摘要:
A vehicle traction system includes a first traction wheel forming part of a first propulsion system including a mechanical drive train, a second traction wheel forming part of a second propulsion system including a hydraulic pump for powering a hydraulic motor, one sensor indicating a take-off condition, and a control unit for controlling the second propulsion unit. The control unit is programmed to automatically detect a take-off condition by the sensor and send an input to the control unit that a take-off condition is fulfilled, automatically provide a traction force from the second propulsion system in response to the indication that there is a take-off condition of the vehicle present and an indication that a traction is or will be provided by the first traction system, and automatically control the second propulsion unit by the control unit in dependence of the manually controlled torque from the first propulsion unit.
摘要:
A system and a method for operating an engine of a vehicle are provided wherein a transmission coupled to the engine has a freewheeling mode. The engine is switched off by setting the transmission into the freewheeling mode and interrupting fuel supply to the engine in the freewheeling mode depending on one or more operating conditions of the vehicle. A gear in the transmission is selected proactively depending on one or more operating actions of the vehicle anticipated to be required on or within a predefined time limit after restart of the engine.
摘要:
A vehicle includes a front axle and rear axle, where at least one of said axles is driven, an engine arranged in the vicinity of the rear or front end of said vehicle, the engine including an output shaft connected to the driven axle via a transmission system for transmitting driving power from the engine to the driven axle. The transmission system includes at least a multiple-speed gearbox for causing variable gear ratio between the engine and driven axle. The engine and at least a part of the gearbox are arranged on each side of the driven axle, and are connected only via a power transmitting device so that an engine block of the engine is separated from a gearbox housing of the gearbox.
摘要:
In a method for controlling a traction system for a heavy road vehicle, the system includes a first mechanical propulsion system, a second hydraulic propulsion system, and a control unit. The method includes measuring a first parameter value, indicative of the rolling radius of a first traction wheel, measuring a second parameter value, indicative of the rolling radius of a second traction wheel, and the control unit using the first and second parameter values for determining a present relation between the rolling radii of the first and second traction wheels. The control unit provides an output signal based on the present relation to optimize the traction applied to the second traction wheel. A traction system and a heavy vehicle incorporating a traction system are also provided.
摘要:
A cast steering knuckle for a vehicle such as a truck includes a knuckle body. One or more pipes, each including a pipe body, are moulded into the knuckle body providing a duct for a fluid and/or one or more electrical harnesses.
摘要:
A range gearbox of planetary type designed to be joined to a vehicle gearbox, a so-called basic gearbox. The ring gear of the planetary gear set is non-rotatably jointed to an engaging sleeve by which the ring gear can be locked to an engaging ring fixed to the rear end wall of the gearbox, or to an engaging ring joined to the planetary gear carrier. The engaging sleeve serves as a ring gear carrier displacing the ring gear axially when shifting range modes.
摘要:
A vehicle traction system includes a first traction wheel forming part of a first propulsion system including a mechanical drive train, a second traction wheel forming part of a second propulsion system including a hydraulic pump for powering a hydraulic motor, one sensor indicating a take-off condition, and a control unit for controlling the second propulsion unit. The control unit is programmed to automatically detect a take-off condition by the sensor and send an input to the control unit that a take-off condition is fulfilled, automatically provide a traction force from the second propulsion system in response to the indication that there is a take-off condition of the vehicle present and an indication that a traction is or will be provided by the first traction system, and automatically control the second propulsion unit by the control unit in dependence of the manually controlled torque from the first propulsion unit.
摘要:
A system and a method for operating an engine of a vehicle are provided wherein a transmission coupled to the engine has a freewheeling mode. The engine is switched off by setting the transmission into the freewheeling mode and interrupting fuel supply to the engine in the freewheeling mode depending on one or more operating conditions of the vehicle. A gear in the transmission is selected proactively depending on one or more operating actions of the vehicle anticipated to be required on or within a predefined time limit after restart of the engine.
摘要:
A method for manufacturing at least one frame member for use as a support element in a vehicle frame includes providing a tubular element. According to the method, a pressure is applied in the interior of the tubular element while the tubular element is positioned at least partly inside a mould, thereby causing the tubular element to conform to the internal shape of said mould so as to change the longitudinal extension direction and/or cross-section of the tubular element in at least one position along the tubular element. A frame member is also provided.
摘要:
In a system and a method of stabilizing a vehicle combination of a towing vehicle and a trailer or a semi-trailer, wherein a trailer brake system on the trailer or semi-trailer which may be operated together with the a vehicle brake system on the towing vehicle as well as independent from said vehicle brake system, the system and method includes: detecting at least one signal corresponding to at least one driving condition; computing the detected at least one signal corresponding to said at least one driving condition and comparing the at least one detected signal with a corresponding predetermined values representing a critical driving condition; allowing independent operation of the trailer brake system in response to a detected critical driving condition; and automatically operating the trailer brake system in response to the activation means by applying temporary braking actions on the trailer. Hereby, a proactive stabilising trailer brake system, also known as stretch-braking, is provided.