Honda Motor Co., Ltd.

Satoshi Kodo

Mitsuhiro Iwadare

Tsunehiro Kobayashi

Fumiyasu Suga

Takuya Yamada

Provided are a drive system and a method for controlling the drive system which reduce a shock to a third shaft at the start of an internal combustion engine during EV driving. The drive system includes an engine, a first shaft connected to a crankshaft, a second shaft, a first clutch, a motor generator, a third shaft, a first transmission, a one-way clutch, and an ECU for controlling a gear ratio of the first transmission and the first clutch. The first transmission includes a rotating ring, a rocking portion, and a rotation radius variation mechanism. If an angular velocity of the rocking portion is higher than or equal to a rotational speed of the third shaft, the one-way clutch transmits a power in only one direction of the rocking portion to the third shaft.

Drive system and method for controlling drive system

Provided is a drive system that enables a reduction in the rise time of foot axis torque even if the drive system has a one-way clutch. The drive system includes a one-way clutch between a transmission and an output shaft. When a coasting determination unit determines to perform a coasting control, a control unit executes the coasting control by reducing the engine rotation speed of an internal combustion engine or stopping the engine rotation to bring the one-way clutch into a non-transmission state, and changing the transmission gear ratio of the transmission to a transmission gear ratio smaller than the transmission gear ratio calculated by a calculation unit.

Drive system

A power transmission apparatus includes a drive shaft, a driven shaft, a first transmission device, a first one-way power transmission mechanism, a second transmission device, a second one-way power transmission mechanism, and a controller. The first transmission device is to change power of the drive shaft. The first one-way power transmission mechanism is to transmit power changed by the first transmission device only in one direction to the driven shaft. The second transmission device is to change power of the driven shaft. The second one-way power transmission mechanism is to transmit power changed by the second transmission device only in one direction to the drive shaft. The controller is configured to change ratios of the first transmission device and the second transmission device. The controller is configured to make the ratio of the first transmission device larger than the ratio of the second transmission device.

Power transmission apparatus and method for controlling power transmission apparatus

There is provided a drive system for a vehicle. The system includes: an internal combustion engine (ENG); a transmission mechanism (TM) a one-way clutch (OWC); a rotated driving member (); an electric motor (MG) that rotates the output shaft of the internal combustion engine; an electric motor generator (MG) that transmits the rotational power to the rotated driving member and performs regenerative operation by receiving the rotational power output from the rotated driving member; and a controller () configured to cut off a fuel supply to the internal combustion engine and control the electric motor to rotate the output shaft of the internal combustion engine while the electric motor generator performs the regenerative operation.

Drive system for vehicle and vehicle driving method

A temperature control device for a catalyst, which is capable of rapidly activating a catalyst while maintaining reduced exhaust emissions, by properly controlling the temperature of exhaust gases according to an activated state of the catalyst. If the catalyst is determined not to be in the activated state, based on an acquired temperature of the catalyst, the temperature control device for a catalyst sets a temperature higher than the temperature of the catalyst by a predetermined temperature is set as a target exhaust gas temperature. Further, the temperature control device controls a combustion control parameter including at least one of an amount of recirculation of exhaust gases by an EGR device, an amount of intake air drawn into an engine, a supply amount and a supply timing of fuel supplied into the engine, according to the set target exhaust gas temperature.

Growing community of inventors

Saitama, Japan

Satoshi Kodo