EXHAUST GAS PURIFICATION SYSTEM OF WORKING MACHINE

• US 20190010843A1
• Filed: 04/25/2011
• Published: 01/10/2019
• Est. Priority Date: 04/30/2010
• Status: Active Grant

• Current Assignee: Yanmar Power Technology Co., Ltd.
• Original Assignee: Yanmar Company Limited (Yanmar Holdings Co., Ltd.)
• Inventors: SAITOU, Kenta
• Granted Patent: US 10,371,027 B2
• Time in Patent Office: Days
• CPC Class Codes: F01N 13/0097 the purifying devices are arranged in a single housing
• CPC Class Codes: F01N 2550/04 Filtering activity of particulate filters
• CPC Class Codes: F01N 2900/1602 Temperature of exhaust gas apparatus
• CPC Class Codes: F01N 3/0235 using exhaust gas throttling means
• CPC Class Codes: F01N 3/0253 adding fuel to exhaust gases
• CPC Class Codes: F01N 3/0335 with exhaust silencers in a single housing
• CPC Class Codes: F01N 3/035 with catalytic reactors , e.g. catalysed diesel particulate filters
• CPC Class Codes: F01N 9/002 of filter regeneration, e.g. detection of clogging
• CPC Class Codes: F02D 2200/0802 Temperature of the exhaust gas treatment apparatus
• CPC Class Codes: F02D 2200/0812 Particle filter loading
• CPC Class Codes: F02D 41/0002 Controlling intake air
• CPC Class Codes: F02D 41/021 Introducing corrections for particular conditions exterior to the engine conjoint control of vehicle sub-units for propelling the vehicle B60W30/18
• CPC Class Codes: F02D 41/025 by changing the composition of the exhaust gas, e.g. for exothermic reaction on exhaust gas treating apparatus
• CPC Class Codes: F02D 41/029 the exhaust gas treating apparatus being a particulate filter
• CPC Class Codes: F02D 41/1448 the characteristics being an exhaust gas pressure
• CPC Class Codes: F02D 41/405 with post injections
• CPC Class Codes: Y02T 10/12 Improving ICE efficiencies
• CPC Class Codes: Y02T 10/40 Engine management systems

Abstract

An exhaust gas purification system of a working machine is operable to reduce a loss of a working time caused by a point that it takes a long time to renew an exhaust gas purification device by throttle devices. The exhaust gas purification system of the working machine is provided with a common rail type engine which is mounted to the working machine, an exhaust gas purification device which is arranged in an exhaust system of the engine, and at least one of the intake air throttle device and the exhaust gas throttle device. It is provided with mode selection input means which selects whether an auxiliary renewing mode is executed or a forced renewing mode is executed in the case that a clogged state of the exhaust gas purification device is equal to or more than a prescribed level.

Claims

1. An exhaust gas purification system of a working machine, comprising:

a common rail type engine which is mounted to a working machine;

an exhaust gas purification device which is arranged in an exhaust system of the engine; and

at least one of an intake air throttle device and an exhaust gas throttle device which are arranged in intake and exhaust systems of the engine,

wherein the exhaust gas purification system is structured so as to execute an auxiliary renewing mode which raises a temperature of an exhaust gas from the engine by actuating the at least one throttle device, and a forced renewing mode which supplies a fuel into the exhaust gas purification device on the basis of a post injection, and

the exhaust gas purification system includes mode selection input means which selects whether the auxiliary renewing mode is executed or the forced renewing mode is executed in the case that a clogged state of the exhaust gas purification device is equal to or more than a prescribed level.

2. The exhaust gas purification system of the working machine according to claim 1, wherein the exhaust gas purification system is structured such that in the case that the clogged state of the exhaust gas purification device is not improved even by executing the auxiliary renewing mode, the forced renewing mode is executed regardless of a selection state of the mode selection input means.

3. The exhaust gas purification system of the working machine according to claim 2, further comprising forced renewal advance notifying means which is actuated before the forced renewing mode is executed.

4. The exhaust gas purification system of the working machine according to claim 1, wherein the exhaust gas purification system is structured such that the auxiliary renewing mode is not executed regardless of the clogged state of the exhaust gas purification device, during an operation of the operating means with respect to a working portion which is provided in the working machine.

5. The exhaust gas purification system of the working machine according to claim 4, further comprising renewal inhibition informing means which is actuated in the case that the auxiliary renewing mode is not executed under a condition that the clogged state of the exhaust gas purification device is equal to or more than the prescribed level.

6. The exhaust gas purification system of the working machine according to claim 4, wherein the exhaust gas purification system is structured such that an execution inhibition of the auxiliary renewing mode is released in the case that a predetermined time elapses in a non-operation state after an end of the operation of the operating means, under a condition that the clogged state of the exhaust gas purification device is equal to or more than the prescribed level.

7. The exhaust gas purification system of the working machine according to claim 1, wherein the exhaust gas purification system is structured such that the auxiliary renewing mode is executed regardless of the clogged state of the exhaust gas purification device, in the case that the temperature of the exhaust gas within the exhaust gas purification device is equal to or less than a previously set prescribed temperature.

8. The exhaust gas purification system of the working machine according to claim 7, wherein the exhaust gas purification system is structured so as to come back to a normal operation mode after a predetermined time elapses, in the case that the auxiliary renewing mode is executed on the basis of the temperature of the exhaust gas within the exhaust gas purification device.

9. The exhaust gas purification system of the working machine according to claim 8, wherein an executing time of the auxiliary renewing mode on the basis of the temperature of the exhaust gas within the exhaust gas purification device is set shorter than an executing time of the auxiliary renewing mode on the basis of the clogged state of the exhaust gas purification device.

10. The exhaust gas purification system of the working machine according to claim 5, wherein the exhaust gas purification system is structured such that an execution inhibition of the auxiliary renewing mode is released in the case that a predetermined time elapses in a non-operation state after an end of the operation of the operating means, under a condition that the clogged state of the exhaust gas purification device is equal to or more than the prescribed level.