| Patent application number | Description | Published |
|---|
| 20150083095 | INTERNAL COMBUSTION ENGINE AND CONTROL METHOD THEREFOR - An internal combustion engine includes an Exhaust Gas Recirculation (EGR) system having an EGR valve and a reed valve in an EGR passage, and a control device that expresses a relationship between an opening degree of the EGR valve and a mass flow rate of an EGR gas by using a first volume flow rate of the EGR gas that can be expressed by using an isentropic flow equation of a nozzle of the EGR valve and a second volume flow rate of the EGR gas pumped out by the reed valve. Even if the reed valve (check valve) is provided in the EGR passage, the mass flow rate of the EGR gas can be calculated accurately. | 03-26-2015 |
| 20160040571 | EXHAUST PURIFICATION DEVICE FOR INTERNAL COMBUSTION ENGINE - An exhaust gas purification device includes a diesel particulate filter (DPF) that traps particulate matter (PM), an exhaust gas temperature sensor that detects temperature of an exhaust gas, an electrostatic capacity detection unit that detects an electrostatic capacity of the DPF, an accumulated-amount estimation unit that estimates an amount of PM accumulated in the DPF on the basis of the electrostatic capacity, and a filter regeneration unit that can perform forced regeneration. On the basis of an accumulated-amount threshold that is lower than an upper PM accumulation limit, and a temperature threshold at which the accumulated PM can still be burned and removed even if an amount of fuel supply is reduced, the filter regeneration unit performs the forced regeneration if the amount of accumulated PM has reached the accumulated-amount threshold and the exhaust gas temperature reaches the temperature threshold. | 02-11-2016 |
| 20160040572 | EXHAUST PURIFICATION DEVICE FOR INTERNAL COMBUSTION ENGINE - An exhaust gas purification device includes a diesel particulate filter (DPF) for capturing particulate matter (PM) in an exhaust gas, a selective catalytic reduction (SCR) device for reducing NOx in the exhaust gas, detecting units for detecting the DPF electrostatic capacity, an estimating unit for estimating the inside temperature of the DPF based on the electrostatic capacity, and a controlling unit for executing forced DPF regeneration. A lower limit temperature is defined as a temperature to trigger PM combustion, and an upper limit temperature is defined as a temperature to avoid filter erosion. The controlling unit executes the forced regeneration with an amount of fuel supplied for causing the inside temperature to reach the lower limit temperature, when the inside temperature is at or above the SCR activation temperature, and executes the forced regeneration with another amount of fuel supplied for causing the inside temperature to reach the upper limit temperature, when the inside temperature is below the SCR activation temperature. | 02-11-2016 |
| 20160040573 | EXHAUST PURIFICATION DEVICE FOR INTERNAL COMBUSTION ENGINE - An exhaust gas purification device for an internal combustion engine, wherein an amount of fuel supply during a forced regeneration is optimized, and a fuel efficiency is effectively improved. The device includes a filter in an exhaust passage of the internal combustion engine for collecting particulate matter in an exhaust gas, an electrostatic capacity detecting unit that detects an electrostatic capacity of the filter, and a filter regenerating unit that supplies fuel to the filter and executes a forced regeneration to burn and remove the particulate matter in the filter. The filter regenerating unit stops supplying fuel when a rate of decrease in the detected electrostatic capacity per predetermined period of time reaches or falls below a predetermined lower threshold, which indicates a drop in burning efficiency of the particulate matter, while the forced regeneration is being executed. | 02-11-2016 |
| 20160047731 | PARTICULATE MATTER MEASUREMENT DEVICE - A particulate matter measuring device includes: a diesel particulate filter (DPF) in which upstream side and downstream side openings of multiple cells partitioned by porous partition walls are alternately plugged; a pair of first electrodes received in a pair of first electrode cells arranged diagonally with a central cell therebetween; a pair of second electrodes received in a pair of second electrode cells arranged diagonally with the central cell therebetween; a first connecting member for connecting the first electrodes to each other; a second connecting member for connecting the second electrodes to each other; and a unit that calculates an amount of particulate matter trapped in the DPF on the basis of capacitance between the electrodes. The four cells which are adjacent to each other around the partition walls of the central cell and sandwiched between the first electrode cells and the second electrode cells are used as measurement cells. | 02-18-2016 |
| 20160047732 | DEVICE FOR MEASURING PARTICULATE SUBSTANCE - A particulate matter (PM) measuring device including a diesel particulate filter (DPF) that has a plurality of cells plugged alternatingly at upstream and downstream sides. The cells are compartmentalized by porous partition walls. At least one of the cells is a measurement cell. The device also includes a pair of electrodes inserted from the non-plugged side in a pair of cells that oppose each other sandwiching the measurement cell. The device also includes a PM accumulation amount calculating unit that calculates an amount of accumulated PM, which is collected in the DPF, on the basis of the capacitance between the electrodes. The electrodes include conductive wire cores that are covered with insulating layers. | 02-18-2016 |
| 20160053654 | EXHAUST PURIFICATION DEVICE FOR INTERNAL COMBUSTION ENGINE - An exhaust gas purification device includes a diesel particulate filter (DPF) that collects particulate matter (PM) from an exhaust gas, a urea water spray unit that sprays urea water into the exhaust gas, a selection catalytic reduction (SCR) device that reduces and purifies NO | 02-25-2016 |
| 20160123207 | EXHAUST PURIFICATION DEVICE - An exhaust gas purification device, including a diesel particulate filter (“DPF”) for collecting particulate matter contained in an exhaust gas, a forced regeneration unit or performing forced regeneration, a capacitance detection unit for detecting a capacitance of the DPF, a total accumulated amount estimation unit for estimating a total amount of accumulated particulate matter and ash collected in the DPF on the basis of the detected capacitance, and an ash accumulated amount calculation unit for calculating an amount of accumulated ash by using, as the amount of accumulated ash, the total amount of accumulation which is estimated when the forced regeneration finishes. | 05-05-2016 |
