Abstract:
PROBLEM TO BE SOLVED: To reduce unpurified components contained in exhaust gas.SOLUTION: A vehicle provided with a motor generator as a driving source comprises a battery for supplying power to the motor generator, an engine, and an ECU for controlling the vehicle in either control mode of a CS mode or a CD mode which limits the occasion of engine operation compared to the CS mode. When the engine is started, at least caused by decrease in a residual capacity of the battery during vehicle control in the CD mode, the ECU controls the engine according to a condition different from a condition used for controlling the engine in the CS mode.
Abstract:
PROBLEM TO BE SOLVED: To properly calculate a supply amount of fuel at the start of an internal combustion engine.SOLUTION: This control device (100) is used in a hybrid vehicle (10) which comprises the internal combustion engine (200) operated by the combustion of the fuel and an electric motor (MG2) operated by utilizing power charged to a battery (500), and can travel at EV-traveling mode using the power of the electric motor without starting the internal combustion engine. The control device comprises a calculation means (102) which calculates the actual supply amount of the fuel to the internal combustion engine on the basis of a traveling distance at the EV-traveling mode which has been executed until the start of the internal combustion engine at the start of the internal combustion engine.
Abstract:
PROBLEM TO BE SOLVED: To properly control diagnostic processing on an evaporation system even if a correlation between the fuel temperature in the evaporation system and the cooling water temperature for estimating the fuel temperature is varied by pre-air-conditioning during stop of an internal combustion engine.SOLUTION: When there is an operation history of the pre-air-conditioning during stop of the internal combustion engine (YES in S122), the correlation between the fuel temperature and the cooling water temperature varies. Therefore, the reference temperature for determining the cooling water temperature to be used for determining a leak diagnosis execution condition of evaporation leak diagnostic processing control, is corrected according to the operation history of the pre-air-conditioning (S124 and S126). Thus, even if pre-air-conditioning operation is executed, whether or not the actual fuel temperature in the evaporation system exists in a proper range for leak diagnosis, can be determined based on the cooling water temperature, and leak diagnostic processing can be properly controlled.
Abstract:
PROBLEM TO BE SOLVED: To suppress deterioration of emission at start-up by properly starting an internal combustion engine when the internal combustion engine intermittently operates that requires warm-up during EV-priority mode. SOLUTION: When a cooling water temperature Tw is less than a predetermined temperature Tref at the time of the engine start during EV-priority mode, correction coefficients k1, k2, k3 are set so that a fuel increase amount becomes smaller as a temperature of a combustion chamber becomes higher by use of an engine start speed Nst, a previous operation duration time Tcont, and an operation stop lapsed time Tstop as parameters having correlation with the temperature of the combustion chamber of the engine (S530), a basic fuel increase amount τ0 determined in advance as the fuel increase amount required when the warm-up of the engine is required is multiplied by the correction coefficients k1, k2, k3 to calculate the fuel increase amount τα (S540), a fuel injection using the calculated fuel increase amount τα is performed, and the engine 22 is started (S550). COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a hybrid vehicle that starts an engine at more proper timing and travels. SOLUTION: When an electric travelling mode that prioritizes electric travelling to travel by using an only power outputted from motor 42 is set, the longer an engine stopping time (tstp) when the engine 32 is stopped, the lower speed is set to electric travelling permission speed Vpm (S130). When a vehicle speed V is larger than the electric travelling permission speed Vpm while the engine 32 is being stopped, the engine 32 and motors 41 and 42 are controlled to be travelled with a requested torque by starting the engine 32 (S140, S160). COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To more properly perform warming-up of a catalyst even if a travel state, or a temperature, travel mode or the like of an internal combustion engine changes in the middle of the catalyst warming-up, and to prevent imparting an incongruity sense to a driver or an occupant. SOLUTION: A hybrid vehicle is controlled such that the hybrid vehicle travels while performing the catalyst warming-up in a state that a catalyst warming-up condition suitable for the catalyst warming-up when operating an engine at a normal engine speed is set without changing an engine speed-up request flag Fup until the catalyst warming-up is completed when setting a value 0 to the engine speed-up request flag Fup such that the catalyst warming-up is performed by operating the engine at the normal engine speed (S630), and is controlled such that the hybrid vehicle travels while performing the catalyst warming-up in a state that a catalyst warming-up condition suitable for the catalyst warming-up when operating the engine at a large engine speed is set without changing the engine speed-up request flag Fup until the catalyst warming-up is completed when setting a value 1 to the engine speed-up request flag Fup such that the catalyst warming-up is performed by operating the engine at the engine speed larger than the normal engine speed. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a fuel injection controller for an internal combustion engine capable of suppressing excessive amount of fuel injection while suppressing a lean air fuel ratio in correcting an increment in target injection amount at start of the engine. SOLUTION: An electronic controller corrects an increment in target injection amount over a predetermined increment correction period after starting the port injection gasoline engine, and reduces incremental correction amount gradually after going through every combustion cycle (refer to the two-dot chain line). The electronic controller corrects an increment in target injection amount for the first time combustion cycle such that fuel required for initial explosion is supplied to a combustion chamber. Furthermore, the electronic controller reduces incremental correction amount for a predetermined period (transport lag combustion period) near the first time combustion cycle out of the increment correction period of target injection amount (refer to the full line), and decreases the degree of reduction gradually after going through the second and subsequent each combustion cycle. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To suppress happening of inconvenience such as misfire of an internal combustion engine even under an unstable combustion condition of the internal combustion engine. SOLUTION: In a power output device, hold request to hold an operation point (target rotation speed, target torque) of the engine is established (S360) when property of fuel is heavy, and output torque of the engine is unstable or air fuel ratio feed back correction quantity Tset is unstable (S300-S350). Then, the established hold request is removed when output torque of the engine gets stable and air fuel ratio feedback correction quantity Tset gets stable (S340, S350). Consequently, inconvenience such as misfire by changing the operation point when combustion of the engine is unstable. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To sufficiently secure the exhaust emission purification performance of an engine while coping with a drive force requirement requested by a driver. SOLUTION: While the state of an EGR valve is switched from off to on or from on to off, an engine-requested power Pe* to be outputted from an engine 22 set based on a requested torque Tr* requested for a drive shaft is maintained at the engine-requested power (previous Pe*) set immediately before the switching of the EGR valve (S120) and the torque instruction Tm2* of a motor is set so that the requested torque Tr* can be outputted to the drive shaft (S122) to drivingly control the engine and the motor (S118). Since the simultaneous switching of the state of the EGR valve and a variation in load on the engine is suppressed, the exhaust emission purification performance is secured. Naturally, the requested torque Tr* is outputted to the drive shaft. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To suppress temperature rise in an engine compartment.SOLUTION: On a vehicle, there are installed: a hood 182 that closes an engine compartment 180 under a state fixed by a hood lock 184 and is opened when fixing by a hood lock 184 is released; an engine 100 stored in the engine compartment 180; and a motor generator 110 driven by the engine 100. Fixing by the hood lock 184 is released while the engine 100 and the motor generator 110 are being controlled to supply electric power from a vehicle to an external apparatus of the vehicle.