Abstract:
PROBLEM TO BE SOLVED: To provide a control device for an internal combustion engine capable of accomplishing a stable stratified combustion at a low cost without requiring any complicated constitution.SOLUTION: The control device is used for the internal combustion engine which is configured so that two suction ports are provided in parallel for one combustion chamber and a tumble flow is formed in a cylinder with the air introduced from the two suction ports, and is equipped with a central ignition plug and port injection valves installed at the suction ports so as to inject the fuel into the suction ports. Air is sucked into the cylinder from the two suction ports, while the fuel is injected from one of the port injection valves, and the mixture gas of the air and injected fuel is sucked into the cylinder from one of the suction ports, and from the other suction port, the air is sucked in; in this stratified combustion mode, the fuel injection timing of the one port injection valve is controlled so that the mixture gas around the central ignition plug will have a fuel density for making stratified combustion at the prescribed ignition timing.
Abstract:
PROBLEM TO BE SOLVED: To provide an internal combustion engine capable of preventing intrusion of fuel components into an EGR layer. SOLUTION: This internal combustion engine 1 includes: an intake valve 13A for opening/closing an intake port 12A relative to a combustion chamber 8; a fuel injection valve 16 capable of injecting fuel to the intake air; an EGR passage 17 connecting an exhaust passage 6 and the intake port 12A to each other; and an EGR valve 18 for opening/closing the EGR passage 17. Valve opening operation of the EGR valve 18 is controlled to lead EGR gas into the intake port 12A before opening the intake valve 13A, and after the EGR gas is led into the combustion chamber 8 from the intake port 12A with the operation for opening the intake valve 13A, and operation of the fuel injection valve 16 relative to the intake air is controlled so that an air layer L2 is left between an EGR layer L1 and an air-fuel mixture layer L3 inside the combustion chamber 8. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a fuel supply device of an internal combustion engine capable of controlling a dissolution rate of fuel and air under high pressure, without separately arranging a gas compression device. SOLUTION: This fuel supply device includes a low pressure fuel pump for delivering fuel to a low pressure pipe 3 by pressurizing the fuel, a high pressure fuel pump 2 having a pump room 6 respectively connected to the low pressure pipe 3 and an air passage 9 and sending out the fuel to a high pressure pipe 4 by taking in and compressing the fuel to the pump room 6 from the low pressure pipe 3 by reciprocating operation of a plunger 7, a fuel solenoid valve 8 for opening-closing a part between the low pressure pipe 3 and the pump room 6, and an air solenoid valve 10 for opening-closing a part between an air pipe 9 and the pump room 6. A rate of the fuel and the air in the pump room 6 is controlled by driving the respective fuel solenoid valve 8 and air solenoid valve 10 for opening and closing. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To form a layer of recirculated exhaust gas equivalent to a layer of recirculated exhaust gas of a direct injection engine in a dual injection system engine. SOLUTION: An engine control means (100, 200) control the dual injection system engine provided with a first and a second intake port (14a, 14b) which are mutually independent. The first intake port is constructed to make fluid through the first intake port form a first layer (191) near a spark plug (17), and the second intake port is constructed to make fluid through the second intake port form a second layer (192) around the first layer. The engine control means is provided with a control means (20) controlling a first injector (16a) to supply fuel in an EGR stratified operation zone, and controlling a second injector (16B) so as not to supply fuel while controlling an EGR valve (151) to lead recirculated exhaust gas to the second intake port. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To avoid inhibition of growth of flame at smoking of a spark plug for an internal-combustion engine. SOLUTION: The spark plug (1) is provided with a center electrode (12) protruding in one direction at the tip, a grounding electrode (13) opposed to the center electrode with an interval at a tip side, and an insulator (14), with a jutted part (14a) at least partially covering an outer periphery face at a root side of the center electrode and protruding, in a direction along that one direction at a site separated with an interval from the center electrode. As creeping discharge takes place at smoking between the center electrode and the grounding electrode via the jutted part, it can prevent the flame generated from being robbed of its heat by surrounding members, inhibited from growing, or going out. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To inhibit variation of air current among cylinders in a cylinder direct injection spark ignition type internal combustion engine. SOLUTION: A direct injection injector 19 injecting fuel in a direction intensifying tumble is provided in a cylinder. Voltage between center electrodes of a spark plug 20 is monitored in each cylinder and a condition of tumble formed in each cylinder is detected from discharge time thereof. The variation of tumble among cylinders is detected from a condition of tumble of each cylinder. The assist quantity of tumble is adjusted for each cylinder and the variation of tumble among cylinders is corrected by adjusting the quantity of fuel injected from the direct injection injector 19 of each cylinder. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To suppress deviation of an air-fuel ratio caused by oil contained in fuel. SOLUTION: This internal combustion engine 1 is equipped with a positive crankcase ventilation system 117 for leading gas inside a crankcase 102 to an intake passage 114, at least one piston ring groove formed in a piston side circumferential part and into which a piston ring is fitted, and an oil tank 25 for isolating the oil introduced from a first oil passage inlet opened in the piston ring groove from an oil pan 116 and storing it. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an ignition control device capable of suppressing output fluctuation between cycles in operating an engine under lean conditions. SOLUTION: The ignition control device 1 comprises an ignition plug 11 to which voltage is applied in the combustion stroke of the engine; an ignition coil 15 applying high voltage to the ignition plug to generate discharge sparks; an ammeter 18 measuring an ignition current value in the electric discharge of the ignition plug 11; and an ECU 30 performing intermittent control of electric discharge of the ignition plug 11 according to the ignition current value. The ECU 30 acquires the flow of discharge sparks based on information acquired from the ammeter 18 and interrupts electric discharge when observing the flow of electric discharge sparks. Ignition by electric discharge sparks not flowing in each combustion stroke can thereby be achieved to suppress output fluctuation between the cycles. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To inhibit torque variation during phase difference ignition in a lean combustion area in an internal combustion engine provided with a plurality of ignition plugs. SOLUTION: This internal combustion engine 1 is provided with a center plug 7 1 and a side plug 7 2 in a single combustion chamber 1b. The center plug 7 1 is arranged at least one on a center part 1c of the combustion chamber 1b. Also, the side plug 7 2 is arranged at least one on a bore 1t side of the combustion chamber 1b. The center plug 7 1 and the side plug 7 2 are used in phase difference ignition in lean combustion area. Phase difference at that time is difference between MBT of the side plug 7 2 and MBT of the center plug 7 1 . COPYRIGHT: (C)2007,JPO&INPIT