Engine starter unit

Patent metadata

Field	Value
Publication number	US-9745944-B2
Application number	US-201514656081-A
Country	US
Kind code	B2
Filing date	Mar 12, 2015
Priority date	Mar 12, 2014
Publication date	Aug 29, 2017
Grant date	Aug 29, 2017

Abstract

An engine starter unit for starting an engine, includes a starter, a first controller, and a prohibiting means. The starter includes a motor generating a rotary force and a pinion transmitting the rotary force generated by the motor to the engine, the starter cranking the engine up to an engine speed of 450 rpm or more in a drive ON state. The first controller turns the starter into the drive ON state to make the starter start cranking in response to an ON operation of an ignition switch by a user. The prohibiting means prohibits the starter from being turned into the drive ON state again in response to another ON operation of the ignition switch for a prohibition duration after the first ON operation by the user.

First claim

The invention claimed is:

1. An engine starter unit for starting an engine, comprising:
a starter that includes a motor generating a rotary force and a pinion transmitting the rotary force generated by the motor to the engine, the starter cranking the engine up to an engine speed of 450 rpm or more in a drive ON state; and
a controller that:
turns the starter into the drive ON state to make the starter start cranking in response to a first ON operation of an ignition switch;
turns off the starter into a drive OFF state to stop the cranking when the engine is cranked up to the engine speed of 450 rpm or more;
determines whether a second ON operation of the ignition switch is performed;
determines whether a predetermined prohibition duration has elapsed since the stop of the cranking when it is determined that the second ON operation is performed; and
prohibits the starter from being shifted to the drive ON state in response to the second ON operation of the ignition switch when it is determined that the predetermined prohibition duration has not elapsed since the stop of the cranking.

2. The engine starter unit according to claim 1 , wherein
the predetermined prohibition duration is set longer as a cranking time of the cranking in response to the first ON operation decreases.

3. The engine starter unit according to claim 1 , wherein
the predetermined prohibition duration starts from a start time of the cranking in response to the first ON operation or from an end time of the cranking in response to the first ON operation.

4. An engine starter unit for a vehicle automatically stopping and restarting an engine, comprising:
a starter that includes a motor generating a rotary force and a pinion transmitting the rotary force generated by the motor to the engine, the starter cranking the engine up to an engine speed of 450 rpm or more in a drive ON state; and
a controller that:
turns the starter into the drive ON state to make the starter start cranking in response to a restart requirement for the engine;
turns off the starter into a drive OFF state to stop the cranking when the engine is cranked up to the engine speed of 450 rpm or more;
determines whether an ON operation of the ignition switch is performed;
determines whether a predetermined prohibition duration has elapsed since the stop of the cranking when it is determined that the operation is performed; and
prohibits the starter from being shifted to the drive ON state in response to the ON operation of the ignition switch when it is determined that the predetermined prohibition duration has not elapsed since the stop of the cranking.

5. The engine starter unit according to claim 4 , wherein
the predetermined prohibition duration is set longer as a cranking time of the cranking in response to the first ON operation decreases.

6. The engine starter unit according to claim 4 , wherein
the predetermined prohibition duration starts from a start time of the cranking in response to the restart requirement or from an end time of the cranking in response to the restart requirement.

Assignees

• Denso Corp

Inventors

• Fujita Tatsuya

Classifications

• F02N11/105 Primary

  when the engine is already running (F02N11/0848 takes precedence) · CPC title

• F02N2300/2011

  Control involving a delay; Control involving a waiting period before engine stop or engine start · CPC title

• F02N15/067

  the starter comprising an electro-magnetically actuated lever · CPC title

• F02N2200/102

  Brake pedal position · CPC title

• F02N11/0848

  with means for detecting successful engine start, e.g. to stop starter actuation · CPC title