Document Type and Number:
Japanese Patent JPH0154536
Kind Code:
B2
Abstract:
An engine comprising a main intake passage having a throttle valve therein. A bypass passage is branched off from the main intake passage located upstream of the throttle valve and is connected to the main intake passage located downstream of the throttle valve. A flow control valve, actuated by a step motor, is arranged in the bypass passage. The step motor is controlled by an electronic control unit having three memories. The data, indicating the step position of the step motor, is stored in the three memories at the same time. When at least two pieces of data among the data stored in the three memories are the same, it is determined that the two pieces of data are considered as true data indicating the actual step position of the step motor.
Inventors:
YAMAUCHI YASUTAKA
ITO HIROSHI
ITO HIROSHI
Application Number:
JP12423881A
Publication Date:
November 20, 1989
Filing Date:
August 07, 1981
Export Citation:
Assignee:
NIPPON DENSO KK
TOYOTA JIDOSHA KK
TOYOTA JIDOSHA KK
International Classes:
F02D41/16; F02D31/00; F02D41/34; F02M69/32; G05D13/66; F02B75/02
Next Patent: JPH0154537