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CLUTCH PEDAL DEACTIVATION WHEN CHANGING DIRECTION OF TRAVEL OF A VEHICLE

IP.com Disclosure Number: IPCOM000249756D
Publication Date: 2017-Mar-31
Document File: 6 page(s) / 107K

Publishing Venue

The IP.com Prior Art Database

Abstract

The present solution relates to a system and a method for deactivating the clutch of a vehicle if a driving direction as selected by means of a gear selector deviates from the driving direction in which the vehicle will move according to the currently engaged gear of a gearbox. The clutch, and optionally also the accelerator, is deactivated until a change of gear to a gear that correspond to the direction of travel selected by the driver of the vehicle has been performed.

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CLUTCH PEDAL DEACTIVATION WHEN CHANGING DIRECTION OF TRAVEL OF A VEHICLE

ABSTRACT

The present solution relates to a system and a method for deactivating the clutch of a vehicle if a driving direction as selected by means of a gear selector deviates from the driving direction in which the vehicle will move according to the currently engaged gear of a gearbox. The clutch, and optionally also the accelerator, is deactivated until a change of gear to a gear that correspond to the direction of travel selected by the driver of the vehicle has been performed.

BACKGROUND

Vehicle transmissions may include a clutch or other kinds of torque transmission means that can be used to selectively interrupt transmission of torque in a vehicle drivetrain. Even though gear changing operations may be arranged to be performed automatically by the vehicle control system in systems of this kind, e.g. a clutch pedal or similar means may still be used to allow the driver additional freedom of control of the propulsion of the vehicle by selectively manoeuvring the clutch when so is desired. In particular, the clutch may be used by the driver e.g. to control start of the vehicle, or e.g. cause the vehicle to only slowly move forward through the use of a slipping clutch.

The torque transmitting means such as a clutch may be arranged to be controlled solely by the driver, e.g. by a mechanical linkage between clutch pedal and clutch and thereby with no influence from the vehicle control system.

The system may also be designed such that the clutch pedal may still be used by the driver to control the clutch, but not directly through the use of a mechanical linkage. Instead, the clutch may be controlled through the use of a clutch-by-wire (CBW) system. In clutch-by-wire systems, an electrical signal representing e.g. a clutch pedal position is translated into a corresponding request for torque transmission, such as a corresponding clutch movement. For example, a position sensor or other suitable means can be used to detect a position of the driver manoeuvrable means, such as e.g. the position of a clutch pedal. An electrical signal representing this position is then translated into a corresponding driver request regarding e.g. clutch operation, and the vehicle control system controls actual clutch movement in dependence of the signal representing the position of the clutch pedal.

In this way responsibility for controlling the manner in which the clutch is to be manoeuvred may be transferrable between the driver of the vehicle and the vehicle control system so that opening and closing of the clutch may also be completely controlled by the vehicle control system independently from the position of the clutch pedal.

Furthermore, vehicles of the described kind oftentimes comprises a gear selector by means of which at least different driving modes may be selected. Such driving modes may, for example, include at least a mode for driving in a forward direction (e.g. “Drive”) and...