US4520694A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of controlling engine operation in an automotive vehicle during gear change
Assignee: Robert Bosch GmbH
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Filing: 1982-09-29
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Granted: 1985-06-04
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Expires: 2002-09-29
Abstract
Abstract To effect soft gear change, without shifting jolts or shocks, the output torque of an automotive vehicular internal combustion engine is controlled in dependence on sensing of an overrunning condition signal derived, for example, by the conjunction of the accelerator pedal being in "idle" or "unoperated" condition, and the engine operating at a speed in excess of idling speed. Use of such an "overrunning condition" signal permits ready control of the engine without requiring additional control elements or systems coupled to the gear change apparatus or to the transmission.
Inventors
- 👤 Gerhard Eschrich
- 👤 Manfred Schwab
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:19
CPC Classifications
B; B60; B60W; B60W30/00; B60W30/18; B60W10/00; B60W10/04; B60W10/10; B60W10/11; B60W30/1819; F; F16; F16H; F16H59/00; F16H59/14; F16H2059/144; F16H63/00; F16H63/40; F16H63/50; F16H63/502
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
125 words
In an automotive vehicle having an engine (10), an accelerator pedal, and a drive train (100), a method of controlling the drive train of the vehicle, said drive train (100) having a transmission (14) driven by the engine (10), and vehicle wheels (18) driven by the transmission (14), wherein the drive train includes means (13) for sensing the direction of power flow between the engine (10) and the wheels (18), and provides an output signal (13s) if the vehicle is operated under overrunning condition, comprising the step of reducing power output of the engine to idling level by producing a simulated overrunning condition signal (15s) during occurrence of a gear change step for a period of time adjusted in accordance with then-pertaining engine speed parameters.
Claim 2
Dependent Claim
125 words
In an automotive vehicle having an engine (10), an accelerator pedal, and a drive train (100), a method of controlling the drive train of the vehicle, said drive train (100) having a transmission (14) driven by the engine (10), and vehicle wheels (18) driven by the transmission (14), wherein the drive train includes means (13) for sensing the direction of power flow between the engine (10) and the wheels (18), and provides an output signal (13s) if the vehicle is operated under overrunning condition, comprising the step of reducing power output of the engine to idling level by producing a simulated overrunning condition signal (15s) during occurrence of a gear change step for a period of time adjusted in accordance with then-pertaining engine speed parameters.
Claim 3
Dependent Claim
48 words
Method according to claim 1, including the steps of sensing (19) speed of the engine; sensing (20) the position of said accelerator pedal; and providing an actual overrunning condition output signal (13s) when (a) said pedal is in "idle" position, and (b) engine speed is above idling speed.
Claim 4
Dependent Claim
40 words
Method according to claim 1, wherein the drive train comprises an overdrive; and wherein, upon gear change including said overdrive, said simulated overrunning condition signal (15s) is applied to the engine to cause reduction of power output from the engine.
Claim 5
Dependent Claim
19 words
Method according to claim 3, wherein the step of reducing power output comprises reducing fuel supply to the engine.
Claim 6
Dependent Claim
31 words
Method according to claim 1, including the step of reducing fuel supply to the engine upon sensing the simulated overrunning condition output signal upon initiation and during a gear change step.
References Cited (Backward Citations)
US3323621A
Cited
US4077283A
Cited
US4226141A
Cited
US4231092A
Cited
JPS558949A
Cited
DE2848624A1
Cited
US4266447A
Cited
DE3026742A1
Cited
FR2448077A1
Cited
US4403527A
Cited
US4370904A
Cited
US4408293A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-06-03 | 1988-12-03 | 1989-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-03 | 1992-12-03 | 1993-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-03 | 1996-12-03 | 1997-06-04 | $7700.00 | Window Closed / Lapsed |