Hybrid vehicle

Patent metadata

Field	Value
Publication number	US-2016114791-A1
Application number	US-201514918885-A
Country	US
Kind code	A1
Filing date	Oct 21, 2015
Priority date	Oct 22, 2014
Publication date	Apr 28, 2016
Grant date	—

Abstract

When a catalyst temperature is lower than a predetermined temperature on a second or subsequent start of an engine since system activation of a vehicle, a catalyst warm-up request is output for the purpose of warming up a catalyst in a catalytic converter. An output limit Wout of a battery is not increased in response to a second or subsequent output of the catalyst warm-up request, while being increased in response to a first output of the catalyst warm-up request. Accordingly, the catalyst warm-up in response to the second or subsequent output of the catalyst warm-up request since the system activation suppresses excessive output of electric power from the battery and thereby suppresses deterioration of the battery. Catalyst warm-up is performed in response to the second or subsequent output of the catalyst warm-up request. This suppresses deterioration of emission. As a result, this configuration satisfies both (balances) suppression of deterioration of the battery and suppression of deterioration of emission.

First claim

1 . A hybrid vehicle, comprising an internal combustion engine that is configured to output power for running, a generator that is configured to generate electricity with the power of the internal combustion engine, a motor that is configured to output power for running, a battery that is configured to transmit electric power to and from the generator and the motor, and a controller that is configured to perform first catalyst warm-up control for catalyst warm-up when there is a need for warm-up of a catalyst in an exhaust emission control device for the internal combustion engine at a first start of the internal combustion engine since system activation, wherein
when there is a need for warm-up of the catalyst in the exhaust emission control device for the internal combustion engine at a second or subsequent start of the internal combustion engine since the system activation, the controller performs second catalyst warm-up control for catalyst warm-up with applying restrictions compared with the first catalyst warm-up control.

2 . The hybrid vehicle according to claim 1 ,
wherein the first catalyst warm-up control is control with increasing an output limit that is maximum electric power dischargeable from the battery, and the second catalyst warm-up control is control with applying restrictions on increasing the output limit compared with the first catalyst warm-up control.

3 . The hybrid vehicle according to claim 1 ,
wherein the first catalyst warm-up control is control with delaying an ignition timing of the internal combustion engine, and the second catalyst warm-up control is control with applying restrictions on delaying the ignition timing compared with the first catalyst warm-up control.

4 . The hybrid vehicle according to claim 1 ,
wherein the first catalyst warm-up control is control performed in a range of a first allowable time, and the second catalyst warm-up control is control performed in a range of a second allowable time that is shorter than the first allowable time.

5 . The hybrid vehicle according to claim 1 ,
wherein the first catalyst warm-up control is control with increasing an output limit that is maximum electric power dischargeable from the battery and with delaying an ignition timing of the internal combustion engine, and the second catalyst warm-up control is control with applying restrictions on increasing the output limit compared with the first catalyst warm-up control and with applying restrictions on delaying the ignition timing compared with the first catalyst warm-up control.

6 . The hybrid vehicle according to claim 1 ,
wherein the first catalyst warm-up control is control which is performed with increasing an output limit that is maximum electric power dischargeable from the battery and which is performed in a range of a first allowable time, and the second catalyst warm-up control is control which is performed with applying restrictions on increasing the output limit compared with the first catalyst warm-up control and which is performed in a range of a second allowable time that is shorter than the first allowable time.

7 . The hybrid vehicle according to claim 1 ,
wherein the first catalyst warm-up control is control which is performed with delaying an ignition timing of the internal combustion engine and which is performed in a range of a first allowable time, and the second catalyst warm-up control is control which is performed with applying restrictions on delaying the ignition timing compared with the first catalyst warm-up control and which is performed in a range of a second allowable time that is shorter than the first allowable time.

8 . The hybrid vehicle according to claim 1 ,
wherein the first catalyst warm-up control is control which is performed with increasing an output limit that is maximum electric power dischargeable from the battery and with delaying an ignition timing of the internal combustion engine and which is performed in a range of a first allowable time, and the second catalyst warm-up control is control which is performed with applying restrictions on increasing the output limit compared with the first catalyst warm-up control and with applying restrictions on delaying the ignition timing compared with the first catalyst warm-up control and which is performed in a range of a second allowable time that is shorter than the first allowable time.

Assignees

• Toyota Motor Co Ltd

Inventors

• Muta Koichiro
• Kamatani Hideki
• Itoh Takao
• Yamasaki Makoto
• Mano Ryo
• Kagami Masahiro
• Endo Hiroki

Classifications

• F01N3/20

  specially adapted for catalytic conversion (F01N3/22 takes precedence) · CPC title

• Y10S903/905

  Combustion engine · CPC title

• F02D29/02

  peculiar to engines driving vehicles; peculiar to engines driving variable pitch propellers · CPC title

• B60W2710/06

  Combustion engines, Gas turbines · CPC title

• B60W20/16 Primary

  for reducing engine exhaust emissions · CPC title