Methods and systems for assisted direct start control
First Claim
Patent Images
1. A vehicle control method, comprising,selectively deactivating an engine during engine idle-stop conditions;
- engaging an engine starter gear, without applying a starter current, to the deactivated rotating engine after an engine speed drops below a threshold speed; and
with the starter gear engaged, adjusting a starter motor switch to apply a starter braking torque to the rotating engine at advanced timing for higher engine speed and retarded timing for lower engine speed.
1 Assignment
0 Petitions
Accused Products
Abstract
Methods and systems are provided for controlling a vehicle system including an engine that is selectively deactivated during engine idle-stop conditions. One example method includes, during a first condition, engaging an engine starter, without applying a starter current, to the deactivated rotating engine after the engine speed drops below a threshold speed. The method further includes, during a second condition, engaging the starter and adjusting a starter motor switch to apply a starter braking torque to the rotating engine.
51 Citations
18 Claims
-
1. A vehicle control method, comprising,
selectively deactivating an engine during engine idle-stop conditions; -
engaging an engine starter gear, without applying a starter current, to the deactivated rotating engine after an engine speed drops below a threshold speed; and with the starter gear engaged, adjusting a starter motor switch to apply a starter braking torque to the rotating engine at advanced timing for higher engine speed and retarded timing for lower engine speed. - View Dependent Claims (2)
-
-
3. A vehicle control method, comprising,
selectively deactivating an engine during engine idle-stop conditions; -
engaging an engine starter gear, without applying a starter current, to the deactivated rotating engine after an engine speed drops below a threshold speed; and with the starter gear engaged, adjusting a starter motor switch to apply a starter braking torque to the rotating engine at a selected timing based on engine speed, the adjustment including increasing an amount of braking torque and advancing a timing of braking torque when the engine speed at starter engagement is higher; and
decreasing an amount of braking torque and retarding a timing of braking torque when the engine speed at starter engagement is lower. - View Dependent Claims (4, 5, 6, 7)
-
-
8. A method of controlling a vehicle system with an engine, comprising:
-
selectively deactivating the engine during engine idle-stop conditions; during a first condition, engaging an engine starter, without applying a starter current, to the deactivated rotating engine after an engine speed drops below a threshold speed; and during a second condition, engaging the starter and adjusting a starter motor switch to apply a starter braking torque to the deactivated rotating engine at a selected timing, the adjustment including advancing a timing of braking torque application towards starter engagement when the engine speed at starter engagement is higher, and retarding the timing away from starter engagement when the engine speed at starter engagement is lower. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
-
Specification