Abstract:
PROBLEM TO BE SOLVED: To provide a technique capable of supplying much EGR gas while suppressing the inflow of an unburned fuel into an EGR passage in an exhaust recirculation device of an internal combustion engine. SOLUTION: This exhaust recirculation device comprises a turbocharger 5 having a turbine 5b in the exhaust passage of the internal combustion engine and having a compressor 5a in the intake passage, an exhaust emission control device 12 installed in the exhaust passage 4 on the downstream side of the turbine 5b, a first EGR passage 31 for connecting the exhaust passage 4 on the downstream side of the exhaust emission control device 12 to the intake passage 3 on the upstream side of the compressor 5a, a second EGR passage 41 for connecting the exhaust passage 4 on the downstream side of the exhaust emission control device 12 to the intake passage 3 on the downstream side of the compressor 5a, and an EGR ratio determination means 20 for determining the ratio of the EGR gas supplied from the first EGR passage 31 to the EGR gas supplied from the second EGR passage 41 according to the operating conditions of the internal combustion engine 1. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a technology by which temperature of intake containing EGR gas is set to a proper value in an exhaust gas recirculating device of an internal combustion engine. SOLUTION: An internal combustion engine which is equipped with a turbo charger including a turbine in an exhaust passage and a compressor in an intake passage and with a low pressure EGR passage for connecting the exhaust passage donwstream from the turbine with the intake passage upstream from the compressor, is provided with an EGR gas quantity change means for changing the EGR gas quantity flowing through the low pressure EGR passage so that the temperature of intake in a prescribed position donwstream from a part to which the low pressure EGR passage of the intake passage is connected is set within a target range. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a technique for suppressing the formation of NOx and recirculation of unburnt fuel in an EGR device for an internal combustion engine. SOLUTION: The EGR device for recirculating exhaust gas downstream of an exhaust purifying catalyst to an intake passage comprises: a partition wall partitioning exhaust gas flowing on the center axis side of the exhaust purifying catalyst from exhaust gas flowing on the outer edge side downstream of the exhaust purifying catalyst; and a selecting means for taking in one of the exhaust gas on the center axis side of the partition wall and exhaust gas on the outer edge side. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a lubricating device for a diesel engine performing lubrication by using fuel such as light oil, simple in structure with and reduced in the number of parts. SOLUTION: The lubricating device (1) is provided with an injection system fuel supply path (4) feeding fuel in an oil tank (2) into a cylinder having a cylinder arranged therein. The injection system fuel supply path (4) includes a high pressure supply pump (5) and a common rail (6) having high pressure fuel fed from the high pressure supply pump (5). A first head fuel supply path (8a) is branched from the high pressure supply pump (5), and return fuel from the high pressure supply pump (5) is supplied to an engine head. A second head fuel supply path (8b) is branched from the common rail (6) and return fuel from the common rail (6) is supplied to the engine head. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To drive an electric oil pump at a minimum opportunity before an engine or the like is regularly started and operated and surly supply oil to predetermined parts. SOLUTION: An electric oil pump drive control device comprises an oil-supplied device controlled for automatic stop and start and requiring oil supply, the electric oil pump for supplying oil, a demand output estimation means for estimating driver demand output Pe, and an electric pump drive means for driving and controlling the electric oil pump when estimated Pe exceeds electric oil pump drive demand output Pod which is smaller than engine start demand output Pegsta by a predetermined amount w. It is judged from engine rotation speed whether the engine is in stop (S10, S11), the respective outputs Pe, Pegsta are read in if the engine is in stop (S11 Yes, S12), the electric oil pump is driven when the Pe exceeds the Pod (= Pegsta - w) (S13 Yes, S14), and in other cases, stop of the drive is continued (S15). COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To efficiently perform the NOx reduction of a storage/reduction type NOx catalyst by a simple structure. SOLUTION: In this exhaust emission control device of a hybrid vehicle having the storage/reduction type NOx catalyst in an exhaust passage and allowed to drive by either one of an engine and a motor, when NOx is releasably reduced from the storage/reduction type NOx catalyst while an EV is running by the motor (YES in step S100, YES in step S110), a throttle valve is roughly fully closed to restrict intake air (step S120), and the engine is rotated at a low speed following the process of the restriction to inject a fuel from a cylinder injection fuel injection valve into a cylinder (step S130) without performing ignition. A rich mixture cracked in a compression stroke is fed to the storage/reduction type NOx catalyst to efficiently perform the NOx reduction at a low space velocity SV. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide an internal combustion engine capable of sufficiently cooling a piston by allowing oil in a cooling channel to efficiently flow. SOLUTION: This internal combustion engine includes the piston provided with: the cooling channel 30 formed in the piston 10; and an oil introduction hole 32 communicating with the cooling channel 30 for receiving oil injected from oil jet. In the internal combustion engine, oil discharge holes 34 for making a circumferential part of the piston 10 communicate with the cooling channel 30 are formed; and vertical grooves 36 are formed in a peripheral part of the piston below the oil discharge holes 34. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a cooling device of a hybrid drive unit mountable to a limited installation space. SOLUTION: This cooling device 110 of a hybrid drive unit includes a radiator 51 for electric appliances for dissipating heats of cooling water cooling electric appliances 8, a water pump 54 for electric appliances for circulating the cooling water for cooling the electric appliances 8 between the electric appliances 8 and the radiator 51 for the electric appliances, and a fan 52 blowing air to the radiator 51 for the radiator 51 for the electric appliances. The water pump for the electric appliances and the fan 52 are driven by the same motor 53. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To realize enhancement of an exhaust gas cleaning efficiency by enhancing reduction efficiency of an NOx catalyst occuluded by preventing flowing out of uncleand NOx and a reducing agent in the exhaust gas cleaning device in a hybrid vehicle. SOLUTION: The exhaust gas cleaning device 50 comprising a first catalyst 51 and a second catalyst 52 reducible by occuluding NOx in the exhaust gas is provided in an exhaust pipe 46 and a fuel addition valve 57 for feeding the fuel as the reducing agent to the respective catalysts 51, 52 is provided. An electric assist turbo-supercharger is driven at EV traveling by MG12 and MG13 that DE 11 is stopped and a predetermined amount of fuel is injected from the fuel addition valve 57 to an exhaust port 33, thereby, the fuel as the reducing agent is fed to the exhaust gas cleaning device 50. At this time, the fuel is reciprocated in the first catalyst 51 and the second catalyst 52 by repeating normal rotation driving and reverse rotation driving of the electric assist turbo-supercharger. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide an exhaust emission control system for an internal combustion engine, comprising particulate filters in exhaust passages for trapping PMs, wherein the trapped PMs are efficiently oxidized and removed. SOLUTION: The exhaust emission control system for the internal combustion engine comprises the first and second particulate filters 17, 18 provided in the exhaust passages 11, 12 of the internal combustion engine 1 for trapping particulate materials in exhaust gas. The exhaust flow-out face of the first particulate filter 17 and the exhaust flow-out face of the second particulate filter 18 are joined to each other in the opposed condition via a connection passage 19 so that exhaust gas flows from the connection passage to an exhaust passage 13 on the downstream side. COPYRIGHT: (C)2006,JPO&NCIPI