Abstract: A controller 1 includes a calculation unit 10 that receives the current sensor value A1 of the vehicle and calculates an injection amount based on the current sensor value A1 and a target value of the ammonia adsorption amount of the selective reduction catalyst 105 so that the ammonia adsorption amount approaches the target value, and a prediction unit 20 that receives the current sensor value B1 and calculates a corrected target value by future prediction based on the current sensor value B1. The calculation unit 10 calculates the injection amount based on the corrected target value calculated by the prediction unit 20.

Abstract: A controller 1 includes a calculation unit 10 that receives the current sensor value A1 of the vehicle and calculates an injection amount based on the current sensor value A1 and a target value of the ammonia adsorption amount of the selective reduction catalyst 105 so that the ammonia adsorption amount approaches the target value, and a prediction unit 20 that receives the current sensor value B1 and calculates a corrected target value by future prediction based on the current sensor value B1. The calculation unit 10 calculates the injection amount based on the corrected target value calculated by the prediction unit 20.

Abstract: An unhooking prevention structure for a spare tire carrier includes a carrier main body portion for holding a spare tire below a floor plate of an automobile; a bolt including a head portion and a shaft portion passed through the floor plate leaving the head portion on the floor plate, and the shaft portion including a male screw below the floor plate; a hook hooked onto the carrier main body portion and including a female screw screwed into the male screw of the bolt to lift the carrier main body portion by rotating the bolt around an axis; and a rotation restriction mechanism including a fitting cap attached to the head portion of the bolt so as not to rotate around the axis relative to the bolt, and preventing the hook from disengaging the bolt by prohibiting the fitting cap from rotating at a predetermined angle or more.

Abstract: An absolute value of a deviation of an actual EGR ratio, calculated in a current operational status of an engine 1, from a target EGR ratio set on the basis of current operational status of the engine 1 is acquired and is multiplied by a quotient, as gain, acquired from division of a feedback correction amount of opening degree of an EGR valve 12 by an upper limit of the feedback correction amount to determine normality when an acquired product is close to “0” and determine higher degree of abnormality the further the product is away from “0”.

Abstract: An unhooking prevention structure for a spare tire carrier includes a carrier main body portion for holding a spare tire below a floor plate of an automobile; a bolt including a head portion and a shaft portion passed through the floor plate leaving the head portion on the floor plate, and the shaft portion including a male screw below the floor plate; a hook hooked onto the carrier main body portion and including a female screw screwed into the male screw of the bolt to lift the carrier main body portion by rotating the bolt around an axis; and a rotation restriction mechanism including a fitting cap attached to the head portion of the bolt so as not to rotate around the axis relative to the bolt, and preventing the hook from disengaging the bolt by prohibiting the fitting cap from rotating at a predetermined angle or more.

Abstract: Disclosed is a method for detecting abnormality in a reducing agent 17 replenished to a reducing agent tank 14 in an exhaust emission control device for reduction and removal of NOx through addition of the reducing agent 17 from the tank 14 to a selective reduction catalyst 10 incorporated in an exhaust pipe 9. Presence or absence of NH3 slip is determined when a lowering of NOx removal rate is detected. When the presence of the NH3 slip is detected, it is determined that the selective reduction catalyst 10 is deteriorated; when the absence of the NH3 slip is determined, it is determined that a dilute reducing agent or/and a material other than the reducing agent are replenished into the tank.

Abstract: Provided is a method of diagnosing regeneration failure of an exhaust emission control device including filter regenerating means for forcibly heating a particulate filter 13 so as to burn off captured particulates. An exhaust flow rate to the particulate filter 13 and a differential pressure between entry and exit sides of the particulate filter 13 are obtained to calculate a gradient of change in the differential pressure relative to change in the exhaust flow rate. The calculated gradient is compared with a predetermined reference gradient to diagnose the particulate filter 13 as having regeneration failure when the calculated gradient exceeds the reference gradient.

Abstract: An engine intake system is provided with a controller for calculating an idling intake air quantity on the basis of an air flow rate measured by an airflow meter and determining disconnection of a blow-by gas return tube in a case where a value obtained by subtracting the idling intake air quantity from a stored normal intake air quantity exceeds a threshold.

Abstract: An absolute value of a deviation of an actual EGR ratio, calculated in a current operational status of an engine 1, from a target EGR ratio set on the basis of current operational status of the engine 1 is acquired and is multiplied by a quotient, as gain, acquired from division of a feedback correction amount of opening degree of an EGR valve 12 by an upper limit of the feedback correction amount to determine normality when an acquired product is close to “0” and determine higher degree of abnormality the further the product is away from “0”.

Abstract: Disclosed is a method for detecting abnormality in a reducing agent replenished into a reducing agent tank in an exhaust emission control device for reduction and removal of NOx through addition of the reducing agent from the tank to a selective reduction catalyst incorporated in an exhaust pipe. Replenishment of the reducing agent to the tank is detected to wait elapse of a removal-rate stabilization period, i.e., a period from the detected replenishment to stabilization of the NOx removal rate. It is determined that a dilute reducing agent or/and a different material are replenished into the tank if an abnormal lowering of a measured NOx removal rate is detected during a determination period after the removal-rate stabilization period.

Abstract: A controller is constructed such that fuel addition by a fuel injection device is automatically conducted when a predetermined time has passed with a diesel engine being in an idling state, and without a regeneration button being manually operated under a condition of a particulate deposition amount being estimated by the controller on the basis of a pressure signal from a pressure sensor to be within a manual regeneration range over said automatic regeneration range.

Abstract: An engine intake system is provided with a controller 12 for calculating an idling intake air quantity on the basis of an air flow rate 6a measured by an airflow meter 6 and determining disconnection of a blow-by gas return tube 9 in a case where a value obtained by subtracting the idling intake air quantity from a stored normal intake air quantity exceeds a threshold.

Abstract: Disclosed is a method for detecting abnormality in a reducing agent 17 replenished to a reducing agent tank 14 in an exhaust emission control device for reduction and removal of NOx through addition of the reducing agent 17 from the tank 14 to a selective reduction catalyst 10 incorporated in an exhaust pipe 9. Presence or absence of NH3 slip is determined when a lowering of NOx removal rate is detected. When the presence of the NH3 slip is detected, it is determined that the selective reduction catalyst 10 is deteriorated; when the absence of the NH3 slip is determined, it is determined that a dilute reducing agent or/and a material other than the reducing agent are replenished into the tank.

Abstract: Disclosed is a method for detecting abnormality in a reducing agent 17 replenished into a reducing agent tank 14 in an exhaust emission control device for reduction and removal of NOx through addition of the reducing agent 17 from the tank to a selective reduction catalyst incorporated in an exhaust pipe 9. Replenishment of the reducing agent to the tank 14 is detected to wait elapse of a removal-rate stabilization period, i.e., a period from the detected replenishment to stabilization of the NOx removal rate. It is determined that a dilute reducing agent 17 or/and a different material are replenished into the tank 14 if an abnormal lowering of a measured NOx removal rate is detected during a determination period after the removal-rate stabilization period.

Abstract: Provided is a method of diagnosing regeneration failure of an exhaust emission control device including filter regenerating means for forcibly heating a particulate filter 13 so as to burn off captured particulates. An exhaust flow rate to the particulate filter 13 and a differential pressure between entry and exit sides of the particulate filter 13 are obtained to calculate a gradient of change in the differential pressure relative to change in the exhaust flow rate. The calculated gradient is compared with a predetermined reference gradient to diagnose the particulate filter 13 as having regeneration failure when the calculated gradient exceeds the reference gradient.

Abstract: The invention has its object to automatically conduct forced regeneration of a particulate filter 6 even if a driver forgets to conduct a manual operation under operation conditions met for the manual operation. A controller 9 (deposition amount estimating means) is constructed such that fuel addition by a fuel injection device 10 (fuel addition means) is automatically conducted when a predetermined time has passed with the diesel engine 1 being in idling state and without a regeneration button 15 (operation means) being manually operated under condition of a particulate deposition amount being estimated by the controller 9 on the basis of a pressure signal 8a from a pressure sensor 8 (deposition amount estimating means) to be within a manual regeneration range over an automatic regeneration range.

Abstract: Provided is an exhaust emission control device which makes it possible to arbitrarily effect forcible regeneration of a particulate filter by a driver's will. A catalytic regenerative particulate filter 6 is incorporated in an exhaust pipe 4 through which exhaust gas 3 flows. Provided are control and fuel injection devices 12 and 13 for forcibly burning off particulates captured by the particulate filter to regenerate the particulate filter 6 as well as a regeneration button 17 in a driver's cabin for arbitrarily actuating the devices.