Nissan Motor Company Limited

Tomoya Tojo

Takashi Tanabe

Hiroki Ichihara

Makoto Kobayashi

Katsutoshi Nakamura

Tsuyoshi Arinaga

Kensuke Ikehara

A hybrid vehicle includes an internal combustion engine and a motor generator, wherein the internal combustion engine includes a variable compression ratio mechanism structured to vary in mechanical compression ratio depending on variation in position of a compression ratio control member structured to move due to driving of an electric actuator. A control method for the hybrid vehicle includes: measuring a state of charge of a battery connected to the motor generator; and in response to regenerative operation of the motor generator in a state that the state of charge of the battery is equal to or higher than a predetermined level, consuming generated electric power by driving the electric actuator of the variable compression ratio mechanism.

Control method and control device for hybrid vehicle

A lower link () is provided with an oil hole () in a crank pin bearing portion () in order to supply a jet of oil to a connecting portion between an upper pin () and an upper link (). Oil hole () is composed of a first oil hole () linearly extending from the inner peripheral surface of crank pin bearing portion () outwardly in the radial direction, and a second oil hole () linearly extending from the outer surface of lower link () so as to intersect a distal end portion of first oil hole (). An inclination angle (θ) of first oil hole () with a divided surface () set as a reference becomes relatively small, and hence the position of an oil inlet () involving a problem of stress concentration becomes closer to divided surface () exhibiting a relatively low stress. Consequently, the stress concentration at oil inlet () is alleviated.

Lower link of internal combustion engine

A lower link () is formed of two components by being divided at a dividing surface () including the central axis of a crank pin bearing portion (), the two components including a lower link upper () with an upper pin bearing portion () and a lower link lower () with a control pin bearing portion (). The dividing surface () includes a first dividing surface () located more on the upper link side than the crank pin bearing portion () and a second dividing surface () located more on the control link side than the crank pin bearing portion (). In the lower link (), the first dividing surface () has a surface roughness larger than a surface roughness of the second dividing surface ().

Growing community of inventors

Kanagawa, Japan

Tomoya Tojo