Abstract:
PROBLEM TO BE SOLVED: To control an engine operation characteristic changing means in a stand-by state for locking engagement so that the engagement of a lock means can be rapidly and surely performed when the lock means must be operated in the engine operation characteristic changing means capable of variably controlling intake compression ratio and being locked in a controlled one operating state by a hydraulic-operated locking means. SOLUTION: When an internal combustion engine is stopped, the engine operation characteristic changing means is set to an attitude so that hydraulic oil is easily discharged by gravity from the locking means.
Abstract:
PROBLEM TO BE SOLVED: To control an engine operation characteristic changing means to facilitate the matching operation of the engine operation characteristic changing means for operating a lock means and assure the engagement of the lock means in the engine operation characteristic changing means capable of variably controlling an intake compression ratio and locking the compression ratio in one controlled operation state by the lock means. SOLUTION: When the engine operation characteristic changing means is locked into one operating state by the engagement of the lock means, a swing to accelerate an engagement is applied to the lock means added for the matching of the engine operation characteristic changing means for locking.
Abstract:
PROBLEM TO BE SOLVED: To control an engine operation characteristic changing means to cope with generation of unwelcome intake compression ratio increased lock, in the engine operation characteristic changing means capable of variably controlling an intake compression ratio and being locked to an operation state for enhancing the intake compression ratio by a lock means. SOLUTION: When the engine operation characteristic changing means should not be in the operation state for enhancing the intake compression ratio, whether or not there is a possibility of the locking means locking the changing means to the operation state is determined. When the possibility of the locking is predicted, countermeasures for preventing the locking operation are taken.
Abstract:
PROBLEM TO BE SOLVED: To improve comfortableness in a hybrid vehicle. SOLUTION: In this hybrid vehicle 10, an ECU 100 can operate an engine 200 at its lean limit or combustion limit by performing MG1 feedback control. On the other hand, when a shift position of a shift lever is in an N-range and the MG1 feedback control is performed, the ECU 100 makes MG2 to output motor torque Tm corresponding to generator torque Tg outputted for suppressing a torque reaction of the engine 200. Thereby, torque Tep in an opposing direction to that of the generator torque Tg applied to a ring gear shaft 302 and motor torque Tm are offset, and such a problem that power is transmitted to an axle 11 connected to the ring gear shaft 302 in spite of the N-range can be solved. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a technology capable of preventing hybrid system destruction caused by performing rich spike control. SOLUTION: An internal combustion engine control device is provided for a hybrid vehicle having an internal combustion engine capable of lean combustion and comprising an NOx storage reduction catalyst which holds NOx in exhaust gas and reduces held NOx according to an exhaust air-fuel ratio, and a generator which converts a part of energy generated by the internal combustion engine into electric energy. In idling operation of the internal combustion engine where the rotating speed of the internal combustion engine is not controlled by the generator, the execution of rich spike control of temporarily enriching the exhaust air-fuel ratio to reduce NOx held to the NOx storage reduction catalyst is forbidden. Alternatively, in the case of performing rich spike control in the idling operation of the internal combustion engine, throttle opening is reduced before performing rich spike control. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To efficiently operate an internal combustion engine in a hybrid vehicle. SOLUTION: In a hybrid system 10 a torque calculating part 100b calculates torque of an engine 200 from torque reaction of a motor generator MG1. A fuel consumption rate calculating part 100c calculates an instantaneous fuel consumption rate in the engine 200 on the basis of such the calculated engine torque, a fuel injection quantity and an engine speed. An operation line updating part 100d updates an operation line by performing operation line updating processing, and in this case, updates an operation point on the operation line to a fuel consumption rate minimum operation point fixed on an equal output line by performing first operation point learning processing when the temperature of a battery 500 is a predetermined value or more. While, when the temperature of the battery 500 is less than the predetermined value, second operation point learning processing is performed, and the fuel consumption rate is learnt on an equal rotational line. The temperature of the battery 500 is quickly recovered to the predetermined value or more in this process. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To efficiently operate an internal combustion engine control device for a hybrid vehicle. SOLUTION: In a hybrid system 10, a torque calculating part 100b calculates a torque of an engine 200 from a torque reaction of a motor generator MG1. A fuel consumption rate calculating part 100c calculates a momentary fuel consumption rate of the engine 200 based on the calculated engine torque, the fuel injection amount, and the engine speed. An operating line updating part 100d updates the operating line by performing an operating line updating process based on the calculated fuel consumption rate. At this time, a learning range setting part 100f changes the learning range of the fuel consumption rate set in the operating line updating process according to the vehicle speed, noise, or vibration of a hybrid vehicle 20. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To effectively operate an internal combustion engine in a hybrid vehicle even in a range where the efficiency in a hybrid vehicle is locally low. SOLUTION: In a hybrid system 10, a torque calculation part 100b calculates torque of an engine 200 from torque reaction force of a motor generator MG1. A fuel consumption rate calculation part 100c calculates an instantaneous fuel consumption rate in the engine 200 on the basis of a fuel injection amount and engine rotational speed. A working line updating part 100d updates a working line by executing a working point learning process on the basis of the calculated fuel consumption rate. When the engine 200 has the locally low efficiency range on the working line, a working point setting part 100f sets therein as a working point either having higher efficiency of a working point corresponding to required output or two working points switched and controlled to maintain the required output. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To reduce an amount of NOx exhausted outside a vehicle. SOLUTION: A power control method for a vehicle in which power of at least a prime mover 1 generates a driving force of a drive shaft 61, comprises: a step complying with a request for switching between air-fuel ratios in the prime mover 1; a step for controlling the switching between the air-fuel ratios so as to shorten a combustion time at the air-fuel ratio of large NOx emissions responding to the request for switching the air-fuel ratios; and a step for switching between operational modes controlling the power output from the prime mover 1 in a state of maintaining a constant air-fuel ratio, when a power control pattern of the prime mover 1 is switched to the operational mode meeting the request for switching between the air-fuel ratios. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a control device for a variable valve mechanism capable of performing control to maintain a stable combustion state even in cold condition. SOLUTION: The number of valve stop cranking times i and the number of cycle times j are set based on engine water temperature, intake air temperature, actual compression ratio, and cranking rotating speed (step 101). When it is determined that the number of the cycle times j is larger than 0, a valve stop cranking cycle is started (step 103). Concretely, i valve stop crankings are started in a state of closing intake and exhaust valves and inhibiting ignition by an ignition plug. When the step 103 ends, processing returns to the step 101. COPYRIGHT: (C)2006,JPO&NCIPI