Abstract:
A utility vehicle and a method of operating a utility vehicle having a rear axle driven by a drive engine, a rear axle differential on the rear axle, and a front axle that is configured to be switched on to perform four-wheel drive are provided. The method includes activating a differential lock for locking the rear axle differential on the basis of at least one of a rear axle slippage variable, which characterizes a drive slippage occurring at the rear axle, an engine power of the drive engine, a status of at least one brake device associated with the rear axle, and a status regarding the four-wheel drive.
Abstract:
A system for increasing fuel efficiency of a vehicle includes a power source designed to convert a fuel into power and an input device designed to receive user input corresponding to a request to operate in a constant power mode. The system further includes at least one sensor designed to detect vehicle data corresponding to a current power of the power source and a memory designed to store an upper power threshold and a lower power threshold. The system further includes an electronic control unit (ECU) that is designed to determine the current power of the power source based on the detected vehicle data and to control the power source such that the current power remains between the upper power threshold and the lower power threshold when the user input corresponds to the request to operate in the constant power mode.
Abstract:
A method for determining the mass m of a motor vehicle, in particular a commercial vehicle, is based on the principles of power mechanics. In order to determine the vehicle mass in a simple way as accurately as possible while driving, a speed v of the motor vehicle is determined and a drive power PA of the motor vehicle is determined. The mass m of the motor vehicle can then be determined from the speed v and the drive power PA. A device applies such a method, and a motor vehicle includes such a device.
Abstract:
In a hybrid vehicle including an engine, a motor driven by a battery output, and a continuously variable transmission, when acceleration is requested, an ECU executes feeling-of-acceleration producing control for gradually increasing an engine rotation speed from an initial value NEini lower than an optimum rotation speed. With the battery output, the ECU makes up for a shortfall of engine output caused by the feeling-of-acceleration producing control. When starting the feeling-of-acceleration producing control, the ECU calculates a basic initial value NEini_base lower than the optimum rotation speed, and calculates, based on an atmospheric pressure, a lower limit value NEmin that allows the battery output to be maintained to be equal to or lower than prescribed electric power. The ECU selects a larger one of basic initial value NEini_base and lower limit value NEmin as initial value NEini.
Abstract:
A hybrid vehicle includes an engine (10), a first motor generator (MG1), a second motor generator (MG2), a transmission unit (power transmission unit) (40), a differential unit (50), a clutch (CS) and a mechanical oil pump (501). The hybrid vehicle is able to switch between series-parallel mode in which power of the engine is transmitted via the transmission unit and the differential unit and series mode in which power of the engine is transmitted via the clutch. The differential unit (50) is a planetary gear mechanism including a sun gear (S2) connected to the first motor generator (MG1), a ring gear (R2) connected to the second motor generator (MG2), and a carrier (CA2) connected to a ring gear (R1) that is an output element of the transmission unit (40). The mechanical oil pump (501) is driven by power that is transmitted from the carrier (CA2) of the differential unit.
Abstract:
A control method for a hybrid work machine that includes an internal combustion engine that drives a working unit, and a generator motor connected to the internal combustion engine and transfers and receives electric power to/from a power storage device, the control method includes: determining whether a situation is at a time of an output limitation in which an output of the internal combustion engine is limited; at the time of the output limitation, limiting an assist operation of supplying the electric power stored in the power storage device to the generator motor in a case of increasing an output of the internal combustion engine based on a work request for the working unit at a time of working; and controlling the internal combustion engine and the generator motor in a state in which the assist operation is limited.
Abstract:
A hybrid system includes a transmission control module, a power source, a transmission, and a drive train. The transmission control module partially operates the hybrid system and receives operating information from various components of the system, calculates power losses in the drive train, and calculates the driving torque needed to reach a target power profile determined from a driver's input.
Abstract:
A system and a method that control warm-up of clutch fluid in a hybrid electric vehicle. The hybrid electric vehicle includes a clutch that controls power delivery between an engine and a motor and an oil pump that is operated by the motor and generates hydraulic oil pressure operating the clutch. The method includes determining, by a controller, whether delivery of power from the engine and motor in a transmission is cut and detecting temperature of the fluid using an oil temperature detector. In addition, the motor is maintained by the controller at a predetermined target speed to operate the oil pump connected to the motor when the detected temperature of the fluid is equal to or less than a predetermined temperature, wherein the predetermined target speed is a motor speed at which sufficient pressure for flowing the fluid is generated in the oil pump operating with the motor.
Abstract:
A hybrid vehicle mode-switching control device for a hybrid vehicle controls that an output of an engine and/or motor in response to a mode-switch request. In a case of a difference between an actual transmission gear ratio and a target transmission gear ratio, a deficit with respect to the requested drive power occurs that causes discomfort to the driver. The drive power surplus or deficit caused by the transmission gear ratio deviation can eliminated by correcting of the motor torque and/or the engine torque by a correction amount necessary to eliminate the surplus or deficit of drive power. In this way, the lack of drive power due to the transmission ratio deviation and the driver's sense of discomfort can be eliminated.
Abstract:
A control apparatus of a power transmission system is provided and includes an input shaft through which torque from an engine is input and first and second motor/generators. A planetary gear set is disposed on a line from the input shaft and an output shaft transmits torque from the planetary gear set and the second motor/generator to driving wheels. A battery supplies electricity to the first and second motor/generators and charges electricity generated therefrom. An HEV mode 1 in which an operation of a first brake and a second brake is released or an HEV mode 2 in which an operation of the second brake is operated is converted based on a mechanical maximum efficiency range, a required power of the engine, a speed ratio of a transmission, and an SOC of the battery.