Abstract:
PROBLEM TO BE SOLVED: To stably burn fuel in a combustion chamber if an average air-fuel ratio of mixture is rich when required load is small. SOLUTION: Low temperature combustion and normal combustion can be selectively performed, and main injection Qm for injecting fuel for mainly driving an internal combustion engine, and auxiliary injection Qv for injecting fuel for promoting combustion of the fuel mainly injected by the main injection can be performed. When it is required to make an air-fuel ratio of exhaust gas emitted from the combustion chamber rich when a required load is smaller than a prescribed value, first combustion is performed at a lean air-fuel ratio at an injection pattern for performing only the main injection at faster timing than a normal injection timing. Then, auxiliary injection is performed at faster injection timing than the timing of the main injection, and first combustion is performed at a rich air-fuel combustion at an injection pattern for performing the main injection at faster timing than a normal injection timing. COPYRIGHT: (C)2004,JPO
Abstract:
PROBLEM TO BE SOLVED: To improve the driveability by suppressing the vibration during engine starting in a control device of an engine and a hybrid vehicle. SOLUTION: A crank position sensor 21 to detect the position of each piston 52 in a DE 11, and an MG 13 capable of stopping the piston 52 at a predetermined position by revolving a crank shaft 20 of the DE 11 are used in an engine ECU 22. The MG 13 is driven on the basis of the detection results of the crank position sensor 21 during stopping of the DE 11 to make all the pistons 52 into a neutral position, and cranking is performed by the MG 13 during closing an intake port 55 with a SCV device 63 during the start of the following DE 11. When the rotational speed of the DE 11 device becomes not less than a predetermained rotational speed, the intake port 55 is opened by the SCV device 63 to start injection of the fuel. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide an engine control device capable of coping with waxing and freezing of fuel supplied as a lubricant, and capable of avoiding lubrication failure in gas oil fuel lubrication type engine using the fuel such as the gas oil as lubricating oil also. SOLUTION: The engine control device 1 is provided with a lubrication system fuel circulation circuit 3, an injection system fuel circulation circuit 4, an electric lubrication pump 6 incorporated in the lubrication system fuel circulation circuit 3, and ECU 12 for controlling operation of the electric lubrication pump 6. The engine control device 1 drives the electric lubrication pump 6 in accordance with the state such as the temperature of the fuel, and the fuel flows into the lubrication system fuel circulation circuit 3. Thereby, it is possible to cope with waxing and freezing of the fuel at the very low temperature, and lubrication failure such as runout of oil film and seizure at the time of start of the engine can be prevented. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To maintain a cooling effect of EGR gas always under a stable condition by regulating flow rate of refrigerant pumped to EGR cooler. SOLUTION: This system is provided with a hybrid electric equipment cooling system cooling EGR gas of an EGR device 35 by an EGR cooler 37 without receiving heat supply from a combustion chamber of the engine 11, and is provided with a variable water pump 44 varying flow rate of cooling water pumped to the EGR cooler 37. An inverter 19 is provided on a downstream side of a radiator 42 and on an upstream side of the EGR cooler 37, and delivery quantity of the variable water pump 44 is regulated based on EGR gas temperature detected by an exhaust gas temperature sensor 37a. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide an engine automatic stopping/starting control device of a hybrid vehicle capable of restraining the deterioration in fuel economy by increasing regenerative efficiency, by protecting an engine just after relatively long high load operation. SOLUTION: When decelerating from the high load operation, when the cooling water temperature is lower than the predetermined upper limit temperature (YES in Step S10, YES in S11, and NO in S12 and S13), after disengaging a clutch, an engine is stopped, and regenerative control by a motor generator is performed (Step S19 and S20). When the cooling water temperature is higher than the predetermined upper limit temperature (YES in Step S13), fuel is cut, and the clutch connection is continued, and a speed is reduced (Step S14), and engine automatic stopping control in a vehicle stopping state is prohibited until the cooling water temperature becomes less than the predetermined upper limit temperature (Step S15 to S18). COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a warmup control device for a hybrid vehicle capable of improving warmup ability during engine cold time and suppressing deterioration in fuel efficiency. SOLUTION: The warmup control device for a hybrid vehicle is equipped with a diesel engine 11, an MMT 12, a motor generator 17 for assisting power generation by engine output or engine output by electric power of a battery 20. The warmup control device is equipped with a warmup determination means for determining the warmup state of the engine 11, and an allocation ratio control means for controlling the allocation ratio of the output of the motor generator 17 and the output of the engine 11 according to a battery charge amount SOC and a driver demand output. The allocation ratio control means is structured to control the allocation ratio so that the output of the motor generator 17 is large and the output of the engine 11 is small until completion of warmup is determined by the engine warmup means. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To control a combustion condition of a diesel engine to the optimum condition. SOLUTION: Cylinder pressure sensors 29a to 29d for detecting pressure in a combustion chamber are provided in each cylinder of the diesel engine 1. An electronic control unit (ECU) 20 of the engine calculates a crank angle θmax at which product PV of cylinder pressure and actual cylinder volume becomes the maximum value, calculates a period ΔT from the start of fuel injection to θmax, and feedback-controls opening of an EGR valve 35 for adjusting amount of EGR gas supply to the engine so that the calculated ΔT becomes a target value decided based on current opening of an accelerator and the number of revolutions of the engine. Since ΔT can be computed without increasing computation load of the electronic control unit 20 of the engine, it is possible to control amount of EGR gas (EGR rate) to the optimum value accurately without increasing computation load. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a regeneration control method for an emission control device in a diesel hybrid vehicle capable of promoting the regeneration of PM of the emission control device by increasing the chance of the regeneration of PM of the emission control device also when an EV is running except when an engine is running. SOLUTION: When the engine is running and EV running conditions are established, low temperature combustion control as the temperature raising control of a PM collecting device is performed (steps S10 affirmation, step S20), and then the engine is stopped and PM is regenerated during the running of an EV (step S30, step S50, step S90). When the overheating of a catalyst must be avoided (step S40 affirmation) or air must be supplied to the catalyst (step S60 affirmation) during the running of the EV, a clutch is engaged to supply air to the PM collecting device to cool the catalyst so as to avoid overheating (step S100), and also oxygen is supplied to the catalyst in the shortage state of oxygen to promote oxidation reaction so as to promote the regeneration of PM (step S70). COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a technique for performing auxiliary injection while suppressing damage to a piston, when a fuel injection means of an internal combustion engine performs auxiliary injection in addition to main injection. SOLUTION: If need for a temperature rise control of an exhaust system is determined in a step S101, and a light/medium load range of an operational status of the internal combustion engine 1 is determined in a step S102, at least any one of operation is performed as follows: reducing opening of a nozzle vane of a turbocharger; throttling an exhaust throttle valve; and controlling a VVT mechanism. Then, VIGOM injection is performed in a step S104. The VIGOM injection can rise cylinder pressure at the timing where the VIGOM injection is performed, compared with the timing where the VIGOM injection is not performed, so that force of spray by the VICOM injection is reduced. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To prohibit deterioration of durability of an EGR device, while securing acceleration performance. SOLUTION: In a high pressure side EGR passage connecting an exhaust passage upstream of a turbine to an intake passage downstream of a compressor, a high pressure side EGR control valve is disposed. In a low pressure side EGR passage connecting an exhaust passage downstream of the turbine to an intake passage upstream of the compressor, a low pressure side EGR control valve is disposed. In a first range I where an engine load L is lower than a set load LS(N), the high pressure side EGR control valve is opened, while the low pressure side EGR control valve is closed. In a second range II where the engine load L is higher than the set load LS(N), the high pressure side EGR control valve is closed, while the low pressure side EGR control valve is opened. In a third range III where the engine load L is higher than an upper limit load LU(N), both the high pressure side EGR control valve and the low pressure side EGR control valve are closed. In transition from the first range I to the third range II where quick engine acceleration operation is conducted, the low pressure side EGR control valve is held in a closed state. COPYRIGHT: (C)2005,JPO&NCIPI