Automatic engine stop and restart system for vehicle
First Claim
Patent Images
1. A vehicle comprising:
- an engine;
a motor for starting the engine;
an automatic transmission connected with the engine and the motor, for receiving input rotation from the engine and the motor and providing output rotation to drive the vehicle;
a sensing device for sensing a vehicle operating condition; and
a controller for performing an automatic engine stop operation for automatically stopping the engine and an automatic engine restart operation for automatically restarting the engine in accordance with the vehicle operating condition, for producing an engine restart request signal to request a restart of the engine during the automatic engine stop operation, for determining a target engine speed for the automatic engine restart operation, and for performing the automatic engine restart operation, in response to the engine restart request signal, by driving the motor in accordance with the target speed while holding a transmission state of the automatic transmission unchanged.
1 Assignment
0 Petitions
Accused Products
Abstract
An automatic engine stop and restart system includes an engine, a starting motor, a transmission, a vehicle operating condition sensor and a controller. The controller monitors the vehicle operating condition to produce an automatic engine restart request signal during an automatic engine stop operation, calculates a target engine speed for the automatic engine restart operation, and drives the motor in accordance with the target speed to perform the automatic engine restart operation in response to the engine restart request signal. During the automatic engine restart operation, the transmission is held in a drive state or in a non-drive state invariably.
-
Citations
18 Claims
-
1. A vehicle comprising:
-
an engine;
a motor for starting the engine;
an automatic transmission connected with the engine and the motor, for receiving input rotation from the engine and the motor and providing output rotation to drive the vehicle;
a sensing device for sensing a vehicle operating condition; and
a controller for performing an automatic engine stop operation for automatically stopping the engine and an automatic engine restart operation for automatically restarting the engine in accordance with the vehicle operating condition, for producing an engine restart request signal to request a restart of the engine during the automatic engine stop operation, for determining a target engine speed for the automatic engine restart operation, and for performing the automatic engine restart operation, in response to the engine restart request signal, by driving the motor in accordance with the target speed while holding a transmission state of the automatic transmission unchanged. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
-
-
17. An automatic engine stop and restart control apparatus for automatically stopping an engine for a vehicle and automatically restarting the engine with a starting motor, the automatic engine stop and restart control apparatus comprising:
-
means for automatically stopping the engine in a predetermined vehicle situation;
means for producing an automatic restart request signal in accordance with a vehicle operating condition in the predetermined vehicle situation;
means for monitoring a driving condition of an automatic transmission connected with the engine;
means for determining a target engine speed for an automatic engine restart operation in accordance with the driving condition of the automatic transmission; and
means for restarting the engine in response to the automatic engine restart request signal, by controlling the starting motor in accordance with the target engine speed.
-
-
18. An automatic engine stop and restart control process for automatically stopping an engine for a vehicle and automatically restarting the engine with a starting motor, the automatic engine stop and restart control process comprising:
-
putting the engine in an automatic stop state in a predetermined vehicle situation;
producing an automatic restart request signal in accordance with a vehicle operating condition in the predetermined vehicle situation;
detecting a driving condition of an automatic transmission connected with the engine;
determining a target engine speed for an automatic engine restart operation in accordance with the driving condition of the automatic transmission; and
initiating the automatic engine restart operation for restarting the engine in response to the automatic engine restart request signal, by controlling the starting motor in accordance with the target engine speed.
-
Specification