Idling speed control for internal combustion engines

Internal-combustion engines – Engine speed regulator – Idle speed control

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

123352, 123360, 123362, F02M 300

Patent

active

044741545

ABSTRACT:
Regulation of idling speed involves the production of a first error signal by comparing engine speed with a reference idling speed, and then deriving from the first error signal in an amplifying PI controller, proportional and integral components that are added together, for use of the PI sum signal as a reference value signal for the displaceable stop position. The latter is compared to the actual stop position to provide a second error signal for control of electro-pneumatic valves of a positioning device that displaces the stop. Both the proportional and integral components produced in the controller vary assymetrically about the reference idling speed, so that regulation operates more strongly when the engine speed is too low than when it is too high, except for a dead zone on either side of the reference idling speed. When the driver actuates the throttle, a switch signal designates that the idling condition is no longer present and a lower engine speed threshold defines a starting mode of operation at lower speeds and a higher engine speed threshold distinguishes the "drive" mode from the partial load mode. Suitable operations of the displaceable stop during mode transitions and during operations in non-idling modes are provided. The controller output at the end of the last idling interval is stored for use when the engine returns to the idling mode.

REFERENCES:
patent: 3575256 (1971-04-01), Jania et al.
patent: 3964457 (1976-06-01), Coscia
patent: 4098242 (1978-07-01), Anderson
patent: 4365601 (1982-12-01), Yamazoe et al.
patent: 4370960 (1983-02-01), Otsuka
patent: 4401075 (1983-08-01), O'Keefe, Jr. et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Idling speed control for internal combustion engines does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Idling speed control for internal combustion engines, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Idling speed control for internal combustion engines will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-522299

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.