Automatic choke

Details Automatic choke Automatic choke

2007-10-23

2007-10-23

Cronin, Stephen K. (Department: 3747)

Internal-combustion engines

Starting device

With fuel or intake air control

C123S399000, C123S403000

Reexamination Certificate

active

11075668

ABSTRACT:
A choke valve is controlled finely suited to the running state of an engine. A throttle valve8and a choke valve9are provided in series on an intake pipe6, and the opening degree of the choke valve9is controlled by a stepping motor11.A choke valve opening degree upon start of engine (start opening degree) and a driving pulse rate of a stepping motor11are determined depending on the engine temperature. When lower than the engine temperature TL, the pulse rate is set at first rate, or the lowest rate in a specified range. Depending on the engine temperature, the pulse rate is set higher gradually up to second rate TH. When releasing the choke gradually in warm-up operation, the pulse rate is lowered so as to obtain a choke opening degree of high precision by a high torque.

REFERENCES:
patent: 3948240 (1976-04-01), Hirosawa et al.
patent: 4200064 (1980-04-01), Engele
patent: 4321902 (1982-03-01), Stoltman
patent: 4391249 (1983-07-01), Bianchi et al.
patent: 4463723 (1984-08-01), Tansuwan
patent: 4500478 (1985-02-01), Furukawa et al.
patent: 4524742 (1985-06-01), Bonfiglioli et al.
patent: 4623322 (1986-11-01), Melchior
patent: 5031593 (1991-07-01), Erhard et al.
patent: 1 323 911 (2003-07-01), None
patent: 02238162 (1990-09-01), None
patent: 5-280425 (1993-10-01), None

Affiliated with

Also associated with

Rating

Automatic choke does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Automatic choke, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic choke will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3877200