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Control system for a plug-in hybrid vehicle, and a method of controlling a plug-in hybrid vehicle

IP.com Disclosure Number: IPCOM000241922D
Publication Date: 2015-Jun-09
Document File: 8 page(s) / 60K

Publishing Venue

The IP.com Prior Art Database

Abstract

The charging of the battery storage (23) of a hybrid vehicle is time-consuming so it is beneficial to charge the hybrid vehicle whenever possible. This problem is solved by a plug-in hybrid vehicle comprising a wake-up function (20) configured to keep at least part of the control system (1) of the vehicle active when the vehicle is turned off by the driver by means of the key or the key-less switch (30). Especially, the wake-up function is configured to output (40) a reminder to the driver to charge the vehicle. Before reminding the driver; the wake-up function may monitor the charging level of the battery storage (23), determine whether or not the parking brake (50) is applied, and determine whether or not the gear (60) is in neutral

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Control system for a plug-in hybrid vehicle, and a method of controlling a plug-in hybrid vehicle

BACKGROUND OF THE INVENTION AND PRIOR ART
The invention relates to hybrid vehicles, especially to plug-in

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hybrid vehicles wherein a battery energy storage can be charged by means of an external charging source, such as a charging station, that delivers electrical energy by means of a cable connected by the driver to the hybrid vehicle.

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Plug-in hybrid land vehicles, such as cars, trucks and buses, have been provided that comprises a fuel driven engine and at least one electrical motor driven by means of electrical energy stored in a battery storage in the vehicle.

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The charging of the battery storage is time-consuming so that it is beneficial to charge the vehicle whenever possible. A problem with such a plug-in hybrid vehicle is that the driver may forget to charge the vehicle when the vehicle is parked and the ignition is turned off. When the ignition is turned off, the electronic control

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system stops and turns off its parts, including the electronic control units (ECU) and the user interface that is normally employed for presenting information to the user/driver, such as information indicating the charging level of the energy storage. When the user interface is turned off, there is nothing to remind

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the driver to charge the battery energy storage when the driver parks the vehicle.

The present invention provides a charging method and control system for charging a plug-in hybrid vehicle. 30

SUMMARY OF THE INVENTION
The invention provides a charging method comprising presenting a reminder to the driver or user of the vehicle when the vehicle is parked. Thus, the driver can connect a charging cable to the

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vehicle and the control system of the vehicle can initiate


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charging of the vehicle and ensure that the vehicle is charged without further intervention of the driver.

The invention also provides a control system for performing the method step of reminding the driver, and the subsequent steps

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of charging the battery energy storage of the vehicle.

The invention provides an easy way of ensuring that the vehicle is charged by providing a reminder to the driver and using the driver to plug-in the charging cable in the vehicle at times when

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the driver could forget doing so. In this way valuable time can be saved.

The control system of the invention comprises a wake-up function which is activated when the ignition of the vehicle is

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turned off, and which keeps some parts of the control system alive long enough to remind the driver. In preferred embodiments, the wake-up function use a display screen or a loudspeaker for reminding the driver.

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Figure 1 illustrates an electronic control system 1 of a hybrid vehicle, for example a car, bus or truck. The control system 1 comprises a number of electronic control units 10, 20, 30, 40, 50, 60 configured in a communication network, such as a CAN- system. The contr...