Output power controlling apparatus and method for internal combustion engine

• US 6,871,133 B2
• Filed: 08/06/2003
• Issued: 03/22/2005
• Est. Priority Date: 08/06/2002
• Status: Active Grant

• Current Assignee: Mitsubishi Jidosha Kogyo Kabushiki Kaisha
• Original Assignee: Mitsubishi Jidosha Kogyo Kabushiki Kaisha
• Inventors: Takeuchi, Tadashi, Choi, Kyoung-gon, Togai, Kazuhide
• Primary Examiner(s): ARGENBRIGHT, TONY MICHAEL
• Application Number:
  US10/635,860
• Publication Number:
  US 20040107034A1
• Time in Patent Office: 594 Days
• Field of Search: 123/350, 123352-355, 123/361, 123/399, 123/406.23, 123102-104, 701/110, 701102-104, 701/111, 180/54.1
• US Class Current: 701/104
• CPC Class Codes: B60K 26/04 of means connecting initiating means or elements to propulsion unit
• CPC Class Codes: B60W 2710/0666 Engine torque
• CPC Class Codes: B60W 2720/106 Longitudinal acceleration
• CPC Class Codes: F02D 11/105 characterised by the function converting demand to actuation, e.g. a map indicating relations between an accelerator pedal position and throttle valve opening or target engine torque
• CPC Class Codes: F02D 2041/1431 the system including an input-output delay
• CPC Class Codes: F02D 2041/1433 using a model or simulation of the system
• CPC Class Codes: F02D 2250/21 during a transition between engine operation modes or states
• CPC Class Codes: F02D 2250/28 Control for reducing torsional vibrations, e.g. at acceleration
• CPC Class Codes: F02D 41/021 Introducing corrections for particular conditions exterior to the engine conjoint control of vehicle sub-units for propelling the vehicle B60W30/18
• CPC Class Codes: F02D 41/10 for acceleration
• CPC Class Codes: F02D 41/1401 characterised by the control or regulation method F02D41/1473, F02D41/1477 take precedence

Abstract

An output power controlling apparatus and a method for reducing vibration caused by accelerating or shifting gearing in a vehicle includes a vibration component prediction section/step for predicting a vibration component to be generated on the vehicle from the target torque correlation value using a predetermined prediction model, and a feedback correction section/step for feedback correcting the target torque correlation value based on the predicted vibration component to suppress vibration.

Claims

1. An output power controlling apparatus for an internal combustion engine, comprising:

an output power adjustment section for controlling output power of the engine based on a target torque correlation value;

a vibration component prediction section for predicting a vibration component to be generated on a vehicle from the target torque correlation value using a predetermined prediction model; and

a feedback correction section for feedback correcting the target torque correlation value based on the vibration component predicted by said vibration component prediction section to suppress the vibration,

wherein said feedback correction section includes a control variation section for setting a control gain based on the vibration component predicted by said vibration component prediction section.

2. The output power controlling apparatus for an internal combustion engine as claimed in claim 1, wherein said control gain variation section sets the control gain to a higher value in response to an increase of the vibration component predicted by said vibration component prediction section.

3. The output power controlling apparatus for an internal combustion engine as claimed in claim 1, wherein the target torque correlation value is calculated based on an accelerator opening.

4. The output power controlling apparatus for an internal combustion engine as claimed in claim 1, wherein the output power adjustment member comprises one of a throttle, an ignition coil, and an injector.

5. An output power controlling apparatus for an internal combustion engine, comprising:

an output power adjustment section for controlling output power of the engine based on a target torque correlation value;

a vibration component prediction section for predicting a vibration component to be generated on a vehicle from the target torque correlation value using a predetermined prediction model; and

a feedback correction section for feedback correcting the target torque correlation value based on the vibration component predicted by said vibration component prediction section to suppress the vibration,

wherein the predetermined prediction model is set based on a transfer function of a second-order lag system.

6. The output power controlling apparatus for an internal combustion engine as claimed in claim 5, wherein, where a target vehicle attenuation coefficient is represented by ζ

′

, an actual vehicle attenuation coefficient by ζ

, a natural frequency set in accordance with a transmission gear ratio by ω

_n, and a Laplace operator by s, the transfer function is calculated in accordance with

1/(s²+2ζ

ω

_ns+ω

_n²)

and a control gain K set by said feedback correction section is calculated in accordance with

K=(ζ

′

−

ζ

)·

2ω

_n.

7. A method of controlling an output power adjustment member of an internal combustion engine based on a target torque correlation value, comprising the steps of:

predicting a vibration component to be generated on a vehicle from the target torque correlation value using a predetermined prediction model; and

feedback correcting the target torque correlation value based on the vibration component predicted by the vibration component prediction step to suppress the vibrations,

wherein the feedback correction step includes the step of setting a control gain variation based on the vibration component predicted by said vibration component prediction section.

8. The method as claimed in claim 7, wherein the control gain variation setting step sets the control gain to a higher value in response to an increase of the vibration component predicted by the vibration component prediction step.

9. The method as claimed in claim 7, wherein the target torque correlation value is calculated based on an accelerator opening.

10. The method as claimed in claim 7, wherein the output power adjustment member comprises one of a throttle, an ignition coil, and an injector.

11. A method of controlling an output power adjustment member of an internal combustion engine based on a target torque correlation value, comprising the steps of:

predicting a vibration component to be generated on a vehicle from the target torque correlation value using a predetermined prediction model; and

feedback correcting the target torque correlation value based on the vibration component predicted by the vibration component prediction step to suppress the vibrations,

wherein the predetermined prediction model is set based on a transfer function of a second-order lag system.

12. The method as claimed in claim 11, wherein, where a target vehicle attenuation coefficient is represented by ζ

′

, an actual vehicle attenuation coefficient by ζ

, a natural frequency set in accordance with a transmission gear ratio by ω

_n, and a Laplace operator by s, the transfer function is calculated in accordance with

1/(s²+2ζ

ω

_ns+ω

_n²)

and a control gain K set by said feedback correction step is calculated in accordance with

K=(ζ

′

−

ζ

)·

2ω

_n.