EP0427913B1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Process for adapting the regulation speed of the governor of the injection pump of an air compressing combustion engine driving a vehicle to the running resistances exerted on the vehicle

Assignee: Daimler Benz AG

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Filing: 1990-06-26

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Granted: 1994-02-23

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Expires: 2010-06-26

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Abstract

Abstract A process for adapting the regulation speed of the governor of the injection pump of an internal-combustion engine driving a vehicle to the running resistances exerted on the vehicle is described in which the final cut-off characteristic is shifted towards higher internal combustion engine speeds as the running resistance exerted on the vehicle increases. In order not to have to match the actual final cut-off speed to the actual transmission ratio, it is proposed to first determine a reference running resistance corresponding to the vehicle's conditions of use, and with the aid of this to determine that ratio (reference ratio) which, on the basis of the reference running resistance after turning of the internal combustion engine up to the maximum admissible speed, still gives a connection speed after a predetermined period in the next highest transmission stage which is in the maximum torque range of the internal combustion engine. The actual final cut-off speed is ultimately determined as a function of this reference ratio and the actual running resistances. <IMAGE>

Inventors

👤 Jürgen Götz
👤 Jochen Horwath
👤 Claus Kochendörfer

Bibliographic Details

Application Number —

Jurisdiction EP

Data Source google_patents

Last Synchronized 2026-11-03 16:09

CPC Classifications

F; F02; F02D; F02D31/00; F02D31/001; F02D31/007; F02D31/009

Claims Analysis

Total Claims: 5

Claim 1

Independent Claim 215 words

A process to adjust the top regulation speed of the regulator in the fuel injection pump in an air compressed, fuel injected internal combustion engine used to power a vehicle to the resistances affecting the vehicle such that as the vehicle resistances increase the top regulation characteristic line of the regulator shifts towards higher internal combustion engine speeds and vice versa, characterised in that, initially a reference vehicle resistance value (F W,ref ) corresponding to the vehicle operating conditions and then, taking into account the corresponding reference vehicle data and a predetermined gearchange time (t s ) between two transmission stages, a reference delay (a v,ref ) are calculated, that the transmission ratio, known as the reference ratio (i ref ), is then calculated and, on the basis of the previously determined reference delay (a v,ref ) after taking the internal combustion engine up to its maximum permissible speed (n max ) after the predetermined gearchange time (t s ) in the next highest transmission stage, gives a further speed (t target ) within the range of the maximum torque of the internal combustion engine and that in driving mode the actual top regulation speed (n ab ) is calculated dependent on this reference ratio (i ref ) and dependent on the actual vehicle resistance.

Claim 2

Dependent Claim 35 words

A process as per claim 1, characterised in that, the reference vehicle resistance (F W,ref ) is determined from the sum of the reference aerodynamic drag, the reference rolling resistance and the reference gradient resistance.

Claim 3

Dependent Claim 126 words

A process as per claim 2, characterised in that, the reference relative velocity (v rel,ref ) between driving speed and air speed used to calculate the reference aerodynamic drag when mean relative velocity during driving is expected to be large is small and vice versa, that the reference rolling friction value (f ref ) between vehicle tires and the road surface used to calculate the reference friction value when the average rolling friction value during driving is expected to be large is small and vice versa and that the reference angle of gradient of the road surface (α ref ) used to calculate the reference gradient resistance when the average road surface gradient angle during driving is expected to be large is small and vice versa.

Claim 4

Dependent Claim 24 words

A process as per one of claims 1 to 3, characterised in that, the reference ratio (i ref ) is calculated before driving starts.

Claim 5

Dependent Claim 94 words

A process as per claim 1 with a sensor to measure the actual vehicle resistance by means of which an electrical signal corresponding to this value is fed into an electronic control unit which generates a signal to trigger one of the actuators which operate the control rod of the fuel injection pump fitted in the internal combustion engine, characterised in that, from a mobile data carrier (11) via a data line (12) the electronic control unit (5) receives vehicle (2) reference data and the expected vehicle conditions stored in the control unit (5).

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