Toru Kidokoro

6796295, Sep 28, 2004

Nov 5, 2003

10/700568

Toru Kidokoro - Torrance CA
Takuji Matsubara - Yokosuka, JP
Yoshihiko Hyodo - Gotemba, JP

Toyota Jidosha Kabushiki Kaisha - Toyota

F02M 3300

123520

A vapor passage that makes communication between a fuel tank and a canister is provided. A purge passage that makes communication between the canister and an intake passage of an internal combustion engine is provided. A sealing valve that controls a communication state of the vapor passage and a purge VSV that controls a communication state of the purge passage are provided. A tank internal pressure sensor detects tank internal pressure Pt. The purge VSV is controlled to purge evaporated fuel into the intake passage during operation of the internal combustion engine. The sealing valve is opened/closed depending on whether a predetermined purge is performed in an area where the tank internal pressure Pt is positive.

6837224, Jan 4, 2005

Nov 5, 2003

10/700827

Toru Kidokoro - Torrance CA, US
Takuji Matsubara - Yokosuka, JP
Yoshihiko Hyodo - Gotemba, JP

Toyota Jidosha Kabushiki Kaisha - Toyota

F02M 3700

123520

A sealing valve is installed between a fuel tank and a canister. A purge VSV is installed between the canister and an intake path. A pump module unit is installed to introduce a negative pressure into the canister. The negative pressure is introduced into the canister while the purge VSV and sealing valve are closed. An open failure diagnostic check is conducted on the sealing valve in accordance with the prevalent canister side pressure. A close failure diagnostic check is conducted on the sealing valve by making use of a differential pressure that is generated across the sealing valve as a result of the open failure diagnostic check.

6988396, Jan 24, 2006

Nov 5, 2003

10/700690

Takuji Matsubara - Yokosuka, JP
Toru Kidokoro - Torrance CA, US
Yoshihiko Hyodo - Gotemba, JP

Toyota Jidosha Kabushiki Kaisha - Toyota

G01M 19/00

731181

A sealing valve that controls a communication state between a fuel tank and a canister is provided. During stop of an internal combustion engine, the sealing valve is generally closed, and the canister is opened to the atmosphere. The sealing valve is opened when the internal combustion engine is stopped, and differential pressure exceeding a valve opening determination value is generated between tank internal pressure and atmospheric pressure. A change in the tank internal pressure generated between before and after the sealing valve is opened is detected. When the change in the tank internal pressure is below a predetermined determination value, closing failure of the sealing valve is determined.

7043972, May 16, 2006

Nov 5, 2003

10/700669

Takuji Matsubara - Yokosuka, JP
Toru Kidokoro - Torrance CA, US
Yoshihiko Hyodo - Gotemba, JP

Toyota Jidosha Kabushiki Kaisha - Toyota

G01M 15/00

731181

Disclosed is an evaporated fuel treatment device that includes a sealing valve installed between a fuel tank and a canister, a pump module pressure sensor for detecting the pressure on the canister side pressure, and a tank internal pressure sensor for detecting a tank internal pressure. Upon detection of a significant difference between the canister side pressure and tank internal pressure, the device concludes that no open failure exists in the sealing valve.

7082815, Aug 1, 2006

Mar 24, 2006

11/387933

Takuji Matsubara - Yokosuka, JP
Toru Kidokoro - Torrance CA, US
Yoshihiko Hyodo - Gotemba, JP

Toyota Jidosha Kabushiki Kaisha - Toyota

G01M 15/00

731181

Disclosed is an evaporated fuel treatment device that includes a sealing valve installed between a fuel tank and a canister, a pump module pressure sensor for detecting the pressure on the canister side pressure, and a tank internal pressure sensor for detecting a tank internal pressure. Upon detection of a significant difference between the canister side pressure and tank internal pressure, the device concludes that no open failure exists in the sealing valve.

7213450, May 8, 2007

Nov 15, 2005

11/272794

Takuji Matsubara - Yokosuka, JP
Toru Kidokoro - Torrance CA, US
Yoshihiko Hyodo - Gotemba, JP

Toyota Jidosha Kabushiki Kaisha - Toyota-shi

G01M 19/00

731181

A sealing valve that controls a communication state between a fuel tank and a canister is provided. During stop of an internal combustion engine, the sealing valve is generally closed, and the canister is opened to the atmosphere. The sealing valve is opened when the internal combustion engine is stopped, and differential pressure exceeding a valve opening determination value is generated between tank internal pressure and atmospheric pressure. A change in the tank internal pressure generated between before and after the sealing valve is opened is detected. When the change in the tank internal pressure is below a predetermined determination value, closing failure of the sealing valve is determined.

7481101, Jan 27, 2009

Nov 15, 2005

11/272733

Takuji Matsubara - Yokosuka, JP
Toru Kidokoro - Torrance CA, US
Yoshihiko Hyodo - Gotemba, JP

Toyota Jidosha Kabushiki Kaisha - Toyota-shi

F02M 25/08
G01M 15/00
G01M 19/00

7311439

A sealing valve that controls a communication state between a fuel tank and a canister is provided. During stop of an internal combustion engine, the sealing valve is generally closed, and the canister is opened to the atmosphere. The sealing valve is opened when the internal combustion engine is stopped, and differential pressure exceeding a valve opening determination value is generated between tank internal pressure and atmospheric pressure. A change in the tank internal pressure generated between before and after the sealing valve is opened is detected. When the change in the tank internal pressure is below a predetermined determination value, closing failure of the sealing valve is determined.