Abstract:
PROBLEM TO BE SOLVED: To suppress an occurrence of shock during rearward traveling, the occurrence being caused by start of an engine, in a hybrid vehicle.SOLUTION: The hybrid vehicle includes 1: the engine 10; a first MG (motor generator) 20 for starting the engine 10; a second MG 30 coupled to a drive shaft 16; a motive force dividing mechanism 40 which mechanically couples respective three elements of the drive shaft 16 coupled to drive wheels 80, an output shaft of the engine 10 and a rotation shaft of the first MG 20, and is able to make any one of the elements act as a reaction force element thereby transmitting a motive force between other two elements; an ECU 200 for inhibiting start of the engine 10 when predetermined conditions are satisfied. The predetermined conditions include conditions: that a lapsed time from a time point when a shift position is switched to a rearward traveling position is within a predetermined period of time; that a brake device 151 is not operated; and that a magnitude of a rearward traveling torque of the second MG 30 for generating a required drive force in a rearward direction of the hybrid vehicle 1 is smaller than a magnitude of a reaction force torque generated in a direction opposite to that of the rearward traveling torque by using the second MG 30 at the time of starting the engine 10.
Abstract:
PROBLEM TO BE SOLVED: To prevent a driver from feeling discomfort by driving a vehicle as the driver expects when a shift position is in a neutral position while suppressing the vehicle from sliding down in the drive of the vehicle in a slope road.SOLUTION: When a shift lever is operated when and while the vehicle is stopped, when the shift position SP is in forward positions (D, B), braking force holding control is permitted in only an ascending slope in a travelling direction of the vehicle and the braking force holding control is prohibited in other situations, when the shift position SP is in a reverse position (R), the braking force holding control is permitted in only a descending slope in a travelling direction of the vehicle and the braking force holding control is prohibited in other situations, and when the shift position SP in the neutral position (N), the braking force holding control is prohibited from being executed regardless of the slope.
Abstract:
PROBLEM TO BE SOLVED: To boost a voltage according to the running state of a vehicle, in a power supply device which supplies electric power from an electricity storage to an electric motor that drives an electric motor and supplies electric power to the electric motor, by boosting a terminal voltage of the electricity storage.SOLUTION: A threshold value is set up for road surface gradient. Boosting is performed, when the gradient is more than the threshold and suppressed or inhibited, when it is less than the threshold value. Also, a threshold is set up for the temperature of the electric motor. Boosting is performed, when the temperature is the threshold value or higher and suppressed or prohibited when it is less than the threshold value. These thresholds are set up for each of shift positions (normal running D, reverse running R, engine brake running B, and sports running S) and each of running modes (power, economy, release of vehicle attitude control and EV).
Abstract:
PROBLEM TO BE SOLVED: To suppress overdischarge or the like of an electricity accumulating means resulting from a slip by idling of driving wheels. SOLUTION: In a hybrid motor vehicle 20, when vehicle motion integrated control by a brake ECU 95 is canceled, a target slip velocity Vslip* specifying a tolerance of slip velocity Vslip is set (steps S140, S150 or S160), wherein the slip velocity Vslip shows a level of the slip by idling of the driving wheels 39a, 39b corresponding to a motor control mode which is set among a sine wave control mode, an overmodulation control mode, and a square wave control mode. An engine 22 and motors MG1 and MG2 as driving sources involve drive control of the motors MG1 and MG2 under the motor control mode thus set, and the slip velocity Vslip is controlled not to exceed the target slip velocity Vslip* (steps S170 to S270). COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To suppress generation of noise when fastening a driving system caused by reversal of torque by preventing the reversal of the torque outputted to an input shaft of a transmission from an electric motor when an internal combustion engine is in an operation state generating vibration or booming noise. SOLUTION: When target engine speed Ne* and target torque Te* of an engine are present in booming noise area and when temporary torque Tm2tmp is within a prescribed area range including a value 0 by a threshold value Tref, a shift stage of the transmission is upshifted (S210), and torque instructions Tm1*, Tm2* of the motors MG1, MG2 are set such that request torque Td* is outputted to a driving shaft out of the prescribed area range of the temporary torque Tm2tmp though it is present in the booming noise area. Thereby, when the engine is operated in the booming noise area, the generation of the noise due to fastening which may be generated by reversing the torque of the motor MG2 can be suppressed. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To prevent an electrically driven water pump that is locked due to frozen coolant from being incorrectly detected as abnormality.SOLUTION: In the control device of an electric pump discharging a cooling medium, when a temperature of the cooling medium is higher than a threshold value, which is predetermined to be higher than a freezing point, as well as when the electrically driven water pump is locked, the electrically driven water pump is determined to be abnormal. Thereby, assuming that the cooling medium is not frozen, the abnormality that the electrically driven water pump is locked can be detected. Therefore, an electrically driven water pump that is locked due to frozen of the cooling medium can be prevented from being incorrectly determined as abnormality.
Abstract:
PROBLEM TO BE SOLVED: To suppress the temperature rise of a motor generator as a driving source.SOLUTION: A hybrid vehicle is provided with an engine and a motor generator as a driving source. An oil pump that supplies the motor generator with oil is driven by an engine. An ECU for controlling the engine, controls the engine so that the output torque of the engine increases as the temperature of the motor generator becomes higher during driving of the engine.
Abstract:
PROBLEM TO BE SOLVED: To appropriately notify a restricted vehicle state to a user when changing into a limp-home running mode due to occurrence of abnormality in a drive system of a vehicle.SOLUTION: A vehicle 100 can run using power from a power storage device 110, and includes: a display part 191 to visually notify a driver of a state of the vehicle 100; and an ECU 300 to control the display part 191. When the abnormality occurs in the vehicle 100, the ECU 300 switches to a limp-home running mode corresponding to a specified abnormality part, while specifying the abnormality part when the abnormality occurs. The ECU 300 displays on the display part 191, according to the limp-home running mode, the information on the specified abnormality part, and at least one out of pieces of information concerning runnable vehicle speed, outputtable power, and runnable distance.
Abstract:
PROBLEM TO BE SOLVED: To properly control an internal combustion engine for each operation mode in a hybrid vehicle capable of selecting a plurality of operation modes. SOLUTION: In a hybrid vehicle 20, among a value Nrunor and a value Nrlnor for a normal mode, a value Nrupwr and a value Nrlpwr for a power mode, and a value Nrueco and a value Nrleco for an ECO mode, values corresponding to an operation mode selected as an operation mode for execution are set as upper and lower limit rate values Nru and Nrl in order to set a target engine speed Ne* so that the engine speed Ne of an engine 22 can gradually change based on the request torque Tr* (S110 and S130, S150 or S170), and the engine 22 and the motors MG1 and MG2 are controlled so that the engine 22 can rotate at the target engine speed Ne*, and that the torque based on the request torque Tr* can be output to a ring gear shaft 32a (S220 to S270). COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To give priority to the responsiveness of a driving force in a power mode, and to give priority to fuel consumption in an eco-mode. SOLUTION: This power output device is configured to decide a driving mode based on an input mode setting signal MSW (S400 to S410), and to set an intermittent inhibition value which is larger than that in a normal mode when the driving mode is a power mode, and to set an intermittent inhibition value which is smaller than that in a normal mode (S420 to S440) when the driving mode is an eco-mode, and to inhibit the intermittent operation of an engine when the output restriction Wout of a battery is smaller than an intermittent inhibition value, and when the output restriction Wout of a battery is equal to or larger than the intermittent inhibition value, to permit the intermittent operation of an engine for making a vehicle travel. Thus, it is possible to improve the responsiveness of a driving force since the intermittent driving of the engine is inhibited, and the engine is made to frequently operate in the power mode. Also, it is possible to improve fuel consumption since the intermittent operation of the engine is permitted, and the engine is made to frequently stop in the eco-mode. COPYRIGHT: (C)2009,JPO&INPIT