System and method for alerting and suppression of detonation and/or pre ignition phenomena in internal combustion engines by monitoring RPM fluctuation
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G01M-015/11
G01M-015/04
F02D-041/22
F02P-005/152
F02D-035/02
F02D-041/14
F02D-041/26
F02D-037/02
F02D-041/00
B64D-031/00
F02P-005/04
출원번호
US-0373753
(2012-12-04)
등록번호
US-9261039
(2016-02-16)
우선권정보
IL-218127 (2012-02-15)
국제출원번호
PCT/IL2012/050502
(2012-12-04)
국제공개번호
WO2013/121408
(2013-08-22)
발명자
/ 주소
Grumer, Bernard
Levy, Nathan
출원인 / 주소
Israel Aerospace Industries Ltd.
대리인 / 주소
Browdy and Neimark, PLLC
인용정보
피인용 횟수 :
0인용 특허 :
5
초록▼
An engine system with advance detection of detonation and/or pre ignition, the system comprising an engine, operative for propulsion of a vehicle by generating rotational motion, whose rotational velocity over time is monitored; and a detonation and/or pre ignition detector operative to provide an a
An engine system with advance detection of detonation and/or pre ignition, the system comprising an engine, operative for propulsion of a vehicle by generating rotational motion, whose rotational velocity over time is monitored; and a detonation and/or pre ignition detector operative to provide an alert for impending detonation and/or pre ignition of the engine, if the rotational velocity fluctuates over time to an extent which is predetermined to be unsafe.
대표청구항▼
1. An engine system with advance detection of detonation and/or pre ignition, the system comprising: an engine, operative for propulsion of a vehicle by generating rotational motion, whose rotational velocity over time is monitored; anda detonation and/or pre ignition detector, activated only if the
1. An engine system with advance detection of detonation and/or pre ignition, the system comprising: an engine, operative for propulsion of a vehicle by generating rotational motion, whose rotational velocity over time is monitored; anda detonation and/or pre ignition detector, activated only if the throttle's range is above a predetermined threshold, which is operative to provide an alert for impending detonation and/or pre ignition of the engine, if the rotational velocity over a plurality of rotational cycles of said rotational motion fluctuates over time with a frequency which is predetermined to be unsafe. 2. A system according to claim 1 wherein a rotational velocity fluctuation pattern is predetermined to be safe if local fluctuations of the rotational velocity never exceed a threshold value. 3. A system according to claim 1 wherein a rotational velocity fluctuation pattern is predetermined to be unsafe if local fluctuations of the rotational velocity exceed a threshold value at least a predetermined number of times within a predetermined time window. 4. A system according to claim 3 wherein said predetermined time window comprises 10 sec. 5. A system according to claim 2 wherein a rotational velocity fluctuation pattern is predetermined to be safe if fluctuations of the rotational velocity within a time slot whose size is 770 milliseconds+−25%, never exceed a threshold value. 6. A system according to claim 3 wherein a rotational velocity fluctuation pattern (RPM fluctuation pattern) is predetermined to be unsafe if fluctuations of the rotational velocity (RPM) within a time slot whose size is 770 millisecond+−25%, exceed a threshold value at least a predetermined number of times within a predetermined time window. 7. A system according to claim 1 which also comprises a detonation and/or pre ignition retardation functionality which is activated responsive to said alert. 8. A system according to claim 7 wherein a throttle regulates said engine's power depending on the throttle's range and wherein said detonation and/or pre ignition retardation functionality comprises a throttle reducer operative to reduce the throttle's range, responsive to said alert. 9. A system according to claim 8 wherein the detonation and/or pre ignition detector is activated only if the throttle's range is above 60%. 10. A system according to claim 1 wherein the detonation and/or pre ignition detector is operative to determine whether or not the rotational velocity is fluctuating over time to an extent predetermined to be unsafe, once every 70 milliseconds. 11. A system according to claim 6 wherein said predetermined number of times comprises 3-5 times in 10 seconds. 12. A system according to claim 1 and also comprising an aircraft and wherein the engine is operative to airlift the aircraft. 13. A system according to claim 8 wherein the throttle reducer is operative to reduce the throttle's range to below a threshold value of between 60% and 70%, responsive to said alert. 14. A system according to claim 1 wherein the rotational velocity of the engine is recorded by an external monitor and is accessed by the detonation and/or pre ignition detector. 15. A system according to claim 14 and also comprising an external monitor recording the rotational velocity of the engine for provision to the detonation and/or pre ignition detector. 16. A system according to claim 15 wherein said external monitor comprises an on-board computer controlling a vehicle motorized by the engine. 17. A system according to claim 15 wherein said external monitor comprises a computerized control center, which is remote from and which controls a vehicle motorized by the engine, and wherein said computerized control center receives engine rotational velocity information from an on-board RPM sampler. 18. A system according to claim 12 wherein said aircraft comprises a UAV (unmanned aerial vehicle). 19. A system according to claim 1 wherein said engine comprises a Rotax 914 engine. 20. A system according to claim 1 and also comprising an aircraft control station operative to control the structure capable of being airborne from the ground, and wherein said detonation and/or pre ignition detector resides within the aircraft control station. 21. A system according to claim 20 wherein the aircraft control station comprises a UAV ground control station operative to control a UAV and wherein the engine is operative for airlifting the UAV by generating rotational motion whose rotational velocity over time is monitored. 22. A system according to claim 15 wherein the detonation and/or pre ignition detector resides on a computer which generates RPM and throttle information. 23. A system according to claim 22 wherein the computer which generates RPM and throttle information comprises an engine controller. 24. A system according to claim 3 wherein said threshold value comprises 60 rpm. 25. A system according to claim 1 further comprising an RPM sensor for providing said rotational velocity over a plurality of said rotational cycles. 26. A system according to claim 1 further comprising an RPM sensor native to a Rotax 914 engine for providing said rotational velocity over a plurality of said rotational cycles. 27. A system according to claim 1 wherein the engine submits, for each said rotational cycle of a crankshaft, a signal to an engine controller that computes said rotational velocity over a plurality of said rotational cycles. 28. An engine system with advance detection of detonation and/or pre ignition, the system comprising: an engine, operative for propulsion of a vehicle by generating rotational motion, whose rotational velocity over time is monitored; anda detonation and/or pre ignition detector, activated only if the throttle's range is above a predetermined threshold, which is operative to provide an alert for impending detonation and/or pre ignition of the engine, if the rotational velocity fluctuates over time with a frequency which is predetermined to be unsafe,wherein a rotational velocity fluctuation pattern is predetermined to be safe if local fluctuations of the rotational velocity never exceed a threshold value, andwherein said threshold value comprises 60 rpm. 29. A system according to claim 28 further comprising an RPM sensor native to a Rotax 914 engine for providing said rotational velocity over a plurality of said rotational cycles. 30. A system for advance detection of detonation and/or pre ignition in an engine, the system comprising: a detonation and/or pre ignition detector operative to provide an alert for impending detonation and/or pre ignition of an engine generating rotational motion whose rotational velocity over time is monitored, if the rotational velocity over a plurality of rotational cycles of said rotation rotational motion fluctuates over time with a frequency which is predetermined to be unsafe. 31. A system according to claim 30 and also comprising an engine generating rotational motion whose rotational velocity over time is monitored. 32. A system according to claim 31 and also comprising a vehicle propelled by the engine. 33. A system according to claim 32 wherein the detonation and/or pre ignition detector resides on-board the vehicle. 34. A system according to claim 31 wherein the engine is operative to propel a vehicle, the system also comprising a vehicle control station remote from the vehicle and wherein said detonation and/or pre ignition detector resides within the vehicle control station. 35. A system according to claim 31 wherein said engine comprises an internal combustion engine. 36. A system according to claim 35 wherein said internal combustion engine comprises a piston engine. 37. A system according to claim 30 and also comprising an aircraft control station operative to control a structure capable of being airborne from the ground, and wherein said detonation and/or pre ignition detector resides within the aircraft control station. 38. A system according to claim 30 further comprising an RPM sensor native to a Rotax 914 engine for providing said rotational velocity over a plurality of said rotational cycles. 39. A method for advance detection of detonation and/or pre ignition in an engine, the method comprising: providing an alert for impending detonation and/or pre ignition of an engine generating rotational motion whose rotational velocity over time is monitored, if the rotational velocity over a plurality of rotational cycles of said rotational motion fluctuates over time with a frequency which is predetermined to be unsafe. 40. A method according to claim 39 further comprising providing, via an RPM sensor native to a Rotax 914 engine, said rotational velocity over a plurality of said rotational cycles. 41. A method for operating aircraft with advance detection of detonation and/or pre ignition, the method comprising: providing an engine airlifting a structure capable of being airborne by generating rotational motion whose rotational velocity over time is monitored; andproviding an alert for impending detonation and/or pre ignition of the engine, if the rotational velocity over a plurality of rotational cycles of said rotational motion fluctuates over time with a frequency which is predetermined to be unsafe. 42. A method according to claim 41 further comprising providing, via an RPM sensor native to a Rotax 914 engine, said rotational velocity over a plurality of said rotational cycles. 43. A computer program product, comprising a computer usable medium having a computer readable program code embodied therein, said computer readable program code adapted to be executed to implement a method for advance detection of detonation and/or pre ignition in an engine, the method comprising: monitoring rotational velocity of an engine over time and over a plurality of rotational cycles;providing an alert for impending detonation and/or pre ignition of the engine generating rotational motion whose rotational velocity over time is monitored, if the rotational velocity over a plurality of rotational cycles of said rotational motion fluctuates over time with a frequency which is predetermined to be unsafe; andactivating a detonation and/or pre ignition retardation action to control the engine responsive to said alert. 44. A computer program product according to claim 43 further comprising causing an RPM sensor native to a Rotax 914 engine to provide said rotational velocity over a plurality of said rotational cycles.
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이 특허에 인용된 특허 (5)
Nanyoshi Yasutoshi (Hyogo JPX) Matsumura Toshio (Kanagawa JPX), Combustioning condition monitoring system for internal combustion engine.
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