Abstract:
PROBLEM TO BE SOLVED: To provide a control device for a hybrid vehicle that prevents change in driving torque and maintains drivability when output torque of an internal combustion engine is increased due to an advance of ignition timing after start of the internal combustion engine in the hybrid vehicle including a differential mechanism and a first rotating machine and a second rotating machine that are connected to the differential mechanism.SOLUTION: Rotational frequency of a first motor generator MG1 is changed to a direction in which an increase in output torque of an engine 12 caused by an advance angle of ignition timing does not affect torque of an intermediate power transmission shaft 16, so as to avoid a situation where the increase in the output torque of the engine 12 is transmitted to the intermediate power transmission shaft 16 and a second motor generator MG2. Thus regardless of the increase in the output torque of the engine 12 caused by the advance angle after start of the engine 12, change in driving torque of a vehicle is suppressed and drivability is maintained.
Abstract:
PROBLEM TO BE SOLVED: To improve the accuracy in correcting the transmission torque of a clutch when the clutch is slipping.SOLUTION: Correction of AT transmission torque Tat deviating from an instruction value by using a difference ΔTat between an estimation value of the AT transmission torque Tat and the instruction value thereof makes it possible to improve accuracy in correcting the AT transmission torque Tat in an inertia phase of speed change transition of a transmission 20. That is, the difference between the instruction value of the AT transmission torque Tat and the estimation value thereof is directly corrected, and therefore it is possible to correct the AT transmission torque Tat as required. Here, using of differences ΔTat at plural temporal points in the inertia phase instead of one point therein enables correction even if there is a variation trend of the difference ΔTat throughout an inertia phase. That is, for magnification of the difference ΔTat, and variations thereof in any temporal point throughout the inertia phase, it is possible to acquire plural times of learning opportunities with only one execution of speed change. This enables improvement in accuracy of a learning value ΔTgk and in converging performance.
Abstract:
PROBLEM TO BE SOLVED: To improve the accuracy in correcting the transmission torque of a clutch when the clutch is slipping.SOLUTION: Correction of AT transmission torque Tat deviating from an instruction value by using a difference ΔTat between an estimation value of the AT transmission torque Tat and the instruction value thereof makes it possible to improve accuracy in correcting the AT transmission torque Tat when a transmission 20 is engaged in changing speeds. That is, the difference between the instruction value of the AT transmission torque Tat and the estimation value thereof is directly corrected, and therefore it is possible to correct the AT transmission torque Tat as required. Here, using of a delay-considered instruction value for the instruction value of the AT transmission torque Tat makes it possible to reduce a temporal error between the instruction value and estimation value at the time of calculating the difference ΔTat, enabling a further accuracy in correcting the AT transmission torque Tat. This enables improvement of a life of components (e.g., a friction member of a clutch C) and suppression of deterioration in drivability.
Abstract:
PROBLEM TO BE SOLVED: To appropriately implement power decrease control irrespective of a difference in a differential state of a differential unit when the power decrease control of an engine is implemented at the time of connecting a disconnection device in a vehicle having the differential unit.SOLUTION: When an MG2 rotating speed ωm that is an input rotating speed of an automatic transmission 20 is raised with engine power Pe in order to perform downshift, power decrease control of an engine 12 is implemented immediately before the M2 rotating speed ωm reaches a synchronous rotating speed ωmdoki attained successively to the downshift. When an engine speed ωe that is a rotating speed of a first rotary element (carrier C) of a differential unit 14 is low, a power decrease volume Pdown is made larger than it is when the engine speed is high. Therefore, the power decrease control is properly implemented irrespective of a difference in the differential state of the differential unit 14, that is, a difference in rotational energy Ediff. Eventually, driveability, fuel economy, exhaust gas, or the like can be upgraded.
Abstract:
PROBLEM TO BE SOLVED: To suppress resonance of a suspended region attributable to torsional vibrations of a drive line occurring at the time of starting an engine during traveling at a high gear ratio, and prevent occurrence of a shock.SOLUTION: When an engine 12 is started, if torsional vibrations in a resonant frequency band of a region suspended by a body mount 34 are decided to have occurred in a drive line, a damping torque Tvib for damping relative vibrations of the suspended region is added to a command torque of a second motor generator MG2. Therefore, the relative vibrations of the suspended region are damped. Accordingly, resonance of the suspended region attributable to the torsional vibrations occurring in the drive line at the time of starting the engine 12 during traveling at, for example, a high gear ratio is suppressed, and a shock derived from the resonance is minimized.
Abstract:
PROBLEM TO BE SOLVED: To realize highly accurate sprung vibration damping control.SOLUTION: A sprung vibration damping control device of a vehicle restrains sprung vibration generated in a vehicle body of the vehicle provided with first and second motor-generators 31 and 32 as a driving source, and comprises sprung vibration damping control amount arithmetic operation means 5 for setting a sprung vibration damping control amount for restraining the sprung vibration and motor-generator control means 6 for executing sprung vibration damping control by controlling a motor-generator control amount of the second motor-generator 32 so as to realize its sprung vibration damping control amount, and limits the sprung vibration damping control by the second motor-generator 32 by prohibiting the sprung vibration damping control or reducing the sprung vibration damping control amount by the second motor-generator 32, when the motor generator control amount is a value in the same as a voltage boosting switching determining threshold value of system voltage of an inverter 42 or near to this.
Abstract:
PROBLEM TO BE SOLVED: To provide a sprung mass damping control system of a vehicle, which suppresses sprung mass vibration with high accuracy. SOLUTION: The sprung mass damping control system of a vehicle, suppresses sprung mass vibration generated in a vehicle body of a vehicle provided with at least a motor-generator (first and second motor-generators 31, 32) as a drive source. The system includes: a sprung mass damping control amount calculating device 5 that sets a sprung mass damping control amount for suppressing the sprung mass vibration, and a drive source control device (a motor-generator control device 6) that executes sprung mass damping control by controlling a motor-generator control amount of the motor-generator to achieve the sprung mass damping control amount. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an electric vehicle in which a motor is controlled in a more appropriate range, and to provide its control method. SOLUTION: In an automobile comprises a motor outputting a traveling power, and a battery for exchanging power with the motor, a control r. p. m. Nm2* is set using a hysteresis value his having a trend of decreasing as the r. p. m. Nm2 of the motor increases (S140, S150), and a torque command Tm2* of the motor is set by limiting a temporary motor torque Tm2tmp to be output from the motor by torque limits Tmax and Tmin set by using the control r. p. m. Nm2* (S160-S180). Consequently, oscillation in torque being output from the motor can be suppressed more when the r. p. m. Nm2 of the motor is relatively low, and performance of the battery can be exhibited more by decreasing the hysteresis of power being output from the motor when the r. p. m. Nm2 of the motor is relatively high. Consequently, the motor can be controlled in a more appropriate range. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To suppress speed change shocks when changing the speed of a transmission during the coast down, and to suppress overdischarge of a power storage device such as a battery. SOLUTION: In the coast down state, when the vehicle speed V to change the state from the output of the decelerated torque to the output of the creep torque is at the timing of the threshold V2 (S200), the requested charging power Pb* is set so that a battery 50 is not charged (S140, S150), and the gear condition of a transmission 60 is changed (S230). When the auxiliary machine power Pacc exceeds the output limit Wout of the battery, the auxiliary machine is drive-limited (S180). As a result, speed change shocks, rattling noise of gears, or the like occurring when the gear state of the transmission is changed during the coast down, and overdischarge of the battery can be suppressed. COPYRIGHT: (C)2005,JPO&NCIPI