公开(公告)号：US20200049115A1

公开(公告)日：2020-02-13

申请号：US16660053

申请日：2019-10-22

申请人： DENSO CORPORATION ,  MAZDA MOTOR CORPORATION

发明人： Yuri SAKAMOTO ,  Tomohiro KANAYA ,  Takafumi NISHIO

IPC分类号： F02M57/00 ,  F16K37/00 ,  G01M15/09

摘要： An estimation unit estimates a fuel pressure on a discharge side of a high-pressure pump based on an amount of fuel injection with a fuel injection valve from a time point at which a detected fuel pressure changes from a higher status than a first pressure to a lower status, assuming that the fuel has not been discharged with the high-pressure pump. The determination unit determines that a relief valve is in an open status based on a dropping mode of the estimated fuel pressure and a dropping mode of the detected fuel pressure.

公开(公告)号：US20170314495A1

公开(公告)日：2017-11-02

申请号：US15523427

申请日：2015-10-28

申请人： DENSO CORPORATION

发明人： Tomohiro KANAYA

IPC分类号： F02D41/26 ,  F02D41/06 ,  F01L1/344 ,  F02N11/08 ,  F02D13/02

CPC分类号： F02D41/26 ,  F01L1/3442 ,  F01L2001/3443 ,  F01L2001/34459 ,  F01L2001/34463 ,  F01L2001/34469 ,  F01L2001/34479 ,  F01L2001/34483 ,  F01L2250/02 ,  F01L2250/04 ,  F01L2800/01 ,  F01L2820/041 ,  F01L2820/042 ,  F02D13/02 ,  F02D13/0238 ,  F02D41/042 ,  F02D41/062 ,  F02D41/065 ,  F02D2013/0292 ,  F02D2041/001 ,  F02D2200/021 ,  F02D2200/023 ,  F02D2200/0414 ,  F02D2200/503 ,  F02N11/04 ,  F02N11/08 ,  F02N2250/06 ,  Y02T10/18

摘要： At a time of a startup in a non-lock state (at the time of a next startup in a case where an internal combustion engine is stopped in a non-lock state in which a VCT phase is not locked in an intermediate lock phase), it is determined whether or not the engine can be started up by most delayed startup processing. In a case where it is determined that the engine can be started up by the most delayed startup processing, the most delayed startup processing is performed. In this most delayed startup processing, the engine is cranked in a high rotation range not less than a specified rotation speed and a fuel injection and an ignition are started in a state in which the VCT phase is controlled to a vicinity of the most delayed phase (most delayed phase or within a specified range from the most delayed phase) to thereby start up the engine. In this way, at the time of the startup in the non-lock state, the engine can be quickly started up without locking the VCT phase.

公开(公告)号：US20160376944A1

公开(公告)日：2016-12-29

申请号：US15111022

申请日：2015-01-14

申请人： DENSO CORPORATION

发明人： Tomohiro KANAYA ,  Yasuhiro HAMAOKA

IPC分类号： F01L1/344 ,  F01L1/047

CPC分类号： F01L1/3442 ,  F01L1/047 ,  F01L2001/3443 ,  F01L2001/34453 ,  F01L2001/34463 ,  F01L2201/00 ,  F01L2820/044

摘要： A variable valve timing control device has, as control modes for adjusting inflow and outflow of oil with an OCV, a lock mode for moving a lock pin in a locking direction, a phase control mode for controlling a camshaft phase by a target phase in accordance with an operation state of an engine, and an oil filling mode for filling an advancement chamber and a retardation chamber with the oil in a state that the lock pin moves in the locking direction, before shifting from the lock mode to the phase control mode. When the oil filling mode has been selected, a target position of a spool is set based on viscosity of the oil, and the position of the spool is controlled so as to be the set target position.

摘要翻译： 可变气门正时控制装置具有用于通过OCV调节油的流入和流出的控制模式，用于沿锁定方向移动锁定销的锁定模式，用于根据目标相位控制凸轮轴相位的相位控制模式 具有发动机的操作状态，以及在从锁定模式转换到相位控制模式之前，在锁定销沿锁定方向移动的状态下，用油填充推进室和延迟室的注油模式。 当选择充油模式时，基于油的粘度来设定阀芯的目标位置，并且将阀芯的位置控制为设定的目标位置。