System for measuring the duration ratio of pulses of variable fr

Details System for measuring the duration ratio of pulses of variable fr System for measuring the duration ratio of pulses of variable fr

1987-04-07

1989-06-20

Arnold, Bruce Y.

Boots, shoes, and leggings

364486, 324 78Q, 328136, G01R 2902, H03K 526

Patent

active

048414514

ABSTRACT:
In a system for measuring the duration ratio of pulses of variable frequency, particularly in electronically controlled fuel-injection systems for internal-combustion engines, there are derived clock pulses to the frequency of which a predetermined multiple of the frequency of the pulses (input pulses) corresponds. The duration ratio is then determined by counting the clock pulses during each one pulse. For duration ratios of 0% and 100%, corresponding values are delivered independently of the counting.

REFERENCES:
patent: 4476832 (1984-10-01), Fujimori et al.
patent: 4600994 (1986-07-01), Hayashi

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