Internal combustion engine system, power output apparatus, vehicle, and method for controlling the internal combustion engine system

• US 20080110439A1
• Filed: 10/19/2007
• Published: 05/15/2008
• Est. Priority Date: 11/10/2006
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Sugimoto, Hitoki
• Granted Patent: US 7,806,211 B2
• Time in Patent Office: Days
• US Class Current: 123/478
• CPC Class Codes: B60K 1/02 comprising more than one electric motor
• CPC Class Codes: B60K 6/365 with the gears having orbital motion
• CPC Class Codes: B60K 6/40 characterised by the assembly or relative disposition of components
• CPC Class Codes: B60K 6/445 Differential gearing distribution type
• CPC Class Codes: B60K 6/547 the transmission being a stepped gearing
• CPC Class Codes: B60L 2260/12 of combustion engines
• CPC Class Codes: B60W 10/06 including control of combustion engines
• CPC Class Codes: B60W 20/00 Control systems specially adapted for hybrid vehicles hybrid vehicle design, B60K6/00; electric vehicles B60L
• CPC Class Codes: B60W 2510/0609 Throttle change rate
• CPC Class Codes: B60W 2710/0616 Position of fuel or air injector
• CPC Class Codes: F02D 13/0203 Variable control of intake and exhaust valves
• CPC Class Codes: F02D 13/0234 changing the valve timing only
• CPC Class Codes: F02D 2041/001 for engines with variable valve actuation
• CPC Class Codes: F02D 2041/0265 to decrease temperature of the exhaust gas treating apparatus
• CPC Class Codes: F02D 2250/18 Control of the engine output torque
• CPC Class Codes: F02D 41/0002 Controlling intake air
• CPC Class Codes: F02D 41/0235 in relation with the state of the exhaust gas treating apparatus control of exhaust gas treating apparatus per se F01N
• CPC Class Codes: F02D 41/34 with means for controlling injection timing or duration
• CPC Class Codes: F16H 2037/0866 Power split variators with distributing differentials, with the output of the CVT connected or connectable to the output shaft
• CPC Class Codes: Y02T 10/12 Improving ICE efficiencies
• CPC Class Codes: Y02T 10/40 : Engine management systems
• CPC Class Codes: Y02T 10/62 : Hybrid vehicles

Abstract

When a catalyst temperature θc is higher than a threshold value θref (S320), an increase coefficient Kf is set so as to tend to be larger as opening and closing timing of an intake valve is advanced, an intake air flow Qa is larger, and a rotation speed Ne of the engine 22 becomes higher (S340), a target fuel injection quantity Qf* is set based on a product of a basic fuel injection quantity Qftmp set based on the intake air flow Qa and an increase coefficient Kf (S350), and fuel injection of the set target fuel injection quantity Qf* is performed (S360).

Claims

1. An internal combustion engine system having an opening and closing timing changing module capable of changing opening and closing timing of an intake valve of an internal combustion engine, said internal combustion engine system comprising:

a fuel injection module capable of injecting a fuel to each cylinder of said internal combustion engine;

an advance angle instruction module which performs an advance angle instruction for advancing opening and closing timing of said intake valve when predetermined high torque demand is made based on an operation of an operator;

an opening and closing timing control module which controls said opening and closing timing changing module so that said intake valve is opened and closed in target opening and closing timing based on an operation state of said internal combustion engine and presence or absence of an advance angle instruction by said advance angle instruction module;

a target fuel injection quantity setting module which sets a target fuel injection quantity based on target power to be output from said internal combustion engine and presence or absence of the advance angle instruction by said advance angle instruction module; and

a fuel injection control module which controls said fuel injection module so that fuel injection is performed based on said set target fuel injection quantity.

2. An internal combustion engine system according to claim 1,

said internal combustion engine system further comprising an exhaust gas purifier including a catalyst for purifying exhaust gas from said internal combustion engine,

wherein said target fuel injection quantity setting module is a module which sets said target fuel injection quantity based on said target power and presence or absence of an advance angle instruction by said advance angle instruction module when a temperature of said catalyst is higher than a predetermined temperature.

3. An internal combustion engine system according to claim 1,

wherein said target fuel injection quantity setting module is a module which sets said target fuel injection quantity based on a basic fuel injection quantity set based on said target power and a predetermined constraint, and a correction value set based on presence or absence of an advance angle instruction by said advance angle instruction module.

4. An internal combustion engine system according to claim 3,

wherein said target fuel injection quantity setting module is a module which sets said target fuel injection quantity based on a product of said basic fuel injection quantity, and a correction value for which a larger value is set when an advance angle instruction by said advance angle instruction module is performed than when the advance angle instruction is not performed.

5. An internal combustion engine system according to claim 3,

wherein said target fuel injection quantity setting module is a module which sets said target fuel injection quantity by using said correction value which is set based on presence or absence of an advance angle instruction by said advance angle instruction module, a rotation speed of said internal combustion engine, and an intake air flow of said internal combustion engine.

6. An internal combustion engine system according to claim 5,

wherein said target fuel injection quantity setting module is a module which sets said target fuel injection quantity based on a product of said basic fuel injection quantity and said correction value for which a larger value is set as the rotation speed of said internal combustion engine is higher and as the intake air flow of said internal combustion engine is larger.

7. An internal combustion engine system having an opening and closing timing changing module capable of changing opening and closing timing of an intake valve of an internal combustion engine, said internal combustion engine system comprising:

a fuel injection module capable of injecting a fuel to each cylinder of said internal combustion engine;

a target fuel injection quantity setting module which sets a target fuel injection quantity based on target power to be output from said internal combustion engine and opening and closing timing of said intake valve; and

a fuel injection control module which controls said fuel injection module so that fuel injection is performed based on said set target fuel injection quantity.

8. An internal combustion engine system according to claim 7,

said internal combustion engine system further comprising an exhaust gas purifier including a catalyst for purifying exhaust gas from said internal combustion engine,

wherein said target fuel injection quantity setting module is a module which sets said target fuel injection quantity based on said target power and the opening and closing timing of said intake valve, when a temperature of said catalyst is higher than a predetermined temperature.

9. An internal combustion engine system according to claim 7,

said internal combustion engine system further comprising an opening and closing timing control module which controls said opening and closing timing changing module so that the opening and closing timing of said intake valve is at an advance angle side when predetermined high torque demand is made based on an operation of an operator as compared when the predetermined high torque demand is not made.

10. An internal combustion engine system according to claim 7,

wherein said target fuel injection quantity setting module is a module which sets said target fuel injection quantity based on a basic fuel injection quantity which is set based on said target power and a predetermined constraint, and a correction value which is set based on the opening and closing timing of said intake valve.

11. An internal combustion engine system according to claim 10,

wherein said target fuel injection quantity setting module is a module which sets said target fuel injection quantity based on a product of said basic fuel injection quantity and a correction value for which a larger value is set as the opening and closing timing of said intake valve is toward an advance angle side in a range it can take.

12. An internal combustion engine system according to claim 10,

wherein said target fuel injection quantity setting module is a module which sets said target fuel injection quantity by using said correction value which is set based on the opening and closing timing of said intake valve, a rotation speed of said internal combustion engine and an intake air flow of said internal combustion engine.

13. An internal combustion engine system according to claim 12,

wherein said target fuel injection quantity setting module is a module which sets said target fuel injection quantity based on a product of said basic fuel injection quantity and said correction value for which a larger value is set as the rotation speed of said internal combustion engine is higher and as the intake air flow of said internal combustion engine is larger.

14. A vehicle, comprising:

an internal combustion engine;

an opening and closing timing changing module capable of changing opening and closing timing of an intake valve of said internal combustion engine;

a fuel injection module capable of injecting a fuel to each cylinder of said internal combustion engine;

a rotation regulating module which is connected to an output shaft of said internal combustion engine, and a drive shaft independently rotatable with respect to the output shaft and connected to an axle, and capable of regulating a rotation speed of said output shaft with respect to said drive shaft with input and output of electric power and input and output of drive force to and from said output shaft and said drive shaft;

a motor capable of inputting and outputting power to and from said drive shaft;

an advance angle instruction module which performs an advance angle instruction to advance opening and closing timing of said intake valve when predetermined high torque demand is made based on an operation of an operator;

an opening and closing timing control module which controls said opening and closing timing changing module so that said intake valve is opened and closed in target opening and closing timing based on the operation state of said internal combustion engine and presence or absence of the advance angle instruction by said advance angle instruction module;

a target fuel injection quantity setting module which sets a target fuel injection quantity based on target power to be output from said internal combustion engine and presence or absence of an advance angle instruction by said advance angle instruction module; and

a fuel injection control module which controls said fuel injection module so that fuel injection is performed based on said set target fuel injection quantity.

15. A vehicle according to claim 14,

wherein said rotation regulating module is a module including a three shaft-type power input output module which is connected to three shafts that are the output shaft of said internal combustion engine, said power shaft and a third shaft, and inputs and outputs power to and from a remaining shaft based on power input and output to and from any two shafts among the three shafts, and a generator capable of inputting and outputting power to and from said third shaft.

16. A vehicle, comprising:

an internal combustion engine;

an opening and closing timing changing module capable of changing opening and closing timing of an intake valve of said internal combustion engine;

a fuel injection module capable of injecting a fuel to each cylinder of said internal combustion engine;

a rotation regulating module which is connected to an output shaft of said internal combustion engine and a drive shaft independently rotatable with respect to the output shaft and connected to an axle, and capable of regulating a rotation speed of said output shaft with respect to said drive shaft with input and output of electric power and input and output of drive force to and from said output shaft and said drive shaft;

a motor capable of inputting and outputting power to and from said drive shaft;

a target fuel injection quantity setting module which sets a target fuel injection quantity based on target power to be output from said internal combustion engine and opening and closing timing of said intake valve; and

a fuel injection control module which controls said fuel injection module so that fuel injection is performed based on said set target fuel injection quantity.

17. A vehicle according to claim 16,

wherein said rotation regulating module is a module including a three shaft-type power input output module which is connected to three shafts that are the output shaft of said internal combustion engine, said power shaft and a third shaft, and inputs and outputs power to and from a remaining shaft based on power input and output to and from any two shafts among the three shafts, and a generator capable of inputting and outputting power to and from said third shaft.

18. A method for controlling an internal combustion engine system including an opening and closing timing changing module capable of changing opening and closing timing of an intake valve of an internal combustion engine, and a fuel injection module capable of injecting a fuel to each cylinder of said internal combustion engine, said method comprising:

performing an advance angle instruction for advancing opening and closing timing of said intake valve when predetermined high torque demand is made based on an operation of an operator;

controlling said opening and closing timing changing module so that said intake valve is opened and closed in target opening and closing timing based on an operation state of said internal combustion engine and presence or absence of said advance angle instruction; and

controlling said fuel injection module so that a target fuel injection quantity is set based on target power to be output from said internal combustion engine and presence or absence of said advance angle instruction, and fuel injection is performed based on the set target fuel injection quantity.

19. A method for controlling an internal combustion engine system including an opening and closing timing changing module capable of changing opening and closing timing of an intake valve of an internal combustion engine, and a fuel injection module capable of injecting a fuel to each cylinder of said internal combustion engine, said method comprising:

setting a target fuel injection quantity based on target power to be output from said internal combustion engine and opening and closing timing of said intake valve, and controlling said fuel injection module so that fuel injection is performed based on the set target fuel injection quantity.