Wheel speed detecting device for vehicle

• US 5,490,070 A
• Filed: 02/01/1993
• Issued: 02/06/1996
• Est. Priority Date: 01/30/1992
• Status: Expired due to Term

• Current Assignee: Honda Giken Kogyo Kabushiki Kaisha (Honda Motor Company)
• Original Assignee: Honda Giken Kogyo Kabushiki Kaisha (Honda Motor Company)
• Inventors: Ikeda, Tooru, Nishihara, Takashi, Mori, Ryoji, Yamamoto, Osamu, Kiryu, Hironobu, Shiraishi, Shuji
• Primary Examiner(s): Chin, Gary
• Application Number:
  US08/012,141
• Time in Patent Office: 1,100 Days
• Field of Search: 364/426.02, 364/426.03, 364/424.05, 364/565, 324/160, 324/161, 324/162, 324/166, 180/197, 303/95, 303/100, 303/103, 303/105
• US Class Current: 701/70
• CPC Class Codes: B60T 8/172 Determining control parameters used in the regulation, e.g. by calculations involving measured or detected parameters B60T8/17551 takes precedence

Abstract

A wheel speed detecting device for a vehicle having wheel speed detectors for detecting left and right wheel speeds, respectively; a turning state detector for detecting the turning state of the vehicle; and a correcting and calculating device for correcting the wheel speeds on the basis of an output from the turning state detector and for calculating a value representative of the left and right wheel speeds on the basis of the corrected wheel speeds. Thus, an error of wheel speeds detected during turning of the vehicle can be compensated for, thereby determining a correct wheel speed.

Claims

1. A wheel speed detecting device for a vehicle having an internal combustion engine with a throttle valve for controlling output torque, said wheel speed detecting device comprising:

an electronic control unit including at least one memory unit, a central processing unit, an input section, and an output section for controlling said throttle valve via a throttle valve driving means;

wheel speed detecting means for detecting at least a left follower wheel speed and a right follower wheel speed;

turning state detecting means for detecting a turning state of the vehicle; and

correcting and calculating means contained in said central processing unit comprising a follower wheel speed average value calculating means for calculating a follower wheel speed average value as a function of said left follower wheel speed and said right follower wheel speed which are input to said input section of said electronic control unit from said wheel speed detecting means, a correction value calculating means for calculating a correction value for said follower wheel speed average value on the basis of an output from said turning state detecting means, and a vehicle speed calculating means for calculating a final wheel speed value as a function of said follower wheel speed average value and said correction value, said final wheel speed value being used to calculate a slip rate;

wherein whenever said slip rate exceeds a predetermined value said electronic control unit drives said throttle valve driving means for controlling said throttle valve to control output torque of said internal combustion engine.

2. A wheel speed detecting device for a vehicle according to claim 1, wherein said turning state detecting means comprises, at least, steering angle detecting means for detecting a steering angle of the vehicle, and lateral acceleration detecting means for detecting a lateral acceleration of the vehicle.

5. A wheel speed detecting device for a vehicle according to claims 1 or 3, wherein said throttle valve driving means comprises a pulse motor.

3. A wheel speed detecting device for a vehicle having an internal combustion engine with a throttle valve for controlling output torque, said wheel speed detecting device comprising:

an electronic control unit including at least one memory unit, a central processing unit, an input section, and an output section for controlling said throttle valve via a throttle valve driving means;

wheel speed detecting means for detecting left and right follower wheel speeds and left and right driven wheel speeds;

turning state detecting means for detecting a turning state of the vehicle; and

correcting and calculating means contained in said central processing unit, comprising a follower wheel speed average value calculating means for calculating a follower wheel speed average value as a function of said left follower wheel speed and said right follower wheel speed which are input to said input section of said electronic control unit from said wheel speed detecting means, an inner and outer wheel speed difference calculating means for calculating an inner and outer wheel speed difference between the left and right driven wheel speeds on the basis of an output from said turning state detecting means which is input to said input section of said electronic control unit, driven-wheel speed correcting means for correcting said left and right driven wheel speeds on the basis of an output from said inner and outer wheel speed difference calculating means, respectively, and higher-speed select means for selecting a larger one of the left and right driven wheel speeds for calculating a final wheel speed when a difference between the left and right driven wheel speeds corrected by said driven-wheel speed correcting means exceeds a first predetermined value, said final wheel speed and said follower wheel speed average value being used to calculate a slip rate,

wherein whenever said slip rate exceeds a second predetermined value said electronic control unit drives said throttle value driving means for controlling said throttle valve to control output torque of said internal combustion engine.

4. A wheel speed detecting device for a vehicle according to claim 3, wherein when said turning state detecting means does not detect the turning state of the vehicle, the correction by said driven-wheel speed correcting means is not carried out, and the left and right driven wheel speeds detected by said driven wheel speed detecting means are inputted directly into said higher-speed select means, and when the difference between the left and right driven wheel speeds exceeds the predetermined value, a larger one of said left and right driven wheel speeds is selected.