Uphill start-up assistance device for motor vehicle

• US 20060106520A1
• Filed: 07/30/2002
• Published: 05/18/2006
• Est. Priority Date: 08/07/2001
• Status: Active Grant

• Current Assignee: Renault Sas (Renault)
• Original Assignee: Renault Sas (Renault)
• Inventors: Szymanski, Joel, Devaud, Emmanuel, Bodin, Pascal
• Granted Patent: US 7,206,682 B2
• Time in Patent Office: Days
• US Class Current: 701/67
• CPC Class Codes: B60T 2201/06 Hill holder; Start aid systems on inclined road
• CPC Class Codes: B60T 7/122 for locking of reverse movement
• CPC Class Codes: B60W 10/02 including control of driveline clutches
• CPC Class Codes: B60W 10/184 with wheel brakes
• CPC Class Codes: B60W 2050/0045 using databus protocols
• CPC Class Codes: B60W 2050/0052 Filtering, filters
• CPC Class Codes: B60W 2510/1005 Transmission ratio engaged
• CPC Class Codes: B60W 2510/186 Status of parking brakes
• CPC Class Codes: B60W 2520/30 Wheel torque
• CPC Class Codes: B60W 2540/10 Accelerator pedal position
• CPC Class Codes: B60W 2540/106 Rate of change
• CPC Class Codes: B60W 2552/15 Road slope, i.e. the inclination of a road segment in the longitudinal direction
• CPC Class Codes: B60W 2710/105 Output torque
• CPC Class Codes: B60W 30/18027 Drive off, accelerating from standstill
• CPC Class Codes: B60W 30/18118 Hill holding
• CPC Class Codes: F16D 2500/10412 Transmission line of a vehicle
• CPC Class Codes: F16D 2500/30421 Torque of the output shaft
• CPC Class Codes: F16D 2500/3065 Torque of the engine
• CPC Class Codes: F16D 2500/3067 Speed of the engine
• CPC Class Codes: F16D 2500/30806 Engaged transmission ratio
• CPC Class Codes: F16D 2500/3107 : Vehicle weight
• CPC Class Codes: F16D 2500/3115 : Vehicle wheel speed
• CPC Class Codes: F16D 2500/3117 : Vehicle wheel torque
• CPC Class Codes: F16D 2500/3125 : Driving resistance, i.e. external factors having an influence in the traction force, e.g. road friction, air resistance, road slope
• CPC Class Codes: F16D 2500/3142 : Clutch pedal position rate
• CPC Class Codes: F16D 2500/3144 : Accelerator pedal position
• CPC Class Codes: F16D 2500/3166 : Detection of an elapsed period of time
• CPC Class Codes: F16D 2500/5023 : Determination of the clutch wear
• CPC Class Codes: F16D 2500/50825 : Hill climbing or descending
• CPC Class Codes: F16D 2500/7044 : Output shaft torque
• CPC Class Codes: F16D 2500/7049 : Brake parameters
• CPC Class Codes: F16D 2500/70668 : Signal filtering
• CPC Class Codes: F16D 48/06 : Control by electric or electronic means, e.g. of fluid pressure
• CPC Class Codes: F16D 48/08 : Regulating clutch take-up on starting

Abstract

A device for uphill start-up assistance for a motor vehicle including a control for controlling release of the vehicle mechanical brakes that act on the vehicle wheels, so that the vehicle is maintained on the slope when maneuvering uphill without any intervention from the driver on this maintaining condition. The control uses mainly the state of the slope, the interpretation and anticipation of the commands of driver and/or of a central driving member, and the determined instantaneous clutching characteristics. In a preferred embodiment, the assistance device co-operates with an electrical device of the parking brake.

Claims