Toyota Jidosha Kabushiki Kaisha

Kohei Umehara

Hiroshi Kobayashi

Shinji Sadakane

Shintaro Hotta

Masato Ikemoto

Fumio Takamiya

Akira Hojo

The internal combustion engine includes a fuel injection valve, a cylinder into which the fuel injected by the fuel injection valve is introduced, an exhaust passage through which the exhaust generated by the combustion of the fuel in the cylinder flows, a catalyst installed in the exhaust passage, an upstream air-fuel ratio sensor disposed upstream of the catalyst in the exhaust passage, and a downstream air-fuel ratio sensor disposed downstream of the catalyst in the exhaust passage. The processing circuit calculates a detection value difference which is a difference between detection values of the two air-fuel ratio sensors when the warm-up of the catalyst is completed. When the detection value difference is in the predetermined detection value difference range, the processing circuit lowers the warm-up completion temperature as compared with a case where the detection value difference is not in the detection value difference range.

Internal combustion engine control device

A control system of a Miller cycle engine includes an ECU. The ECU executes an early closing Miller cycle operating mode in which a variable valve mechanism is controlled to close an intake valve before an intake bottom dead center. The ECU executes a decompression mode in which the variable valve mechanism is controlled to close the intake valve at a point later than the intake BDC, when the engine is started. The electronic control unit executes the early closing Miller cycle operating mode after completion of the decompression mode. A later closing amount of the intake valve relative to the intake BDC, for use in the decompression mode, is larger than an early closing amount of the intake valve relative to the intake BDC when the closing timing of the intake valve is most advanced.

Control system of miller cycle engine and method of controlling miller cycle engine

Growing community of inventors

Susono, Japan

Kohei Umehara