Vehicle control system

• US 9,002,578 B2
• Filed: 07/20/2011
• Issued: 04/07/2015
• Est. Priority Date: 07/20/2011
• Status: Expired due to Fees

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Itabashi, Kaiji, Tanahashi, Toshio, Takeuchi, Keisuke, Kawasaki, Tomohide, Noumura, Shin, Agata, Yoshimitsu
• Primary Examiner(s): Amin, Bhavesh V
• Application Number:
  US13/575,977
• Publication Number:
  US 20140207334A1
• Time in Patent Office: 1,357 Days
• US Class Current: 701/37
• CPC Class Codes: B60W 10/00 Conjoint control of vehicle sub-units of different type or different function for propulsion of purely electrically-propelled vehicles with power supplied within the vehicle B60L50/00 - B60L58/00
• CPC Class Codes: B60W 10/04 including control of propulsion units
• CPC Class Codes: B60W 10/11 Stepped gearings
• CPC Class Codes: B60W 10/20 including control of steering systems
• CPC Class Codes: B60W 10/22 including control of suspension systems
• CPC Class Codes: B60W 2050/0022 Gains, weighting coefficients or weighting functions
• CPC Class Codes: B60W 2520/105 Longitudinal acceleration
• CPC Class Codes: B60W 2520/125 Lateral acceleration
• CPC Class Codes: B60W 2540/10 Accelerator pedal position
• CPC Class Codes: B60W 40/09 Driving style or behaviour
• CPC Class Codes: B60W 40/10 related to vehicle motion
• CPC Class Codes: B60W 50/082 Selecting or switching between different modes of propelling
• CPC Class Codes: F16H 2059/003 Detecting or using driving style of a driver, e.g. for adapting shift schedules
• CPC Class Codes: F16H 59/48 Inputs being a function of acceleration
• CPC Class Codes: F16H 61/10 Controlling shift hysteresis

Abstract

A vehicle control system configured to judge a vehicle behavior or a driving preference of a driver based on acceleration of the vehicle including at least longitudinal acceleration. An acceleration value used in the judgment is obtained on the basis of a weighted detection value of the actual longitudinal acceleration of the vehicle, and a weighted parameter which is varied by an operation to increase a driving force of the vehicle executed by the driver. A weight on the parameter is reduced in case a weight on the detection value of the longitudinal acceleration is increased, and the weight on the parameter is increased in case the weight on the detection value of the longitudinal acceleration is reduced.

Claims

1. A vehicle control system, which is configured to calculate an acceleration value used to judge a vehicle behavior and to judge a driving preference of a driver based on the calculated acceleration value, comprising:

a calculator that is configured to calculate the acceleration value on the basis of;

a parameter including at least any one of;

(i) a ratio of the actual longitudinal acceleration of the vehicle to a maximum longitudinal acceleration possible to be established at a moment when the longitudinal acceleration is calculated,

(ii) a ratio of a depression amount of the accelerator pedal to establish the actual acceleration to a maximum depression amount of the accelerator pedal, and

(iii) a ratio of a target longitudinal acceleration calculated based on the depression amount of the accelerator pedal to the maximum longitudinal acceleration possible to be established at a moment when the target longitudinal acceleration is calculated, and

an actual longitudinal acceleration; and

a corrector that is configured to;

carry out a first correction when the longitudinal acceleration of the vehicle is easy to be established, wherein the first correction comprises;

correcting the parameter by reducing the acceleration value to be smaller than the acceleration value when the longitudinal acceleration of the vehicle is difficult to be established, and

correcting the actual longitudinal acceleration by increasing the acceleration value to be larger than the acceleration value when the longitudinal acceleration of the vehicle is difficult to be established; and

carry out a second correction when the longitudinal acceleration of the vehicle is difficult to be established, wherein the second correction comprises;

correcting the parameter by increasing the acceleration value to be larger than the acceleration value when the longitudinal acceleration of the vehicle is easy to be established, and

correcting the actual longitudinal acceleration by reducing the acceleration value to be smaller than the acceleration value when the longitudinal acceleration of the vehicle is easy to be established.

2. The vehicle control system as claimed in claim 1, wherein

the longitudinal acceleration of the vehicle is easy to be established when the vehicle speed is slower than a predetermined speed, and

the longitudinal acceleration of the vehicle is difficult to be established when the vehicle speed is faster than a predetermined speed.

3. The vehicle control system as claimed in claim 1, further comprising:

a controller that controls at least one of characteristics of a speed change, a driving force, a steering, and a suspension, based on the acceleration value.

4. The vehicle control system as claimed in claim 1, wherein the parameter is normalized within a tire friction circle of the vehicle.