IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0722617
(2010-03-12)
|
등록번호 |
US-8800531
(2014-08-12)
|
발명자
/ 주소 |
- Wiley, Stephen M.
- Pipis, Jr., John S.
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
1 인용 특허 :
29 |
초록
▼
A compression brake system of an internal combustion engine includes a mechanical system for coupling a camshaft to a brake actuator assembly. The mechanical system includes a stationary housing defining an aperture and a lifter is slidably disposed in the aperture. A resilient element is disposed b
A compression brake system of an internal combustion engine includes a mechanical system for coupling a camshaft to a brake actuator assembly. The mechanical system includes a stationary housing defining an aperture and a lifter is slidably disposed in the aperture. A resilient element is disposed between the housing and the shoulder and configured to bias the lifter toward the camshaft. The mechanical system is dedicated to compression braking, and therefore the camshaft may have a lobe optimized for braking.
대표청구항
▼
1. A compression brake system for an internal combustion engine having an engine block and a camshaft rotatable relative to the engine block, the compression brake system comprising: a cam follower assembly including a cam follower body having a first end supporting a roller disposed in contact with
1. A compression brake system for an internal combustion engine having an engine block and a camshaft rotatable relative to the engine block, the compression brake system comprising: a cam follower assembly including a cam follower body having a first end supporting a roller disposed in contact with the camshaft and a second end defining contact point oriented away from the camshaft; anda brake actuator assembly having: a brake actuator piston;a master cylinder having a volume of fluid, the volume of fluid having a deactivated state, in which the volume of fluid has a first fluid pressure, and an activated state, in which the volume of fluid has a second fluid pressure that is higher than the first fluid pressure;a master piston slidably disposed in the master cylinder and hydraulically coupled to the brake actuator piston; anda master pin having a first end coupled to the master piston and a second end opposite the first end;the master piston moving to a retracted position when the master cylinder is in the deactivated state, in which the second end of the master pin is spaced from the contact point, and the master piston moving to an extended position when the master cylinder is in the activated state, in which the second end of the master pin mechanically engages the contact point, wherein the master piston is biased in the retracted position. 2. The compression brake system of claim 1, in which: the cam follower assembly includes a housing supported in a substantially fixed relation to the engine block, the housing defining an aperture;the cam follower body comprises a lifter slidably disposed in the aperture and defining a shoulder; anda resilient element is disposed between the housing and the shoulder and configured to bias the lifter toward the camshaft. 3. The compression brake system of claim 2, in which the resilient element comprises a spring. 4. The compression brake system of claim 2, in which the contact point is formed with a recess shaped to complement the second end of the master pin. 5. The compression brake system of claim 1, in which the cam follower body comprises a rocker arm pivotably coupled to the engine block. 6. The compression brake system of claim 5 further comprising a cantilevered beam spring having a base end coupled to the engine block and a free end engaging the rocker arm, the cantilevered beam spring configured to bias an end of the rocker arm carrying the roller toward the camshaft. 7. The compression brake system of claim 5, further comprising a forked spring having a base end coupled to a brake actuator assembly housing and a free end engaging the rocker arm, the forked spring configured to bias and end of the rocker arm carrying the roller toward the camshaft. 8. An internal combustion engine, comprising: an engine block;a camshaft rotatably coupled to the engine block;a common rail fuel system;a compression brake system comprising: a cam follower assembly including a cam follower body having a first end supporting a roller disposed in contact with the camshaft and a second end defining contact point oriented away from the camshaft; anda brake actuator assembly having: a brake actuator piston;a master cylinder having a volume of fluid, the volume of fluid having a deactivated state, in which the volume of fluid has a first fluid pressure, and an activated state, in which the volume of fluid has a second fluid pressure that is higher than the first fluid pressure;a master piston slidably disposed in the master cylinder and hydraulically coupled to the brake actuator piston; anda master pin having a first end coupled to the master piston and a second end opposite the first end;the master piston moving to a retracted position when the master cylinder is in the deactivated state, in which the second end of the master pin is spaced from the contact point and the master piston moving to an extended position when the master cylinder is in the activated state, in which the second end of the master pin mechanically engages the contact point, wherein the master piston is biased in the retracted position. 9. The internal combustion engine of claim 8, in which: the cam follower assembly includes a housing supported in a substantially fixed relation to the engine block, the housing defining an aperture;a lifter slidably disposed in the aperture and defining a shoulder; anda resilient element is disposed between the housing and the shoulder and configured to bias the lifter toward the camshaft. 10. The internal combustion engine of claim 9, in which the contact point is formed with a recess shaped to complement the second end of the master pin. 11. The internal combustion engine of claim 8, in which the cam follower body comprises a rocker arm pivotably coupled to the engine block. 12. The internal combustion engine of claim 11, further comprising a cantilevered beam spring having a base end coupled to the engine block and a free end engaging the rocker arm, the cantilevered beam spring configured to bias an end of the rocker arm carrying the roller toward the camshaft. 13. The internal combustion engine of claim 11, further comprising a forked spring having a base end coupled to a brake actuator assembly housing and a free end engaging the rocker arm, the forked spring configured to bias and end of the rocker arm carrying the roller toward the camshaft. 14. A compression brake system for an internal combustion engine having an engine block and a camshaft supported for rotation relative to the engine block, the compression brake system comprising: a cam follower assembly including: a housing supported in a substantially fixed relation to the engine block, the housing defining an aperture;a lifter slidably disposed in the aperture and having a lifter first end facing the master piston and defining a contact point and a lifter second end;a roller coupled to the lifter second end and disposed in contact with the camshaft; anda resilient element disposed between the housing and the lifter and configured to bias the lifter toward the camshaft; anda brake actuator assembly having: a brake actuator piston;a master cylinder having a volume of fluid, the volume of fluid having a deactivated state, in which the volume of fluid has a first fluid pressure, and an activated state, in which the volume of fluid has a second fluid pressure that is higher than the first fluid pressure; anda master piston slidably disposed in the master cylinder and hydraulically coupled to the brake actuator piston; anda master pin having a first end coupled to the master piston and a second end opposite the first end;the master piston moving to a retracted position when the master cylinder is in the deactivated state, in which the second end of the master pin is spaced from the contact point, and the master piston moving to an extended position when the master cylinder is in the activated state, in which the second end of the master pin mechanically engages the contact point, wherein the master piston is biased in the retracted position.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.