Abstract:
PROBLEM TO BE SOLVED: To provide an internal combustion engine starting control device capable of suppressing torque pulsation of a crankshaft at an engine start.SOLUTION: In a starting control device applied to an internal combustion engine 11 having a variable inertia flywheel 20 provided on a crankshaft 11a and including three cylinders, for starting the internal combustion engine 11 by driving the crankshaft 11a by a first MG 12, a target value is set for a moment of inertia of the variable inertia flywheel 20 at a time of starting the internal combustion engine 11, and a coil 24 of the variable inertia flywheel 20 is controlled so that the moment of inertia of the variable inertia flywheel 20 is equal to the set target value at the time of starting the internal combustion engine 11. As the target value, a value obtained by adding a predetermined increased correction value to a basic target value is set in a period in which any of the cylinders of the internal combustion engine 11 is in an expansion stroke, and the basic target value is set in the other periods.
Abstract:
PROBLEM TO BE SOLVED: To control a fly wheel corresponding to an operating state of an internal combustion engine to reduce vibration and noise, with respect to the control of the fly wheel capable of changing vibrational characteristic of an output shaft of the internal combustion engine.SOLUTION: A fly wheel includes: a first wheel rotated integrally with an output shaft of an internal combustion engine; a second wheel rotatable relatively to the first wheel; a magnetic viscous fluid disposed between the first wheel and the second wheel; and an electromagnet forming magnetic field acting on the magnetic viscous fluid. Electric current I5 is supplied to the electromagnet when an operating state of the internal combustion engine is within a range where a rotating speed is low and output torque is large, and electric current is not supplied (electric current I1) to the electromagnet within a range where the rotating speed is high and the output torque is small. Further a transition range is provided between the two ranges so that electric current can be changed in stages (I2, I3, I4). Thus rotational fluctuation causing vibration and noise can be suppressed.
Abstract:
PROBLEM TO BE SOLVED: To achieve regenerative braking without deteriorating NV.SOLUTION: A device that controls a hybrid vehicle that includes an internal combustion engine and flywheel with a changeable inertial mass includes: a required drive force calculation means that calculates the required drive power of a drive shaft; a regenerative control means that controls a second rotating electric machine so that the regenerative braking by the regenerative torque is performed when the calculated required drive power is negative; a target value calculation means that calculates a target value of an engine speed based on the regenerative electric power relating to regenerative braking and a charge limiting electric power of the electricity accumulation means when the regenerative braking is performed; and an inertia control means that changes the inertia mass of the flywheel to the high inertial side, when the calculated target value is higher than the current value.
Abstract:
PROBLEM TO BE SOLVED: To control physical vibration at cranking, while preventing occurrence of overcurrent in a rotating electric machine.SOLUTION: A control device (100) of a hybrid vehicle includes: a crank angle estimating means to estimate a crank angle; a damping torque calculation means to calculate damping torque based on the estimated crank angle; an adjustment means to adjust the damping torque by multiplication by a prescribed adjustment factor α; a rate limit processing means to execute a rate limit processing to a command torque of a rotating electric machine that is a total of the adjusted damping torque and the cranking torque; and a start control means to control the rotating electric machine according to the command torque which is executed by the rate limit processing. The adjustment factor α is set so that the time to reach a reference torque to be reached at the time when the command torque to which the rate limit processing is executed corresponds to compression TDC of an internal combustion engine becomes earlier compared with the case when the adjustment of the damping torque has not been made.
Abstract:
PROBLEM TO BE SOLVED: To appropriately start an engine, while suppressing power consumption when starting the engine in a hybrid vehicle.SOLUTION: A start control device (100) includes: an engine (11); a torque command value determiner (21) which is carried in the hybrid vehicle (1) equipped with a motor (MG1) connected with this engine, determines, when starting the engine, the torque command value for carrying out cranking of the engine by motor; a torque real value calculator (22) to calculate based on determined torque command value, the torque real value for controlling the motor; and a prediction engine speed calculator (21) to calculate the prediction engine speed according to the determined torque command value and the time difference after the torque command value is determined until the torque real value is calculated.
Abstract:
PROBLEM TO BE SOLVED: To quickly and surely effect synchronization control in a hybrid drive apparatus having a meshing engagement mechanism configured to be rotated together with an internal combustion engine by an electric motor. SOLUTION: This controller is for a hybrid drive apparatus for a vehicle, the hybrid drive having an engagement mechanism where meshing teeth have their relative phases synchronized as they are rotated by the electric motor, with the internal communication engine being rotated by the electric motor when the engagement mechanism is rotated by the electric motor in such a way that the meshing teeth, which are not engaged while the internal combustion engine is not driven, have their relative phases synchronized. The controller has a rotation angle detection means (step S1) for detecting the rotation angle of the internal combustion engine when the engagement mechanism is rotated by the electric motor in such a way that the meshing teeth have their relative phases synchronized, and a torque calculation means (step S2) for calculating, based on the calculated rotation angle of the internal combustion engine, the torque that the electric motor should output when the engagement mechanism is rotated in such a way that the meshing teeth have their relative phases synchronized. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To perform high quality retreat travel in the event of a failure of a motor generator for inputting/outputting power with a drive shaft. SOLUTION: A hybrid vehicle 10 includes a dog clutch 360 on an output shaft 320 of a power dividing mechanism 300, and is composed such that either a motor generator MG2 or a motor generator MG3 is selectively connected to the output shaft 320. The power dividing mechanism 300 includes a variable transmission mode and a fixed transmission mode as a transmission mode. The MG3 is connected to the output shaft 320 in the fixed transmission mode, and the MG2 is connected to the output shaft 320 in the variable transmission mode. Therefore, the MG3 is composed such that its generation efficiency is higher than that of the MG2 in the operation condition of the output shaft 320 corresponding to the fixed transmission mode. In the retreat travel control when the MG2 is in a failed state, an ECU 100 controls the dog clutch 360 such that the MG3 is connected to the output shaft 320 even in the variable transmission mode. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To rapidly establish rotational phase synchronization in changing over a shift mode, in a transmission having a continuously-variable shift mode and a fixed stage mode, and carrying out rotational phase synchronization shift control using an electromagnetic clutch having a dog tooth. SOLUTION: This control device of a transmission has a clutch making a first element rotatably controlled by a motor generator engaged with a second element. The clutch can includes dog teeth engaged with each other as, for instance, the first and second elements. The drive control of the motor generator is executed by first and second drive control parts. When rotational phases of the first element and the second element are synchronized with each other in engaging the clutch, the first drive control part supplies, to the second drive control part, an instruction and a control command value synchronizing the rotational phases of the first element and the second element with each other. The second drive control part controls the motor generator by executing compensation by its own control based on the control command value provided from the first drive control part, and synchronizes the rotational phases of the first element and the second element with each other. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To efficiently and effectively reduce the power transmission loss of a hybrid vehicle. SOLUTION: A hybrid drive mechanism 10A has a first transmission 400 between an output rotating shaft 380 of a motor generator MG1 and a counter shaft 700 and a second transmission 500 between an input shaft 370 connected to an output rotating shaft of a motor generator MG2 and the counter shaft 700. The transmissions each have a plurality of gears, and transmission gear ratio, i.e., the rotational speed ratio of an engine 200 to the counter shaft 700, is selectable over a wide range through the action of a first clutch mechanism 430 and a second clutch mechanism 530 to connect each gear with the counter shaft 700. During a shift by which a gear specified by the conditions of the transmissions is changed to a desired gear, of two kinds of transmission routes defined by the machinery of the hybrid drive mechanism 10A, the transmission route with the smaller number of gears that the route passes through is selected. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a hybrid drive capable of suitably making a hybrid vehicle perform retreat traveling. SOLUTION: A hybrid drive mechanism 10A has a first transmission 400 with a plurality of gears between an output rotating shaft 380 of a motor generator MG1 and a counter shaft 700, and a second transmission 500 with a plurality of gears between an input shaft 370 connected to an output rotating shaft of a motor generator MG2 and the counter shaft 700; the transmissions can each be connected at one of the gears with the counter shaft 700 respectively by a first clutch mechanism 430 and a second clutch mechanism 530. In HV-mode drive control, for example, an ECU 100 discriminates whether or not each motor generator is in an abnormal condition; if at least one of the motor generators is in an abnormal condition, the ECU reselects a drive mode from selectable drive modes that are achieved by combinations of the plurality of gears, to make the hybrid vehicle 10 perform retreat traveling. COPYRIGHT: (C)2009,JPO&INPIT