Engine starting device and engine starting method

Patent metadata

Field	Value
Publication number	US-9631596-B2
Application number	US-201314396819-A
Country	US
Kind code	B2
Filing date	Mar 19, 2013
Priority date	Jun 14, 2012
Publication date	Apr 25, 2017
Grant date	Apr 25, 2017

Abstract

The engine starting device for stopping, when an engine automatic stop condition is satisfied, fuel injection to the engine to automatically stop the engine, and for thereafter restarting the engine when an engine restart condition is satisfied, includes: a ring gear coupled to a crankshaft of the engine; a starter motor rotated by a current supply; a pinion gear for transmitting the rotation of the starter motor to the ring gear; a pinion gear moving part for moving the pinion gear toward the ring gear by a current supply, thereby meshing the pinion gear with the ring gear; and a fuel injection control part for restarting the fuel injection so that combustion is generated in a predetermined compression cylinder after the engine restart condition is satisfied and after the pinion gear moving part starts the movement of the pinion gear.

First claim

The invention claimed is:

1. An engine starting device for stopping, when an engine automatic stop condition is satisfied, fuel injection to an engine to automatically stop the engine, and for thereafter restarting the engine when an engine restart condition is satisfied,
the engine starting device comprising:
a ring gear coupled to a crankshaft of the engine;
a starter motor rotated by a current supply;
a pinion gear for transmitting the rotation of the starter motor to the ring gear;
a pinion gear moving part for moving the pinion gear toward the ring gear by another current supply, thereby meshing the pinion gear with the ring gear; and
a fuel injection controller restarting the fuel injection at the same time the pinion gear moving part starts the movement of the pinion gear toward the ring gear so that combustion is generated in a predetermined compression cylinder after the engine restart condition is satisfied and after the pinion gear moving part starts the movement of the pinion gear.

2. An engine starting device according to claim 1 , wherein the predetermined compression cylinder is a first compression cylinder after completion of the meshing between the pinion gear and the ring gear.

3. An engine starting device according to claim 1 , further comprising a rotation speed estimation part for estimating an engine rotation speed at the predetermined compression cylinder
wherein the predetermined compression cylinder is a first compression cylinder after the engine rotation speed estimated by the rotation speed estimation part becomes equal to or more than a predetermined rotation speed.

4. An engine starting device according to claim 3 , wherein the rotation speed estimation part estimates the engine rotation speed before 90 degrees before top dead center at each cylinder of the engine.

5. An engine starting device according to claim 1 , wherein the fuel injection controller restarts the fuel injection after the engine restart condition is satisfied and before the pinion gear moving part starts the movement of the pinion gear.

6. An engine starting device according to claim 2 , wherein the fuel injection controller restarts the fuel injection after the engine restart condition is satisfied and before the pinion gear moving part starts the movement of the pinion gear.

7. An engine starting device according to claim 3 , wherein the fuel injection controller restarts the fuel injection after the engine restart condition is satisfied and before the pinion gear moving part starts the movement of the pinion gear.

8. An engine starting device according to claim 4 , wherein the fuel injection controller restarts the fuel injection after the engine restart condition is satisfied and before the pinion gear moving part starts the movement of the pinion gear.

9. An engine starting device according to claim 1 , further comprising:
an ignition coil; and
an ignition timing control part for controlling an ignition timing of the ignition coil,
wherein the ignition timing control part sets ignition of the predetermined compression cylinder after a top dead center.

10. An engine starting device according to claim 2 , further comprising:
an ignition coil; and
an ignition timing control part for controlling an ignition timing of the ignition coil,
wherein the ignition timing control part sets ignition of the predetermined compression cylinder after a top dead center.

11. An engine starting device according to claim 3 , further comprising:
an ignition coil; and
an ignition timing control part for controlling an ignition timing of the ignition coil,
wherein the ignition timing control part sets ignition of the predetermined compression cylinder after a top dead center.

12. An engine starting device according to claim 4 , further comprising:
an ignition coil; and
an ignition timing control part for controlling an ignition timing of the ignition coil,
wherein the ignition timing control part sets ignition of the predetermined compression cylinder after a top dead center.

13. An engine starting device according to claim 1 , further comprising:
an ignition coil; and
an ignition preparation part for charging the ignition coil with a voltage,
wherein the ignition preparation part starts the voltage charge to the ignition coil after a top dead center.

14. An engine starting device according to claim 2 , further comprising:
an ignition coil; and
an ignition preparation part for charging the ignition coil with a voltage,
wherein the ignition preparation part starts the voltage charge to the ignition coil after a top dead center.

15. An engine starting device according to claim 3 , further comprising:
an ignition coil; and
an ignition preparation part for charging the ignition coil with a voltage,
wherein the ignition preparation part starts the voltage charge to the ignition coil after a top dead center.

16. An engine starting device according to claim 4 , further comprising:
an ignition coil; and
an ignition preparation part for charging the ignition coil with a voltage,
wherein the ignition preparation part starts the voltage charge to the ignition coil after a top dead center.

17. An engine starting device according to claim 1 , wherein when the engine restart condition is satisfied during an inertial rotation of the engine caused by the stop of the fuel injection to the engine, the current supply to the starter motor is started based on at least an engine rotation speed after the movement of the pinion gear is started by the pinion gear moving part.

18. An engine starting device according to claim 2 , wherein when the engine restart condition is satisfied during an inertial rotation of the engine caused by the stop of the fuel injection to the engine, the current supply to the starter motor is started based on at least an engine rotation speed after the movement of the pinion gear is started by the pinion gear moving part.

19. An engine starting device according to claim 3 , wherein when the engine restart condition is satisfied during an inertial rotation of the engine caused by the stop of the fuel injection to the engine, the current supply to the starter motor is started based on at least an engine rotation speed after the movement of the pinion gear is started by the pinion gear moving part.

20. An engine starting device according to claim 4 , wherein when the engine restart condition is satisfied during an inertial rotation of the engine caused by the stop of the fuel injection to the engine, the current supply to the starter motor is started based on at least an engine rotation speed after the movement of the pinion gear is started by the pinion gear moving part.

21. An engine starting method carried out by an engine starting device for stopping, when an engine automatic stop condition is satisfied, fuel injection to an engine to automatically stop the engine, and for thereafter restarting the engine when an engine restart condition is satisfied,
the engine starting device comprising:
a ring gear coupled to a crankshaft of the engine;
a starter motor rotated by a current supply;
a pinion gear for transmitting the rotation of the starter motor to the ring gear; and
a pinion gear moving part for moving the pinion gear toward the ring gear by a current supply, thereby meshing the pinion gear with the ring gear,
the engine starting method comprising a fuel injection control step of restarting the fuel injection at the same time the pinion gear moving part sta

Assignees

• Kitano Hiroaki
• Mizuno Daisuke
• Ishikawa Osamu
• Okabe Takeru
• Kamei Koichiro
• Mitsubishi Electric Corp

Inventors

• Kitano Hiroaki
• Mizuno Daisuke
• Ishikawa Osamu
• Okabe Takeru
• Kamei Koichiro

Classifications

• F02N2300/2002

  using different starting modes, methods, or actuators depending on circumstances, e.g. engine temperature or component wear · CPC title

• F02N15/067

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

• Y02T10/48

  Cross-Sectional Technologies · mapped topic

• F02N11/0855

  during engine shutdown or after engine stop before start command, e.g. pre-engagement of pinion · CPC title

• F02N11/0818 Primary

  Conditions for starting or stopping the engine or for deactivating the idle-start-stop mode · CPC title