Abstract:
PROBLEM TO BE SOLVED: To provide a warmup control device for a hybrid vehicle capable of improving warmup ability during engine cold time and suppressing deterioration in fuel efficiency. SOLUTION: The warmup control device for a hybrid vehicle is equipped with a diesel engine 11, an MMT 12, a motor generator 17 for assisting power generation by engine output or engine output by electric power of a battery 20. The warmup control device is equipped with a warmup determination means for determining the warmup state of the engine 11, and an allocation ratio control means for controlling the allocation ratio of the output of the motor generator 17 and the output of the engine 11 according to a battery charge amount SOC and a driver demand output. The allocation ratio control means is structured to control the allocation ratio so that the output of the motor generator 17 is large and the output of the engine 11 is small until completion of warmup is determined by the engine warmup means. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a regeneration control method for an emission control device in a diesel hybrid vehicle capable of promoting the regeneration of PM of the emission control device by increasing the chance of the regeneration of PM of the emission control device also when an EV is running except when an engine is running. SOLUTION: When the engine is running and EV running conditions are established, low temperature combustion control as the temperature raising control of a PM collecting device is performed (steps S10 affirmation, step S20), and then the engine is stopped and PM is regenerated during the running of an EV (step S30, step S50, step S90). When the overheating of a catalyst must be avoided (step S40 affirmation) or air must be supplied to the catalyst (step S60 affirmation) during the running of the EV, a clutch is engaged to supply air to the PM collecting device to cool the catalyst so as to avoid overheating (step S100), and also oxygen is supplied to the catalyst in the shortage state of oxygen to promote oxidation reaction so as to promote the regeneration of PM (step S70). COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a technology for preventing creep torque from being set low by the stop of an engine in a stop and start control system of an internal combustion engine. SOLUTION: This stop and start control system of the internal combustion engine comprises a transmission allowing automatic clutch operation in gear shifting and an automatic stop/start means automatically stopping and starting the internal combustion engine. The control system also comprises a transmission control means for changing the creep torque while performing the clutch operation of the transmission. The transmission control means lowers the creep torque when an engine rotational speed is lowered to a specified rotational speed or lower, and based on the lowered amount of the creep torque, changes the set conditions for the creep torque and does not changes the set conditions when the engine is stopped and started by the automatic stop/start means. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a controller for a power source for a hybrid vehicle which can bring actual torque close to the feeling of torque production that the driver originally requests. SOLUTION: The assisting torque of a motor which is generated according to the difference between the torque requested by the driver and the real torque of an internal combustion engine decreases because the limitation processing is performed at decision of the driver-requested torque itself, when the torque transmitted to the axle changes suddenly at the speed change of the internal combustion engine or at the start of the vehicle or the like. Here, the motor-assisting torque is increased by relaxing the above limitation, whereby this controller can bring the actual torque close to the torque generation feeling that the driver originally requests. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To transmit torque of a rotary device to wheels and control reduction of a speed change response property when performing speed change. SOLUTION: A controller for a power train for vehicles is provided with a power transmitting member, speed change gears mounted on the power transmitting member and capable of relatively rotating together with the power transmitting member, a synchronizing mechanism synchronizing the rotation speed between the speed change gears and the power transmitting member and performing speed change so that the power transmitting member and the speed change gears are connected with each other to rotate together, and a rotation device connected with the speed change gears in a power-transmittable state. In the controller, a synchronization control means (step S1 or step S3) controlling increase of time necessary for synchronization between the speed change gears and a power transmitting shaft during the speed change is arranged by differentiating first output control of the rotation device when performing the speed change and second output control of the rotation device when not performing the speed change. COPYRIGHT: (C)2004,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide a power transmission of a vehicle capable of suppressing a power supply that supplies electricity to a motor from growing in capacity and in size. SOLUTION: The power of a drive source is transmitted to a wheel through a clutch and a transmission. The torque capacity of the clutch is reduced and the transmission changes speed while the power of a motor is transmitted to the wheel. Here, a power generating means generates electricity with the power of the drive source, and the generated electricity is supplied to an electric circuit connected to the motor. COPYRIGHT: (C)2004,JPO
Abstract:
PROBLEM TO BE SOLVED: To make a rotation rate of a rotary electric machine not to become excessively large during sudden deceleration of a vehicle. SOLUTION: An ECU executes a program which includes; a step for detecting an accelerator opening (S100); a step for detecting a stroke amount of a brake pedal (S110); a step for detecting a rotation rate NR of a sun gear to which a first MG is connected, and a ring gear of a power dividing mechanism having a carrier to which an engine is connected (S120); and a step to execute processing to restrict a load factor of an engine to an upper value KLH or below, when both accelerator operation and brake operation are performed and vehicle speed decreases rapidly (YES at S130), or in other words when the rotation rate of the ring gear decreases rapidly without falling of the rotation rate NE of the engine (S140). COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a vacuum pump control method and mounting structure for a diesel hybrid vehicle, capable of appropriately maintaining negative pressure inside a negative pressure tank during EV traveling. SOLUTION: Negative pressure inside the negative pressure tank is detected during EV traveling (Yes in Step S10, Step S11), and when negative pressure runs short, an engine is started and a vacuum pump is driven by idle driving (Yes in Step S12, Step S13). After start of the engine, charge amount of a battery is detected (Step S14), and when the charge amount is below a predetermined value, a clutch is engaged and power generation control is performed by engine traveling (No in Step S15, Steps S19 to S21). When the charge amount of the battery exceeds the predetermined value and a negative pressure value detected again is recovered to a predetermined value, the engine is stopped (Yes in Step S15, Step S16, Yes in Step S17, Step S18). COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To restore negative pressure for braking operation without restarting an internal combustion engine when the negative pressure for the brake operation is insufficient during electric driving to stop the internal combustion engine in a hybrid vehicle constituted so that the drive control device has the internal combustion engine and the electric motor as a driving source, and a vacuum pump generating the negative pressure for the brake operation is driven by accompanying with the rotation of the internal combustion engine. SOLUTION: When the negative pressure for the brake operation is insufficient during electric driving, the drive control device cranks the internal combustion engine by connecting to a wheel driving system, controls the output of the electric motor so as to compensate cranking friction torque of the internal combustion engine by the electric motor or cranks the internal combustion engine with a starter. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a technology for stabilizing engine speed by maintaining the engine speed during the shift at an idling speed or over in a hybrid vehicle. SOLUTION: A hybrid vehicle having an engine and an electric motor comprises a transmission for automatically operating a clutch during the shift, an engine control device to control the operation of the engine, and a transmission control device for controlling the clutch operation of the transmission and the engine for controlling the engine during the clutch operation. When the vehicle is decelerated, and the clutch is uncoupled by the transmission, the engine is controlled not by the transmission control device but by the engine control device. COPYRIGHT: (C)2004,JPO