Abstract:
PROBLEM TO BE SOLVED: To suppress the deterioration of the NOx purifying performance of a catalyst for emission gas purification, and to improve emission when the arbitrary selection of driving conditions to specify the settable range of a request driving force requested for traveling is permitted. SOLUTION: In a hybrid car 20, when a shift position SP is set at an S position, and the arbitrary selection of shift positions SP1 to SP6 is permitted, and it is decided that the warming-up of a purifying device 134 has not been completed, a target air fuel ratio AF* is set according to a map for setting an S position/low water temperature target air fuel ratio having such a tendency that a target air fuel ratio AF* is set at a rich side in comparison with a map for setting a normal target air fuel ratio or a map for setting a D position/low water temperature target air fuel ratio to be used when a D position is selected. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To cope with power required for an internal combustion engine even when increasing moderately after an engine speed of the internal combustion engine reaches an upper limit engine speed. SOLUTION: A target engine speed Ne* and a target torque Te* of the engine are set (S125) using a reference operation line obtained when controlling an air-fuel ratio at a theoretical air fuel ratio, in the case where the engine requiring power Pe* is upper limit power Pemax or less. The target engine speed Ne* is set to an upper engine speed Nemax (S140) when a prescribed fuel amount increase prohibiting condition is not satisfied, in the case where the engine requiring power Pe* exceeds the upper limit power Pemax, and a target air fuel ratio used for the air-fuel ratio control of the engine 22 is set at a rich air-fuel ratio, based on the engine requiring power Pe* (S150). COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To inhibit defect caused by the condition of a catalyst during motoring primarily aiming at reducing shock in starting of an internal combustion engine. SOLUTION: In this hybrid automobile, when the exhaust gas purifying catalyst is judged to be in a proper state at step S112, the motoring is continued to reduce an intake air volume into cylinders until intake pipe pressure P reaches a predetermined negative pressure Pref and then combustion control is started. On the other hand, when the exhaust gas purifying catalyst is judged not to be in the proper state at step S112, the combustion control is started even if the intake pipe pressure P is not smaller than Pref. Namely, the combustion control is early performed when catalyst temperature is in a low temperature condition wherein exhaust emission control capacity is lowered or when the catalyst temperature is in a high temperature condition wherein deterioration is accelerated through exposure to air, and therefore the defect caused due to the condition of the catalyst during the motoring such as the degradation of emission and the acceleration of deterioration of the exhaust gas purifying catalyst can be inhibited while primarily aiming at reducing shock in starting of the engine. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To properly estimate the temperature of an internal combustion engine and a member related to the internal combustion engine regardless of the automatic stopping and automatic starting of the internal combustion engine. SOLUTION: After lapse of a predetermined time from the initial starting of an engine 22 after the starting of the system of a hybrid automobile 20 (S100), the estimated temperatures Test 1-Test 4 of a catalyst, the tip end of a fuel injection valve, the surface of a combustion chamber, and the top surface of a piston are calculated (S120-S140) based on an air filling rate kl, an engine speed Ne, cooling water temperature Tw, and an air flow rate Ga without resetting to an initial value even when the engine 22 is automatically stopped. By using these estimated temperatures, the engine can be properly operated. As a result, emission is improved, fuel economy is improved, and durability of the engine and an exhaust emission control device can be improved. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To prevent a vehicle from traveling regardless of owner's intention. SOLUTION: An owner of the vehicle or a vehicle use-right holder authorized by the owner on the use of the vehicle has a travel un-authorizing signal receiving means for receiving the un-authorization of the travel of the vehicle and a driving control state changing means for changing the driving condition of the vehicle based on it. By performing driving force restriction and shift restriction of the vehicle, for example, the travel of the vehicle against the owner's intention is restricted, and the vehicle is prevented from being stolen. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To cool an electricity-accumulating mechanism mounted on a vehicle without causing a time lag with temperature rise. SOLUTION: A battery ECU executes a program that includes a step (S100) in which the battery temperature TB is detected; a step (S400) in which, if the battery temperature TB becomes higher than a threshold value TH(Lo) of a battery cooling fan actuation starting temperature (YES at S300) when a sports mode is selected (YES at S200), a battery cooling fan is actuated; and a step (S400) in which, if the battery temperature TB becomes higher than a threshold value TH(Hi) of the battery cooling fan actuation starting temperature (YES at S500) when a sports mode is selected (NO at S200), the battery cooling fan is actuated. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To prevent exhaustion of gases which exceeds the cleaning capacity of a catalyst during warming up of vehicle. SOLUTION: The control method for a vehicle includes a step (S106) where a vehicle is run in an EV travel mode in accordance with operation of a driver, a step (S115) for executing warming up of the vehicle travel, if warming up is determined as being required, and a step (S118) which prohibits EV traveling mode so as to allow the warming up travel of the vehicle. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a start controller for an internal combustion engine capable of efficiently reducing rotary reaction force of an engine output shaft at the start of the engine. SOLUTION: An electronic control unit 20 retards the closing timing of an inlet valve through a variable valve timing mechanism 11 at restarting and reduces an actual compression ratio to reduce a load on a generator motor 17 unavoidable for rotating a crankshaft 12 at restarting. At the same time the electronic control unit 20 estimates the rotary reaction force during restarting, and when the estimated rotary reaction force is small, the closing timing of the inlet valve is prohibited from being retarded and a reducing amount of the actual compression ratio during restarting is set smaller comparing to the case of the large rotary reaction force. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To determine the suitability of the ignition timing of an internal combustion engine implemented in promoting the warming-up of a purifying device (catalyst) for purifying the exhaust gas of the internal combustion engine. SOLUTION: When the engine is started by a motor generator, the temperature of exhaust gas is raised by adjusting an ignition advance angle F to a lag side to warm up the purifying device (S102). After the adjustment of the ignition advance angle F, an engine torque Te outputted from the engine is calculated on the basis of reaction torque acting upon the motor generator (S108) and it is determined whether or not engine torque Te is smaller than criterion torque Tref preset corresponding to an engine speed and an intake air amount (S112), and the engine torque reaches the criterion torque Tref or higher, it is determined that ignition timing adjustment has some failure to turn on a warning lamp (S118). Engine output torque and ignition timing have fixed relations, therefore the suitability of the ignition timing adjustment can be determined by monitoring the output torque. COPYRIGHT: (C)2004,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a motor operated valve control system for controlling driving electric power for a three-way change-over valve particularly at extremely low temperatures in a warm-up stroke of an internal combustion engine. SOLUTION: The motor operated valve control system determines that the three-way change-over valve is frozen when the temperature of cooling water is not higher than a predetermined value (Y of S16), and the working condition of the three-way change-over valve after a predetermined time elapsed after voltage supply starting does not reach a predetermined state (Y of S20), it is determined that the three-way change-over valve is frozen. When it is determined the freezing, a driving voltage is stopped to be supplied to the three-way change-over valve (S22). This enables the three-way change-over valve to avoid the risk of damage. An operator is informed to check the concentration of an anti-freezing solution in cooling water (S24) so that an incentive to maintenance can be improved. COPYRIGHT: (C)2004,JPO