Toyota Jidosha Kabushiki Kaisha

Kazuki Tsurumi

Hiroshi Tanaka

Keisuke Nagasaka

Shigemasa Hirooka

Shingo Korenaga

A vehicle control device controls a vehicle including an internal combustion engine, a filter, an electrically heated catalyst, a first temperature sensor, and a second temperature sensor. An exhaust passage of the internal combustion engine is provided with the electrically heated catalyst, the first temperature sensor, the filter, and the second temperature sensor from an upstream side to a downstream side, and the control device includes an energization control unit that controls energization of the electrically heated catalyst, and a detection unit that detects whether or not the filter is removed based on a first temperature that is a temperature detected by the first temperature sensor and a second temperature that is a temperature detected by the second temperature sensor, and when the detection unit performs detection, the energization control unit energizes the electrically heated catalyst.

Control device for vehicle

According to one aspect of the present invention, there is provided a control device for an internal combustion engine, in which an electric heating catalyst (EHC) having a catalyst support generating heat by energizing is provided to an exhaust passage. The control device includes a control unit configured to energize the support in the case where a rapid change in intake air flow is detected based on an intake air flow of the internal combustion engine or a correlation value of the intake air flow, so as to suppress any occurrence of a crack caused by an increase in difference in temperature between predetermined portions at the support during the rapid change in intake air flow.

Control device and method for internal combustion engine

In an EHC, a ratio of a heat capacity of the second catalyst body with respect to a heat capacity of the first catalyst body is made within a range of 0.67-1.5. A ratio of an amount of coat of an OSC material in the second catalyst body with respect to an amount of coat of an OSC material in the first catalyst body is made larger than the ratio of the heat capacity of the second catalyst body with respect to the heat capacity of the first catalyst body. A ratio of an amount of support of a noble metal in the second catalyst body with respect to an amount of support of a noble metal in the first catalyst body is made smaller than the ratio of the heat capacity of the second catalyst body with respect to the heat capacity of the first catalyst body.

Electrically heated catalyst

A control system includes an electrical heating catalyzer, a measuring device and an electronic control unit. The measuring device measures an insulation resistance between a catalyst carrier and case of the electrical heating catalyzer. The electronic control unit determines that the electrical heating catalyzer has a failure when a variation width of the insulation resistance is smaller than or equal to a set value in a historical variation in the insulation resistance measured by the measuring device.

Growing community of inventors

Susono, Japan

Kazuki Tsurumi