Engine starting device with a starter-generator

• US 7,105,944 B2
• Filed: 06/16/2003
• Issued: 09/12/2006
• Est. Priority Date: 06/27/2002
• Status: Active Grant

• Current Assignee: Honda Giken Kogyo Kabushiki Kaisha (Honda Motor Company)
• Original Assignee: Honda Giken Kogyo Kabushiki Kaisha (Honda Motor Company)
• Inventors: Inagawa, Toshinori, Wakitani, Tsutomu
• Primary Examiner(s): Sircus, Brian
• Assistant Examiner(s): DESCHERE, ANDREW M
• Application Number:
  US10/461,368
• Publication Number:
  US 20040000882A1
• Time in Patent Office: 1,184 Days
• Field of Search: 307/153, 318/59, 318/62, 318/63, 318/64, 388/800, 388/825, 123/179.4, 322/29, 322/31
• US Class Current: 307/10.6
• CPC Class Codes: F02N 11/04 the motors being associated with current generators
• CPC Class Codes: F02N 11/0811 using a timer
• CPC Class Codes: F02N 11/0848 with means for detecting successful engine start, e.g. to stop starter actuation
• CPC Class Codes: F02N 19/005 Aiding engine start by starting from a predetermined position, e.g. pre-positioning or reverse rotation
• CPC Class Codes: F02N 2019/007 using inertial reverse rotation

Abstract

A starter motor is prevented from being rotated together with an engine after the start of a engine. When motor speed exceeds the cranking speed after the start of the engine, a speed judging section 36 judges that the starter motor is rotated together with the engine. A current-supply stopping section 38 commands to stop energizing a motor 3a in response to the judge. After the electricity supply is stopped, if the rotation speed is reduced to a value close to the cranking speed, judging section 36 outputs a signal to cancel the current-supply stopping commands from the current-supply stopping section 38. The detection of the motor speed is also continued even after the ignition, and if the speed is further increased, the speed detection is stopped. If the speed is increased to a value showing complete explosion, the speed judging section 36 switches the relays to a generator.

Claims

1. An engine starting device with a starter-generator for an internal combustion engine, wherein the starter-generator is a brushless type and is connected with the engine for starting the engine, comprising:

speed detecting means for detecting rotation speed of the starter-generator based on voltage induced to a stationary winding of the starter-generator;

current-supply stopping means for stopping current-supply to the starter-generator when the rotation speed exceeds a first speed which is previously set as a start judging standard of the engine; and

detection stopping means for stopping a detecting operation of the speed detecting means when the rotation speed exceeds a second speed which is higher than the first speed.

2. The engine starting device for internal combustion engine according to claim 1, further comprising a means for releasing a current-supply stopping state which is set by the current-supply stopping means and for resuming the current-supply to the starter-generator when the rotation speed is reduced equal to or lower than a third speed which is previously set as an ignition failure judging standard after the current-supply is stopped by the current-supply stopping means.

3. The engine starting device for internal combustion engine according to claim 2, wherein the third speed is lower than the first speed.

4. The engine starting device for internal combustion engine according to any one of claims 1 to 3, wherein the starter-generator forms a rotation position signal and a rotation speed signal of a rotor based on a voltage signal which is induced to a winding to which electricity is not supplied when driving electricity is supplied to two phases among three phase stationary windings, and

the speed detecting means detects the rotation speed of the starter-generator based on the rotation speed signal.