Drive-by-wire throttle control apparatus

• US 7,798,122 B2
• Filed: 09/04/2008
• Issued: 09/21/2010
• Est. Priority Date: 09/04/2008
• Status: Expired due to Fees

• Current Assignee: Honeywell International Inc.
• Original Assignee: Honeywell International Inc.
• Inventors: Philip, Bindu, Moonamkandy, Shakil, Gudi, Ravindra, Reddy, Gangl Rajula, Chandran, Anand, Cable, Al, Holzmacher, Rick
• Primary Examiner(s): Gimie; Mahmoud
• Application Number:
  US12/204,091
• Publication Number:
  US 20100057322A1
• Time in Patent Office: 747 Days
• Field of Search: 123/399, 123/400, 123/376, 123/319, 180/170, 180/174
• US Class Current: 123/399
• CPC Class Codes: B62K 23/04 Twist grips
• CPC Class Codes: B62K 23/06 Levers

Abstract

A drive-by-wire throttle control apparatus and method includes a variable resistance sensor. A contact arm can be mechanically connected between a thumb lever and a variable resistance sensor. The variable resistance sensor possesses a resistive film that includes a fixed resistor and a variable resistor configured from a carbon film. As the thumb lever rotates, the contact arm traverses the resistive film, thereby altering the resistance of the variable resistor, determining the position of the thumb lever and thereafter generating a signal based on the sensed position. The signal can be sent to an ECU (Electronic Control Unit) in the form of a varying voltage, which in turn controls the throttle of a vehicle.

Claims

1. A drive-by-wire throttle control apparatus, comprising:

a mounting bracket;

a thumb lever rotationally mounted on the mounting bracket;

a resistive film fixedly mounted on the mounting bracket, said resistive film comprising a fixed resistor and a variable resistor;

a contact arm mechanically connected to the thumb lever and engaging the resistive film, said contact arm configured to travel over said resistive film as said thumb lever rotates, thereby varying a resistance of said variable resistor; and

a variable resistance sensor coupled to the resistive film and configured to determining a position of said thumb lever from at least the resistance of said variable resistor.

2. The apparatus of claim 1 wherein said variable resistance sensor is capable of detecting a position of said thumb lever with respect to a handle bar at any point of time with respect to said mounting bracket.

3. The apparatus of claim 1 further comprising an electronic control unit associated with said variable resistance sensor.

4. The apparatus of claim 3 wherein said electronic control unit is connected to said variable resistance sensor.

5. The apparatus of claim 4 wherein said electronic control unit is connected to said variable resistance sensor utilizing a plurality of electrical wires in order to generate a signal in a form of a varying voltage based on a sensed position, in order to control a throttle of a vehicle and thereby eliminate a need for a throttle cable.

6. The apparatus of claim 1 wherein said thumb lever at a zero acceleration position adjusts a value of said variable resistor to thereby generate an output voltage of 0 Volts.

7. The apparatus of claim 1 wherein said thumb lever at a maximum acceleration position adjusts a value of said variable resistor to thereby generate an output voltage of approximately 5 Volts.

8. A drive-by-wire throttle control method, comprising:

configuring a mounting bracket to include a contact arm mechanically connected between a thumb lever and at least one variable resistance sensor, wherein said at least one variable resistance sensor detects a position of said thumb lever at any point of time with respect to said mounting bracket;

associating a resistive film with said at least one variable resistance sensor; and

configuring said resistive film to comprise a fixed resistor and a variable resistor, wherein said contact arm travels over said resistive film as said thumb lever rotates, thereby varying a resistance of said variable resistor and determining a position of said thumb lever.

9. The method of claim 8 wherein said at least one variable resistance sensor is capable of detecting a position of said thumb lever with respect to a handle bar at said any point of time with respect to said mounting bracket.

10. The method of claim 8 further comprising associating an electronic control unit with said at least one variable resistance sensor.

11. The method of claim 10 further comprising connecting said electronic control unit to said at least one variable resistance sensor.

12. The method of claim 11 further comprising connecting said electronic control unit to said at least one variable resistance sensor utilizing a plurality of electrical wires in order to generate a signal in a form of a varying voltage based on a sensed position, in order to control a throttle of a vehicle and thereby eliminate a need for a throttle cable.

13. The method of claim 8 wherein said thumb lever at a zero acceleration position adjusts a value of said variable resistor to thereby generate an output voltage of 0 Volts.

14. The method of claim 8 wherein said thumb lever at a maximum acceleration position adjusts a value of said variable resistor to thereby generate an output voltage of approximately 5 Volts.