Abstract: An exhaust purification system is equipped with: a linear exhaust pipe through which exhaust gas emitted from an engine passes; an injection nozzle that injects a reducing agent into the exhaust pipe at an oblique angle with respect to the axial direction of the pipe; a reduction catalyst that is provided in the exhaust system downstream from the injection nozzle, and that purifies the exhaust gas by causing the exhaust gas to react with the reducing agent; and a mixer member that is provided inside the exhaust pipe 13, downstream from the injection nozzle, and that causes the reducing agent to mix with the exhaust gas and diffuse. The mixer member includes multiple fins protruding downstream, and is arranged inclined inside the exhaust pipe such that the upstream surface thereof faces the injection opening surface of the injection nozzle.

Abstract: An exhaust purification system is equipped with: a linear exhaust pipe through which exhaust gas emitted from an engine passes; an injection nozzle that injects a reducing agent into the exhaust pipe at an oblique angle with respect to the axial direction of the pipe; a reduction catalyst that is provided in the exhaust system downstream from the injection nozzle, and that purifies the exhaust gas by causing the exhaust gas to react with the reducing agent; and a mixer member that is provided inside the exhaust pipe 13, downstream from the injection nozzle, and that causes the reducing agent to mix with the exhaust gas and diffuse. The mixer member includes multiple fins protruding downstream, and is arranged inclined inside the exhaust pipe such that the upstream surface thereof faces the injection opening surface of the injection nozzle.

Abstract: An exhaust emission control system including a continuous regenerating diesel particulate filter (“DPF”) and a DPF controller, wherein a forced regenerator is operated by a driver's request, when it is judged that a traveling distance, after starting particulate matter collection, detected by a traveling distance detector has reached a predetermined judging traveling distance, even when the DPF controller detects that a collection amount detected by a collection amount detector is smaller than a prescribed judging collection amount. Accordingly, in a continuous regenerating DPF capable of manual regenerating, the number of warnings, such as a blinking regeneration button prompting a manual regeneration, is reduced to relieve a driver of annoyance or inconvenience.

Abstract: The degree of a deterioration in catalyst is determined when the following requirements are satisfied: the operating state of an internal combustion engine (E) is in a predetermined operating state; and the temperature (T1m) of an exhaust gas, which flows into a catalyst (12), is in a second temperature range (?T80) in which the upper limit of the second temperature range (?T80) is 10% below the upper limit of a first temperature range (?T100) between the activation start temperature (Ta) and the activation end temperature (Tb) of the catalyst (12) before a deterioration and the lower limit of the second temperature range (?T80) is 10% above the lower limit of the first temperature range (?T100).

Abstract: An exhaust gas control system (1) comprised with a continuous regeneration-type DPF (13), an exhaust throttle valve (16) and a DPF control means (30C), wherein the regeneration control is suspended, the multi injection control is performed, and the exhaust throttle valve is closed, when detecting a-stop condition of the vehicle during the regeneration control of the continuous regeneration-type diesel particulate filter device (13) by the regeneration means. Thereby, concerning the regeneration of the continuous regeneration-type DPF device (13), the DPF can be regenerated securely by burning PM efficiently even in a traveling pattern of frequent waiting for the traffic lights to change in urban areas.

Abstract: The degree of a deterioration in catalyst is determined when the following requirements are satisfied: the operating state of an internal combustion engine (E) is in a predetermined operating state; and the temperature (T1m) of an exhaust gas, which flows into a catalyst (12), is in a second temperature range (?T80) in which the upper limit of the second temperature range (?T80) is 10% below the upper limit of a first temperature range (?T100) between the activation start temperature (Ta) and the activation end temperature (Tb) of the catalyst (12) before a deterioration and the lower limit of the second temperature range (?T80) is 10% above the lower limit of the first temperature range (?T100).

Abstract: An exhaust emission control system [1] comprising a continuous regenerating DPF [13] and a DPF controlling means [30C], wherein control is so performed as to accept the operation of a forced regenerating means [34C] at an operation request by a driver when it is judged a traveling distance [?Mc] after starting collection detected by a traveling distance detecting means [33C] has reached a specified judging traveling distance [?M1] even when the DPF controlling means [30C] detects a collection amount [?Pm] detected by a collection amount detecting means [32C] is smaller than a specified judging collection amount [?P1]. Accordingly, in a continuous regenerating DPF [13] capable of manual regenerating, the number of warning such as a blinking regeneration button prompting a manual regeneration is reduced to relieve a driver of trouble.

Abstract: An internal combustion engine exhaust gas purifying system (10) having a continuous regenerating diesel particulate filter system (3) on the exhaust passage (2) of an internal combustion engine (1) is constituted by including collected-quantity estimation means (5A) for estimating the quantity of collected particulate matter in a filter (3b) of the filter system for collecting the particulate matter and maximum-fuel-injection-quantity restricting means (5C) for restricting the maximum fuel injection quantity of the internal combustion engine (1) when the quantity of collected particulate matter estimated by the collected-quantity estimation means (51A) is equal to or more than a predetermined judgment value.

Abstract: To provide an exhaust gas purifying method for purifying the exhaust gas of an internal combustion engine (1) by an exhaust gas purifying system (10) having an oxidation catalyst (3a), which comprises the steps of estimating the quantity of unburnt hydrocarbon accumulated in a support of the oxidation catalyst (3a), performing a hydrocarbon removal control when an estimated accumulation quantity (Vhc) of the unburnt hydrocarbon exceeds a predetermined judgment value (Vhc0) and raising an exhaust gas temperature (T) to activate the oxidation catalyst (3a) and oxidizing and removing the accumulated unburnt hydrocarbon. Thereby, it is possible to prevent a white fume from being produced after a low exhaust temperature state of an idling operation or the like continues for a long time.

Abstract: A regeneration control method for regenerating a continuously regenerating diesel particulate filter device capable of regenerating a filter by efficiently removing PM while suppressing the deterioration of fuel consumption and preventing a drivability from being deteriorated, wherein the clogged-state of the filter is judged in three or more phases of the clogged-state and, when the clogged-state of the filter reaches a specified phase, a specified regenerating mode operation set in correspondence with the reached phase is performed.

Abstract: A regeneration control method for regenerating a continuously regenerating diesel particulate filter device capable of regenerating a filter by efficiently removing PM while suppressing the deterioration of fuel consumption and preventing a drivability from being deteriorated, wherein the clogged-state of the filter is judged in three or more phases of the clogged-state and, when the clogged-state of the filter reaches a specified phase, a specified regenerating mode operation set in correspondence with the reached phase is performed.

Abstract: A regeneration control method for regenerating a continuously regenerating diesel particulate filter device capable of regenerating a filter by efficiently removing PM while suppressing the deterioration of fuel consumption and preventing a drivability from being deteriorated, wherein the clogged-state of the filter is judged in three or more phases of the clogged-state and, when the clogged-state of the filter reaches a specified phase, a specified regenerating mode operation set in correspondence with the reached phase is performed.

Abstract: An exhaust gas control system (1) comprised with a continuous regeneration-type DPF (13), an exhaust throttle valve (16) and a DPF control means (30C), wherein the regeneration control is suspended, the multi injection control is performed, and the exhaust throttle valve is closed, when detecting a stop condition of the vehicle during the regeneration control of the continuous regeneration-type diesel particulate filter device (13) by the regeneration means. Thereby, concerning the regeneration of the continuous regeneration-type DPF device (13), the DPF can be regenerated securely by burning PM efficiently even in a traveling pattern of frequent waiting for the traffic lights to change in urban areas.

Abstract: The present invention concerns an diesel engine fuel injection control, and a regeneration control method of exhaust gas post-treatment apparatus using this fuel injection control, and the engine fuel injection control for performing after injections (Fas, Fam) after a main injection (Fm) for activation and regeneration of the exhaust gas post-treatment apparatus, through the rising of diesel engine exhaust gas temperature or the decrease of the oxygen concentration in the exhaust gas, is composed to perform the after injections (Fas, Fam) in a range of 40° ATDC to 90° ATDC of the crank angle. Whereby, the main injection can be burned, without misfire, even when the main injection is largely retarded, or, the injection quantity is increased/decreased, and the engine operation can be sustained, by keeping the engine combustion in a good state.

Abstract: An exhaust gas purification system includes the DPF to purify particulate matters in the exhaust gas of a diesel engine, comprising a regeneration control device to judge a condition of an engine operation to be an idle operation or not at the time of starting the control operation for regenerating the diesel particulate filter and during the regeneration control operation, when the engine operation is judged to be an idle operation, an idle engine speed is controlled and raised to the predetermined engine speed. Since the system includes such structure, in an operation of the DPF regenerate control, an adequate exhaust gas flow rate can be kept even in an idle operation and a raise of the DPF temperature due to a reduction of the exhaust gas flow rate can be avoided so as to prevent a damage of the DPF from melting and a deterioration of the catalyst.

Abstract: To provide an exhaust gas purifying method for purifying the exhaust gas of an internal combustion engine (1) by an exhaust gas purifying system (10) having an oxidation catalyst (3a), which comprises the steps of estimating the quantity of unburnt hydrocarbon accumulated in a support of the oxidation catalyst (3a), performing a hydrocarbon removal control when an estimated accumulation quantity (Vhc) of the unburnt hydrocarbon exceeds a predetermined judgment value (Vhc0) and raising an exhaust gas temperature (T) to activate the oxidation catalyst (3a) and oxidizing and removing the accumulated unburnt hydrocarbon.

Abstract: An internal combustion engine exhaust gas purifying system (10) having a continuous regenerating diesel particulate filter system (3) on the exhaust passage (2) of an internal combustion engine (1) is constituted by including collected-quantity estimation means (5A) for estimating the quantity of collected particulate matter in a filter (3b) of the filter system for collecting the particulate matter and maximum-fuel-injection-quantity restricting means (5C) for restricting the maximum fuel injection quantity of the internal combustion engine (1) when the quantity of collected particulate matter estimated by the collected-quantity estimation means (51A) is equal to or more than a predetermined judgment value.

Abstract: A regeneration control method for regenerating a continuously regenerating diesel particulate filter device (1) capable of regenerating a filter (4) by efficiently removing PM while suppressing the deterioration of fuel consumption and preventing a drivability from being deteriorated, wherein the clogged-state of the filter (4) is judged in three or more phases of the clogged-state and, when the clogged-state of the filter (4) reaches a specified phase, a specified regenerating mode operation set in correspondence with the reached phase is performed.

Abstract: A diesel particulate filer unit 1 comprising a filter 4 for capturing particulates in the exhaust gas G of an engine E, and a regeneration control means 50 judging the start of the regeneration operation of said filter 4, according to the comparison between the value measured by exhaust pressure sensors 51, 52 and a predetermined exhaust pressure judgment value &Dgr;Pes, Pes, Res wherein said regeneration control means 50 is configured to estimate the ash accumulated quantity SAsh of ash leaked into the exhaust gas G and accumulated in said filer 4, and correct said exhaust pressure judgment value &Dgr;Pes, Pes, Res for judging the regeneration operation start based on this. Thereby, a diesel particulate filter that can judge the regeneration start timing appropriately, taking accumulation and deposit of ash generated from lubricant oil on the filter into consideration, and remove particulates efficiently all the way preventing the filter from clogging is provided.

Abstract: The present invention concerns an diesel engine fuel injection control, and a regeneration control method of exhaust gas post-treatment apparatus using this fuel injection control, and the engine fuel injection control for performing after injections (Fas, Fam) after a main injection (Fm) for activation and regeneration of the exhaust gas post-treatment apparatus, through the rising of diesel engine exhaust gas temperature or the decrease of the oxygen concentration in the exhaust gas, is composed to perform the after injections (Fas, Fam) in a range of 40° ATDC to 90° ATDC of the crank angle.