IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0717622
(2010-03-04)
|
등록번호 |
US-8281574
(2012-10-09)
|
우선권정보 |
JP-2009-180362 (2009-08-03) |
발명자
/ 주소 |
- Yamada, Shuichi
- Inoue, Katsushi
- Ishii, Yuuki
|
출원인 / 주소 |
|
대리인 / 주소 |
Panitch Schwarze Belisario & Nadel LLP
|
인용정보 |
피인용 횟수 :
3 인용 특허 :
2 |
초록
▼
The present invention has an object to provide an exhaust-gas processing device for a diesel engine, able to inhibit the deterioration of the fuel-consumption and the output reduction. In order to accomplish the above object, the device is provided with a DPF, a means for presuming the amount of PM
The present invention has an object to provide an exhaust-gas processing device for a diesel engine, able to inhibit the deterioration of the fuel-consumption and the output reduction. In order to accomplish the above object, the device is provided with a DPF, a means for presuming the amount of PM to be deposited on the DPF, a DPF-regeneration means, a DPF-regeneration control means, a storing means, a means for sending message to demand an accelerated regeneration, and an operation means for starting the accelerated regeneration. While a normal regeneration processing is being continued (S6) since it has started (S2), the time when a term (T1) for reserving judgment as to the demand for accelerated regeneration has elapsed is taken as the judging time (T3). At this judging time (T3), if the assumed value of the PM deposed amount exceeds a value (J2) for judgment as to the demand for accelerated regeneration, the accelerated regeneration is deemed to be demanded. Then the DPF-regeneration control means allows the means for sending message to demand the accelerated regeneration to start (S8) sending the message to demand the accelerated regeneration.
대표청구항
▼
1. An exhaust-gas processing device for a diesel engine loaded on a machine, the device comprising a DPF (1), a DPF regenerator (3) arranged upstream of an inlet of the DPF and having an outlet configured to pass exhaust gas to the inlet of the DPF, a controller coupled to the DPF regenerator and co
1. An exhaust-gas processing device for a diesel engine loaded on a machine, the device comprising a DPF (1), a DPF regenerator (3) arranged upstream of an inlet of the DPF and having an outlet configured to pass exhaust gas to the inlet of the DPF, a controller coupled to the DPF regenerator and configured to presume an amount of PM deposited on the DPF and to control the DPF regenerator, a memory (5) coupled to the controller, an indicator light (6) mounted to the machine and coupled to the controller, and which, when activated, sends a message signaling demand for accelerated regeneration, and a user-operated actuator (7) coupled to the controller and operable to start accelerated regeneration, wherein the memory (5) stores a plurality of judging values (J2), (J3) regarding an assumed value of the PM deposited amount and a term (T1) for reserving the judgment as to the demand for accelerated regeneration;the plurality of judging values (J2), (J3) comprises a value (J2) for judgment as to the demand for accelerated regeneration and a value (J3) for judgment as to starting the normal regeneration, higher than the judging value (J2);the controller compares the assumed value of the PM deposited amount with the plurality of judging values (J2), (J3);when the assumed value of the PM deposited amount has increased to the value (J3) for judgment as to starting the normal regeneration, the controller automatically enables the DPF regenerator (3) to start the normal regeneration processing (S2) so as to increase the temperature of the exhaust gas to be passed through the DPF (1);when the normal regeneration processing is being continued (S6) since it has started (S2), the time when the term (T1) for reserving the judgment as to the demand for the accelerated regeneration has elapsed is regarded as the judging time (T3) as to the demand for accelerated regeneration, at this time (T3) for judgment as to the demand for accelerated regeneration, in the event that the assumed value of the PM deposited amount exceeds the value (J2) for judgment as to the demand for accelerated regeneration, the accelerated regeneration being deemed to be demanded and the controller allowing the indicator light (6) to start (S8) sending the message to demand the accelerated regeneration; andwhen the accelerated-regeneration starting operation has been performed by the user-operated actuator (7), the controller enables the DPF regenerator (3) to switch the normal regeneration processing over to the accelerated regeneration processing (S10) to increase the temperature of the exhaust gas to be passed through the DPF (1) so as to accelerate the regeneration speed of the DPF (1) more than the case of the normal regeneration processing. 2. The exhaust-gas processing device for a diesel engine according to claim 1, wherein the memory (5) stores a term (T2) for re-judgment as to the demand for accelerated regeneration, at the time (T3) for judgment as to the demand for accelerated regeneration, if the assumed value of the PM deposited amount is lower than the value (J2) for judgment as to the demand for accelerated regeneration, the accelerated regeneration being deemed to be not demanded, even if it enters the term (T2) for re-judgment as to the demand for accelerated regeneration in continuity with the time (T3) for judgment as to the demand for accelerated regeneration, the controller allowing the normal regeneration processing to continue (S12), when the assumed value of the PM deposited amount has increased to the value (J2) for judgment as to the demand for accelerated regeneration during the term (T2) for re-judgment as to the demand for accelerated regeneration, the accelerated regeneration being deemed to be demanded, the controller allowing the indicator light (6) to start (S8) sending the message to demand the accelerated regeneration, andthe time when the term (T2) for re-judgment as to the demand for accelerated regeneration has elapsed is taken as the time (T4) for finishing the re-judgment, at this time (T4) for finishing the re-judgment, if the assumed value of the PM deposited amount has not yet increased to the value (J2) for judgment as to the demand for accelerated regeneration, the controller allowing the normal regeneration processing to finish (S15). 3. The exhaust-gas processing device for a diesel engine according to claim 1, wherein when the controller allows the DPF regeneration (3) to perform the accelerated regeneration processing, when the assumed value of the PM deposited amount has decreased to the value for judgment (J2) as to the demand for accelerated regeneration, which is a lower limit value of the accelerated-regeneration demand, the controller allows the accelerated regeneration processing to finish (S19). 4. The exhaust-gas processing device for a diesel engine according to claim 1, further comprising an abnormality indicator light mounted to the machine and coupled to the controller, and which, when activated, sends information about an abnormality of the DPF, wherein the memory (5) stores a value (J4) for judging the abnormality of the DPF, higher than the judging value (J3) for starting the normal regeneration, andwhen the assumed value of the PM deposited amount has increased to the judging value (J4) as regards the abnormality of the DPF (1), the controller enables the abnormality indicator light (8) to start (S23) sending the information about the abnormality of the DPF (1). 5. The exhaust-gas processing device for a diesel engine according to claim 1, wherein the memory (5) stores the judging value (J1) for finishing the normal regeneration, lower than the value for judgment (J2) as to the demand for accelerated regeneration, andwhen the normal regeneration processing has decreased the assumed value of the PM deposited amount to the judging value (J1) for finishing the normal regeneration, the controller allows the normal regeneration processing to finish (S5), (S 15). 6. The exhaust-gas processing device for a diesel engine according to claim 1, wherein the normal regeneration processing is executed during at least either of the running and the working of the engine-loaded machine, andthe accelerated regeneration processing is effected while the machine is not working, during which both of the running and the working of the engine-loaded machine are interrupted. 7. The exhaust-gas processing device for a diesel engine according to claim 1, wherein the DPF regenerator (3) comprises a combination of a common-rail system (9) and a DOC (10) arranged upstream of the DPF (1), andthe normal regeneration processing and the accelerated regeneration processing incorporates un-burnt fuel into the exhaust gas by a post-injection performed through an injector (27) of the common-rail system (9) after a main-injection and the un-burnt fuel makes oxidation-combustion with the oxygen in the exhaust gas by the DOC (10) so as to increase the temperature of the exhaust gas (11) to be passed though the DPF (1).
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