Changing Gear Ratio in a Gearbox of a Vehicle

• Main Author: Tomas SELLING
• Format: Patent
• Language: English; Swedish
• Published: 17.04.2018
• Subjects: ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS INVEHICLES; ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OFTRANSMISSIONS IN VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GASEXHAUST OR FUEL SUPPLY OF PROPULSION UNITS, IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; BLASTING; BRAKES; CLUTCHES; CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE ORDIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; COUPLINGS FOR TRANSMITTING ROTATION; ENGINEERING ELEMENTS AND UNITS; GEARING; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; LIGHTING; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TOTHE CONTROL OF A PARTICULAR SUB-UNIT; THERMAL INSULATION IN GENERAL; TRANSPORTING; VEHICLES IN GENERAL; WEAPONS

The invention relates to a method for changing gear ratio in a gearbox (2) of a vehicle (1), said gearbox (2) being arranged to transfer torque in a powertrain (3) between a power source (4) and at least one drive wheel (8) of said vehicle (1), said gearbox (2) being controllable to engage at least two gears having different gear ratios, the method comprising steps of:- applying a first force (F) acting on an engaging element (43) arranged between said gearbox (2) and said at least one drive wheel (8);- decreasing torque (T) generated by the power source (4);- disconnecting said gearbox (2) from said at least one drive wheel (8) by means of the first force (F) acting on the engaging element (43) when the first force (F) overcomes a reaction force (F) acting on the engaging element (43), which reaction force (F) is a result of a torque (T) transferred by the engaging element (43);- changing gear ratio of said gearbox (2) when the gearbox (2) is disconnected from said at least one drive wheel (8); and- connecting said gearbox (2) to said at least one drive wheel (8) when said gear ratio of said gearbox (2) has been changed. The invention also relates to a computer program comprising program code, a system for changing gear ratio in a gearbox (2) of a vehicle (1), and a vehicle (1).