Clutch brake warning indicator

• US 9,110,493 B2
• Filed: 03/06/2013
• Issued: 08/18/2015
• Est. Priority Date: 03/06/2013
• Status: Active Grant

• Current Assignee: PACCAR Incorporated
• Original Assignee: PACCAR Incorporated
• Inventors: Legler, Edward P., Jahns, Steven Karl, Melander, Ingemar, Henriksson, Per Olof
• Primary Examiner(s): Hlavka, David J
• Application Number:
  US13/787,195
• Publication Number:
  US 20140251065A1
• Time in Patent Office: 895 Days
• Field of Search: 192/21.5, 192/30.W, 192/91.A, 192/12.R, 192/18.R, 340/426.32
• US Class Current: 1/1
• CPC Class Codes: G05G 1/44 pivoting
• CPC Class Codes: G05G 5/03 Means for enhancing the operator's awareness of arrival of the controlling member at a command or datum position; Providing feel, e.g. means for creating a counterforce arrangements for indicating the position of the controlling member G05G1/015
• CPC Class Codes: Y10T 74/20528 Foot operated

Abstract

A device, sometimes referred to as a clutch brake warning indicator, that provides feedback, which may be tactile, audible or visual, to the vehicle operator as the clutch pedal is nearing the point of its stroke where the clutch brake will be engaged. In use, the feedback clutch brake warning indicator will assist the driver against applying the clutch brake during shifting operations, which can cause severe damage to the clutch.

Claims

1. An apparatus for use in a vehicle, comprising:

a clutch pedal configured to travel between a selected range of motion in order to disengage a vehicle clutch and to engage a clutch brake, wherein the selected range of motion comprising a clutch brake engaged phase and a non-clutch brake engaged phase, wherein the non-clutch brake engaged phase includes a clutch brake warning range; and

a feedback generator associated with clutch pedal motion, the feedback generator configured to generate a feedback signal when the clutch pedal is positioned in the clutch brake warning range.

2. The apparatus of claim 1, wherein the feedback generator includes one or more springs configured to impart force against clutch pedal travel during the clutch brake warning range.

3. The apparatus of claim 2, wherein the feedback signal has an intensity that increases as the clutch pedal travels along the clutch brake warning range.

4. The apparatus of claim 1, wherein the clutch pedal is pivotally coupled to a support structure, and wherein the feedback generator includes

a lever moveably coupled to the support structure;

a spring positioned between the lever and a part of the support structure;

a protuberance coupled to the clutch pedal, wherein the protuberance is configured and arranged to contact the lever during clutch pedal travel and to move the lever to compress the spring.

5. The apparatus of claim 4, wherein the spring is compressed as the clutch pedal travels along the clutch brake warning range.

6. An apparatus for use in a vehicle, comprising:

a clutch brake having an engaged position and a non-engaged position;

a clutch pedal configured to travel between a range of motion in order to disengage a vehicle clutch and to move the clutch brake from the non-engaged position to the engaged position, the range of motion comprising a clutch brake engaged range, wherein the clutch brake is in the engaged position, and a clutch brake non-engaged range wherein the clutch brake is in the non-engaged position, wherein the clutch brake non-engaged range includes a clutch brake warning range; and

a clutch brake warning indicator associated with clutch pedal movement, the clutch brake warning indicator configured to warn a vehicle driver when the clutch pedal moves into the clutch brake warning range.

7. The apparatus of claim 6, wherein the clutch brake warning indicator includes a spring.

8. The apparatus of claim 6, wherein the clutch brake warning indicator includes a vibration signal.

9. The apparatus of claim 6, wherein the clutch brake warning indicator is configured to generate a visual or audible signal.

11. The apparatus of claim 6, wherein the clutch pedal is mechanically coupled to the clutch brake.

10. A clutch system for a vehicle, comprising:

a clutch configured to couple/decouple an engine to/from a transmission input shaft;

a clutch brake configured to retard rotation of the transmission input shaft, the clutch brake having an engaged position and a disengaged position;

a clutch pedal configured to travel between a selected range of motion in order to decouple the engine from the transmission input shaft and to move the clutch brake from the non-engaged position to the engaged position, the selected range of motion comprising a clutch brake engaged phase in which the clutch brake is in the engaged position and a clutch brake disengaged phase in which the clutch brake is in the disengaged position, wherein the clutch brake disengaged phase includes a clutch brake warning range; and

a clutch brake warning indicator associated with clutch pedal motion, the clutch brake warning indicator configured to indicate to a vehicle driver when the clutch pedal moves within the clutch brake warning range.

12. The clutch system of claim 10, wherein the clutch pedal is mechanically coupled to the clutch and to the clutch brake.