Abstract:
PROBLEM TO BE SOLVED: To provide a novel catalyst device capable of efficiently converting ammonia to N2 within a wide temp. range and a high SV region to purify the same. SOLUTION: A catalyst high in the max. conversion temp. oxidizing ammonia to convert the same to nitrogen to maximize a conversion ratio is arranged on the upstream side of an exhaust gas passage and a catalyst low in the max. conversion temp. is arranged on the downstream side of the exhaust gas passage. Within a low temp. region, ammonia is not almost purified by the catalyst on the upstream side but purified by the catalyst on the downstream side and, within a high temp. region, ammonia is mainly purified by the catalyst on the upstream side to be converted to nitrogen.
Abstract:
PURPOSE: To highly efficiently purify components of HC, CO, NOx in exhaust gas of an internal combustion engine by converting total quantity of NOx in the exhaust gas to NOx in quantity to form N2 and H2 O by way of reacting with N2 , NH3 , etc., in proper quantities. CONSTITUTION: An exhaust passage 4 of an internal combustion engine 1 is branched to branch passages 4a, 4b in the downstream of three-way catalyst 11, and a denitrated/oxidated catalyst 15 is provided in an exhaust passage 5 after the branch passages join. An oxidated catalyst 13 is arranged in the branch passage 4a, and a dummy resistor 17 is arranged in the branch passage 4b respectively. Total quantity of NO in engine exhaust is once converted to N2 and NH3 by the three-way catalyst, NH3 in the branch passage 4a is converted to NOx in total by the oxidated catalyst 13. Proportion of exhaust flow rates of the branch passages 4a, 4b is set so that NOx in quantity to react with NH3 passing the branch passage 4b in proper quantities is generated by the oxidated catalyst of the branch passage 4a. NH3 and NOx in exhaust air react with the denitrated/oxidated catalyst after joining, and their total quantity is converted to N2 and H2 O.
Abstract:
PURPOSE:To set an ideal fuel injection timing in the all rotational range of an internal combustion engine, in a fuel injection timing control device for controlling the fuel injection timing to the internal combustion engine provided with a variable valve timing mechanism. CONSTITUTION:It is judged whether the opening timing of an intake valve set by a variable valve timing mechanism is an early opening timing or not (Step 100). When the opening timing is early, fuel is injected after a top dead point when the opening change rate TA of a throttle valve is a prescribed value (x) or more (Step 120) since the level of back blow is large. When the relation between YA and (x) is YA
Abstract:
PROBLEM TO BE SOLVED: To improve comfortableness in a hybrid vehicle. SOLUTION: In this hybrid vehicle 10, an ECU 100 can operate an engine 200 at its lean limit or combustion limit by performing MG1 feedback control. On the other hand, when a shift position of a shift lever is in an N-range and the MG1 feedback control is performed, the ECU 100 makes MG2 to output motor torque Tm corresponding to generator torque Tg outputted for suppressing a torque reaction of the engine 200. Thereby, torque Tep in an opposing direction to that of the generator torque Tg applied to a ring gear shaft 302 and motor torque Tm are offset, and such a problem that power is transmitted to an axle 11 connected to the ring gear shaft 302 in spite of the N-range can be solved. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To optimize operation with considering traveling performance at a time of automatic start in a system provided with an internal combustion engine automatically started and stopped such as an idling stop vehicle and a hybrid vehicle. SOLUTION: This device is provided with a variable valve train 48 capable of changing open and close timing of at least an intake valve, an automatic start/stop means automatically starting and automatically stopping an internal combustion engine when a predetermined condition is established, an acceleration demanding degree estimation means estimating acceleration demanding degree to a vehicle when the vehicle is automatically started from automatic stop condition, and a valve timing control means closing an intake valve 36 and controlling timing according to the estimated acceleration demanding degree. Since the intake valve can be closed at the optimum timing corresponding to acceleration demanding degree, the engine can be started quickly at a time of automatic start or noise or vibration can be reduced at a time of automatic start. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To improve fuel consumption, emission, and drivability by selecting a suitable gear stage in a hybrid vehicle with a transmission. SOLUTION: The priority of driving force adjustment control to a request of a vehicle driving force is set in the order of engine power increase, motor output increase, and gear ratio increase. To be more specific, a gear stage with the smallest gear ratio is selected in a range in which engine speed more than a predetermined minimum speed is achieved S12, S14, a requested driving force is attained with an engine power at the selected gear stage S16, the requested driving force is attained with the engine output and the motor output when the requested driving force cannot be attained only with the engine power S18, and gear stage is changed such that the gear ratio increases when the requested driving force cannot be attained with the engine power and the motor output S20. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a technology capable of preventing hybrid system destruction caused by performing rich spike control. SOLUTION: An internal combustion engine control device is provided for a hybrid vehicle having an internal combustion engine capable of lean combustion and comprising an NOx storage reduction catalyst which holds NOx in exhaust gas and reduces held NOx according to an exhaust air-fuel ratio, and a generator which converts a part of energy generated by the internal combustion engine into electric energy. In idling operation of the internal combustion engine where the rotating speed of the internal combustion engine is not controlled by the generator, the execution of rich spike control of temporarily enriching the exhaust air-fuel ratio to reduce NOx held to the NOx storage reduction catalyst is forbidden. Alternatively, in the case of performing rich spike control in the idling operation of the internal combustion engine, throttle opening is reduced before performing rich spike control. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To efficiently operate an internal combustion engine in a hybrid vehicle. SOLUTION: In a hybrid system 10 a torque calculating part 100b calculates torque of an engine 200 from torque reaction of a motor generator MG1. A fuel consumption rate calculating part 100c calculates an instantaneous fuel consumption rate in the engine 200 on the basis of such the calculated engine torque, a fuel injection quantity and an engine speed. An operation line updating part 100d updates an operation line by performing operation line updating processing, and in this case, updates an operation point on the operation line to a fuel consumption rate minimum operation point fixed on an equal output line by performing first operation point learning processing when the temperature of a battery 500 is a predetermined value or more. While, when the temperature of the battery 500 is less than the predetermined value, second operation point learning processing is performed, and the fuel consumption rate is learnt on an equal rotational line. The temperature of the battery 500 is quickly recovered to the predetermined value or more in this process. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To efficiently operate an internal combustion engine control device for a hybrid vehicle. SOLUTION: In a hybrid system 10, a torque calculating part 100b calculates a torque of an engine 200 from a torque reaction of a motor generator MG1. A fuel consumption rate calculating part 100c calculates a momentary fuel consumption rate of the engine 200 based on the calculated engine torque, the fuel injection amount, and the engine speed. An operating line updating part 100d updates the operating line by performing an operating line updating process based on the calculated fuel consumption rate. At this time, a learning range setting part 100f changes the learning range of the fuel consumption rate set in the operating line updating process according to the vehicle speed, noise, or vibration of a hybrid vehicle 20. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To effectively operate an internal combustion engine in a hybrid vehicle even in a range where the efficiency in a hybrid vehicle is locally low. SOLUTION: In a hybrid system 10, a torque calculation part 100b calculates torque of an engine 200 from torque reaction force of a motor generator MG1. A fuel consumption rate calculation part 100c calculates an instantaneous fuel consumption rate in the engine 200 on the basis of a fuel injection amount and engine rotational speed. A working line updating part 100d updates a working line by executing a working point learning process on the basis of the calculated fuel consumption rate. When the engine 200 has the locally low efficiency range on the working line, a working point setting part 100f sets therein as a working point either having higher efficiency of a working point corresponding to required output or two working points switched and controlled to maintain the required output. COPYRIGHT: (C)2006,JPO&NCIPI