Vehicle idling stop system
AssigneeNissan Motor Co., Ltd.
InventorToru Fuse
Life of this patent
Estimating the term…
Abstract
When engine shutdown conditions are satisfied while an engine 1 is running, a controller 10 automatically shuts down the engine 1 (idling stop state). When the engine 1 is automatically shut down and engine restart conditions are satisfied, the engine 1 is driven by a motor 2 and the engine 1 is restarted. At this time it is determined that the vehicle is in a deterioration state when the increase rate of the rotation speed of the engine 1 after starting driving the engine 1 with the motor 2 is low. Thereafter idling stop is prohibited. Furthermore when it is determined that the vehicle is on an up-slope, determination of deterioration state is not performed. The engine 1 is driven by the motor 2 and the engine 1 is immediately restarted.
Claims9
A vehicle idling stop system comprising:
- an engine (1);
- a motor (2) which is connected to the engine (1);
- a torque converter (3a);
- a drive wheel (9) which is connected to either of the engine (1) and the motor (2) via the torque converter (3a) and which is driven by either of the engine (1) and the motor (2);
- and
- a microprocessor (10) which is programmed to:
- determine whether an engine shutdown condition is satisfied when the engine (1) is running,
- shut down the engine (1) when the engine shutdown condition is satisfied,
- determine whether engine restart condition is satisfied when the engine (1) is shut down,
- drive the engine (1) with the motor (2) and determine whether the vehicle is on an up-slope when the engine restart condition is satisfied,
- determine whether an increase rate in the rotation speed of the engine (1) before restarting the engine (1) after start up of driving of the engine (1) with the motor (2) is lower than a predetermined rate when the vehicle is not on an up-slope, and
- prohibit the shutdown of the engine (1) based on the engine shutdown condition when it is determined that the increase rate in the rotation speed of the engine (1) is lower than the predetermined rate.
A vehicle idling stop system comprising:
- an engine (1);
- a motor (2) which is connected to the engine (1);
- a torque converter (3a);
- a drive wheel (9) which is connected to either of the engine (1) and the motor (2) via the torque converter (3a) and which is driven by either of the engine (1) and the motor (2);
- means for detecting whether an engine shutdown condition is satisfied when the engine (1) is running;
- means for shutting down the engine (1) when the engine shutdown condition is satisfied;
- means for determining whether engine restart condition is satisfied when the engine (1) is shut down;
- means for driving the engine (1) with the motor (2) and determining whether the vehicle is on an up-slope when the engine restart condition is satisfied;
- means for determining whether an increase rate in the rotation speed of the engine (1) before restarting the engine (1) after start up of driving of the engine (1) with the motor (2) is lower than a predetermined rate when the vehicle is not on an up-slope;
- and
- means for prohibiting the shutdown of the engine (1) based on the engine shutdown condition when it is determined that the increase rate in the rotation speed of the engine (1) is lower than the predetermined rate.
Dependencies are inferred from the claim text.