摘要:
A method of controlling coasting operation of a hybrid vehicle during a coasting operation and an apparatus for performing the same are provided. The coasting operation is controlled by calculating a remaining distance from a current location of a vehicle and a location at a target vehicle speed and an approach distance until reaching the target vehicle speed demanded at a current vehicle speed. Additionally, an inertia torque is adjusted to correspond to vehicle variation based on roads, slopes of the roads, and exterior disturbances. Thus, since inertia torque is adjusted during the coasting operation based on the target vehicle speed, unnecessary energy loss is reduced and fuel ratio is enhanced during traveling on roads.
摘要:
A method (600) for exiting a sailing mode of a vehicle (100) is described. The vehicle (100) comprises a clutch unit (103) which is disengaged in order to decouple a driving shaft (102) of the vehicle (100) from a driven shaft (105) of the vehicle (100), when the vehicle (100) is operated in the sailing mode. The method (600) comprises predicting (601) that a trigger for an exit of the sailing mode will occur, and initiating (602) the preparation of the clutch unit (103) for engagement, subject to predicting that a trigger for the exit of the sailing mode will occur. Furthermore, the method (600) comprises detecting (603) a trigger for the exit of the sailing mode, and adapting (604) a shaft speed (230) of the driving shaft (102), subject to detecting a trigger for the exit of the sailing mode. In addition, the method (600) comprises engaging (605) the clutch unit (103), subject to preparing the clutch unit (103) for engagement and subject to adapting the shaft speed (130), in order to exit the sailing mode.
摘要:
A method of controlling motor torque in coasting of a vehicle includes: acquiring information about a speed of an input shaft of a transmission detected by a detector while the vehicle is running, information about an acceleration of the input shaft of the transmission obtained from the speed of the input shaft of the transmission, and information about a state of an engine clutch; determining whether the vehicle is coasting based on the acquired information; calculating a motor torque instruction based on engine friction torque corresponding to the speed of the input shaft of the transmission, a rotary inertia of an engine, and the acceleration of the input shaft of the transmission, when the vehicle is determined to be coasting with the engine clutch disengaged; and controlling torque of a driving motor for driving the vehicle in accordance with the calculated motor torque instruction.
摘要:
A method and a system for choosing a transmission mode in a vehicle over the course of a road section, wherein the vehicle has applied coasting prior to this road section and wherein a highest permitted speed vmax is defined for the road section, below which an actual speed for the vehicle should be kept. A simulation of a future speed profile vsim—Gear for a possible gear position for a gearbox in the vehicle is conducted on the basis of a road slope obtained from map data in combination with vehicle positioning information and wherein the simulation simulates, when the road section lies ahead of the vehicle, an actual speed for the vehicle over the course of the road section. Next, an evaluation is carried out of whether a suspension of the coasting in favor of the possible gear position is recommended, wherein the possible gear position is deemed recommendable if a highest value vsim—Gear—max for the future speed profile exceeds the highest permitted speed vmax. The evaluation is then utilized in the choice of transmission mode.
摘要:
Controls for improved drivability of a vehicle equipped with start/stop logic are disclosed. One exemplary embodiment is a method comprising stopping an internal combustion engine of the vehicle to achieve a target speed profile during slowing of the engine to reduce noise, vibration and harshness, and/or to achieve a target engine stop position. Another embodiment is a method for selecting between a nominal re-start mode and a delayed re-start mode where launching of the vehicle after a stop is delayed relative to the nominal start mode in response to a vehicle input.
摘要:
A running control device is configured to execute an engine coupling running mode performed with an engine and wheels connected by a connecting/disconnecting device, a neutral inertia running mode performed with the engine separated from the wheels by the connecting/disconnecting device while the engine is supplied with fuel and allowed to perform self-sustaining rotation, and a free-run inertia running mode performed with the engine separated from the wheels by the connecting/disconnecting device while fuel supply to the engine is stopped to stop rotation. The neutral inertia running mode is terminated when an operation amount of the accelerator pedal becomes equal to or greater than a predefined first determination value. The free-run inertia running mode is terminated when an operation amount of the accelerator pedal becomes equal to or greater than a predefined second determination value larger than the first determination value.
摘要:
A vehicle engine automatic control device has a brake pedal operation amount detecting unit that detects an amount of brake pedal operation by a driver, a negative pressure-based force multiplying unit that multiplies a force, with which a brake is operated, using an intake negative pressure of an engine, a negative pressure detecting unit that detects a negative pressure of the negative pressure-based force multiplying unit, and a coast stop control unit that stops the engine when the amount of brake pedal operation that is detected is equal to or greater than a first operation amount threshold during coast drive, and re-starts the engine when the negative pressure that is detected falls below a first negative pressure threshold after the engine stops.
摘要:
A velocity profile can be used in conjunction with vehicle operating condition data to determine a gear shift schedule that mitigates the amount of service brake effort required to slow a vehicle by making optimal use of engine speed, friction and engine brakes. The gear shift point drives the engine to a higher operating speed and greater frictional torque, slowing the vehicle, which can then coast to a desired speed. The gear shift point can be timed to minimize fuel consumption during the maneuver. Thus, a vehicle downshift event is created based on the transmission gear recommendation. The benefit is increased freight efficiency in transporting cargo from source to destination by minimizing fuel consumption and maintaining drivability.
摘要:
A hybrid electric vehicle (HEV) comprises an engine (121) and at least one electric machine (123). The vehicle is operable in an electric vehicle (EV) mode in which the electric machine (123) develops torque to drive the vehicle whilst the engine (121) is switched off. According to the invention, the vehicle is operable when in EV mode automatically to cause engine turnover without starting the engine when a prescribed one or more conditions are met. This can be done for diagnosis or to meet braking requirements.
摘要:
A velocity profile can be used in conjunction with vehicle operating condition data to determine a gear shift schedule that mitigates the amount of service brake effort required to slow a vehicle by making optimal use of engine speed, friction and engine brakes. The gear shift point drives the engine to a higher operating speed and greater frictional torque, slowing the vehicle, which can then coast to a desired speed. The gear shift point can be timed to minimize fuel consumption during the maneuver. Thus, a vehicle downshift event is created based on the transmission gear recommendation. The benefit is increased freight efficiency in transporting cargo from source to destination by minimizing fuel consumption and maintaining drivability.