ENGINE STARTUP CONTROL DEVICE FOR HYBRID VEHICLE

WIPO Patent Application WO/2013/030985

A1

In a hybrid vehicle, at the time of starting up, by employing ignition startup, a direct-injection engine (12) in which one of the cylinders is at rest near the top dead center thereof: the engine rotation speed (NE) is raised by directly injecting a fuel into a first cylinder (K1), which is located before a second cylinder (K2) in the order of ignition and is in the expansion stroke and in which the exhaust valve is not open, and igniting the fuel to cause a first explosion in the first cylinder (K1); and in a maximum period (L) immediately after the engine rotation speed (NE) has started to increase, assistance to the increase of the engine rotation speed (NE) is started by transmitting an assist torque, which is output from a motor generator (MG), to the direct-injection engine (12) via a K0 clutch (34). In this way, the direct-injection engine (12) at rest can be started up by using a necessary and sufficient assist torque, i.e., electric energy, and thus, electric energy for engine startup to be stored in a battery (power storage device) (44) at all times is reduced. Thus, the EV drive range is expanded, and the fuel economy of the vehicle is suitably improved.

KOJIMA SUSUMU (JP)
NAKANISHI NAOKI (JP)
IDESHIO YUKIHIKO (JP)

PCT/JP2011/069793

March 07, 2013

August 31, 2011

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TOYOTA MOTOR CO LTD (JP)
KOJIMA SUSUMU (JP)
NAKANISHI NAOKI (JP)
IDESHIO YUKIHIKO (JP)

B60W10/06; B60K6/48; B60K6/54; B60L50/16; B60W10/02; B60W10/08; B60W20/00; F02D17/00; F02D29/02

JP2009527411A	2009-07-30
JP2010077859A	2010-04-08
JP2005002847A	2005-01-06
JP2010084659A	2010-04-15
JP2009030525A	2009-02-12
JP2007107436A	2007-04-26
JP2009527411A	2009-07-30

See also references of EP 2752341A4

IKEDA HARUYUKI (JP)
Haruyuki Ikeda (JP)

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