Knocking controller

Abstract

Abstract PURPOSE: To check knocking impact automatically at a specified regulation value after accurate detection by measuring pressure variable in a cylinder. CONSTITUTION: A piezo-electric pick-up 401 held between an ignition plug and engine head which make up a knocking detective circuit 401 detects a pressure difference in a cylinder varying by a knocking. The detected signal is fed to an averaging circuit 500 consisting HPFs of a condensor 501 and resistance 502, which forms a knocking signal proportional to mean knocking energy. And the signal is fed to a comparison circuit 600 to compare with a reference, which determines a knocking level allowable. A crank angle detection circuit 300 consisting of a pick-up coil 302 and a disc 301 mounted on a crank-shaft detects a crank angle signal. Said comparison signal and a crank angle signal are put into a control circuit 200 and the compared result is sent to an ignition circuit 100 to control the ignition timing. COPYRIGHT: (C)1979,JPO&Japio

Inventors

• 👤 Takayuki Kato
• 👤 Kazumasa Washimi
• 👤 Hideo Arakawa
• 👤 Toshimitsu Ito
• 👤 Masakatsu Sanada

Bibliographic Details