US5161502A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and arrangement for setting an idle air actuator
Assignee: Robert Bosch GmbH
•
Filing: 1991-12-13
•
Granted: 1992-11-10
•
Expires: 2011-12-13
Abstract
Abstract The invention is directed to a method for adjusting the idle air actuator in the intake system of an internal combustion engine during idle or overrun operation, the method comprising the steps of: transferring the idle air actuator into a non-driven position in a load area outside the idle or overrun operation; continuously monitoring outside of idle and overrun operation as to whether such a change of operating variables takes place which makes a transfer into idle or overrun operation probable; and, if so, driving the idle air actuator with a value which is determined so that the idle air actuator assumes that position, which, when reaching idle or overrun operation, will presumably by substantially the correct position. The method of the invention affords the advantage that the power loss for driving the idle air actuator is considerably reduced without disturbances (caused by intermittent non-driving of the actuator) occurring in the performance of the engine during transitions from the driven into the non-driven state and vice versa.
Inventors
- 👤 Adolf Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:25
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/02; F02D41/14; F02D41/16; F02D31/00; F02D31/001; F02D31/002; F02D31/003
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
113 words
A method for adjusting the idle air actuator in the intake system of an internal combustion engine during idle or overrun operation, the method comprising the steps of: transferring the idle air actuator into a non-driven position in a load area outside of idle or overrun operation; continuously monitoring outside of idle and overrun operation as to whether such a change of operating variables takes place which makes a transition into idle or overrun operation probable; and, if so, driving the idle air actuator with a value which is determined so that the idle air actuator assumes that position, which, when reaching idle or overrun operation, will presumedly be substantially the correct position.
Claim 2
Independent Claim
113 words
A method for adjusting the idle air actuator in the intake system of an internal combustion engine during idle or overrun operation, the method comprising the steps of: transferring the idle air actuator into a non-driven position in a load area outside of idle or overrun operation; continuously monitoring outside of idle and overrun operation as to whether such a change of operating variables takes place which makes a transition into idle or overrun operation probable; and, if so, driving the idle air actuator with a value which is determined so that the idle air actuator assumes that position, which, when reaching idle or overrun operation, will presumedly be substantially the correct position.
Claim 3
Dependent Claim
30 words
The method of claim 1, wherein the value to which the idle air actuator is adjusted with the assumed return to idle or overrun operation is an overrun characteristic value.
Claim 4
Dependent Claim
52 words
The method of claim 1, wherein the last drive value is stored in advance of the transfer of the idle air actuator into said non-driven position; and, said idle air actuator is again driven on the basis of the stored last drive value when said idle air actuator presumedly returns to idle.
Claim 5
Dependent Claim
55 words
The method of claim 3, wherein, when storing the last drive values, the values of operating variables which then apply are also stored; and, when again driving the idle air actuator, the then applicable drive value is determined from the stored drive value as well as the stored and the applicable values of operating variables.
Claim 6
Dependent Claim
48 words
The method of claim 1, wherein the transition from the non-driven into the driven position of the idle air actuator takes place as slowly as possible but yet so rapidly that when reaching idle or the resume engine speed in overrun operation, the required position is possibly present.
Claim 7
Dependent Claim
33 words
The method of claim 5, wherein the drive of the idle air actuator is overdriven for a short time when there is a rapid approach to the idle or the resume engine speed.
Claim 8
Dependent Claim
138 words
An arrangement for setting the idle air actuator in the intake system of an internal combustion engine during idle or overrun operation, the idle air actuator assuming a base position in the non-driven condition, the arrangement comprising: a unit for switching off the drive of the idle air actuator outside of the idle or overrun operation; said unit being adapted for monitoring outside of idle and overrun operation as to whether such changes of operating variables take place that a transition into the idle or overrun operation is probable; and, for driving the idle air actuator, in the event that said transition does take place, with a value determined by a configuration of said unit such that said idle air actuator assumes that position, which, when reaching idle or overrun operation, will presumedly be substantially the correct position.
Claim 9
Dependent Claim
138 words
An arrangement for setting the idle air actuator in the intake system of an internal combustion engine during idle or overrun operation, the idle air actuator assuming a base position in the non-driven condition, the arrangement comprising: a unit for switching off the drive of the idle air actuator outside of the idle or overrun operation; said unit being adapted for monitoring outside of idle and overrun operation as to whether such changes of operating variables take place that a transition into the idle or overrun operation is probable; and, for driving the idle air actuator, in the event that said transition does take place, with a value determined by a configuration of said unit such that said idle air actuator assumes that position, which, when reaching idle or overrun operation, will presumedly be substantially the correct position.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-11-10 | 1996-05-11 | 1996-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-11-10 | 2000-05-11 | 2000-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-11-10 | 2004-05-11 | 2004-11-10 | $7700.00 | Window Closed / Lapsed |