SHIFT TIMING INDICATOR SYSTEM FOR VEHICULAR MANUAL TRANSMISSION

• US 20100312442A1
• Filed: 06/05/2009
• Published: 12/09/2010
• Est. Priority Date: 06/05/2009
• Status: Active Grant

• Current Assignee: Toyota Motor Corporation
• Original Assignee: Toyota Motor Corporation
• Inventors: Ahn, Samuel S.
• Granted Patent: US 8,255,133 B2
• Time in Patent Office: Days
• US Class Current: 701/64
• CPC Class Codes: F16H 2057/016 Monitoring of overload conditions
• CPC Class Codes: F16H 2059/366 Engine or motor speed
• CPC Class Codes: F16H 2063/426 with means for advising the driver for proper shift action, e.g. prompting the driver with allowable selection range of ratios
• CPC Class Codes: F16H 59/44 dependent on machine speed of the machine, e.g. the vehicle
• CPC Class Codes: F16H 59/70 dependent on the ratio established
• CPC Class Codes: F16H 59/72 dependent on oil characteristics, e.g. temperature, viscosity
• CPC Class Codes: F16H 61/12 Detecting malfunction or potential malfunction, e.g. fail safe in control of hydrostatic gearing F16H61/4192; Circumventing or fixing failures
• CPC Class Codes: F16H 63/42 Ratio indicator devices

Abstract

An improper gear shift timing indicator system for a manual transmission vehicle. The system includes a gear position detector for detecting gear position information and a control unit in communication with the gear position detector. The control unit is configured to detect a gear shift event based on a change in the gear position information. The control unit measures elapsed time during the gear shift event and compares the elapsed time with a threshold value, which is based on various vehicle operating parameters and the given gear shift event. A signal system is in communication with the control unit and the control unit causes the signal system to provide a signal to a driver of the vehicle when the elapsed time of the gear shift event is less than the threshold value.

Claims

1. A system for indicating improper gear shift timing in a manual transmission vehicle, the system comprising:

a gear position detector configured to detect gear position information;

a control unit in communication with the gear position detector, the control unit configured to receive the gear position information from the gear position detector and to determine a gear shift event based on a change in the gear position information, wherein the control unit being further configured to measure elapsed time during the gear shift event and to compare the elapsed time of the gear shift event with a threshold value; and

a signal system in communication with the control unit, wherein the control unit is configured to cause the signal system to provide a signal to a driver of the vehicle when the elapsed time of the gear shift event is less than the threshold value.

2. The system of claim 1, wherein the gear shift event is a change in gear position from a one gear position to another gear position.

3. The system of claim 1, further comprising at least one vehicle operating parameter sensor, the control unit being coupled to the vehicle operating parameter sensor and configured to monitor the vehicle operating parameter sensor, the threshold value being determined in part based on the vehicle operating parameter sensed by the vehicle operating parameter sensor.

4. The system of claim 3, wherein the vehicle operating parameter sensor senses one selected from a group of vehicle speed, engine speed and transmission oil temperature.

5. The system of claim 4, further comprising at least one of an engine speed sensor, a vehicle speed sensor, and a transmission oil temperature sensor in communication with the control unit.

6. The system of claim 1, wherein the signal provided by the signal system is an audible or visual signal.

7. The system of claim 1, wherein the gear position detector is configured to detect when the transmission is in gear.

8. The system of claim 1, wherein the gear position detector is configured to detect when the transmission is out-of-gear.

9. A method of indicating improper gear shift timing in a manual transmission vehicle, the method comprising:

detecting a gear shift event;

measuring the elapsed time of the gear shift event;

comparing the elapsed time with a threshold value; and

providing a signal to a driver of the vehicle when the elapsed time is less than the threshold value.

10. The method of claim 9, wherein the step of detecting the gear shift event includes receiving gear position information from a gear position detector and determining the gear shift event based on a change in the gear position information, wherein receiving the gear position information and detecting the gear shift event is performed by a control unit in communication with the gear position detector.

11. The method of claim 9, wherein the step of measuring the elapsed time of the gear shift event is performed by a timer within a control unit.

12. The method of claim 9, wherein the step of comparing the elapsed time with the threshold value includes monitoring vehicle operating parameters and determining the threshold value based on the vehicle operating parameters, wherein the steps of monitoring the vehicle operating parameters, determining the threshold value, and comparing the elapsed time with the threshold value is performed by the control unit.

13. The method of claim 12, wherein the step of monitoring the vehicle operating parameters includes the step of monitoring a vehicle operating parameter selected from a group consisting of vehicle speed, internal combustion engine speed, transmission oil temperature, and gear position.

14. The method of claim 13, wherein step of monitoring the vehicle operating parameters includes receiving information from at least one of an engine rpm sensor, a vehicle speed sensor, and a transmission oil temperature sensor in communication with the control unit.

15. The method of claim 9, wherein the step of providing the signal to the driver is performed by a signal system in communication with the control unit.

16. The method of claim 9, wherein the step of providing the signal to the driver includes providing one of an audible or visual signal.

17. The method of claim 9, wherein the step of detecting the gear shift event includes detecting a change in gear position from one gear position to another gear position.