Abstract:
PROBLEM TO BE SOLVED: To provide a display system for processing management that displays management data of multiple NC machine tools with different functions on the same screen while allowing the NC machine tool with a DNC function and the NC machine tool without a DNC function to coexist on a processing line, and provide a display method therefor.SOLUTION: Management data of NC machine tools transmitted to a controller 10 are transmitted to first determination means 13, and the first determination means 13 determines whether or not each NC machine tool has a DNC function, based on the management data. Display means 20 displays the determination result for example by describing a running condition of the display means 20 in a row or displaying a screen background in a different color to distinguish between the NC machine tool with the DNC function and the NC machine tool without the DNC function.
Abstract:
PROBLEM TO BE SOLVED: To obtain a high compression ratio by sufficiently raising compression-end pressure in transition drive at a low load, and to improve exhaust emission.SOLUTION: An engine 10 includes a supercharger 32, a VVT 38 which variably sets a phase of an intake valve 28, and a variable valve mechanism 40 which variably sets an operation angle and a lift amount of the intake valve 28. An ECU 50 calculates a valve-closing time of the intake valve 28 at which the compression-end pressure in a cylinder becomes maximum as the most suitable valve-closing time on the basis of at least the number of revolutions the engine and the operation angle and the valve-closing time of the intake valve 28, and then performs control so that an actual valve-closing time becomes the most suitable valve-closing time at the transition operation by using the VVT 38 at the low load. By this arrangement, the compression-end pressure and the effective compression ratio can be raised as much as possible without reducing the operation angle and the lift amount of the intake valve 28, and THC in exhaust gas can effectively be reduced.
Abstract:
PROBLEM TO BE SOLVED: To enhance a scavenging effect in a control system for an internal combustion engine, scavenging burnt gas in a cylinder by using a mechanism changing the phase of an exhaust valve and a mechanism changing the operating angle of the exhaust valve. SOLUTION: The control system for the internal combustion engine performs scavenging control for increasing the burnt gas scavenged from the inside of the cylinder to an exhaust system during a valve overlapping period using the variable operating angle mechanism changing the operating angle of the exhaust valve and the variable phase mechanism changing the phase of the exhaust valve. In the control system, the operating angle of the exhaust valve is firstly changed when the scavenging control is started, and then the phase of the exhaust valve is changed. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To increase the amount of internal EGR gas scavenged as much as possible, in a valve system for an internal combustion engine scavenging internal EGR gas during a valve overlap period. SOLUTION: In this valve system for the internal combustion engine scavenging the internal EGR gas during the valve overlap period by changing the working angle of an exhaust valve, a lift change rate when the exhaust valve is opened is reduced, thereby increasing an exhaust pulsation cycle. In this case, since a period when exhaust pressure exceeds intake pressure during the valve overlap period is reduced or eliminated, the amount of internal EGR gas scavenged is increased. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an exhaust gas recirculation device capable of efficiently functioning an internal combustion engine even when only a low-pressure EGR (Exhaust Gas Recirculation) device is operated. SOLUTION: This exhaust gas recirculation device for an internal combustion engine 10 including a turbocharger 14 is provided with the low-pressure EGR device 20, a high-pressure EGR device 25, and an exhaust gas cutout valve 29 which turns on/off the inflow of the exhaust gas into the high-pressure EGR device 25 (a high-pressure EGR device passage 26) and which is closed when the high-pressure EGR device 25 is stopped to operate. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a control device for an engine capable of executing a post injection for inhibiting formation of smoke without steeply reducing torque when post injection fuel is burned. SOLUTION: An ECU 1 includes an EGR rate control means keeping an EGR rate not greater than a prescribed value by controlling an EGR valve 43 and a post injection control means executing post injection at a timing in a range in which injected fuel can be burned and not earlier than timing at which smoke formation quantity does not exceeds a prescribed value at an EGR rate not greater than a prescribed value, in an engine 50 including a NOx storage reduction type catalyst 22 in an exhaust system 20, an EGR passage 41 re-circulating exhaust gas to an intake system 10 from the exhaust system 20, and an EGR valve 43 changing opening of the EGR passage 41. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To switch to a recirculating flow of exhaust gas of using a low pressure EGR device from a recirculating flow of exhaust gas of using a high pressure EGR device, by properly restraining an extreme change in supercharging pressure. SOLUTION: This control device of an internal combustion engine controls a system having a high pressure turbocharger, a low pressure turbocharger, the high pressure EGR device and the low pressure EGR device. Actually, a control means controls a speed for increasing the ratio occupied by an EGR gas quantity recirculated by the low pressure RGR device to the whole EGR gas quantity recirculated to an intake system, by controlling so that a change speed of the supercharging pressure becomes a predetermined value or less by making a feedback process, when switching to the recirculating flow of the EGR gas of using the low pressure EGR device from the recirculating flow of the EGR gas of using the high pressure EGR device. Thus, the extreme change in the supercharging pressure apt to be caused in switching can be properly restrained. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To perform valve control capable of improving fuel efficiency while suppressing an increase in a THC discharge amount at low loading, in a control device of an internal combustion engine. SOLUTION: This control device is equipped with a discharge variable valve mechanism 58 which make variable a valve opening characteristic of an exhaust valve 54. As cooling water temperature of the internal combustion engine 10 becomes lower, an advancing quantity at an opening time with respect to the opening time of the exhaust valve 54 in the warm-up completion state of the internal combustion engine 10 is increased. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a technique for more efficiently reducing NOx stored in an NOx catalyst in an exhaust emission control system for an internal combustion engine. SOLUTION: In reducing NOx stored in the NOx catalyst, when a temperature of the NOx catalyst is lower than a prescribed temperature, the air-fuel ratio of an atmosphere around the NOx catalyst is lowered by only lowering the air-fuel ratio of exhaust emitted from the internal combustion engine. In the case that the temperature of the NOx catalyst is the prescribed temperature or higher, the air-fuel ratio of the atmosphere around the NOx catalyst is lowered by only adding a reducer by a reducer adding means, or both by lowering the air-fuel ratio of exhaust emitted from the internal combustion engine, and by adding the reducer by the reducer adding means. COPYRIGHT: (C)2009,JPO&INPIT