Abstract:
A method for propulsion of a vehicle (100), the vehicle (100) has a combustion engine (101) and a gearbox (103) that can be adjusted to a number of gear ratios for the transfer of force between the combustion engine (101) and at least one driving wheel (113, 114). The engine (101) combustion chamber has at least one inlet for supply of combustion gas and at least one outlet for evacuation of exhaust gas from the combustion chamber, a turbocharger unit (203) for pressurizing the combustion gas in the combustion chamber. During a change of gear from a first higher to a second lower gear ratio, wherein the rate of revolution of the combustion engine (101) is reduced from a first rate to a second rate, increasing the pressure (Put) at the chamber outlet (202) at least through the use of the turbocharger unit for constriction of the exhaust gas flow to reduce the pressure (Pin) at the combustion gas through the opening of a first valve (221) and, when the rate of revolution (n) of the combustion engine (101) has at least partially fallen towards the second rate of revolution (n2), controlling the turbocharger unit (203) such that the combustion gas pressure (Pin) is increased. Also a system and a vehicle are disclosed.
Abstract:
The invention relates to a method of controlling a variable valve timing arrangement of an internal combustion engine, the variable valve timing arrangement being arranged to control the timing of an intake valve and an exhaust valve of the internal combustion engine, the method comprising: controlling the variable valve timing arrangement so as to delay the intake valve lifts and to advance the exhaust valve lifts in response to at least one parameter representative of a current load of the internal combustion engine passing a certain threshold value, thereby indicating that the internal combustion engine is operated in a low load state The invention relates also to a computer program product comprising program code for a computer for implementing a method according to the invention. The invention relates also to a control arrangement and a vehicle comprising the control arrangement.
Abstract:
A method for propulsion of a vehicle (100): The vehicle (100) includes a combustion engine (101), and a gearbox (103) that can be adjusted to a number of gear ratios for transfer of force between the combustion engine (101) and at least one driving wheel (113, 114), at least one combustion chamber with at least one inlet for the supply of combustion gas and at least one outlet for the evacuation of an exhaust gas flow that has resulted from combustion in the combustion chambers and a turbocharger unit (203) for pressurizing the combustion gas. In the method, during the change of gear from a first higher gear ratio to a second lower gear ratio, the rate of revolution of the combustion engine (101) is reduced, to control the turbocharger unit such that the pressure of the combustion gas is reduced, to increase the pressure at the outlet by constriction of the exhaust gas flow, and when the rate of revolution of the combustion engine (101) has at least partially fallen towards a second rate of revolution, to control the turbocharger unit such that the combustion gas pressure is increased. Also a system and a vehicle including the system.
Abstract:
A system for braking a vehicle is provided. The system comprises a powertrain comprising an electric machine arranged to propel the vehicle and a transmission arranged to transfer power between the electric machine and the driving wheels of the vehicle. The system further comprises a resistor device arranged to dissipate electric energy generated by the electric machine during braking of the vehicle, and an airflow generating device arranged to generate an airflow over the resistor device. The airflow generating device is arranged to be mechanically driven by the powertrain so as to generate said airflow. By (mechanically) driving the airflow generating device by means of the powertrain, the airflow generating device does not need its own motor, thereby making the system less complex. Further, the driving of the airflow generating device by means of the powertrain will consume energy itself, contributing to braking the vehicle.
Abstract:
An arrangement for cylinder detection in a four-stroke internal combustion engine is disclosed. The arrangement comprises a first disc connected to a crankshaft, the first disc comprising a first mark (M11-M13) within each an interspace angle (α), and a second disc connected to a camshaft and comprising one second mark (M21-M26) per number of cylinders. The first mark (M11-M13) is arranged on a first disc, or the plurality of first marks (M11-M13) are arranged in relation to each other on the first disc, and the second marks (M21-M26) are arranged in relation to each other on the second disc such that for each interspace angle (α) the relevant first mark (M11-M13) is detectable by a first sensor and the relevant second mark (M21-M26) is detectable by a second sensor at different relative rotational positions between the first disc and the second disc.
Abstract:
A method and a system (200) for providing an auxiliary unit control profile for controlling an auxiliary unit (201) in a motor vehicle (202) including receiving travelling route data relating to a travelling route of the motor vehicle and based thereon, identifying an expected future travelling route. Based on the expected future travelling route and on auxiliary unit operation data, an auxiliary unit control profile for controlling the auxiliary unit during travel along the expected future travelling route is determined in a processing unit (204). The auxiliary unit control profile is outputted to a control unit (206) configured to execute the auxiliary unit control profile and control the auxiliary unit based on the auxiliary unit control profile.
Abstract:
Method for estimation of a mean torque generated by a combustion engine with at least two cylinders, comprising to generate an engine speed vector, wherein several measuring values representing the instantaneous engine speed of the engine, are registered, to determine the respective n:th highest and the n:th lowest value of the engine speed vector, where 2≦n≦x/2, where x is the number of measuring values associated with the respective cylinder in the engine speed vector, to calculate the difference between the two values determined in step b, to generate a signal E representing the differences obtained as function of time, and to estimate the torque generated by the motor as a function T dependent at least on the signal E.
Abstract translation:用于估计具有至少两个气缸的内燃机产生的平均转矩的方法,包括产生发动机转速矢量,其中记录了表示发动机的瞬时发动机转速的几个测量值,以确定相应的第n个最高 和发动机转速矢量的第n个最低值,其中2≦̸ n≦̸ x / 2,其中x是与发动机转速矢量中的相应气缸相关联的测量值的数量,以计算确定的两个值之间的差 在步骤b中,产生表示作为时间函数获得的差的信号E,并且至少根据信号E来估计由电动机产生的扭矩作为函数T。