Automatic engine shutdown apparatus

1. An automatic engine shutdown apparatus for automatically shutting down an engine under a predetermined running or operating condition, comprising:

a vehicle speed sensor for detecting a vehicle speed;

a throttle sensor for detecting a throttle opening;

travel history memory means for storing a travel history of a vehicle; and

engine shutdown control means for automatically shutting down the engine depending on the vehicle speed, the throttle opening, and the travel history.

2. The automatic engine shutdown apparatus according to claim 1 , wherein said travel history represents the number of times that the vehicle stops within a predetermined period of time.

3. The automatic engine shutdown apparatus according to claim 1 , wherein said engine shutdown control means shuts down the engine after elapse of a standby time depending on the travel history since a predetermined engine shutdown condition has been satisfied.

4. The automatic engine shutdown apparatus according to claim 3 , wherein said travel history represents the number of times that the vehicle stops within a predetermined period of time.

5. The automatic engine shutdown apparatus according to claim 3 , wherein said engine shutdown control means increases said standby time as the vehicle stops more frequently.

6. The automatic engine shutdown apparatus according to claim 5 , wherein said travel history represents the number of times that the vehicle stops within a predetermined period of time.

7. The automatic engine shutdown apparatus according to claim 3 , further comprising:

means for storing an initial value with respect to said standby time;

wherein said engine shutdown control means shuts down the engine after elapse of said initial value if information relative to said travel history is short, since the detected vehicle speed and the detected throttle opening have satisfied the predetermined engine shutdown conditions.

8. The automatic engine shutdown apparatus according to claim 7 , wherein said travel history represents the number of times that the vehicle stops within a predetermined period of time.

9. An automatic engine shutdown apparatus for automatically shutting down an engine under a predetermined running or operating condition, the automatic engine shutdown apparatus including power transmitting means for transmitting power of the engine to a drive wheel, comprising:

a starting clutch disposed between said engine and said power transmitting means, for transmitting the power of the engine to said power transmitting means when said engine reaches a predetermined rotational speed;

a vehicle speed sensor for detecting a vehicle speed;

a throttle sensor for detecting a throttle opening;

travel history memory means for storing a travel history of a vehicle; and

engine shutdown control means for automatically shutting down the engine depending on the vehicle speed, the throttle opening, and the travel history.

10. The automatic engine shutdown apparatus according to claim 9 , wherein said travel history represents the number of times that the vehicle stops within a predetermined period of time.

11. The automatic engine shutdown apparatus according to claim 9 , wherein said engine shutdown control means shuts down the engine after elapse of a standby time depending on the travel history since a predetermined engine shutdown condition has been satisfied.

12. The automatic engine shutdown apparatus according to claim 11 , wherein said engine shutdown control means increases said standby time as the vehicle stops more frequently.

13. The automatic engine shutdown apparatus according to claim 11 , further comprising:

means for storing an initial value with respect to said standby time;

wherein said engine shutdown control means shuts down the engine after elapse of said initial value if information relative to said travel history is short, since the detected vehicle speed and the detected throttle opening have satisfied the predetermined engine shutdown condition.

14. A method for automatically shutting down an engine of a vehicle under a predetermined running or operating condition, comprising the steps of:

detecting a speed of the vehicle;

detecting a throttle opening of the vehicle;

detecting and storing the travel history of a vehicle; and

automatically shutting down the engine depending on the vehicle speed, the throttle opening, and the travel history.

15. The method for automatically shutting down an engine according to claim 14 , wherein said travel history represents the number of times that the vehicle stops within a predetermined period of time.

16. The method for automatically shutting down an engine according to claim 14 , wherein the step of automatically shutting down the engine includes shutting down the engine after elapse of a standby time depending on the travel history since a predetermined engine shutdown condition has been satisfied.

17. The method for automatically shutting down an engine according to claim 16 , wherein the step of automatically shutting down the engine includes increasing said standby time as the vehicle stops more frequently.

18. The method for automatically shutting down an engine according to claim 16 , further comprising the steps of:

storing an initial value with respect to said standby time; and

shutting down the engine after elapse of said initial value if information relative to said travel history is short, since the detected vehicle speed and the detected throttle opening have satisfied the predetermined engine shutdown condition.