A method of oil pre-conditioning for an electric powertrain for a vehicle configured to provide electric propulsion of the vehicle, said electric powertrain comprising the first electric motor being linked to the first gear module, a secondary shaft being linked to the second gear module, the second electric motor being linked to the third gear module through a motor shaft, the differential being shared by both electric motors,

The electric powertrain is surrounded by an oil. The method includes the steps of selecting an oil pre-conditioning configuration wherein the secondary shaft does not rotate and at least one of the first electric motor or the second electric motor rotates while the other is in driving mode leading to the heating of the oil to reach a threshold temperature and applying the selected oil pre-conditioning configuration.

A working machine includes a prime mover, a traveling device, a traveling motor configured to output power to the traveling device, a speed shifting valve configured to shift an output speed of the traveling motor between a first speed and a second speed faster than the first speed, an actuation valve configured to change a hydraulic pressure applied to the speed shifting valve, a first fluid passage fluidly connected to the speed shifting valve so that hydraulic fluid having the hydraulic pressure to be applied to the speed shifting valve flows through the first fluid passage, a drain fluid passage fluidly connected to the first fluid passage, a brake shiftable between a braking state to brake the traveling motor and a braking releasing state to release the braking, and a controller configured or programmed to control the actuation valve and the brake, and being capable of activate a warm-up mode. The controller, when activating the warm-up mode, is configured or programmed to shift the brake into the braking state, and control the actuation valve so as to make the hydraulic pressure to be applied to the speed shifting valve equal to or greater than a value corresponding to the second speed.

Electric motor including: a rotor whose rotating shaft extends along an axis of extension, a stator disposed around the rotor, a front bearing and a rear bearing configured to be assembled by forming an internal cavity in which the rotor and the stator are housed, the front bearing comprising a cylindrical portion extending along the axis of extension, and a lid having bell shape that completely covers the rear bearing and at least the cylindrical portion of the front bearing, the lid comprising an internal chamber which extends at least partly around the internal cavity, a heat-transfer fluid inlet and a heat-transfer fluid outlet fluidly connected to the internal chamber so as to allow a heat-transfer fluid to circulate in the internal chamber.

A working machine includes a prime mover, a traveling motor a speed shifting valve configured to shift an output speed of the traveling motor between a first speed and a second speed faster than the first speed, an actuation valve to change a hydraulic pressure applied to the speed shifting valve, a brake shiftable between a braking state to brake the traveling motor and a braking releasing state to release the braking, and a controller configured or programmed to control the actuation valve and the brake, and being capable of activate a warm-up mode. The controller, when activating the warm-up mode, shifts the brake into the braking state, and controls the actuation valve so as to make the hydraulic pressure applied to the speed shifting valve equal to or greater than a value corresponding to the second speed.

A vehicle is provided with an engine, a battery, a second motor generator generating a driving force by using electric power of the battery, and an electronic control unit (ECU) controlling the engine and the second motor generator. The ECU is configured to be capable of executing rotation speed increase control for controlling the rotation speed of the engine so that the sound pressure of the engine is increased in response to an increase in the vehicle speed of the vehicle. In a charge depleting (CD) mode in which the state of charge (SOC) of the battery is consumed, the ECU limits the execution of the rotation speed increase control compared to a charge sustaining (CS) mode in which the SOC is maintained in a predetermined range.

A working machine includes a prime mover, a traveling device, a traveling motor, a traveling pump, a circulation fluid passage, a traveling switching valve shiftable between a first state corresponding to a first speed of a hydraulic motor and a second state corresponding to a second speed of the hydraulic motor, a brake, an actuation valve configured to output the hydraulic pressure applied to the traveling pump, and change the hydraulic pressure output therefrom, and a controller configured or programmed to control the traveling switching valve, the brake and the actuation valve, and being capable of activating a first mode. The controller is configured or programmed to, when activating the first mode, shift the brake into a braking state, shift the traveling switching valve into the second state, and control the actuation valve so as to set the hydraulic pressure output from the actuation valve to a predetermined pressure.

A vehicle has a front grille, engine, engine compartment, power storage device, temperature sensor, shutter, heater and controller. The device can be electrically charged from an external power supply. The temperature sensor detects engine coolant temperature. The shutter is disposed in a transfer pathway of air drawn into the engine compartment via the front grille, and is switched between closed and open states. The heater is able to generate heat when receiving the electric power, raising the coolant temperature. The controller starts the engine when the coolant temperature is lower than a startup threshold value, drives the heater when the coolant temperature is lower than a first threshold value equal to or higher than the startup threshold value, until the coolant temperature becomes equal to or higher than the first threshold value, and drives the shutter to place the shutter in the closed state while the heater is driven.

An apparatus and method for controlling cold starting of a mild hybrid vehicle, are disclosed. The method includes: measuring, by a sensor, a cooling water temperature of the vehicle when a request is received to start an engine; operating, by a controller, a starter to drive an engine when the cooling water temperature is less than a preset reference temperature, and stopping the operation of the starter and operating an MHSG to drive the engine when RPM of the engine driven by the starter exceeds a preset reference value. In particular, stepwise starting according to the cold starting of the vehicle is performed. The apparatus and the method are advantageous in that a starter and alternator are simultaneously controlled under a cold starting condition to provide startability and reduce capacity of a starter, reducing manufacturing costs.

An apparatus and method for controlling cold starting of a mild hybrid vehicle, are disclosed. The method includes: measuring, by a sensor, a cooling water temperature of the vehicle when a request is received to start an engine; operating, by a controller, a starter to drive an engine when the cooling water temperature is less than a preset reference temperature, and stopping the operation of the starter and operating an MHSG to drive the engine when RPM of the engine driven by the starter exceeds a preset reference value. In particular, stepwise starting according to the cold starting of the vehicle is performed. The apparatus and the method are advantageous in that a starter and alternator are simultaneously controlled under a cold starting condition to provide startability and reduce capacity of a starter, reducing manufacturing costs.

A vehicle is provided with an engine, a battery, a second motor generator generating a driving force by using electric power of the battery, and an electronic control unit (ECU) controlling the engine and the second motor generator. The ECU is configured to be capable of executing rotation speed increase control for controlling the rotation speed of the engine so that the sound pressure of the engine is increased in response to an increase in the vehicle speed of the vehicle. In a charge depleting (CD) mode in which the state of charge (SOC) of the battery is consumed, the ECU limits the execution of the rotation speed increase control compared to a charge sustaining (CS) mode in which the SOC is maintained in a predetermined range.