Drive force control apparatus of riding vehicle, its control method and riding type vehicle

• US 7,260,471 B2
• Filed: 08/29/2006
• Issued: 08/21/2007
• Est. Priority Date: 08/30/2005
• Status: Active Grant

• Current Assignee: Yamaha Hatsudoki Kabushiki Kaisha (Yamaha Corporation)
• Original Assignee: Yamaha Hatsudoki Kabushiki Kaisha (Yamaha Corporation)
• Inventors: Matsuda, Takeshi, Noborio, Daichi, Akatsuka, Hidenori
• Primary Examiner(s): Vo; Hieu T.
• Application Number:
  US11/468,242
• Publication Number:
  US 20070050125A1
• Time in Patent Office: 357 Days
• Field of Search: 701/114, 701/110, 701/93, 701/97, 701/51, 701/53, 180/206, 180/220, 180/170, 477/906
• US Class Current: 701/114
• CPC Class Codes: F02D 41/1497 With detection of the mechanical response of the engine
• CPC Class Codes: F02D 41/22 Safety or indicating devices for abnormal conditions in air/fuel ratio feedback systems F02D41/1495, in electric control linkage F02D11/107, in purge control systems F02M25/0809
• CPC Class Codes: F02D 41/266 the computer being backed-up or assisted by another circuit, e.g. analogue
• CPC Class Codes: Y10S 477/906 Means detecting or ameliorating the effects of malfunction or potential malfunction

Abstract

An engine (drive force) control apparatus for a motorcycle that prevents a change in vehicle behavior by noise or the like. A control CPU electronically controls injection and ignition of fuel and a throttle valve. An abnormality detecting portion detects an abnormality of the engine control apparatus by a predetermined abnormality detecting period. When the abnormality is detected, primary abnormality processing of the engine control apparatus is executed. When the abnormality is not detected, primary abnormality processing is released and an electronic control at normal time of the engine control apparatus is executed. When an abnormality detecting signal detected by the abnormality detecting portion continues even an elapse of a predetermined abnormality determining time period, primary abnormality processing is shifted to secondary abnormality processing.

Claims

1. A drive force control apparatus for a riding type vehicle comprising:

a drive source; and

an abnormality detecting portion for detecting an abnormality of the drive force control apparatus,

wherein the abnormality detecting portion detects the abnormality of the drive force control apparatus by a predetermined abnormality detecting period,

wherein when the abnormality of the drive force control apparatus is detected by the abnormality detecting portion, a primary abnormality processing of the drive force control apparatus is executed, and when the abnormality is not detected, the primary abnormality processing is released and an electronic control at normal time of the drive force control apparatus is executed, and

when an abnormality detecting signal detected by the abnormality detecting portion continues even after elapse of a predetermined abnormality determining time period, the primary abnormality processing is shifted to a secondary abnormality processing.

2. The drive force control apparatus according to claim 1, wherein the predetermined abnormality detecting period is equal to or smaller than 1/20 of the predetermined abnormality determining time period.

3. The drive force control apparatus according to claim 1, wherein the drive source is an engine, a motor, or a transmission.

4. The drive force control apparatus according to claim 1, wherein the primary abnormality processing includes a same processing as the secondary abnormality processing.

5. A riding type vehicle mounted with the drive force control apparatus of claim 1.

6. A control method of a drive force control apparatus for a riding type vehicle, for controlling a drive force by a drive source mounted to a vehicle, comprising the steps of:

detecting an abnormality of the drive force control apparatus by a predetermined abnormality detecting period;

executing a primary abnormality processing of the drive force control apparatus when the abnormality of the drive force control apparatus is detected, releasing the primary abnormality processing and executing a control at normal time of the drive force control apparatus when the abnormality is not detected; and

shifting the primary abnormality processing to a secondary abnormality processing when a detected abnormality detecting signal continues even after a predetermined abnormality determining time period.

7. The control method of claim 6, wherein the drive source is an engine, a motor, or a transmission.