IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0559527
(1983-12-08)
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발명자
/ 주소 |
- Luhn, Dennis A.
- Norrick, Daniel A.
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출원인 / 주소 |
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대리인 / 주소 |
Gabala, James A.Gealow, Jon C.Gilroy, Hugh M.
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인용정보 |
피인용 횟수 :
6 인용 특허 :
3 |
초록
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A control system for an internal combustion engine is described which allows the engine to be started and stopped while unloaded. The invention incorporates the mechanical linkage operated by a solenoid to control a valve at the interior of the engine and an electronic circuit incorporating one or m
A control system for an internal combustion engine is described which allows the engine to be started and stopped while unloaded. The invention incorporates the mechanical linkage operated by a solenoid to control a valve at the interior of the engine and an electronic circuit incorporating one or more time delay relays. The invention provides a means of reducing or eliminating the source of vibration resulting from the starting and stopping of a single cylinder diesel engine. Several embodiments are described including one incorporating an integrated circuit timer and one incorporating two time delay relays.
대표청구항
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1. In an internal combustion engine having a combustion chamber, an exhaust valve, a drive shaft, a cam shaft driven by said drive shaft, and a rocker arm linkage for transmitting the rotation of said cam shaft to operate said exhaust valve, an unloading circuit, comprising: (a) an electrical sol
1. In an internal combustion engine having a combustion chamber, an exhaust valve, a drive shaft, a cam shaft driven by said drive shaft, and a rocker arm linkage for transmitting the rotation of said cam shaft to operate said exhaust valve, an unloading circuit, comprising: (a) an electrical solenoid; (b) camming means for operating said rocker arm linkage to hold said exhaust valve open in response to the energization of said electrical solenoid; (c) an electrical time delay circuit for energizing said solenoid for a pre-selected time interval, said electrical time delay circuit including a first time delay relay for energizing said solenoid during the start-up and shut-down of said engine, and a second time delay relay for delaying the energization of said first time delay relay during the shut-down of said engine; and (d) switching means for energizing said electrical time delay circuit during the shut-down of said engine, said switching means including means for energizing said electrical circuit during the start-up and shut-down of said engine, whereby said engine on slowing down is allowed to rundown for a first pre-selected time interval while loaded and for a second pre-selected time interval while unloaded. 2. A control system for an internal combustion engine of a type having a combustion chamber and a valve for controlling the flow of fluid between said combustion chamber and the atmosphere, comprising: (a) means for opening and closing said valve in response to the rotation of a control shaft to a pre-selected position; (b) solenoid means for rotating said control shaft to said pre-selected position upon energization of an electrical solenoid; (c) monostable means for energizing said solenoid for a pre-selected time interval, said monostable means including a reset terminal, a trigger terminal and an output terminal; (d) a first relay which is energized in response to the output terminal of said monostable means and which includes a plurality of electrical contacts which are opened and closed in response to the operation of said relay, said electrical contacts including a first contact set which is connected to said solenoid such that said solenoid is energized when said monostable means is triggered and de-energized when said monstable means is reset, and a second contact set which are normally closed when said relay is not energized; (e) three-position electrical switch means for supplying electrical power to trigger said monostable means when said switch means is in a start position and for supplying electrical power to reset said monostable means when said switch is in a run position; and (f) energy storage means, electrically in parallel with said monostable means, for storing power to operate said monostable means and to trigger said monostable means when said three-position switch means is moved between said run position and a position intermediate said start and said run positions, whereby said solenoid means is operated when said three-position switch means is in its start position, said solenoid means is de-energized when said three-position switch is in its run position and said solenoid means is re-energized when said three-position switch is between its start and its run positions after being in its run position. 3. The control system of claim 2, wherein said first relay includes normally open contact means for supplying power to said monostable means when said three-position electrical switch means is in its run position. 4. In an internal combustion engine having a combustion chamber, and a valve for controlling the flow of combustion gases from said combustion chamber to the atmosphere, a control system comprising: (a) camming means for opening said valve in response to the rotation of a control shaft to a pre-selected position; (b) a solenoid and solenoid means for rotating said control shaft to said pre-selected position upon the energization of said solenoid, said solenoid having an electrical armature and a plunger operated in response to the energization of said armature, and said solenoid means including a bell crank connecting said plunger with said control shaft; (c) a time delay circuit for energizing said solenoid for a pre-selected time interval; and (d) electrical switch means for supplying electrical power to said time delay circuit when said engine is shutdown, whereby said engine is shut down with said combustion chamber vented to the atmosphere for a pre-selected period of time. 5. The control system of claim 1, wherein said engine includes: a drive shaft, a cam shaft which is rotated in response to said drive shaft, and rocker arm follower means for opening and closing said valve in sychronized relationship with the rotation of said engine drive shaft, and wherein said camming means includes a cam rotated by said control shaft, said cam being positioned to operate said rocker arm follower means to hold said valve open in response to the rotation of said control shaft. 6. The control system of claim 1, wherein said time delay circuit includes: a relay coil which is energized in response to said switch means, a plurality of electrical contacts which are opened and closed in response to the energization of said relay coil with one set of said contacts being electrically in series with said solenoid and said switch means, and an RC circuit for de-energizing said coil after said pre-selected time interval. 7. The control system of claim 1, wherein said electrical switch means comprises a a plurality of electrical contact pairs including one pair which is closed when said engine is started, said one pair being electrically in series with said solenoid. 8. The control system of claim 1, wherein said engine includes: a throttle control for controlling the flow of fuel to said combustion chamber, said throttle control being adjustable between an up-position and a down-position; and wherein said time delay circuit includes an electrical limit switch having at least one set of contacts which are closed in one of said up-position and down-position of said throttle control. 9. The control system of claim 8, wherein said limit switch includes two sets of contacts, one set of which is closed when said throttle control is in its up-position and one set of which is closed when said throttle is in its down-position. 10. The control system of claim 1, wherein said switch means supplies power to said time delay circuit when said engine is started and when said engine is shut-down. 11. The control system setforth in claim 10, wherein said time delay circuit includes: a monstable; a first relay coil which is energized in response to the operation of said monostable; a plurality of electrical contacts which are opened and closed in response to the energization of said first relay coil with at least one set of normally open contacts being electrically in series with said solenoid means, and with at least one set of normally closed contacts; and wherein said electrical switch means includes a first switch having a start position for triggering said monostable into operation, said start position being electrically in series with said one set of normally closed contacts and said monostable. 12. The control system of claim 11, wherein said monostable defines a tripped condition and a reset condition such that said first relay coil is energized when said monostable is tripped and said first relay coil is de-energized when said monostable is reset. 13. The control system of claim 10, wherein said time delay circuit includes: a monostable having an output terminal, a reset terminal, and a triggering terminal; a first relay coil which is energized in response to the output terminal of said monostable, and a plurality of electrical contacts which are opened and closed in response to the energization of said first relay coil with one of said contacts being electrically in series with said solenoid means. 14. The control system of claim 13, wherein said electrical switch means includes: a three position switch defining a start position, a stop position and a run position, said start position supplying power to a start terminal; and wherein said plurality of electrical contacts includes a normally closed set of contacts that are electrically in series with said triggering terminal of said monstable and said start terminal of said three position switch. 15. The control system of claim 14, further including energy storage means, activated by said switch means, for keeping said monostable energized while said switch means is operated. 16. The control system of claim 13, wherein said electrical switch means includes: a switched source of power having a start position wherein a start terminal is energized, a run position where a run terminal is energized and a stop position where said start terminal and said run terminal are de-energized; a limit switch having one terminal connected to an electrical ground and a second terminal which is grounded and ungrounded in response to the operation of said limit switch; and a second relay coil connected between the run terminal of said switched source of power and the second terminal of said limit switch, said second relay coil operating a plurality of electrical contacts which are opened and closed in response to the energization and de-energization of said second relay coil, whereby said second relay coil is energized when said switch source of power is in its run position and said limit switch is closed. 17. The control system of claim 16, wherein said engine includes a throttle control for controlling the flow of fuel to said combustion chamber, said throttle control being adjustable between an up-position and a down-position; and wherein said limit switch is closed when said throttle control is in its up-position. 18. The control system of claim 17, wherein said second relay coil includes one set of contacts which are closed upon de-energization of said second relay coil and wherein said set of contacts are connected to the reset terminal of said monostable, whereby said solenoid means is de-energized when said throttle control is in its up-position and said switched source is power is in its run position.
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