Engine start-stop control system
First Claim
1. An engine start-stop control system for an automotive vehicle including a battery, an engine having a ring gear, a starter having a motor, a pinion, and a magnet switch having a plunger and a solenoid for driving said pinion to engage said ring gear, said engine start-stop control system, comprising:
- first means for supplying current to said solenoid at 100% duty ratio until a first predetermined time passes; and
second means for supplying current to said solenoid at a duty ratio that changes according to a vehicle condition within a value less than 100% after said first predetermined period passes until a second predetermined period passes.
1 Assignment
0 Petitions
Accused Products
Abstract
An engine start-stop control system for an automotive vehicle includes a first step for supplying current to a solenoid of a magnet switch of a starter at 100% duty ratio until a first predetermined time passes, a second step for supplying current to the solenoid at a duty ratio that is less than 100% after the first predetermined period passes until a second predetermined period passes, and a third step for supplying current to the solenoid at 100% duty ratio after the second predetermined period passes until a third predetermined period passes. Therefore, a pinion of the starter reaches a ring gear of the engine in a short time and engages the ring gear with a moderate impacting shock, thereby preventing the pinion and the ring gear from being damaged.
38 Citations
9 Claims
-
1. An engine start-stop control system for an automotive vehicle including a battery, an engine having a ring gear, a starter having a motor, a pinion, and a magnet switch having a plunger and a solenoid for driving said pinion to engage said ring gear, said engine start-stop control system, comprising:
-
first means for supplying current to said solenoid at 100% duty ratio until a first predetermined time passes; and
second means for supplying current to said solenoid at a duty ratio that changes according to a vehicle condition within a value less than 100% after said first predetermined period passes until a second predetermined period passes. - View Dependent Claims (2, 3, 4, 9)
-
-
5. A method of starting and stopping an engine having a ring gear for an automotive vehicle and a battery by a starter having a motor, a pinion, and a magnet switch having a plunger and a solenoid for driving said pinion to engage said ring gear, said method comprising the steps of:
-
supplying current to said solenoid at 100% duty ratio until a first predetermined time passes; and
supplying current to said solenoid at a duty ratio that changes according to a vehicle condition within a value less than 100% after said first predetermined period passes until a second predetermined period passes. - View Dependent Claims (6, 7, 8)
-
Specification