Abstract: Electricity is suppressed from flowing to a case (4) of an electrically heated catalyst (1).

Abstract: A failure detecting device for a fuel vapor processing system may include a leakage determination device configured to determine leakage of fuel vapor from a target region of the fuel vapor processing system. The leakage determination device may include a canister closed valve provided in an atmospheric passage connected between a canister and an atmosphere. The canister closed valve may switch between an open position and a closed upon receiving a supply of electric power, and may maintain the open position or the closed position when no electric power is received.

Abstract: An exhaust gas purifying device for an internal combustion engine, including: an electrically heated catalyst which has a catalyst carrier supporting a catalyst and a carrier retention unit which is provided on an outer periphery of the catalyst carrier, which retains the catalyst carrier, and which has an electrical insulation property; and a cooling unit which cools the carrier retention unit. Therefore, it is possible to prevent the temperature of the carrier retention unit from becoming high, and it becomes possible to appropriately ensure the insulation property of the electrically heated catalyst. Hence, it becomes possible to expand a condition range in which the current can be applied to the electrically heated catalyst.

Abstract: An internal-combustion engine of the invention includes a catalyst which has an oxidizing ability and is provided in an exhaust passage, wherein an air/fuel ratio of an air/fuel mixture is controlled so that the air/fuel ratio leaner than a theoretical air/fuel ratio and the air/fuel ratio richer than the theoretical air/fuel ratio are alternated with a predetermined amplitude with respect to a target air/fuel ratio. On the assumption that the temperature of the catalyst is referred to as a catalyst temperature, an amplitude set according to the catalyst temperature is adopted as the predetermined amplitude, and the amplitude set when the catalyst temperature is higher than a predetermined temperature is smaller than the amplitude set when the catalyst temperature is lower than the predetermined temperature.

Abstract: A low-pressure-loop EGR apparatus of an engine includes an EGR passage to allow part of exhaust gas discharged from a combustion chamber to return as EGR gas to the combustion chamber, and an EGR valve to regulate a flow of EGR gas in the EGR passage. This passage has an inlet connected to an exhaust passage downstream of a turbine and an outlet connected to an intake passage upstream of a compressor. In the intake passage, an intake bypass passage is provided to connect an upstream portion and a downstream part from the compressor. An ABV is provided in the passage. To remove EGR gas remaining in the ABV, one end of a residual gas removal passage is connected to the intake passage downstream of a throttle valve and the other end of the same passage is connected to the ABV.

Abstract: In an engine provided with a supercharger and a low pressure loop EGR apparatus, an ECU controls an EGR valve to fully close when a detected operating condition is a predetermined operating condition. An outlet of an EGR passage is located at a higher position than an inlet in a vertical direction to allow condensed water to flow downward from downstream to upstream of the EGR valve and flow downward through the EGR passage to an exhaust passage. When the EGR valve has to be controlled to fully close, the ECU forcibly opens the EGR valve when a predetermined discharge condition is established to discharge the condensed water from a downstream side of the EGR valve.

Abstract: A PM amount detecting apparatus having a PM sensor installed in a sensor case into which a part of exhaust gas of an internal combustion engine allowed to flow through an exhaust gas passage is intaken. The sensor case has a structure which lowers a flow rate of the exhaust gas therein to such an extent that PM is capable of performing thermal phoresis, and a structure which generates therein such a temperature difference that PM is guided to the PM sensor in accordance with the thermal phoresis.

Abstract: The electricity is suppressed from flowing through a case (5) of an electric heating catalyst (1).

Abstract: An engine includes a EGR valve to regulate a EGR flow rate. A blow-by gas recirculation passage allows blow-by gas generated in the engine to flow in a surge tank to return to the engine. A PCV valve operates in response to negative pressure to regulate a blow-by gas flow rate in the recirculation passage. During deceleration fuel cutoff of the engine, an ECU holds a throttle valve at a predetermined slight opening degree and controls the EGR valve to be forcibly opened from a valve-closed state to change intake pressure (negative pressure) in the surge tank and determines whether or not the PCV valve is in sticking failure based on changes in intake amount detected by an air flow meter before and after the negative pressure changes.

Abstract: The present invention is intended to suppress a decrease in insulation resistance between electrodes and a case in an electric heating catalyst (EHC). An EHC (1) according to the present invention is provided with a heat generation element (3) that is energized to generate heat thereby to heat a catalyst, a case (4) that receives the heat generation element therein, an insulating member (5) that is arranged between the heat generation element (3) and the case (4) for insulating electricity, electrodes (7) that are connected to the heat generation element (3) through an electrode chamber (9) which is a space located between an inner wall surface of the case (4) and an outer peripheral surface of the heat generation element (3), and a ventilation passage (10) that ventilates the electrode chamber.

Abstract: In an engine with a supercharger, a low pressure loop EGR apparatus includes a EGR passage to allow part of exhaust gas discharged from a combustion chamber of the engine to an exhaust passage to flow as EGR gas in an intake passage to return to the combustion chamber, and a EGR valve to regulate a flow of EGR gas in the EGR passage. The EGR passage has an inlet connected to the exhaust passage downstream of a turbine and an outlet connected to the intake passage upstream of a compressor. An ECU controls the EGR valve while the engine is in a predetermined operating condition, and determines whether or not the EGR valve is failed based on changes in intake amount in the intake passage during control of the EGR valve.

Abstract: The flow of electricity to the case (4) of an electrically heated catalyst (1) is inhibited. The heating element (2), the case (4), and the electrically insulating inner pipe (3) provided between the heating element (2) and the case (4) and inner mats 51 and 52 that are shorter in the direction of the flow of exhaust gases than inner pipe (3) that are provided in a compressed condition between heating element (2) and inner pipe (3), and outer mats 53 and 54 that are shorter in the direction of the flow of exhaust gases than inner pipe (3) that are provided in a compressed condition between inner pipe (3) and case (4) are provided and the load per unit area acting upon inner pipe (3) at the contact surface between inner pipe (3) and outer mats 53 and 54 is larger than the load born per unit area of acting upon the heating element (2) at the contact surface between the inner mats 51 and 52 and heating element (2).

Abstract: The present invention is intended to suppress a decrease in insulation resistance between electrodes and a case in an electric heating catalyst (EHC). An EHC (1) according to the present invention is provided with a heat generation element (3) that is energized to generate heat thereby to heat a catalyst, a case (4) that receives the heat generation element therein, an insulating member (5) that is arranged between the heat generation element (3) and the case (4) for insulating electricity, electrodes (7) that are connected to the heat generation element (3) through an electrode chamber (9) which is a space located between an inner wall surface of the case (4) and an outer peripheral surface of the heat generation element (3), and a ventilation passage (10) that ventilates the electrode chamber.

Abstract: In a control apparatus for an internal combustion engine provided with an electrically heated catalyst which heats a catalyst having an ability to purify an exhaust gas by heat from a heat generation element which generates heat by the supply of electric power, provision is made for a decision unit that decides a restraint amount for energy inputted to the electrically heated catalyst through the exhaust gas so that a heat generation element internal temperature difference, which is a difference in temperature between predetermined portions in the heat generation element of the electrically heated catalyst at the time of cold starting of the internal combustion engine, falls within a predetermined temperature range; and a control unit that controls an operating state of the internal combustion engine according to the restraint amount for the input energy decided by the decision unit.

Abstract: Electricity is suppressed from flowing to a case (4) of an electrically heated catalyst (1).

Abstract: At a time of start of an internal combustion engine, vaporization or atomization of a fuel for initial explosion is promoted, and thereby, discharge of HC can be restrained. The internal combustion engine includes a fuel injection valve which injects a fuel into an intake port, and an exhaust valve which can be stopped in a closed state for each cylinder. When the cylinder before initial explosion is in an exhaust stroke, the exhaust valve of the cylinder is stopped in a closed state. Subsequently, the fuel injection valve of the cylinder in which the exhaust valve is stopped in the closed state in the exhaust stroke is caused to inject the fuel for initial explosion so that an injection time is before opening timing of an intake valve or coincides with the opening timing.

Abstract: A purpose of the present invention is to prevent a PM-caused short circuit between a heating element and a case in an electrically heated catalyst. The electrically heated catalyst is provided in an exhaust gas passage of an internal combustion engine the air-fuel ratio of which is controlled at a ratio near a theoretical air-fuel ratio at an operation time. The electrically heated catalyst includes a heating element that generates heat through electric conduction, a case that stores the heating element therein, and an insulating member sandwiched between the heating element and the case. According to the present invention, the heating element is electrically conducted after the operation of the internal combustion engine is stopped.

Abstract: The present invention has for its subject to avoid a situation that condensed water stays around electrode terminals, in an electric heating type exhaust gas purification apparatus which is arranged in an exhaust system of an internal combustion engine.

Abstract: The present invention is intended to provide a technique which is capable of contributing to the suppression of the deterioration of surface electrodes in an electrically heated catalyst. The electrically heated catalyst according to the invention is provided with a heat generation element to heat a catalyst, and a pair of electrodes to supply electricity to the heat generation element. Each of the pair of electrodes has a surface electrode which spreads along a surface of the heat generation element, and the surface electrodes are arranged in opposition to each other with the heat generation element being sandwiched therebetween.

Abstract: An EGR apparatus includes an EGR passage to allow part of exhaust gas discharged from a combustion chamber to flow as EGR gas into an intake passage and recirculate back to the combustion chamber, and an EGR valve to regulate the EGR gas in the EGR passage. A control unit is arranged to calculate a target opening degree of the EGR valve according to an operating condition after start-up of an engine and a warm-up state of the engine comes to an operation start state of the EGR valve, and correct the calculated target opening degree according to the warm-up state to control the EGR valve based on the corrected target opening degree during a period from when the EGR valve comes to the operation start state to when warm-up of the EGR valve is completed.