Electronically controlled fuel supply method and device for inte

Details Electronically controlled fuel supply method and device for inte Electronically controlled fuel supply method and device for inte

1993-01-15

1994-10-11

Argenbright, Tony M.

Internal-combustion engines

Charge forming device

Including cylinder pressure or temperature responsive means

123436, F02D 4106

Patent

active

053537645

ABSTRACT:
Based on a combustion pressure detected by a cylinder internal pressure sensor, a mean effective pressure Pi is calculated and a fluctuation amount .DELTA.Pi of the mean effective pressure Pi is calculated. The level of a predetermined frequency component of the fluctuation amount .DELTA.Pi is compared with a predetermined level. When the fluctuation amount .DELTA.Pi exceeds the predetermined value, it is judged that an increasing correction coefficient KTW according to a water temperature is smaller than a required value corresponding to a used fuel, and the increasing correction coefficient KTW is increasingly modified. When the above fluctuation amount .DELTA.Pi is less than the predetermined value, it is judged that the increasing correction coefficient KTW is larger than the required value corresponding to the used fuel, and the increasing correction coefficient KTW is decreasingly modified. Therefore, the increasing correction coefficient KTW according to the water temperature is optimized corresponding to the fuel being used.

REFERENCES:
patent: 4706628 (1987-11-01), Trombley
patent: 5069183 (1991-12-01), Nagano et al.

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