Ignition control apparatus for internal combustion engines

Patent · Tue Mar 17 04:00:00 EST 1987

OSTI ID:6879725

Miyase, Y; Okuda, R; Suzumura, K; Kawai, M; Yamamoto, N; Mase, K; Matsui, T; Mikino, T

This patent describes an ignition control apparatus for an internal combustion engine which controls the energization time of an ignition coil in accordance with a rotation speed of the engine, the apparatus comprising: reference position signal generating means for generating a reference position signal synchronized with a rotation of the engine; computing means for: (1) computing a desired ignition timing in accordance with a magnitude of a load on the engine and a rotation speed of the engine, (2) computing, in accordance with the ignition timing, an energization starting time for the ignition coil, which energization starting time precedes the ignition timing by a predetermined time and (3) generating a signal indicative of the energization starting time and the ignition timing synchronized with the reference position signal; and control means including: (1) primary current detecting means for detecting when a primary current of the ignition coil exceeds a predetermined value and producing a primary current detecting signal indicative thereof, (2) a first integrating means including a first integrating element for initiating an integration in one direction in the first integrating element in synchronization with the energization starting time signal of the computing means and for resetting an integration value of the first integrating element to an initial value in synchronization with the ignition timing signal of the computing means.

• Assignee: Nippondenso Co., Ltd., Kariya
• Patent Number(s): US 4649888
• OSTI ID: 6879725
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
COMPUTERIZED CONTROL SYSTEMS
CONTROL SYSTEMS
ELECTRONIC CIRCUITS
ENGINES
HEAT ENGINES
IGNITION SYSTEMS
INTERNAL COMBUSTION ENGINES
MOTION
POSITIONING
ROTATION
SIGNALS
SYNCHRONIZATION
TIMING CIRCUITS
VELOCITY