Fuel octane responsive internal combustion engine ignition syste

Details Fuel octane responsive internal combustion engine ignition syste Fuel octane responsive internal combustion engine ignition syste

1985-03-28

1986-12-23

Dolinar, Andrew M.

Internal-combustion engines

Combustion chamber means combined with air-fuel mixture...

123421, F02P 5145

Patent

active

046305840

ABSTRACT:
In order to simultaneously prevent engine damage due to violent knocking and maintain good fuel economy, an ignition control system firstly controls the ignition timing according to a first schedule suited for fuel having a first octane rating until the engine enters a preselected mode of operation. At this time the ignition is advanced until knocking occurs. The conditions under which the knocking is generated are compared with prememorized data and if this reveals that the octane value of the fuel is higher than that for which the first schedule is suited control is switched to a second schedule designed for fuel having a second and higher octane value.

REFERENCES:
patent: 4376429 (1983-03-01), Youngblood
patent: 4471736 (1984-09-01), Yoshida et al.

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