Internal-combustion engines – Engine speed regulator – Idle speed control
Patent
1986-06-09
1987-10-27
Argenbright, Tony M.
Internal-combustion engines
Engine speed regulator
Idle speed control
123179L, F02D 4116, F02M 307
Patent
active
047022108
ABSTRACT:
Feedback control of the opening area of a bypass which is provided in parallel with a throttle valve of an engine is conducted immediately after the cranking is completed, based on the deviation of existing RPM from the target RPM which is memorized as the function of the engine temperature in advance, to maintain the idling RPM of the engine at optimum level in the state of after-cranking without being affected by the possible change in viscosity of engine oil, the variations in temperatures of the ambient air and the engine cooling water, the load of engine, and so on. The control signals for the feedback control are learned when the existing RPM are substantially equal to the target RPM and stored in a memory. One of the learned values is read out for fixing a control signal in the beginning of the state of after-cranking so that the RPM of the engine is smoothly approximated to the target RPM when the engine shifts from the during-cranking state to the idling state.
REFERENCES:
patent: 4444168 (1984-04-01), Matsumura et al.
patent: 4469064 (1984-09-01), Manaka et al.
Kiuchi Takeo
Yasuoka Akimasa
Argenbright Tony M.
Honda Giken Kogyo Kabushiki Kaisha
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