Abstract:
PROBLEM TO BE SOLVED: To further accurately grasp whether "backlash elimination" by an output of press-push torque in an electric motor for suppressing a "gear noise" of a gear mechanism in a hybrid vehicle having a constitution that an internal combustion engine and the electric motor are connected to an axle via the gear mechanism is performed.SOLUTION: A backlash elimination determination means determines whether the backlash elimination in a power transmission mechanism in the stop of a vehicle and in an operation of the internal combustion engine is performed by using a backlash elimination determination reference value which is set according to a lapse time after the start of the operation of the internal combustion engine.
Abstract:
PROBLEM TO BE SOLVED: To accurately control engine output even when throttle opening is feedback-controlled in a method that is changed depending on an engine control mode in a hybrid vehicle. SOLUTION: An ECU feedback-controls the throttle opening by ISC (Idle Speed Control) control during autonomous operation of an engine, and by Pe-F/B control different from the ISC control during load operation of the engine. During the Pe-F/B control, the throttle opening is controlled by using feedback amount eqi during the ISC control and feedback amount efb during the Pe-F/B control stored in the ECU. When a total value of the eqi and an ISC learning value eqg is changed, the ECU performs offset correction for offsetting the amount equivalent to the change amount of the total value from the efb when there is an execution history of the Pe feedback control, and does not perform the offset correction when there is no execution history of the Pe feedback control. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a battery temperature control apparatus capable of properly warming up a battery without using a dedicated humidity sensor. SOLUTION: The battery temperature control apparatus warms up the battery by feeding the air in a cabin to the battery, and determines whether or not to warm up the battery based on the temperature of the air in the cabin. Specifically, a battery warming-up determination means determines whether or not to warm up the battery according to the setting of conditioning in the cabin. Accordingly, the apparatus can properly determine whether or not to warm up the battery without using the dedicated humidity sensor for detecting the humidity in the cabin. Thus, the cost can be reduced in comparison to using the dedicated humidity sensor or the like. Further, the opportunity of warming up the battery can be increased in comparison to determining whether or not to warm up the battery based on the saturated vapor density without using the dedicated humidity sensor. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To appropriately prevent relatively low-temperature air from being blown from a heater blower after the circulation of cooling water is started as requested by a heater. SOLUTION: A heating device of a vehicle includes a pump to circulate the cooling water, a heater core to exchange heat between the cooling water and air, and the heater blower to cause the air to flow from the heater core. A control means starts blowing out air from the heater blower when the temperature of the cooling water reaches or exceeds a first prescribed temperature after changed to an increase from a decrease after the circulation of the cooling water is started as requested by the heater. This appropriately suppresses the heater blower from blowing out air, for example, when the cooling water temperature is lowered. The heating device can therefore appropriately prevent deterioration in air conditioning performance caused by the blowing of the relatively low-temperature air into a vehicle interior from the heater blower after the start of the circulation of the cooling water requested by the heater. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To accurately suppress a temperature rise of recirculation gas when a recirculation valve is abnormal and suppress deterioration of peripheral components of an intake pipe due to overheat in a vehicle using an internal combustion engine that recirculates exhaust gas and a rotary electric machine as power sources. SOLUTION: When an opening abnormality occurs in an EGR valve, an ECU controls a water pump to maximize the flow rate of engine cooling water distributed inside an EGR cooler. When the cooling water is maximized by the water pump (YES at S202), and when engine water temperature exceeds a threshold value α (YES at S204), the ECU limits engine request power to a prescribed upper limit value (S206), calculates the target engine rotational speed based on the engine request power (S208), and controls the rotational speed of MG (1) to match the target engine rotational speed. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To promptly output power based on demands of a driver while suppressing vibration upon starting of an internal combustion engine. SOLUTION: When automatically starting an engine, upon a normal engine start, the amount of intake air is reduced by tightening the opening of a throttle valve (S140). When the driver presses down hard on the accelerator pedal, and an engine request power Pe* is a threshold value Pref or more, the throttle valve opening is an opening according to the request engine power Pe* (normal opening) and the amount of intake air is an amount corresponding to the engine demand power Pe* (S150). Cranking is performed to start the engine. Thereby, on a normal start of the engine, vibration at initial explosion can be suppressed, and when the requested engine power Pe* is large, driving power from the engine can be promptly outputted. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To restrain degradation in an engine from proceeding even though automatic start and stop of the engine are repeated. SOLUTION: Automatic stop time-period T of the engine 20 is not substantially limited before the number of times N of starting in an oil-film runout state (the number of times of starting the engine 20 in an oil-film runout state) reaches N1, but after the number of times N of starting in an oil-film runout state has reached N1, the automatic stop time-period is limited. Particularly when the number of times N of starting in an oil-film runout state has reached a threshold Nthr, the stop permissible time Tp is set at oil-film runout time limit Tlim. As a result, when the automatic stop time-period T exceeds the Tlim, the engine 20 is automatically started. When the number of times N of starting in an oil-film runout state has reached the threshold Nthr, even though the engine 20 has automatically stopped, the engine is not started in the runout oil-film state, so the engine degradation hardly proceeds. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To restrain the adjustment, accompanied with operation of an internal combustion engine from being interrupted, by enabling excessive power generated by execution of adjustment to be charged in a battery 50, and to quickly perform the adjustment by securing the opportunity of executing the adjustment. SOLUTION: When executing adjustment accompanying by operation of an engine 22, auxiliary equipment 68 is driven at its maximum possible (S205), and also at braking, the torque Tb* of mechanical brakes 64a and 64b is increased, to suppress the regenerative control of a motor MG2 (S214 and S230); the engine 22 is driven at an operation point required for adjustment (S200). COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To detect abnormality of a rear exhaust gas sensor arranged in a downstream of a catalytic converter with sufficient accuracy. SOLUTION: An engine ECU 50 performs control alternately setting target air fuel ratio to a predetermined lean air fuel ratio until an output value of the rear exhaust gas sensor 36 indicates lean and to a predetermined rich air fuel ratio until an output value of the rear exhaust gas sensor 36 indicates rich. Oxygen occlusion quantity of an exhaust emission control catalyst 31 is calculated based on output value of the rear exhaust gas sensor 36. Oxygen consumption quantity of oxygen consumption composition included in the catalytic converter 30 is corrected based on temperature of the exhaust emission control catalyst 31. Oxygen occlusion quantity is corrected based on corrected oxygen consumption quantity and temperature of the exhaust emission control catalyst 31. It is determined whether oxygen occlusion quantity exceeds a predetermined value (value adding margin to the maximum oxygen occlusion quantity calculated beforehand) or not. If the value exceeds the predetermined value, abnormality of the rear exhaust gas sensor 36 is detected. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To make the control simple even when there are a plurality of elements which should be prepared for starting up an internal combustion engine. SOLUTION: A delay time Tset in a normal state is set to a predetermined time Ts1 based on an engine coolant temperature Tw and a state of an air conditioner switch. The predetermined time Tsl is determined based on a time necessary for completing preheating of an engine 22 by a preheating device, preparations of sensors such as an air/fuel ratio sensor, and warming-up of an exhaust gas clean-up device (S100, S110). When it is determined that the vehicle can run using a motor based on a required torque Td*, a required power P* and the remaining capacity (SOC) of a battery (S120 to S150); the engine is started after the delay time Tset has elapsed. As a result, it is possible to efficiently perform start of the engine and operation immediately after the engine starts, and to make control at the time of starting the engine simple compared with the case where the engine is started after making determinations as to whether various preparations have been completed. COPYRIGHT: (C)2004,JPO