Internal combustion engine
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsMakoto Okawa, Kazuhito Sakai
Life of this patent
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Abstract
In the present invention, an internal combustion engine is provided with a variable-compression-ratio mechanism with a variable mechanical compression ratio and the variable-compression-ratio mechanism comprises a drive device for changing the volume of a combustion chamber when a piston reaches top dead center. The drive device comprises a reverse input blocking clutch disposed in a drive power transmission path for transmitting the rotational force of a rotator. A control device estimates the reverse input torque applied to an output shaft of the reverse input blocking clutch and sets a gradient for torque output by the rotator and a continuation duration for continuing the torque increase on the basis of the reverse input torque.
Claims8
An internal combustion engine comprising a variable compression ratio mechanism able to change a mechanical compression ratio, wherein
- the variable compression ratio mechanism includes a drive device for changing a volume of a combustion chamber when a piston reaches top dead center and a control device controlling the drive device,
- the drive device includes a rotating machine and a clutch arranged in a drive force transmission path transmitting the rotational force of the rotating machine,
- the clutch is formed so as to block a reverse input torque applied to an output shaft in a rotation direction causing the mechanical compression ratio to fall, and
- the control device estimates a reverse input torque applied to the output shaft of the clutch, sets a torque gradient to be output by the rotating machine and a continuation time for continuation of increase of torque based on the reverse input torque, and releases a locked state of the clutch based on the torque gradient and the continuation time.
Dependencies are inferred from the claim text.