Abstract:
PROBLEM TO BE SOLVED: To supply intake air to a cylinder in an amount corresponding to required acceleration when accelerating a vehicle for example. SOLUTION: This control device 100 controls the opening/closing operation of an ABV 301 to generate required torque in an engine 200. Thus, intake air is supplied to the cylinder 201 in amount corresponding to the required torque. Even when the vehicle is suddenly accelerated from a low-air-amount condition such that the vehicle is suddenly accelerated from an idling condition, torque is generated in the engine 200 in good response to the pedalling of an accelerator 226. Thus, the accelerating responsiveness of the vehicle is improved and the ride comfort of the vehicle that a driver feels is improved. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To control the intake air amount in an intake control device for an internal combustion engine by taking advantage of characteristics of both a throttle and an intake valve. SOLUTION: When there is a change demand in the intake air amount, the intake air amount is controlled by the throttle until a predetermined condition regarding pressure inside an intake pipe is satisfied. When the condition is satisfied, the intake air amount is controlled by change in the operating characteristic of the intake valve. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a control device of an internal combustion engine improving stability of an air-fuel ratio control in the internal combustion engine having ignition delay in acceleration or speed change. SOLUTION: When operation state is changed to a high load side, or when acceleration is demanded, a normal OT increment efotpb is permitted at the time when a temperature estimate tempsm of exhaust system parts exceeds a threshold for the normal OT increment, and a delay increment efrtd is permitted at the time when the temperature estimate tempsm of the exhaust system parts exceeds a threshold for the delay increment. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a heater control device for an exhaust gas sensor capable of securely preventing the exhaust gas sensor installed in an engine exhaust system from being mechanically damaged and capable of activating the exhaust gas sensor relatively earlier without requiring complicated sequential calculations. SOLUTION: This heater control device for the exhaust gas sensor which, when an engine cooling water temperature reaches a set temperature, starts to operate a heater for heating the exhaust gas sensor disposed in the engine exhaust system, comprises a set temperature change means which, when an outside air temperature in starting the engine is lower than an outside air temperature threshold, changes the set temperature to a higher one (step 204) and when a temperature difference between an engine cooling water temperature in starting the engine and the outside air temperature is larger than a temperature difference threshold, changes a set temperature to a higher one. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide an exhaust emission control device for an internal combustion engine capable of more surely purifying exhaust gas by reducing chances that catalyst is inactive although temperature of catalyst reaches active temperature. SOLUTION: This device is provided with a plurality of catalysts 3, 4 provided in series in an exhaust gas passage 2 of the internal combustion engine 1, a determination means determining whether rear stage catalysts 4 which are catalysts of the plurality of the catalysts except catalyst 3 positioned in a uppermost stream of the exhaust gas passage are under active state or inactive state, and an increase quantity means 5 increasing quantity of material activating the rear stage catalyst 4 in exhaust gas flowing in the rear stage catalyst as compared with a case that the determination means determines that the catalysts are under active state when the determination means determines that the rear stage catalysts are under inactive state. The rear stage catalysts can be recovered from the inactive state to the active state for the increase quantity means 5 to increase quantity of the material activating the rear stage catalysts 4. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a catalyst warming-up system of an internal combustion engine, in which even when atmospheric pressure surrounding the internal combustion engine is reduced, an exhaust-emission catalyst is properly warmed up to suppress discharge of exhaust gas to the outside without being properly purified by the catalyst. SOLUTION: In the exhaust-emission control system of an internal combustion engine having an exhaust-emission control catalyst in a discharge gas passage, an intake-air flow controller for determining an intake-air flow to the engine on the basis of operation condition of the engine, an atmospheric pressure detector for detecting atmospheric pressure, and an intake-air flow correction means (S103-S106) are provided. In warming-up time of the catalyst, the intake-air flow correction means increase an intake-air flow determined by the intake-air controller in correspondence with decrease in the atmospheric pressure detected by the atmospheric-pressure detector. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a fuel injection device capable of appropriately supplying fuel by preventing dripping of a large drop. SOLUTION: This fuel injection device is built in an internal combustion engine and injects fuel, and is provided with a pointed part 10 getting thin downward in a lower end position of a fuel injection part 2 for injection. Consequently, even if fuel adhering on a wall surface of a fuel injection part 2 concentrates on a lower end of the pointed part 10, liquid drop can be dripped without becoming a large drop. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a novel abnormality diagnostic apparatus for a cooling system, capable of diagnosing whether the cooling system is tampered with.SOLUTION: A temperature sensor 18 is mounted to a core including a tube 22 formed with closed portions 30 and 32. A temperature sensor 16 is mounted to a core including a tube 22 without a closed portion. A temperature measured by the temperature sensor 16 sharply rises after a thermostat valve is opened (Time t), and then approaches an engine water temperature, and finally converges to a specific temperature T(Time t). A temperature measured by the temperature sensor 18 rises more slowly than the temperature measured by the temperature sensor 16, and finally converges to a specific temperature T(
Abstract:
PROBLEM TO BE SOLVED: To provide a new abnormality determination system of an ozone reducing function which can determine the presence or absence of tampering of a vehicle component regardless of the driving state of a vehicle.SOLUTION: As shown in Figure 3, in every test radiator, the rate of pressure change rises with increase in coating amount. The pressure change is caused by the narrowing of a distance between adjacent louver fins due to the coating of the core of a test radiator with an ozone reducing material. The rate of pressure change becomes higher as the coating amount is increased because the distance between the louver fins becomes narrower as the coating amount is increased, making it more difficult for atmospheric air to pass therethrough. Thus, based on the relationship of Figure 3, a characteristic in the rate of pressure change (reference characteristic) is previously determined according to coating amounts and catalyst specifications. The reference characteristic is compared with a characteristic (measured characteristic) in the rate of pressure change measured during the driving of a vehicle 10, thereby determining the presence or absence of tampering.
Abstract:
PROBLEM TO BE SOLVED: To prevent the occurrence of thermal strain and heat storage by a temperature difference between the upstream side and the downstream side by sufficiently exhibiting an exhaust gas cooling function in an exhaust gas cooling adapter of an internal combustion engine.SOLUTION: There is no difference between an upstream-side total heat receiving quantity (Qfh+Qgh) and a downstream-side total heat receiving quantity (Qfe+Qge) of the exhaust gas cooling adapter 4 by a difference in heat conductivity between respective heat insulation materials 10 and 12. Thus, the exhaust gas cooling function by an exhaust passage 14 can be sufficiently exhibited, and since a temperature is equalized between the upstream side and the downstream side, the occurrence of thermal strain and the heat storage of the exhaust gas cooling adapter 4 can be surely prevented. The fastening of bolts B1 and B2 is performed on the recessed space peripheral edge of a connecting surface. Thus, the exhaust gas cooling adapter 4 is fastened to a cylinder head Hd with a bolt for applying the internal combustion engine exhaust gas cooling system 2, and even if an exhaust manifold Ex is fastened with a bolt, a fastening stress concentration to the heat insulation materials 10 and 12 can be prevented, and the deterioration of heat insulation performance caused by the deformation of the heat insulation materials 10 and 12 can be prevented.