System for controlling internal combustion engine performance in accordance with driver behavior

• US 5,954,617 A
• Filed: 01/31/1997
• Issued: 09/21/1999
• Est. Priority Date: 01/31/1997
• Status: Expired due to Term

• Current Assignee: Cummins Incorporated
• Original Assignee: Cummins Incorporated
• Inventors: Horgan, Matthew J., Hapka, Roger J.
• Primary Examiner(s): Marmor, Charles A
• Assistant Examiner(s): Estremsky, Sherry Lynn
• Application Number:
  US08/792,488
• Time in Patent Office: 963 Days
• Field of Search: 477/107, 477/108, 477/110, 477/111, 123/349, 123/350, 123/352
• US Class Current: 477/107
• CPC Class Codes: B60K 31/047 the memory being digital
• CPC Class Codes: B60W 2510/1005 Transmission ratio engaged
• CPC Class Codes: B60W 2540/30 Driving style
• CPC Class Codes: B60W 2710/065 Idle condition
• CPC Class Codes: B60W 2710/0677 Engine power
• CPC Class Codes: F02D 41/021 Introducing corrections for particular conditions exterior to the engine conjoint control of vehicle sub-units for propelling the vehicle B60W30/18
• CPC Class Codes: F16H 63/40 comprising signals other than signals for actuating the final output mechanisms
• CPC Class Codes: Y02T 10/40 Engine management systems

Abstract

A system for controlling internal combustion engine performance in accordance with driver behavior includes a vehicle control computer operable to receive a plurality of vehicle operating parameter signals and control engine fueling based thereon. In accordance with an operational status, or an operational state determined over a predefined time interval, of one or more of the vehicle operating parameter signals, the system is operable to control available engine performance. Both the operational status and operational state of the various vehicle operating parameters are the result of the manner in which the driver operates the vehicle. The control system of the present invention is thus operable to reward/penalize driver performance by correspondingly adding/subtracting available engine performance in the form of available engine output power and/or available vehicle speed. Preferably, subtracting available engine performance occurs automatically, and adding available engine performance may be either done automatically or according to driver demand.

Claims

1. A system for controlling internal combustion engine performance in a motor vehicle, comprising:

means for receiving input data signals which represent a vehicle operating parameter and a functional relationship between said vehicle operating parameter and an engine performance parameter;

means for monitoring the value of said vehicle operating parameter; and

means for adjusting said engine performance parameter based on said monitored vehicle operating parameter value according to said functional relationship.

2. The system of claim 1 wherein said means for adjusting said engine performance parameter includes means for increasing available engine performance if said monitored vehicle operating parameter is consistent with a predefined fuel economy goal, and for decreasing available engine performance if said monitored vehicle operating parameter is inconsistent with said predefined fuel economy goal.

3. The system of claim 1 wherein said set of input data signals are provided via a wireless communications device.

4. The system of claim 1 wherein said vehicle operating parameter corresponds to engine idle time;

and wherein said means for monitoring the value of said vehicle operating parameter includes a vehicle speed sensor operable to sense vehicle speed and produce a vehicle speed signal corresponding thereto;

and wherein said means for adjusting said engine performance parameter is responsive to said vehicle speed signal to increase available engine performance if said vehicle speed signal corresponds to an engine idling state for less than a percentage of time of a predetermined time interval of motor vehicle operation, and to decrease available engine performance if said vehicle speed signal corresponds to said engine idling state for more than said percentage of time of said predetermined time interval of motor vehicle operation.

5. The system of claim 1 wherein said vehicle operating parameter corresponds to engine idle time;

and wherein said means for monitoring the value of said vehicle operating parameter includes means for sensing a position of a manually actuatable throttle in the vehicle and producing a throttle position signal corresponding thereto;

and wherein said means for adjusting said engine performance parameter is responsive to said throttle position signal to increase available engine performance if said throttle position signal indicates a throttle position corresponding to an engine idling state for less than a percentage of time of a predetermined time interval of motor vehicle operation, and to decrease available engine performance if said throttle position signal indicates a throttle position corresponding to said engine idling state for more than said percentage of time of a predetermined time interval of motor vehicle operation.

6. The system of claim 1 wherein said vehicle operating parameter corresponds to engine idle time;

and wherein said means for monitoring the value of said vehicle operating parameter includes means for sensing the position of an idle validation switch operatively connected to a manually actuatable throttle in the vehicle and producing an idle validation switch status signal corresponding thereto;

and wherein said means for adjusting said engine performance parameter is responsive to said idle validation switch status signal to increase available engine performance if said idle validation switch status signal corresponds to the active state thereof for less than a percentage of time of a predetermined time interval of motor vehicle operation, and to decrease available engine performance if said idle validation switch status signal corresponds to the active state thereof for more than said percentage of time of said predetermined time interval of motor vehicle operation.

7. The system of claim 1 wherein said vehicle operating parameter corresponds to excessive engine speed time;

and wherein said means for monitoring the value of said vehicle operating parameter includes an engine speed sensor operable to sense engine speed and produce an engine speed signal corresponding thereto;

and wherein said means for adjusting said engine performance parameter is responsive to said engine speed signal to increase available engine performance if said engine speed signal exceeds an excessive engine speed threshold for less than a percentage of time of a predetermined time interval of motor vehicle operation, and to decrease available engine performance if said engine speed signal exceeds said excessive engine speed threshold for more than said percentage of time of said predetermined time interval of motor vehicle operation.

8. The system of claim 1 wherein said vehicle operating parameter corresponds to a distance traveled by the vehicle per unit of fuel used by the engine;

and wherein said means for monitoring the value of said vehicle operating parameter includes means for determining a distance traveled by the vehicle per unit of fuel used by the engine and producing a fuel usage signal corresponding thereto;

and wherein said means for adjusting said engine performance parameter is responsive to said fuel usage signal to increase available engine performance if said fuel usage signal corresponds to fuel usage above a predetermined fuel usage level, and to decrease available engine performance if said fuel usage signal corresponds to fuel usage below a predetermined fuel usage level.

9. The system of claim 1 wherein said vehicle operating parameter corresponds to a vehicle traveling distance wherein a numerically higher gear of a transmission in the vehicle is engaged with the engine;

and wherein said means for monitoring the value of said vehicle operating parameter includes means for determining a gear of the transmission presently engaged with the engine and producing a gear engaged signal corresponding thereto;

and wherein said means for adjusting said engine performance parameter is responsive to said gear engaged signal to increase available engine performance if said gear engaged signal indicates engagement of the engine with said numerically highest transmission gear for more than a predetermined vehicle traveling distance, and to decrease available engine performance if said gear engaged signal indicates engagement of the engine with said numerically highest transmission gear for less than the predetermined vehicle traveling distance.

10. The system of claim 1 wherein said vehicle operating parameter corresponds to rapid deceleration rate;

and wherein said means for monitoring the value of said vehicle operating parameter includes a vehicle speed sensor operable to sense vehicle speed and produce a vehicle speed signal corresponding thereto;

and wherein said means for adjusting said engine performance parameter is responsive to said vehicle speed signal to compute a vehicle deceleration rate and increase available engine performance if the vehicle deceleration rate exceeds a rapid deceleration rate less than a predefined number of times over a predetermined time interval, and decrease available engine performance if the vehicle deceleration rate exceeds said rapid deceleration rate more than said predefined number of times over said predetermined time interval.

11. The system of claim 1 wherein said vehicle operating parameter corresponds to average vehicle speed;

and wherein said means for monitoring the value of said vehicle operating parameter includes means for sensing vehicle speed, computing an average vehicle speed over a predetermined time interval of engine operations, and producing an average vehicle speed signal corresponding thereto;

and wherein said means for adjusting said engine performance parameter is responsive to said average vehicle speed signal to increase available engine performance if said average vehicle speed signal corresponds to an average vehicle speed below a predefined vehicle speed threshold during engine operation, and to decrease available engine performance if said average vehicle speed signal corresponds to an average vehicle speed above a predefined vehicle speed threshold during engine operation.

12. The system of claim 1 wherein said vehicle operating parameter corresponds to vehicle acceleration rate;

and wherein said means for monitoring the value of said vehicle operating parameter includes means for monitoring vehicle acceleration rate and producing a vehicle acceleration rate signal corresponding thereto;

and wherein said means for adjusting said engine performance parameter is responsive to said vehicle acceleration rate signal to increase available engine performance if said vehicle acceleration rate signal exceeds a predefined vehicle acceleration rate less than a predetermined number of times over a predefined time period, and to decrease available engine performance if said vehicle acceleration rate signal exceeds said predefined vehicle acceleration rate more than said predetermined number of times over said predefined time period.

13. A system for controlling internal combustion engine performance in a motor vehicle, comprising:

means for monitoring the value of a driver-controllable vehicle operating parameter corresponding to one of engine idle time, engine speed, vehicle mileage per unit of fuel, transmission gear selection, vehicle acceleration and vehicle speed; and

a control computer responsive to said vehicle operating parameter value to adjust available engine performance according to a predefined functional relationship between said vehicle operating parameter and an engine performance parameter, said control computer having established therein a minimum engine performance parameter value below which said available engine performance cannot be adjusted.

14. The system of claim 13 wherein said engine performance parameter corresponds to one of available engine output power and available vehicle speed.

15. The system of claim 13 wherein said monitoring means includes means for determining the value of said vehicle operating parameter over a first predefined time interval,

and wherein said control computer includes means for adjusting available engine performance for a second predefined time interval,

whereby engine performance during said second time interval is controlled in accordance with driver behavior during said first time interval as an incentive for operation of the vehicle in furtherance of established vehicle operating goals.

16. The system of claim 15 wherein said means for adjusting available engine performance includes means for alternatively increasing and decreasing available engine performance.