Final control element for controlling internal combustion engines

• US 6,973,913 B2
• Filed: 08/04/2004
• Issued: 12/13/2005
• Est. Priority Date: 08/07/2003
• Status: Expired due to Fees

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Knorpp, Michael, Brozio, Michael
• Primary Examiner(s): WOLFE JR, WILLIS RAY
• Application Number:
  US10/910,345
• Publication Number:
  US 20050120997A1
• Time in Patent Office: 496 Days
• Field of Search: 123/336, 123/337, 123/361, 123/396, 123/399, 123/400, 123/403, 251/304, 251/305
• US Class Current: 123/396
• CPC Class Codes: F02D 11/04 characterised by mechanical control linkages F02D11/06 takes precedence

Abstract

A final control element movable between a minimal and a maximal position for controlling an internal combustion engine is acted upon by a first spring element acting in the closing direction and a second spring element acting in the opening direction, the latter having a first end and a second end. The first end of the second spring element is supported in stationary fashion in a housing. The second spring element transmits its intrinsic tension in the tangential and radial directions either to a bearing point on the final control element or to a second bearing point of the housing and is adjustable in its angular position by means of an adjustable stop.

Claims

1. In a final control element for controlling an internal combustion engine, which is movable between a minimal and a maximal position and is acted upon by a first spring element acting in the closing direction and a second spring element (1) acting in the opening direction, which second spring element has a first end (3) and a second end (4), the first end (3) of the second spring element being received in a housing (41), the improvement wherein the second spring element (1) transmits its intrinsic tension in radial and tangential directions either to a bearing point (24) embodied on the final control element (13) or to a second bearing point (21) of the housing (41).

2. The final control element in accordance with claim 1, wherein the second spring element (1) rests with its ends (3, 4) in bearing points (5, 21) of the housing (41), as long as the final control element (13) is not in engagement with the spring element (1).

3. The final control element in accordance with claim 1, wherein the second spring element (1), when it is in engagement with the final control element (13), rests in the region of the second, movable end (4) with a contact face (12) on a contact face (15) of the final control element (13).

4. The final control element in accordance with claim 1, wherein the bearing point (24) for the deflected final control element (13) is embodied as a bend (12) on the second spring element (1), which bend is engaged by a stop side (15) of a head (14) of the final control element (13).

5. The final control element in accordance with claim 1, wherein the final control element (13) acts upon a throttle valve of a throttle device (40) in the intake tract of an internal combustion engine.

6. The final control element in accordance with claim 1, wherein the first bearing point (5) of the second spring element (1) has at least two supports (6, 7) in the housing (41) and has play.

7. The final control element in accordance with claim 6, wherein the first bearing point (5) is embodied in slotlike form in the housing (41).

8. The final control element in accordance with claim 1, wherein the second spring element (1) is embodied as a C-shaped leaf spring, whose primary shape (10) is between 180°

and 360°

.

9. The final control element in accordance with claim 8, wherein the primary shape (10) of the second spring element (1) covers a 270°

angular range.

10. The final control element in accordance with claim 8, wherein the second spring element (1), besides the primary shape (10), has an extended portion (31), which adjoins a first bend (11) in the region of the first end (3) of the spring.

11. The final control element in accordance with claim 1, wherein the final control element is embodied as a toothed segment (42) which cooperates with a stop (51) structurally connected to the housing.

12. The final control element in accordance with claim 11, wherein the stop (51) is embodied with an adjusting screw (52) for defining the course of rotation of the toothed segment (42).

13. The final control element in accordance with claim 11, wherein the toothed segment (42) has a driver (57) cooperating with a bearing point (24) on the spring element (1).

14. The final control element in accordance with claim 1, wherein the second bearing point (21) of the second spring element (1) in the housing (41) includes a first support (22) for absorbing radial forces and a further support (23) for absorbing tangential forces.

15. The final control element in accordance with claim 14, wherein the further support (23) of the second bearing point (21) is embodied adjustably for absorbing tangential forces.

16. The final control element in accordance with claim 15, further comprising an adjusting element (54) embodied in the further support (23) of the second bearing point (21).

17. The final control element in accordance with claim 16, wherein the adjusting element (54) is embodied as an adjusting screw.