公开(公告)号：US20020007808A1

公开(公告)日：2002-01-24

申请号：US09962682

申请日：2001-09-26

申请人： Toyota Jidosha Kabushiki Kaisha

发明人： Yoshihito Moriya ,  Shinichiro Kikuoka ,  Shuuji Nakano ,  Hideo Nagaosa

IPC分类号： F01L001/00

CPC分类号： F01L13/0042 ,  F01L1/08 ,  F01L1/34 ,  F01L1/344

摘要： Variable valve characteristic control apparatuses realize a change in a valve characteristic in accordance with a requirement of an internal combustion engine and a three-dimensional cam for use in the variable valve characteristic control apparatus. In the case of an intake valve, two lift patterns and continuously varying lift patterns between the two lift patterns are realized by the three-dimensional cam through the driving of the variable valve characteristic control apparatus. The two lift patterns provide different amounts of lift in the delay side of a peak within a valve operation angle, but provide equal amounts of lift in the delay side of the peak. Since the intake cam has the two lift patterns, it is possible to select a phase where the two lift patterns provide equal amounts of lift and provide different amounts of lift in phases other than the equal-lift phase so as to accord to the characteristics of the internal combustion engine. Therefore, it is possible to achieve conformation to the characteristics of the engine and therefore constantly realize a suitable valve characteristic in accordance with the operational condition of the engine. Hence, improvements can be achieved in the output performance of the engine, the fuel consumption, the combustion stability and the like.

公开(公告)号：US20020017258A1

公开(公告)日：2002-02-14

申请号：US09963561

申请日：2001-09-27

申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA

发明人： Yoshihito Moriya ,  Hideo Nagaosa ,  Shuuji Nakano ,  Shinichiro Kikuoka

IPC分类号： F01L001/34

CPC分类号： F02D13/0207 ,  F01L1/34 ,  F01L13/0042 ,  F01L2800/00 ,  F01L2800/11 ,  F02D13/0211 ,  F02D13/0219 ,  F02D13/0226 ,  F02D13/0246 ,  F02D13/0261 ,  F02D13/0265 ,  Y02T10/18

摘要： A valve train for an internal combustion engine has a variable valve performance mechanism for changing the valve open angle of at least one set of intake valves and exhaust valves. The valve train further includes an electronic control unit (ECU) for controlling the variable valve performance mechanism and a sensor for detecting the running state of the engine. The ECU judges whether there is a malfunction in the engine based on detection signals from the sensor. if there is a malfunction in the engine, the ECU actuates the variable valve performance mechanism to decrease the valve overlap thereby performing a failsafe. The ECU also advances the closing timing of the intake valves. Alternatively, the ECU retards the opening timing of the exhaust valves.

摘要翻译： 用于内燃机的气门机构具有用于改变至少一组进气门和排气门的阀开度的可变阀性能机构。 气门机构还包括用于控制可变阀性能机构的电子控制单元（ECU）和用于检测发动机的运行状态的传感器。 ECU根据来自传感器的检测信号判断发动机是否发生故障。 如果发动机发生故障，则ECU致动可变阀性能机构以减小阀重叠，从而执行故障保护。 ECU还提前进气阀的关闭时机。 或者，ECU延迟排气门的打开正时。