VARIABLE VALVE GEAR SYSTEM

WIPO Patent Application WO/2007/037177

A1

A variable valve gear system, comprising a changeover mechanism changing over between a both valve variable state and a single valve variable state for increasing the durability of the changeover mechanism. While an internal combustion engine is idled before a vehicle is started, the operating state of the internal combustion engine comes within a single valve small lift area (point A). In this case, the changeover mechanism is brought into the single valve variable state. After the vehicle is started, the operating state is changed from the point A → B → C, and transferred to a both valve large lift area. Then, to shift up, a clutch is disengaged and an accelerator pedal is released to return the operating state to the single valve small lift area (point A). In this case, since a time in which the operating state comes within the both valve large lift area is short and an actual profit obtained by changing over the operating state to the both valve variable state is small, a changeover operation to the both valve variable state is prohibited in the operating state of point B → C.

MAEHARA TOSHIYUKI (JP)

PCT/JP2006/318829

April 05, 2007

September 22, 2006

Click for automatic bibliography generation  

TOYOTA MOTOR CO LTD (JP)
MAEHARA TOSHIYUKI (JP)

F01L13/00; F02D13/02

JP2004100555A	2004-04-02
JPH04232344A	1992-08-20
JPH05104990A	1993-04-27
JPH051576A	1993-01-08
JPH05133212A	1993-05-28
JPH07238845A	1995-09-12

TAKAHASHI, Hideki et al. (Takahashi & Partners, 5th Floor, Intec 88 Bldg., 20,, Araki-cho, Shinjuku-k, Tokyo 07, JP)

View/Download PDF      PDF Help

Previous Patent: ELEVATOR CONTROL SYSTEM

Next Patent: SIMULATOR, EFFECT MEASURING DEVICE, AND SALE PROMOTION SUPPORTING SYSTEM