Fluidic fuel injection system having transient engine condition responsive means to controllably effect the quantity of fuel injected |
|||||||
| 申请号 | US3771505D | 申请日 | 1972-03-30 | 公开(公告)号 | US3771505A | 公开(公告)日 | 1973-11-13 |
| 申请人 | BENDIX CORP; | 发明人 | TAPLIN L; | ||||
| 摘要 | A fluidic fuel injection system to provide intermittent injection of fuel to an internal combustion engine is disclosed herein. The system receives fluid signals from various sensors and circuits to indicate engine operating parameters and processes these signals through a pulse generator and a pulse computer to provide an output fluid pulse to be applied to various injector valve means to control those injector valve means to deliver metered quantities of fuel to the associated engine. The pulse generator means is adapted to receive both pulse (digital) and variable level (analog) signals having varying responsiveness to the associated engine parameter in order to compensate for rapidly changing and slowly changing operating conditions of the engine and to generate a pulse (digital) output signal. The fluidic circuits to which the pulse generator is responsive include speed pulse signal generating means, speed compensation means, starting and warm-up enrichment means as well as timing phase adjustment means. The pulse generator means is primarily responsive to the speed pulse signal and a signal indicative of the engine manifold pressure to generate a basic pulse whose duration may be modified by one or more of the previously mentioned circuits. The pulse computer operates to extend the duration of the pulse produced by the pulse generator to provide additional time for resetting of the pulse generator prior to the generation of the next following pulse. Additionally, means are illustrated for controllably varying the output of the pulse computer in response to an engine operating parameter to provide further control flexibility. | ||||||
| 权利要求 | 1. An intake manifold equipped internal combustion engine intermittent injection fluidic fuel control system comprising: fuel supply means associated with the engine and including at least one fuel injection valve means operatiVe to discharge metered amounts of fuel for consumption by the engine; speed signal generating means associated with the engine operative to generate a fluidic pulse train signal having a characteristic indicative of engine speed; pressure sensing means associated with the intake manifold operative to generate a signal having a level proportional to intake manifold pressure; pulse generator means in fluid communication with said pressure sensing means and said speed signal generating means, said generating means including means responsive to said speed signal operative to generate a signal having a value which increases monotonically with time from the initiation thereof and means operative to compare said pressure signal level of the pressure sensing means with the monotonically varying characteristic of the generated signal of the speed signal generating means thereby providing an output pulse train indicative of the occurrence of a predetermined relationship between said signals, the duration of the output pulses being indicative of the substantially simultaneous engine fuel requirement; and pulse computer means responsive to the output pulse train of said pulse generator means and operative to generate a second output pulse train to intermittently actuate the injector valve means, the duration of the pulses of the second output pulse train being at least equal to the duration of the pulses generated by the pulse generating means plus a predeterminable amount thereby having a pulse length representative of the engine fuel requirement. 2. The system as claimed in claim 1 wherein said pulse generator means is adapted to generate a pulse train output in response to the speed signal generating means pulse train input, the pulses of the output pulse train having a one-to-one correspondence with the pulses of the input pulse train. 3. The system as claimed in claim 1 wherein the pulses of the pulse generator means output pulse train and the pulses of the pulse computer means output pulse train have a one-to-one correspondence. 4. The system as claimed in claim 1 including fluidic deceleration fuel cutoff means operative to generate a signal for receipt by the pulse generator means to inhibit said pulse generator means from producing a pulse train output signal during selected engine decelerations. 5. The system as claimed in claim 4 wherein said deceleration fuel cutoff means comprise: throttle position sensing means operative to generate a signal indicative of a deceleration condition; reference signal generating means operative to generate a signal having a predetermined pulse frequency; and comparison means receiving said throttle position signal, said reference signal and said speed signal operative to generate an output signal whenever the speed signal indicates an engine speed in excess of the speed represented by the reference signal and a deceleration condition exists. 6. The system as claimed in claim 1 wherein said pulse computer means further include control means to selectively vary the predeterminable amount. 7. The system as claimed in claim 6 including further engine temperature responsive means sensing engine temperature operative to generate a fluid signal having a variable characteristic representative of engine temperature and means, including conduit means, operative to apply said signal to said pulse computer means control means to provide the control for selectively varying the predeterminable amount. 8. The system as claimed in claim 1 wherein said speed signal generating means comprise: primary speed signal generator means responsive to engine speed operative to generate an output pulse train having a pulse frequency representative of engine speed; and secondary speed signal generator means responsive to said primary generator means signal operative to generate a secondary pulse train signal having pulses occurring in timed one-to-one relationship with the pulses of the primary generator means siGnal and having a magnitude which monotonically increases from the time of initiation thereof. 9. The system as claimed in claim 8 including further additional generator means intermediate said primary generator means and at least a portion of said secondary generator means responsive to the pulses of said primary generator means pulse train operative to generate short duration fluidic spike pulses and delay means operative to delay, in time, said spike pulses. 10. The system as claimed in claim 9 wherein said secondary generator means comprise a fluidic proportional amplifier having a pair of opposed control nozzles and a pair of outlet passages, one of said pair of opposed control nozzles arranged to receive said primary generator means pulse train and the other of said pair of control nozzles arranged to receive said fluid spike, said fluid spike operative to terminate the secondary generator means pulse train signal. 11. The system as claimed in claim 8 including phase adjustment means in fluid communication with one of said pulse generator means control inputs arranged in opposition to the pulse generator means control input receiving the speed signal pulses, operative to adjustably control the time relationship of the initiation of pulse generator means output pulse relative to the initiation of a primary generator means pulse. 12. The system as claimed in claim 8 including further fluidic speed compensation means arranged to receive said primary generator means signal and a signal from said pressure sensing means indicative of engine operation operative to produce an output signal for receipt by said pulse generator means having a magnitude indicative of the need for enrichment quantities of fuel over selected ranges of engine speed and engine operation. 13. The system as claimed in claim 1 including further engine temperature responsive means sensing engine temperature operative to generate an output pulse train signal having a frequency which is indicative of sensed temperature and means, including conduit means, for applying said signal to said pulse generator means to selectively control the generated output pulses produced thereby. 14. The system as claimed in claim 13 wherein said applying means further include pulse averaging means operative to convert said output pulse train signal into an analog signal having a variable pressure level. |
||||||
| 说明书全文 | |||||||
QQ群二维码
意见反馈
意见反馈