessed portion (20) and a large axial force is exerted in the axial direction on a first tapered inner peripheral surface (21b1) of the first cup seal (21) from a rear side tapered surface (4b2) of a primary piston (4). This makes it possible to reliably hold the first cup seal (21) in the axial direction by utilizing the axial force. Therefore, the first cup seal (21) can be suppressed from moving in the axial direction. In particular, the projection (21b4) of the first cup seal (21) comes in contact with a tapered surface (20c?) of the second side wall (20c) to obtain a further increased axial force, and the first cup seal (21) can be held more reliably.

Abstract: It is possible to perform a failure diagnosis of a pressure sensor with a simple structure without installing a dedicated circuit for the failure diagnosis. In a common rail type fuel injection control apparatus, a pressure control valve 12 is provided in a fuel return path from a common rail 1, and a rail pressure detected by a pressure sensor 11 can be controlled to match a target rail pressure through drive control of the pressure control valve 12 by an electronic control unit 4. The target rail pressure is calculated based on operational information of an engine 3. In the common rail type fuel injection control apparatus, learning processing is performed, in which a correction coefficient Cv is stored and updated as a learning value to correct energization characteristics of a median product of the pressure control valves 12 that are stored in the electronic control unit 4. At the same time, it is determined whether the learning value of the correction coefficient Cv is within a predetermined range.

Abstract: Disclosed is a common rail fuel injection control apparatus that is used in an engine that drives power equipment, an actual measurement temperature difference that is a difference between a pre-pressurization temperature of the fuel and a post-pressurization release temperature of the fuel is obtained, and it is determined that a pressure sensor is failed when an absolute value of a difference between a representative temperature difference set in advance as a difference between the pre-pressurization temperature of the fuel and the post-pressurization release temperature of the fuel, and the actual measurement temperature difference exceeds a predetermined threshold value.

Abstract: A reducing agent injection device is equipped with a storage tank that houses a reducing agent, a pump that pressure-feeds the reducing agent, a reducing agent injection valve that injects the reducing agent pressure-fed by the pump into the inside of an exhaust pipe of an internal combustion engine, a supply path that interconnects the pump and the reducing agent injection valve, and a pressure sensor that is disposed in the supply path. The reducing agent injection device is configured such that it can suck, into the inside of the supply path, a gas inside the exhaust pipe via an injection hole in the reducing agent injection valve by subjecting the inside of the supply path to depressurization processing. An abnormality detection device detects clogging of the reducing agent injection valve in the reducing agent injection device and includes a clogging determination component.

Abstract: A system for simulating brake feel for a vehicle braking installation comprising a hydraulic braking system (7, 8) and an electric braking system (9). This system comprises a first chamber (20) containing a force transmitting fluid (21) and in which there slides a hydraulic piston (22) under the control of a manual braking operating member (1), the first chamber (20) communicating with a second, secondary simulation chamber (4) via a simulation valve (3), the degree of opening of which allows a force to be simulated at the brake pedal.

Abstract: The invention provides an exhaust gas purification apparatus for an internal combustion engine which evenly diffuses a reducing agent over an entirety of the exhaust gas which flows into an NOx catalyst disposed on the downstream side of thereof. The exhaust gas purification apparatus includes an NOx catalyst disposed in an exhaust gas passage of an internal combustion engine, and a reducing agent injecting unit for injecting the reducing agent into the exhaust gas passage which is on an upstream side of the NOx catalyst. A narrowed portion, in which a cross-sectional area of a flow passage is smaller than a cross-sectional area of the exhaust gas passage and of the NOx catalyst, is provided on a downstream side of an injecting position by the reducing agent injecting unit and the upstream side of the NOx catalyst, and a reducing agent diffusing device is provided on the narrowed portion.

Abstract: A trouble diagnosis device and method for an NOx sensor for determining abnormality of an NOx sensor used in an exhaust gas purification system. The device can perform a trouble diagnosis without forcedly creating a diagnosis mode during operation of an internal combustion engine and without deterioration of drivability or fuel consumption. The device detects the time-lapse variation of the exhaust NOx flow rate suitable for diagnosis in a normal operation mode and determines whether the NOx sensor responds with following this variation.