Abstract:
PROBLEM TO BE SOLVED: To suppress a disadvantage, for example, in which when a warm-up request for a purification catalyst of a purification unit is made, combustion in an internal combustion engine becomes hard to stabilize.SOLUTION: When a warm-up request for a purification catalyst is made, if a catalyst temperature Tc falls below a threshold Tcref, an engine and two motors are controlled so that while the engine is continuously operated at a first predetermined operation point (the number of revolutions Ne1 and torque Te1), a vehicle is run with a power based on a running power Pdrv* (S150 and S250 to S290). If the catalyst temperature Tc is equal to or larger than the threshold Tcref, the engine and two motors are controlled so that while the engine is continuously operated at a second predetermined operation point (the number of revolutions Ne2 and torque Te2) within a range, in which an output of the engine gets larger than that at the first predetermined operation point, the vehicle is run with the power based on the running power Pdrv* (S160 to S200 and S250 to S290).
Abstract:
PROBLEM TO BE SOLVED: To appropriately restart an engine after intermittent stop of the engine of a hybrid vehicle.SOLUTION: A throttle body temperature control apparatus (30) is configured to control the temperature of a throttle body (14) of an engine (11) mounted on a hybrid vehicle (1) by circulating cooling water of the engine to the throttle body. The throttle body temperature control apparatus stops the circulation of the cooling water to the throttle body under the condition where a temperature of the cooling water is high.
Abstract:
PROBLEM TO BE SOLVED: To provide a hybrid vehicle that can improve power generation amount by a second motor generator.SOLUTION: A hybrid vehicle 100 includes an engine 1, a power dividing mechanism 2, a generator MG1, a motor MG2, and an HVECU 11. The HVECU 11 is configured to motor the engine 1 by the generator MG1 when the supply of fuel to the engine 1 is stopped during traveling. In addition, when the supply of fuel to the engine 1 is stopped during traveling and a brake pedal 23a is operated, the HVECU 11 is configured not to motor the engine 1 by the generator MG1.
Abstract:
PROBLEM TO BE SOLVED: To prevent such inconvenience that combustion is not stably performed in an internal combustion engine when a warm-up of a purification catalyst of a purification device is requested.SOLUTION: When a warm-up of a purification catalyst is requested, an engine and two motors are controlled so that the travel is performed by power based on travel power Pdrv* while continuously operating the engine at a first prescribed operation point (rotational speed Ne1 and torque Te1) when a catalyst temperature Tc is lower than a threshold Tcref (S150, S250 to S290), and the engine and the two motors are controlled so that the travel is performed by power based on travel power Pdrv* while continuously operating the engine at a second prescribed operation point (rotational speed Ne2 and torque Te2) within the range where an output from the engine is larger than that of the first prescribed operation point when the catalyst temperature Tc is equal to or higher than the threshold Tcref (S160 to S200, S250 to S290).
Abstract:
PROBLEM TO BE SOLVED: To provide a hybrid vehicle for suppressing a deterioration in emission in starting an internal combustion engine, and for achieving sufficient lubrication, even when the internal combustion engine is operated with a high load and a high rotation just after the start, and also to provide a method for controlling the hybrid vehicle. SOLUTION: When the system start of a hybrid vehicle is performed, and the hybrid vehicle travels by electric traveling while an engine is not started in an electric traveling priority mode, and when an engine water temperature Tw is equal to or higher than a threshold Twref, and a vehicle speed V is equal to or higher than a threshold Vref or the absolute value of acceleration α is equal to or more than a threshold αref, a drive control of a motor MG1 is performed, and the motoring of the engine is performed to a reverse rotational direction while a fuel injection or ignition is not performed (S220, S240 to S280). Thus, even when fuel leaks owing to oil seal leak from a fuel injection valve, the fuel which has leaked is returned to an intake system, and the deterioration in emission is suppressed in starting the engine. The lubrication of the engine with lubricating oil is achieved thereby. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a control device for vehicle which can almost avoid an insufficient braking force. SOLUTION: An ECU executes a program provided with steps of: controlling a plug-in hybrid vehicle to travel in an EV traveling mode of traveling with only MG (motor generator) as the drive source (S100); determining, when an operation of turning on an EV cancel switch is performed (YES in S102), whether the SOC of a battery is larger than a threshold A (S104); releasing, when the SOC of the battery is the threshold A or less (NO in S104), the EV traveling mode, and controlling the vehicle to travel in an HV traveling mode of traveling an engine or the MG as the drive source (S108); and continuing, when the SOC of the battery is larger than the threshold A (YES in S104), the control of the vehicle to travel in the EV traveling mode (S106). COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To suppress emission deterioration when an internal combustion engine starts. SOLUTION: A correction coefficient (k) is so set (S100 to S160) that it tends to be reduced according as the rotation TCR of the crankshaft of the internal combustion engine is increased from the starting of the cranking of the internal combustion engine until the first determination of a crank angle CA by detection of a chipped tooth (a reference position) formed in the timing rotor of a crank position sensor. The amount of air sucked for control KL* is so set (S170) that the estimated amount of air sucked KL estimated based on the engine speed Ne of the internal combustion engine, a throttle opening Th and intake pipe vacuum Pin is multiplied by the correction coefficient (k). The first amount of fuel injected τ is set with respect to the set amount of air sucked KL* for control (S180). Fuel injection is performed by using the set first amount of fuel injected τ. Thereby, it is possible to appropriately perform fuel injection and to suppress the emission deterioration when the internal combustion engine starts. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To accurately specify a factor causing imbalance in air-fuel ratio between cylinders in a multi-cylinder type internal combustion engine equipped with an EGR device. SOLUTION: An engine 10 has cylinders 11-14 respectively connected to branch pipes 21-24 branched from a main pipe 20 as an intake manifold 16. Fuel injection valves 71-74 are attached to the branch pipes 21-24. Further, the branch pipes 21-24 are connected to branch pipes 61-64 branched from an EGR pipe 52 on a downstream side of the EGR valve 56, and exhaust gas introduced from the EGR valve 56 is fed to each of the branch pipes 21-24. An ECU 1000 detects imbalance of air-fuel ratio among cylinders based on cylinder-by-cylinder air-fuel ratio detected by air-fuel ratio sensors 81-84 provided in branch pipes 31-34 as an exhaust manifold 18. If there is an imbalance in air-fuel ratio among cylinders, the EGR valve 56 is closed, and thereafter, imbalance in air-fuel ratio among cylinders is detected again. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To suppress frequent repetitions of the starts of a fuel cut and a fuel injection when the learning of an idling control quantity that is a control quantity of an idling operation of an engine has not been completed. SOLUTION: When the learning of the idling control quantity has not been completed (S120), a prescribed rotation frequency N2, which is larger than a prescribed rotation frequency N1 after the completion of the learning, is set to a threshold Nref1 (S140), and the engine is controlled so as to cause the idling operation (S170) accompanied by the fuel cut due to the excess of a rotation frequency Ne of the engine in exceeds of a threshold Nref1 (S210). Thereby, when the learning has not been completed, an intake air quantity of the engine is set to a larger quantity than that of after the completion of the learning in order to avoid stall of the engine, the tendency for the fuel cut of the engine may be suppressed, and the frequent repetition of the starts of the fuel cut and the fuel injection is suppressed. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a valve timing control unit capable of miniaturizing an electric motor driving a variable mechanism for valve timing. SOLUTION: The electronic control unit 41 drives the electric motor 71 for VVT drive in a state of turning a crank shaft 17 through a motor generator 52 to a side where cam torque giving resistance is reduced when valve timing change is required for engine start. COPYRIGHT: (C)2007,JPO&INPIT