Abstract:
PROBLEM TO BE SOLVED: To efficiently operate an internal combustion engine, even when a knock occurs, in a hybrid vehicle. SOLUTION: A hybrid system 10 is constituted so that a torque calculating part 100b of a control device 100 can calculate torque of an engine 200 from torque reaction of a motor generator MG1. A fuel consumption rate calculating part 100c is constituted so that an instantaneous fuel consumption rate in the engine 200 can be calculated on the basis of such the calculated engine torque, a fuel injection quantity and an engine speed. An operation line updating part 100d sets an operation point of the engine 200 to a fuel consumption rate minimum operation point by performing operation point learning processing on the basis of this calculated fuel consumption rate. When the knock occurs, control being smaller in the fuel consumption rate on the fuel consumption rate minimum operation point, is selected and used by ignition timing delay control and closing timing delay control of an intake valve. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To restrain vibration due to torque fluctuation in changing the number of ignition plugs used for ignition of fuel-air mixture. SOLUTION: This hybrid driving device 100 includes; an internal combustion engine 10 having a plurality of ignition plugs in the same combustion chamber and using some of the ignition plugs at the beginning of starting; and an MG1 connected to the internal combustion engine 10 to be mainly used for power generation and starting of the internal combustion engine and having a function of keeping the engine rotating speed of the internal combustion engine constant. After the MG1 is started for starting the internal combustion 10, the number of ignition plugs used for starting the internal combustion engine 10 is not increased before the torque of the MG1 starts to decrease. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a technique for optimizing a supply flow rate of heated cooling water to an internal combustion engine at the time of preheating. SOLUTION: A thermal storage system supplies cooling water stored in a heat retention manner in a thermal storage tank to a cooling water passage of the internal combustion engine by an electric water pump. This is characterized by an engine wall surface temperature estimation means for estimating temperature at a wall surface of the internal combustion engine, a tank water temperature estimation means for estimating temperature of the cooling water stored in the thermal storage tank and a flow rate control means for controlling the flow rate of the cooling water to be supplied by the electric water pump according to a temperature difference between the estimated wall surface temperature and the temperature of the cooling water stored in the thermal storage tank. Control is made so that for instance the more the temperature difference is, the more the supply flow rate of the cooling water to the cooling water passage increases. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a drive controller for hybrid vehicles which transmits to wheels energy generated when reaction force torque is generated with a reaction force torque generator that is responsible for the reaction force torque of a first driving force source and is separated from a first motor/generator. SOLUTION: A hybrid vehicle comprises: a transfer 6 that transmits power from the first driving force source 1 to the wheels 24; the first motor/generator 11 and the reaction force generator 13 that are coupled to the transfer 6 and generate reaction force torque when power from the first driving force source 1 is transmitted to the wheels 24 through the transfer 6; and a second driving force source 12 that transmits power to the wheels 24. The drive controller for this hybrid vehicle is provided with energy conversion devices 20, 12, 21, 22 that transmit to the wheels 24 energy generated when reaction force torque is generated with the reaction force torque generator 13. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To enable both improvement of energy recovery efficiency and reduction of emission. SOLUTION: An air-fuel ratio of a primary engine 1 is controlled to become lean. The efficiency is therefore improved, though NOx is contained in exhaust gas. On the other hand, in a secondary engine 2, combustion therein is controlled so that an air-fuel ratio of an entire engine system agrees to a theoretical air-fuel ratio. Exhaust gas of the secondary engine thus has the theoretical air-fuel ratio. Since a three-way catalyst 7 purifies NOx, HC and CO, etc. in the vicinity of the theoretical air-fuel ratio, according to this engine system, both the improvement of energy recovery efficiency and the reduction of emission can be realized at the same time. COPYRIGHT: (C)2004,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To allow a starting characteristic changing means of an internal combustion engine for a vehicle having a piston working chamber for working a piston so as to reduce the intake compression ratio when a working fluid is introduced, and requiring the working fluid to be discharged from the piston working chamber when the intake compression ratio is increased to rapidly cope with the operation of increasing the intake compression ratio as required when starting the engine. SOLUTION: The working fluid in the piston working chamber is controlled to be discharged as the internal combustion engine is stopped. The working fluid may be discharged when or after the internal combustion engine is stopped.
Abstract:
PROBLEM TO BE SOLVED: To rapidly change sure engine operational characteristics and save the power consumption for the operation required for the change by reasonably changing the characteristics by an engine operational characteristic changing means, in changing the characteristics at non-operation of an engine in such a way that the intake compression ratio is increased before the cranking when the engine is in a cold state. SOLUTION: Displacement of the means to a predetermined position is carried out by the control of drive force (the strength of the driving force and its operational time) and next control is corrected based on the result of control.
Abstract:
PROBLEM TO BE SOLVED: To prevent a second motor generator MG2 from being large and to obtain required axle torque characteristics against speed while properly maintaining the fuel consumption of an internal combustion engine, in hybrid vehicle drive structure in which an output shaft of the internal combustion engine is connected to a first motor generator and a wheel drive shaft through a power distribution mechanism, and a second motor generator is connected to the wheel drive shaft. SOLUTION: Transmissions (100, 101, 102) are provided at least either at the middle of a wheel drive shaft or at the middle of the connection of the second motor generator to the wheel drive shaft.
Abstract:
PROBLEM TO BE SOLVED: To provide a control device of a hybrid vehicle, which enables charging to be conducted by operating an engine in a fuel-efficient operating range, when charging is required during traveling in torque amplifying mode. SOLUTION: When it is decided during the traveling of the vehicle that charging is required in the torque amplifying mode, an engine control means 108 makes the output torque of the engine 14 increased up to a value TEC during a request for the charging, and a part of the output torque of the engine 14 makes a starter motor generator(SMG) 70 generate electricity. Accordingly, since the output torque of the engine 14 is partially consumed by making the SMG 70 generate the electricity, without increasing speed NE of revolution of the engine 14, the charging can be performed, without making the speed NE increase so much; and the charging can be performed by operating the engine 14 in the fuel-efficient low-engine-speed high-torque operating range, when the charging is required during the traveling in the torque amplifying mode.
Abstract:
PROBLEM TO BE SOLVED: To provide a new judgement standard for judging a condition of a driving force source. SOLUTION: A condition judging device for the driving force source for a vehicle provided with an engine transmitting power to wheels and a motor generator generating power by power of the engine to judge a failure of the engine is provided with a condition judging means of judging the failure of the engine based on a power generation condition of the motor generator (step S11 or S15).