Denso Corporation

Toyota Jidosha Kabushiki Kaisha

Masashi Funada

Masaya Yamamoto

Makoto Nakamura

Akiyoshi Morii

A control system includes a boost-buck converter, a control apparatus and a voltage sensor. The boost-buck converter is provided between a battery and a motor-generator. The control apparatus controls the boost-buck converter. The voltage sensor outputs a sensor output value of a system voltage supplied to the motor. The control apparatus calculates a current stagnation continuation period based on the sensor output value of the voltage sensor and corrects a duty ratio of the boost-buck converter in accordance with a calculation value of the continuation period. The continuation period includes a predetermined time point, at which current stagnation is assumed to be generated. The current stagnation indicates that at least a reactor current stagnates. In the continuation period, a system voltage-related voltage continues to have a voltage difference of the same polarity side relative to a reference voltage.

Boost-buck converter control system

At the time of an engine start while the vehicle is driving, when a required vehicle driving force (TRQ) is smaller than or equal to a predetermined value (TRQth), an electronic control unit () estimates that the degree of deformation of a mount () is smaller than or equal to a predetermined degree and sets a second-cycle fuel injection amount (Q) so as to be larger than a first-cycle fuel injection amount (Q) at the time of the engine start. On the other hand, when the required vehicle driving force (TRQ) is larger than the predetermined value (TRQth), the electronic control unit () estimates that the degree of deformation of the mount () is larger than the predetermined degree and sets the first-cycle fuel injection amount (Q) so as to be larger than the second-cycle fuel injection amount (Q) at the time of the engine start.

In-vehicle internal combustion engine control device, and control method for internal combustion engine

A hybrid vehicle includes an internal combustion engine (), a motor (MG), and a secondary battery (), and travels in an electric-powered travel mode and in a hybrid travel mode. In the hybrid vehicle, an execution travel mode is set to one of two travel modes including an electric-powered travel priority mode where the hybrid vehicle travels with priority being given to the electric-powered travel mode over the hybrid travel mode, and a hybrid travel priority mode where the hybrid vehicle travels with priority being given to the hybrid travel mode over the electric-powered travel mode. When the execution travel mode is switched while the internal combustion engine () is being operated, the internal combustion engine () and the motor (MG) are controlled so that charging/discharging electric power for charging or discharging the secondary battery () is gradually changed and the hybrid vehicle travels in the switched execution travel mode (Sto S).

Growing community of inventors

Obu, Japan

Masashi Funada