公开(公告)号：US10774777B2

公开(公告)日：2020-09-15

申请号：US16037533

申请日：2018-07-17

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Sachio Mori ,  Koshiro Kimura ,  Satoshi Tsuda

IPC: F02P5/00 ,  F02D43/00 ,  F02D41/00 ,  F02D41/14 ,  F02B23/08 ,  F02B31/06 ,  F02D35/02 ,  F02D31/00 ,  F02P5/04 ,  F02P5/145 ,  F02D41/18 ,  F02B23/10 ,  F02B31/00 ,  F02B75/12

Abstract: An internal combustion engine includes an ignition plug and an electronic control unit. The electronic control unit is configured to: (i) execute a lean-burn operation in a first operation region, (ii) execute an operation in a second operation region at an air-fuel ratio lower than an air-fuel ratio during the lean-burn operation, and (iii) control a gas flow in a cylinder so that a ratio of a change in a gas flow speed around the ignition plug during ignition to a change in an engine rotation speed in a first engine rotation speed region within the first operation region is smaller than the ratio in a second engine rotation speed region within the second operation region.

公开(公告)号：US10047680B2

公开(公告)日：2018-08-14

申请号：US15071448

申请日：2016-03-16

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Satoshi Tsuda

IPC: F02D9/08 ,  F02D9/02 ,  F02D41/24 ,  F02P5/15 ,  F02M35/10 ,  F02D41/22

Abstract: An air flow velocity calculating device of a internal combustion engine, has a cylinder, a spark plug, an air intake passage, an air flow controlling valve, an air flow velocity calculating portion, and an electric discharge current controlling portion. An electric discharge between a center electrode and a ground electrode is sustained during an electric discharge sustaining period. The electric discharge sustaining period is a period from when the electric discharge begins to when the electric discharge is intercepted by the air flow. Energy is supplied to the spark plug, so that the electric discharge current is sustained at a constant value by the electric discharge current controlling portion during an ignition period. The ignition period is a sum of an electric discharge sustaining period of a first electric discharge and electric discharge sustaining periods of second and subsequent electric discharges in one cycle of the internal combustion engine.

公开(公告)号：US09976491B2

公开(公告)日：2018-05-22

申请号：US14916638

申请日：2014-08-29

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Sachio Mori ,  Koshiro Kimura ,  Satoshi Tsuda

IPC: F02B31/00 ,  F02D9/02 ,  F02B23/10 ,  F02B31/08 ,  F01L3/06 ,  F02B31/06 ,  F02D41/00 ,  F02P13/00 ,  F01L13/00 ,  F01L1/053 ,  F01L9/04

CPC classification number: F02D9/02 ,  F01L3/06 ,  F01L13/0015 ,  F01L2001/0537 ,  F01L2009/0411 ,  F02B23/104 ,  F02B31/06 ,  F02B31/085 ,  F02B2023/106 ,  F02B2275/48 ,  F02D41/0002 ,  F02D2009/023 ,  F02D2041/001 ,  F02P13/00 ,  Y02T10/125 ,  Y02T10/146

Abstract: Provided is an internal combustion engine including a sparkplug disposed in the vicinity of the center portion of an upper wall surface of a combustion chamber. Tumble flow generated during lean burn operation is controlled such that the tumble flow shape changes according to the engine rotation speed between a first tumble shape (usual tumble shape) in which the flow direction of a gas around the sparkplug at the time of ignition is direction from an intake valve side toward an exhaust valve side in a latter half of a compression stroke, and a second tumble shape (ω tumble shape) in which the flow direction of the gas is reversed in the latter half of the compression stroke from the direction from the intake valve side toward the exhaust valve side to the direction from the exhaust valve side toward the intake valve side.