Browse Prior Art Database

MANUAL CONTROL OF A CLUTCH IN A VEHICLE UNTIL SYSTEM NO LONGER REQUESTS DISENGAGEMENT OF THE CLUTCH

IP.com Disclosure Number: IPCOM000249755D
Publication Date: 2017-Mar-31
Document File: 5 page(s) / 85K

Publishing Venue

The IP.com Prior Art Database

Abstract

The present solution relates to a system and a method for controlling the clutch of a vehicle as requested by a driver in situations where the clutch has been controlled by the driver, but where control is handed over to the vehicle control system. If the vehicle control system, when gaining control of the clutch following a driver initiated closing of the clutch, decides to immediately disengage (open) the clutch, such opening of the clutch is prohibited until neither the control system nor the driver requests an opening of the clutch. In this way the clutch can be maintained closed in accordance with the request of the driver.

This text was extracted from a Microsoft Word document.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 37% of the total text.

MANUAL CONTROL OF A CLUTCH IN A VEHICLE UNTIL SYSTEM NO LONGER REQUESTS DISENGAGEMENT OF THE CLUTCH

ABSTRACT

The present solution relates to a system and a method for controlling the clutch of a vehicle as requested by a driver in situations where the clutch has been controlled by the driver, but where control is handed over to the vehicle control system. If the vehicle control system, when gaining control of the clutch following a driver initiated closing of the clutch, decides to immediately disengage (open) the clutch, such opening of the clutch is prohibited until neither the control system nor the driver requests an opening of the clutch. In this way the clutch can be maintained closed in accordance with the request of the driver.

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.

Regarding transfer of responsibility for controlling the clutch in systems of t...