Patent application number | Description | Published |
20120060481 | VEHICLE CONTROL DEVICE - A vehicle control device applied to a vehicle including an internal combustion engine and an electrically heated catalyst which is warmed by applying a current, and includes a catalyst carrier supporting a catalyst and a carrier retention unit that retains the catalyst carrier and has an electrical insulation property. The control unit performs a control of suppressing a supply of an unburned gas from the internal combustion engine to the electrically heated catalyst so that the carrier retention unit is maintained at a lower temperature than the catalyst, when a condition for performing a fuel cut of the internal combustion engine during a deceleration is satisfied. Therefore, it is possible to suppress a rapid cooling of the catalyst, and it becomes possible to maintain a temperature of the carrier retention unit at a lower temperature than a temperature of the catalyst. | 03-15-2012 |
20120131907 | Exhaust Gas Purification Apparatus of an Internal Combustion Engine - 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. In order to solve this subject, the present invention resides in an exhaust gas purification apparatus of an internal combustion engine which is provided with a catalyst carrier having electrodes, a case in which the catalyst carrier is accommodated, a mat member arranged between the catalyst carrier and the case, a space part extending from the catalyst carrier to the case while passing through the mat member, and electrode terminals accommodated in said space part for supplying electric power to the electrodes of the catalyst carrier, wherein exhaust gas and condensed water are kept from permeating into the space part through the mat member or the catalyst carrier, by the provision of a pressure supply unit which supplies a positive pressure to the space part. | 05-31-2012 |
20120171082 | ELECTRIC HEATING CATALYST - The electricity is suppressed from flowing through a case of an electric heating catalyst. The electric heating catalyst comprises a heat generating element which generates heat by applying electricity; a case which accommodates the heat generating element; a mat which is provided between the heat generating element and the case and which insulates the electricity; and an inner tube which is provided on an inner side as compared with the case and on an outer side as compared with the heat generating element and which is supported by the mat while dividing the mat into a part disposed on a case side and a part disposed on a heat generating element side; wherein distances between the inner tube and the case are provided such that the distance is required to support the inner tube at a portion at which the mat exists, and the distance is required to avoid occurrence of any electric discharge between the inner tube and the case at a portion at which the inner tube protrudes from the mat. | 07-05-2012 |
20120247090 | EXHAUST GAS PURIFYING DEVICE FOR INTERNAL COMBUSTION ENGINE - The exhaust gas purifying device of an internal combustion engine includes: an electrically heated catalyst which is provided on an exhaust passage of the internal combustion engine, which purifies the exhaust gas drawn to the exhaust passage, and is warmed by electrification; and an electrification characteristic setting unit which set an electrification characteristic indicating a characteristic of an electrification resistance value in the electrically heated catalyst, in accordance with an electrification condition at a time of starting the electrification of the electrically heated catalyst. Thus, various determinations and controls relating to the electrically heated catalyst and using the electrification characteristic can be accurately performed. | 10-04-2012 |
20120260638 | VEHICLE CONTROL DEVICE - A vehicle control device applied to a vehicle including an internal combustion engine and an electrically heated catalyst which is warmed by applying a current, and includes a catalyst carrier supporting a catalyst and a carrier retention unit that retains the catalyst carrier and has an electrical insulation property. The vehicle control device includes an insulation resistance determination unit which determines whether or not an insulation resistance of the carrier retention unit decreases to a value equal to or lower than a predetermined value, and an applying current prohibition unit which prohibits applying the current to the electrically heated catalyst when the insulation resistance determination unit determines that the insulation resistance decreases to the value equal to or lower than the predetermined value. Therefore, it is possible to appropriately control of applying the current to the electrically heated catalyst based on the insulation property of the carrier retention unit, and hence it becomes possible to appropriately prevent an electrical leak of the electrically heated catalyst. | 10-18-2012 |
20130011300 | EXHAUST GAS PURIFYING DEVICE FOR INTERNAL COMBUSTION ENGINE - 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. | 01-10-2013 |
20130022513 | ELECTRIC HEATING TYPE CATALYST AND A METHOD FOR MANUFACTURING THE SAME - Electricity is suppressed from flowing to a case ( | 01-24-2013 |
20130025267 | ELECTRICALLY-HEATED CATALYTIC CONVERTER - An electrically-heated catalytic converter comprises a catalyst support which produces heat when electric current is applied, a holding mat made of an electrical insulating material, the holding mat being provided so as to cover an outer circumference of the catalyst support, and a case which houses the catalyst support and holds the catalyst support via the holding mat. The catalytic converter treats gas flowing in the case by a catalyst supported on the catalyst support. The holding mat has a water-absorbing property. An insulation layer made of an electrical insulating material is provided between the case and the holding mat. | 01-31-2013 |
20130164185 | ELECTRICALLY HEATED CATALYST - The flow of electricity to the case ( | 06-27-2013 |
20130200060 | ELECTRIC HEATING CATALYST - An object of the present invention is to suppress the decrease in the insulation resistance between an electrode and a case resulting from condensed water in an electric heating catalyst (EHC). The EHC includes a heat generating element which generates heat by applying electricity and which heats a catalyst, a case which accommodates the heat generating element, and an insulating member which is provided between the heat generating element and the case, and which provides insulation from electricity. An electrode chamber, which is a space formed around an electrode connected to the heat generating element, is occluded by an occluding member, which has an airtightness higher than those of the heat generating element and the insulating member, in the case of the EHC. | 08-08-2013 |
20130209321 | ELECTRIC HEATING CATALYST - The present invention is intended to suppress a reduction in insulation between a heat generation element and a case resulting from PM in an electric heating catalyst. In the electric heating catalyst which has an inner pipe ( | 08-15-2013 |
20130306623 | ELECTRIC HEATING CATALYST - The electricity is suppressed from flowing through a case ( | 11-21-2013 |
20140230414 | ELECTRIC HEATING CATALYST - An electric heating catalyst (EHC) in which a short circuit between a heat generation element and a case in EHC is suppressed. The EHC includes a heat generation element (catalyst carrier) electrically energized to generate heat; a case receiving the heat generation element; an insulating support member between the heat generation element and the case; a tubular inner pipe inserted into the insulating support member and located between the heat generation element and the case. The inner pipe has an end protruding into an exhaust gas from the insulating support member's end face, and the inner pipe has an electrically insulating layer formed on an entire surface, or the inner pipe is formed of an electrically insulating material; and an inner pipe heater supplied with electricity through a path different from a path through which electricity is supplied to the heat generation element, thereby heating the inner pipe's protrusion portion. | 08-21-2014 |
20140305102 | CONTROL DEVICE FOR AN ELECTRICALLY HEATED CATALYST, AND ELECTRODE DETERIORATION DEGREE ESTIMATION DEVICE FOR AN ELECTRICALLY HEATED CATALYST - 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. Then, when a frequency becomes large in which a condition was satisfied in which a difference in temperature between two points located at a predetermined distance from each other on surfaces or in insides of the surface electrodes exceeds a predetermined temperature difference, an electric power supplied to the heat generation element is decreased, and an amount of heat supplied to the EHC by an exhaust gas is increased, as compared with when the frequency is small. | 10-16-2014 |
20140352283 | CONTROL APPARATUS FOR AN INTERNAL COMBUSTION ENGINE - 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. With this construction, the occurrence of cracks inside the heat generation element of the electrically heated catalyst is suppressed. | 12-04-2014 |