Abstract:
PROBLEM TO BE SOLVED: To decide the degree of fatigue of a rotation system connected to an internal combustion engine, with higher accuracy. SOLUTION: When resonance phenomena occur in a rotation system connected to an engine of rotational frequency Ne because of the change in its rotational frequency (S110), an input torque Tlim which acts on the rotation system as the size of resonance phenomena Ne is measured based on the size of change of this rotational frequency (S120). An endurance time tlim of a rotation system in the case assuming that this input torque Tlim continued and acted is set up. A fatigue degree ΔS of a rotation system per unit time is calculated, by dividing the unit time to (execution period of a routine) by the endurance time tlim (S130 to S140), and degree of fatigue S of a rotation system is calculated by integrating this (S150). When the fatigue degree S reaches a value 1, a warning display is made as the limit of fatigue (S160, S170). Thereby, the fatigue degree for a rotation system can be decided more accurately. 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
Abstract:
PROBLEM TO BE SOLVED: To solve a problem that it may be impossible to effectively collect warm water in a heat storage system for an internal combustion engine. SOLUTION: When an ECU refers to a hysteresis of an accelerator opening, and determines that the accelerator opening (S10a) is small, it is supposed that a peak value and a mean value in the temperature of cooling water for the internal combustion engine are low, and lowers a warm water collection starting temperature from an initial value (S12). When it is supposed that the accelerator opening is in an average (S10b), a collection starting temperature is left to be the initial value (S14) as it is. When it is supposed that the acceleration opening is great (S10c), a warm water collection starting temperature is raised from the initial value (S16). COPYRIGHT: (C)2004,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide electric power supply structure capable of effectively supplying electric power to a temperature raising device for an in-vehicle instrument. SOLUTION: The temperature raising device for the in-vehicle instrument makes an electric motor and an internal combustion engine 11 be drive sources, and is applied for a hybrid vehicle equipped with an inverter 17 with a converter which lowers output voltage of an HV battery 16 to DC14V and inputs it to an auxiliary machine and an auxiliary machine battery 23. When cooling water stored in a thermal storage tank 21 is supplied to the internal combustion engine 11 with an electric water pump 22 to raise the temperature of the engine 11, the water pump 22 is driven by the output voltage from the HV battery 16 lowered to DC14V through the inverter with the converter. When the cooling water is stored into the thermal storage tank 21 in accompany with the turning-off of an ignition switch, the water pump 22 is driven with DC12V from the auxiliary machine battery 23. COPYRIGHT: (C)2004,JPO
Abstract:
PROBLEM TO BE SOLVED: To prevent lowering of heater performance during stopping of an internal combustion engine, in a vehicle such as a hybrid automobile wherein the internal combustion engine is temporary stopped. SOLUTION: If a heater is in operation (Y of S10), ECU determines whether the internal combustion engine stops (S12). When the internal combustion engine is stopped (Y of S12), the ECU confirms that the temperature of cooling water is not less than a specified value (Y of S14), and compares the temperature of the cooling water with the temperature of hot water in a thermal storage tank. When the temperature of the hot water in the thermal storage tank is higher than that of the cooling water (Y of S16), the ECU controls a three-way switching valve to supply the hot water in the thermal storage tank to the heater (S18). COPYRIGHT: (C)2004,JPO
Abstract:
PROBLEM TO BE SOLVED: To avoid the situation of becoming in capable of restarting a driving force source after stopping the specific driving force source. SOLUTION: Before automatic stopping processing of an engine, determination is made on whether or not the engine can be restarted by a starter MG. When determining that the engine is in a condition that power generation is performed by the starter MG (YES in Step 110), power generation processing by the starter MG is performed (Step 110). Next, when determining that the power generation in normally performed by the starter MG (YES in Step 130), a starter MG normal flag exstmg is set to ON (Step 140). When determining that the power generation is not normally performed (NO in Step 130), the starter MG normal flag exstmg is set to OFF (Step 150). COPYRIGHT: (C)2004,JPO
Abstract:
PROBLEM TO BE SOLVED: To enable air-fuel ratio control which can make compatible both the reduction of NOx and the prevention of the generation of catalyst exhaust smell. SOLUTION: At the load operation of an engine for charging a battery during stopping, a target air-fuel ratio is made nearer to a rich side than a stoichiometric air-fuel ratio thereby carrying out the air-fuel ratio control (step S140), whereby an oxygen amount in a three-way catalyst is changed so as to be far from the generation condition of NOx, and the NOx in exhaust gas is reduced. Together with this, by carrying out the air-fuel control for a predetermined time of A second from a charge starting time (steps S130, S150), the generation of the catalyst exhaust smell due to the exhaustion of oxygen in the three-way catalyst can be prevented. Accordingly, in charging of the battery during stopping, the air-fuel ratio control which can make compatible both the reduction of NOx and the prevention of the generation of the catalyst exhaust smell is realized.
Abstract:
PROBLEM TO BE SOLVED: To provide a battery power distribution control device capable of smoothly performing the start of an engine by restricting the drive of an auxiliary unit in accordance with the residual capacity of power in the power supply of a vehicle. SOLUTION: The SOC, voltage, temperature, etc., of a battery are fed to a limit value calculation part 30, and the allowable battery output or battery voltage is grasped as the residual capacity of power of the battery. In accordance with the allowable battery output or battery voltage, the limit value calculation part 30 calculates the limit value of an oil pump motor 22, and the obtained value is fed to an oil pump motor control part 28. The oil pump motor control part 28 limits the torque or revolving speed of the oil pump motor 22 in accordance with the limit value. This allows securing the power supplied to a cranking motor 10, which allows the engine 12 to be started smoothly.
Abstract:
PROBLEM TO BE SOLVED: To reduce shock during the transient period when a load operation state for generation changes into a no-load operation state including idling or motoring in a hybrid vehicle. SOLUTION: With regard to a hybrid power outputting device comprising an engine and a generator connected mechanically, the output torque of the generator is controlled so that it may not change suddenly during the transient period when the load operation state shifts to the no-load operation state. As a means, the minimum revolutions of an internal combustion engine under the load operation state is set to the revolutions by about 200 rpm larger than those under the no-load operation state. This setting makes the revolutions of the engine change smoothly during the period from the load operation state to the no-load operation state. Because the sudden change of torque of the generator under the PI-control based on the revolutions of the engine can be suppressed, the shock to be caused by the sudden change of torque can be reduced.
Abstract:
PROBLEM TO BE SOLVED: To improve detecting accuracy of misfire by certainly avoiding mis- detection of misfire of an internal combustion engine in a hybrid vehicle. SOLUTION: An operation state of a motor of the hybrid vehicle is detected, and a driving condition of the vehicle is detected. The motor is connected to an axle, so that the driving condition of the vehicle can be accurately detected. Based on the detected driving condition, whether or not the hybrid vehicle is driven is discriminated under a predetermined mis-detection assuming condition that may satisfy a miss detection condition of the misfire of the internal combustion engine. When the driving under the mis-detection assuming condition is determined, a misfire detecting process is suppressed or stopped. Thus, the condition that may cause mis-detection of the misfire is detected, and the misfire detecting process is suppressed or stopped before satisfying of the misfire condition, thereby certainly avoiding mis-detection of the misfire. When the mis- detection of the misfire can be certainly avoided, detection sensitivity of the misfire can be improved and slight misfire can be accurately detected.