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Method and vehicle electric system for a motor vehicle with a pre-emptive temporary increase in the idling speed of the internal combustion engine

A technology for on-board electrical appliances and engines, applied in engine control, machine/engine, power steering mechanism, etc., can solve problems such as high requirements for on-board electrical network stability of automobiles

Active Publication Date: 2009-12-16
BAYERISCHE MOTOREN WERKE AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such electrical devices may place high power demands on the vehicle's on-board electrical network in a short period of time
This also results in high requirements for the stability of the automotive electrical network

Method used

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  • Method and vehicle electric system for a motor vehicle with a pre-emptive temporary increase in the idling speed of the internal combustion engine
  • Method and vehicle electric system for a motor vehicle with a pre-emptive temporary increase in the idling speed of the internal combustion engine
  • Method and vehicle electric system for a motor vehicle with a pre-emptive temporary increase in the idling speed of the internal combustion engine

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Embodiment Construction

[0024] The starting point for the following exemplary embodiments of the method according to the invention is as follows: The motor vehicle is equipped with an electric steering system. The electric steering gear needs a high enough voltage to perform a turning maneuver or turning process, even if the car's battery and generator together supply power to the on-board electrical network, for example, both of them have already exerted their maximum power to a large extent, but Still can not provide such a high voltage. This can be the case especially in winter when electric seat heaters and / or other energy consumers with high electrical power are connected. If no corresponding countermeasures are taken for cornering maneuvers in such cases, the additional load of the electric steering unit will cause a significant drop in the voltage on the on-board electrical network, because the steering unit must provide a high mechanical torque during the cornering process, and the steering w...

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Abstract

The invention relates in particular to a method for reducing the energy consumption of a motor vehicle comprising an internal combustion engine and at least one vehicle electric system, to which at least one electrical consumer is connected. To achieve a high performance vehicle electric system with a reduced energy consumption, the internal combustion engine is operated in a first operating mode at a first speed. In a second operating mode the internal combustion engine is operated at a second speed that is higher than the first. A device for detecting the driving situation, which is provided in the vehicle, identifies an imminent specific driving situation (304) on the basis of the previous behaviour of the driver (102, 104, 105, 107, 108, 110, 111, 201, 205, 206, 210, 212, 213, 302, 303, 401, 403) when controlling the vehicle and / or the behaviour of the vehicle in advance and initiates a switch in operating modes of the internal combustion engine from the first operating mode to the second operating mode.

Description

technical field [0001] In particular, the invention relates to a method for reducing energy consumption of a vehicle with an engine and at least one vehicle electrical network connected to at least one first consumer. Background technique [0002] The number of electrical devices in a car has increased significantly. In order to reduce the CO of the car 2 Emissions, more and more energy-consuming equipment that works hydraulically is replaced by electricity-consuming equipment. Thus in a given situation, for example an electric steering system (EPS) of a car replaces a hydraulic steering system. However, such electrical consumers may place high power demands on the vehicle's on-board electrical network within a short period of time. This also results in high requirements for the stability of the automotive electrical network. Especially when high loads occur for a short period of time, a sufficiently high voltage or electrical power must be available. Contents of the i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60R16/02B62D6/00B62D5/04
CPCF02D41/083B62D5/0457B62D5/0475
Inventor O·莱姆基M·豪施尔德
Owner BAYERISCHE MOTOREN WERKE AG
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