公开(公告)号：US20190170072A1

公开(公告)日：2019-06-06

申请号：US16190365

申请日：2018-11-14

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Yuya YOSHIKAWA ,  Isao Nakajima ,  Akihiro Katayama ,  Ryo Suzuki ,  Sohichi Imai ,  Eiichiro Kido

IPC: F02D41/00 ,  F02P5/04 ,  F02P5/15 ,  F02D41/38 ,  F02D41/26

CPC classification number: F02D41/008 ,  F02D41/1408 ,  F02D41/1475 ,  F02D41/1497 ,  F02D41/1498 ,  F02D41/2458 ,  F02D41/263 ,  F02D41/38 ,  F02D41/401 ,  F02D2200/0614 ,  F02D2200/1002 ,  F02D2200/1015 ,  F02P5/045 ,  F02P5/15 ,  F02P5/1502

Abstract: A first limit requesting process limits a dither control process of fuel injection valves in such a manner that the absolute value of the difference between the air-fuel ratios of the cylinders becomes smaller when the degree of variation of the injection amounts of the fuel injection valves provided for respective cylinders is great than when the degree of variation is small. A second limit requesting process limits the dither control process in such a manner that the absolute value is smaller when the torque fluctuation amount of the internal combustion engine is great than when the torque fluctuation amount is small. The limiting process limits the dither control process in accordance with one of requests generated by the first limit requesting process and the second limit requesting process that causes the absolute value to be smaller than the other.

公开(公告)号：US10563602B2

公开(公告)日：2020-02-18

申请号：US16152036

申请日：2018-10-04

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Yuya Yoshikawa ,  Isao Nakajima ,  Akihiro Katayama ,  Ryo Suzuki ,  Sohichi Imai ,  Eiichiro Kido

IPC: F02P5/15 ,  F02D41/14 ,  F02D41/00

Abstract: A controller learns the degree of variation in the injection amount of fuel injection valves provided for respective cylinders when the fuel injection valves are operated to control the air-fuel ratios of the respective cylinders to be equal to each other. A first advancement requesting process causes the request for the ignition timing to be more advanced when the degree of variation is great than when the degree of variation is small. A second advancement requesting process causes the request for the ignition timing to be more advanced when the torque fluctuation amount of the internal combustion engine is than when the torque fluctuation amount is small. The ignition control process controls the ignition timing in accordance with the request of the more advanced one of the first advancement requesting process and the second advancement requesting process.

公开(公告)号：US10787983B2

公开(公告)日：2020-09-29

申请号：US16141013

申请日：2018-09-25

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Masanao Idogawa ,  Isao Nakajima ,  Masahiro Noguchi

IPC: F02D41/00 ,  F02D41/24 ,  F02B37/00 ,  F02B37/18 ,  F02D41/26 ,  F02D41/20

Abstract: A wastegate opens and closes the flow path of a bypass passage that bypasses the turbine of a forced-induction device. A processor changes the drive current for the electric actuator in a stepwise manner from a state where the wastegate is stationary in a given standstill position. The amount of change in the drive current that is made until the wastegate is determined to be moved is learned as a learning value. A requested drive current for moving the wastegate to a target opening degree is corrected based on the learning value.

公开(公告)号：US10677180B2

公开(公告)日：2020-06-09

申请号：US16190365

申请日：2018-11-14

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Yuya Yoshikawa ,  Isao Nakajima ,  Akihiro Katayama ,  Ryo Suzuki ,  Sohichi Imai ,  Eiichiro Kido

IPC: F02M41/00 ,  F02D41/00 ,  F02P5/04 ,  F02P5/15 ,  F02D41/26 ,  F02D41/38 ,  F02D41/24 ,  F02D41/14 ,  F02D41/40

Abstract: A first limit requesting process limits a dither control process of fuel injection valves in such a manner that the absolute value of the difference between the air-fuel ratios of the cylinders becomes smaller when the degree of variation of the injection amounts of the fuel injection valves provided for respective cylinders is great than when the degree of variation is small. A second limit requesting process limits the dither control process in such a manner that the absolute value is smaller when the torque fluctuation amount of the internal combustion engine is great than when the torque fluctuation amount is small. The limiting process limits the dither control process in accordance with one of requests generated by the first limit requesting process and the second limit requesting process that causes the absolute value to be smaller than the other.

公开(公告)号：US09932923B2

公开(公告)日：2018-04-03

申请号：US15078031

申请日：2016-03-23

Applicant: Toyota Jidosha Kabushiki Kaisha

Inventor： Isao Nakajima

IPC: G06F17/00 ,  F02D41/22 ,  F02D41/00 ,  F02D41/14 ,  G01M15/10 ,  F02D41/30 ,  F02D19/06 ,  F02D19/08

CPC classification number: F02D41/22 ,  F02D19/0692 ,  F02D19/084 ,  F02D19/087 ,  F02D19/088 ,  F02D41/0025 ,  F02D41/1454 ,  F02D41/1495 ,  F02D41/222 ,  F02D41/3094 ,  G01M15/102 ,  G01M15/104 ,  Y02T10/36

Abstract: An internal combustion engine to which the apparatus is applied is a multi-cylinder internal combustion engine that includes a passage injection valve and a cylinder injection valve and that can use gasoline and alcohol as fuel. The apparatus performs abnormality determination for a determination object device, based on a detection signal of an oxygen sensor provided in an exhaust passage of the internal combustion engine. The concentration sensor detects alcohol concentration ALp of the fuel in a first fuel passage through which the fuel is fed to the passage injection valve, and alcohol concentration ALd of the fuel in a second fuel passage through which the fuel is fed to the cylinder injection valve. When a difference ΔAL between the alcohol concentrations ALp, ALd is a determination value or greater (S13: YES), the execution of the abnormality determination is prohibited (S12).

公开(公告)号：US09752523B2

公开(公告)日：2017-09-05

申请号：US14785030

申请日：2014-03-28

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Yuya Yoshikawa ,  Tokiji Ito ,  Isao Nakajima ,  Hiroaki Tsuji ,  Toshihiro Kato ,  Yoshihisa Oda ,  Masashi Hakariya ,  Masahide Okada ,  Yoshifumi Matsuda

IPC: F02D41/14 ,  F02D41/24 ,  F02D41/00

CPC classification number: F02D41/1454 ,  F02D41/0085 ,  F02D41/1441 ,  F02D41/1456 ,  F02D41/1495 ,  F02D41/2454 ,  F02D2041/1422

Abstract: An air-fuel ratio control apparatus for an internal combustion engine is provided. A controller is programmed to perform correction amount guard control allowing adjustment of a correction amount by setting a limit on the correction amount when an appearance frequency of a state where an output value from a downstream sensor is leaner than a predetermined value is equal to or higher than a predetermined value. When a state where the output value from the downstream sensor is leaner than the predetermined value lasts for a duration equal to or longer than a predetermined time, an incorporation speed at which, during learning control, the correction amount for sub feedback control is incorporated into a learning value is set to a larger value that when the duration is shorter than the predetermined time, and performance of the correction amount guard control is suppressed until the learning control is completed.