Abstract:
PROBLEM TO BE SOLVED: To improve a condition of control devices 100, 200 for a hybrid vehicle configured to use an engine 1 and a motor MG1 as a drive source for generating drive force for traveling and start the engine 1 through cranking by the motor MG1, so as to facilitate starting of the engine when the engine 1 does not autonomously rotate despite the cranking for a predetermined time period or more.SOLUTION: The control devices for a hybrid vehicle are configured to increase the amount of intake air when it is determined that the engine 1 does not autonomously rotate despite cranking by the motor MG1 to start the engine 1 continued for a predetermined period of time or more. When the engine 1 is determined to have autonomously rotated after the amount of intake air is increased, the cranking by the motor MG1 is stopped.
Abstract:
PROBLEM TO BE SOLVED: To eliminate inclusion of air in two system pipe without injecting fuel in an internal combustion engine including the two system fuel supply pipes. SOLUTION: An engine ECU executes a program including steps S1300, S1400 outputting a valve opening command signal to an electromagnetic relief valve and an operation command signal to a feed pump if air bleeding is required (YES in S1100), a step executing air bleeding process of a high pressure system until a predetermined time elapses (YES in S1600), steps S1700, S2000 outputting a valve closing command signal to the electromagnetic relief valve and a stop command signal to the feed pump, and a step S2300 outputting an opening command signal for dummy injection to an injector for intake air passage injection of a low pressure system. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To suppress reduction in the temperature of a catalyst during motor traveling. SOLUTION: When a catalyst bed temperature Tc as the temperature of a ternary catalyst installed in the cleaning device of an engine becomes a first temperature T1 or less which is higher than a lower limit temperature at which the catalyst functions during motor traveling (steps S100 to S120), the engine is started (step S190), and while the engine is operated at an operation point at which it can be efficiently operated (steps S200 to S220), two motors outputting driving force based on a request power Tr* to a drive axle are controlled (steps S230 to S270). Thus, it is possible to suppress the reduction in the catalyst bed temperature Tc to the first temperature T1 or less, and to suppress the emission of harmful components in the next start of the engine 22. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an accidental fire determination device, a hybrid car and an accidental fire determination method by which the accidental fire of an internal combustion engine can be determined without performing any complicated processing in a power output device for executing damping control for suppressing the vibration of an internal combustion engine by at least one of a power generating means and a motor. SOLUTION: When a P-position is selected as a shift position (S130), and damping control for suppressing the vibration of an engine 22 is executed by a motor MG1 and a motor MG2, thresholds A1, B1 and C1 to be used for deciding accidental fire are set (S180), and the accidental fire is decided by using the set threshold. On the other hand, when an N position is selected, and damping control is not executed, thresholds A2, B2 and C2 larger than threshold values A1, B1 and C1 are set (S210), and the accidental fire is decided by using the set threshold. Thus, it is possible to decide the accidental fire by much simpler processing by changing the threshold to be used for deciding the accidental fire to decide the accidental fire based on the presence/absence of the execution of damping control. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To increase the energy efficiency of a vehicle by operating an internal combustion engine in a power output system according to the status of the power output system. SOLUTION: The hybrid vehicle, which outputs power from the engine to a driveshaft connected to driving wheels through torque conversion by a planetary gear mechanism and two motors connected to rotary elements of the planetary gear mechanism, stores a plurality of different operation lines LP and L0 to L3 constraining the power output from the engine by different conditions, and sets one operation line according to vehicle speed, motor status and the like in operating the engine and controlling the drive of the two motors. This can increase the energy efficiency of the vehicle and can adjust to output limitations on equipment such as the motors. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To prevent an electric storage means such as a secondary battery from being charged beyond the limit of charged capacity. SOLUTION: In a hybrid automobile 20 in a power output device, idle time suction air capacity Qidl is corrected so that an output power Pe almost matched with a request power Pe* can be outputted by an engine 22 just after the start of the engine 22, and a motor MG1 is made to generate a power according to an output power Pe from the engine 22 after correction, and suction air capacity correction quantity Qec is reflected on suction air capacity Qe of the engine 22 so that a battery 50 can be charged within an input limit Win by a generated power, and the motor MG1 is controlled. Therefore, when the charged capacity of the battery 50 is limited, the output power Pe of the engine 22 is prevented from exceeding the request power Pe* so that the charged capacity of the battery 50 to be charged according to the generation power of the motor MG1 can be prevented from exceeding the input limit Win. 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 detect the malfunction of a selector valve for selecting a passage for exhaust gas. SOLUTION: An ECU executes a program which includes a step (S1100) of comparing the detected temperature of exhaust gas with a map value when controlling the selector valve to be closed (YES in S1000), a step (S1300) of determining the selector valve to be normal when the temperature of the exhaust gas is higher than the map value (YES in S1100), and a step (S1400) of determining the selector valve to be abnormal when the temperature of the exhaust gas is lower than the map value (NO in S1100). COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To stably operate an engine at idling. SOLUTION: When a shift position SP is neutral (step S110), the ignition timing Ea* of an engine is set at a timing advanced by Eα from a timing in a normal idle operation since the driving of a motor cannot be controlled (step S150), the set ignition timing Ea* is transmitted to an engine ECU (step S160), and an ignition control is performed so that the ignition timing of the engine becomes the set ignition timing Ea*. Since a torque outputted from the engine is increased over that in the idle operation, a negative torque acting on the output shaft of the engine by the corotation of the motor by the engine can be cancelled, and the engine can be stably operated at idling. COPYRIGHT: (C)2006,JPO&NCIPI
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