公开(公告)号：US20180187582A1

公开(公告)日：2018-07-05

申请号：US15738436

申请日：2016-06-30

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Hiroshi YAGUCHI ,  Takeshi FUKUI

IPC: F01M13/02 ,  B60T17/02 ,  B60T13/52

CPC classification number: F01M13/021 ,  B60T13/52 ,  B60T17/00 ,  B60T17/02 ,  F01M13/00 ,  F01M13/023 ,  F01M2013/0094 ,  F01M2013/026 ,  F01M2013/027 ,  F02B37/00 ,  F02D2200/0406 ,  F02D2200/60 ,  F02D2250/08 ,  F02D2250/41

Abstract: This blow-by gas recirculation device for an internal combustion engine is provided with a vacuum pump which supplies negative pressure to a brake booster and usable for recirculation of blow-by gas to an intake passage. This device includes: a PCV device for recirculating blow-by gas in a crankcase to the intake passage; a ventilation shortage region determination unit which determines whether or not an operational region of the engine is a PCV ventilation flow rate shortage region; and a brake negative pressure determination unit which determines whether or not the negative pressure of the brake booster is secured. The vacuum pump ventilates blow-by gas in the crankcase only when the determination units determines that the operational region is the PCV ventilation flow rate shortage region and that the negative pressure is secured. This reduces a contact risk of blow-by gas with engine oil, and inhibits the degradation of the oil.

公开(公告)号：US20180156168A1

公开(公告)日：2018-06-07

申请号：US15575486

申请日：2016-06-29

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Hiroshi YAGUCHI ,  Takeshi FUKUI

IPC: F02M35/10 ,  F01M13/00 ,  F01M13/02 ,  B60T17/06

CPC classification number: F02M35/10229 ,  B60T13/52 ,  B60T17/00 ,  B60T17/02 ,  B60T17/06 ,  F01M13/00 ,  F01M13/0011 ,  F01M13/021 ,  F01M2013/0044 ,  F01M2013/026 ,  F02M35/10222

Abstract: This blow-by gas recirculation device for an internal combustion engine of a vehicle is provided with a vacuum pump which supplies negative pressure to a brake booster. The blow-by gas recirculation device includes: a fresh-air introduction passage for introducing a fresh air into crankcase from an intake passage upstream of a throttle valve; a PCV device for recirculating, to the intake passage downstream of the throttle valve, blow-by gas in the crankcase; and a suction/recirculation means which uses the vacuum pump to suck the blow-by gas from inside the crankcase, in a region where the blow-by gas ventilation quantity by the PCV device is insufficient, and recirculate the blow-by gas to the intake passage, while the fresh air is being introduced from the fresh-air introduction passage. As a result, the blow-by gas concentration in the crankcase is reduced, engine oil contact opportunities are reduced, and oil deterioration is inhibited.

公开(公告)号：US20230304528A1

公开(公告)日：2023-09-28

申请号：US18005877

申请日：2021-09-24

Applicant: NIPPON STEEL CORPORATION ,  TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Tatsuhiko ABE ,  Manabu KUBOTA ,  Satoru OKAWA ,  Motoichi MURAKAMI ,  Takashi KOYAMA ,  Yusuke MORITA ,  Takeshi FUKUI ,  Yusuke INUKAI ,  Yuichiro KAJIKI

IPC: F16C3/06 ,  C22C38/38 ,  C22C38/06 ,  C22C38/02 ,  C22C38/60

CPC classification number: F16C3/06 ,  C22C38/02 ,  C22C38/06 ,  C22C38/38 ,  C22C38/60

Abstract: A crankshaft with improved seizure resistance is provided. A crankshaft (10) is a crankshaft including journals (11) and pins (12), having a chemical composition of, in mass %: 0.35 to 0.40 % C; up to 0.70 % Si; 1.00 to 2.00 % Mn; up to 0.50 % Cr; up to 0.050 % Al; up to 0.020 % N; up to 0.020 % P; 0.005 to 0.200 % S; and balance Fe and impurities, each of the journals (11) and pins (12) having a surface microstructure containing tempered martensite in not less than 80 volume % and a surface hardness not higher than HV 450.

公开(公告)号：US20190226366A1

公开(公告)日：2019-07-25

申请号：US16239608

申请日：2019-01-04

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA ,  TAIHO KOGYO CO., Ltd.

Inventor： Yusuke MORITA ,  Motoichi MURAKAMI ,  Takeshi FUKUI ,  Yuichiro KAJIKI ,  Katsuhiro ASHIHARA ,  Alan HASE ,  Takashi IZUMI

IPC: F01M1/16 ,  F01M9/10

Abstract: A control device controls an internal combustion engine including: an elastic wave sensor arranged and configured to output a signal responsive to the strength of an acoustic emission wave produced at a sliding portion; and a variable oil pump. The control device is configured to execute an oil pressure control such that the oil pressure approaches a target oil pressure according to an engine operating condition. This oil pressure control includes a first pressure-increase processing executed where an AE correlation value correlated with the strength or occurrence frequency of the acoustic emission wave detected by the elastic wave sensor is greater than a first threshold value. The first pressure-increase processing increases the target oil pressure associated with a first engine operating condition present when the AE correlation value becomes greater than the first threshold value, as compared to when the AE correlation value is not greater than that.