| 摘要 |
1,208,571. Fuel Injection electrical control systems for I.C. engines. ASSOCIATED ENG. Ltd. Feb.1, 1968 [Feb. 8, 1967], No.6101/67. Heading G1N. A fuel injection control system for vehicle I. C. engines includes a discriminator circuit, Fig. 1, which produces an output voltage having a desired characteristic in relation to engine speed (e. g. as shown Fig. 2 or as in Figs. 3a to 3l (not shown). The discriminator output voltage is used as a component of a control voltage fed to a control pulse generating circuit, not described (e. g. voltage V 1 in circuit Fig. 2 of Specification 1, 107, 989), the duration of pulses from which controls the duration of injection period. The discriminator includes a mono-stable multi-vibrator TR 1 , TR 2 which is triggered to its unstable state by pulses from a distributer D occurring at a rate proportional to engine speed. The multi-vibrator produces output pulses of constant width independent upon the rate of triggering, which pulses are integrated in integrating circuits one of which comprising TR 3 RV 2 , C6 produces an output at low engine speeds and the other of which comprising TR 4 , RV, C5 produces an output at high engine speeds. The integrator outputs voltages at the emitters of TR 3 , TR 4 are linearly proportional to engine speed and are combined at amplifier TR 5 to produce the output characteristic of the discriminator circuit which appears at the emitter of TR6. Either the high speed integrator or low speed integrator may be omitted. |
