Motorcycle, device and method for controlling the same and device and method for detecting slip quantity of motorcycle

• US 7,894,970 B2
• Filed: 01/08/2008
• Issued: 02/22/2011
• Est. Priority Date: 01/09/2007
• Status: Active Grant

• Current Assignee: Yamaha Hatsudoki Kabushiki Kaisha (Yamaha Corporation)
• Original Assignee: Yamaha Hatsudoki Kabushiki Kaisha (Yamaha Corporation)
• Inventors: Kinoshita, Tomohiro, Fujita, Hirokazu
• Primary Examiner(s): Keith; Jack
• Assistant Examiner(s): Khatib; Rami
• Application Number:
  US11/971,184
• Publication Number:
  US 20080167784A1
• Time in Patent Office: 1,141 Days
• Field of Search: 701/71, 701/74, 701/79, 701/82, 701/84, 701/90, 180/197, 180/201
• US Class Current: 701/90
• CPC Class Codes: B60K 28/16 responsive to, or preventing, skidding of wheels brake control systems for vehicle drive stability B60T8/1755; arrangements responsive to a speed condition for adjusting wheel braking force B60T8/32; control of vehicle driving stability otherwise than by controlling the propulsion unit only B60W30/02; preventing wheel slippage by reducing power in rail vehicles B61C15/00
• CPC Class Codes: B60W 10/06 including control of combustion engines
• CPC Class Codes: B60W 2510/0604 Throttle position
• CPC Class Codes: B60W 2520/26 Wheel slip
• CPC Class Codes: B60W 2520/263 Slip values between front and rear axle
• CPC Class Codes: B60W 2710/0605 Throttle position
• CPC Class Codes: B60Y 2200/12 Motorcycles, Trikes; Quads; Scooters

Abstract

Traction control for a motorcycle including a driving wheel speed sensor and a driven wheel speed sensor. An ECU controls an engine on the basis of a corrected slip signal obtained by subtracting a low frequency component of a pre-correction slip signal from the pre-correction slip signal. The pre-correction slip signal is obtained by subtracting a speed of a front wheel detected by the driven wheel speed sensor from a speed of a rear wheel detected by the driving wheel speed sensor.

Claims

1. A motorcycle comprising:

a driving source;

a driving wheel driven by the driving source;

a driven wheel;

a control part;

a driving wheel speed sensor for detecting a speed of the driving wheel; and

a driven wheel speed sensor for detecting a speed of the driven wheel,

wherein the control part controls the driving source based on a corrected slip signal obtained by subtracting a low frequency component of a pre-correction slip signal from the pre-correction slip signal calculated based on a speed of the driving wheel detected by the driving wheel speed sensor, and a speed of the driven wheel detected by the driven wheel speed sensor.

2. The motorcycle according to claim 1, wherein the pre-correction slip signal is obtained by subtracting a speed of the driven wheel detected by the driven wheel speed sensor from a speed of the driving wheel detected by the driving wheel speed sensor.

3. The motorcycle according to claim 1, wherein the pre-correction slip signal is obtained by dividing a speed of the driving wheel detected by the driving wheel speed sensor by a speed of the driven wheel detected by the driven wheel speed sensor.

4. The motorcycle according to claim 1, wherein the low frequency component has a frequency equal to or less than 5 Hz.

5. The motorcycle according to claim 1, wherein the control part comprises:

a low-pass filter for taking out the low frequency component from the pre-correction slip signal;

an operation part for outputting a control signal corresponding to the corrected slip signal; and

a driving force adjusting part for controlling the driving source in accordance with the control signal,

wherein the operation part calculates the pre-correction slip signal, outputs the pre-correction slip signal to the low-pass filter and subtracts the low frequency component taken out through the low-pass filter from the pre-correction slip signal to obtain the corrected slip signal.

6. The motorcycle according to claim 1, wherein the control part comprises:

an operation part for outputting a control signal corresponding to the corrected slip signal; and

a driving force adjusting part for controlling the driving source in accordance with the control signal,

wherein the operation part calculates the pre-correction slip signal, takes out the low frequency component from the pre-correction slip signal and subtracts the low frequency component from the pre-correction slip signal to obtain the corrected slip signal.