EXHAUST GAS PURIFICATION SYSTEM OF WORKING MACHINE

• US 20130067895A1
• Filed: 04/28/2011
• Published: 03/21/2013
• Est. Priority Date: 05/07/2010
• Status: Active Grant

• Current Assignee: Yanmar Power Technology Co., Ltd.
• Original Assignee: Yanmar Company Limited (Yanmar Holdings Co., Ltd.)
• Inventors: Noma, Yasuo
• Granted Patent: US 8,844,273 B2
• Time in Patent Office: Days
• US Class Current: 60/311
• CPC Class Codes: F01N 11/002 the diagnostic devices measuring or estimating temperature or pressure in, or downstream of the exhaust apparatus
• CPC Class Codes: F01N 13/0097 the purifying devices are arranged in a single housing
• CPC Class Codes: F01N 2240/36 an exhaust flap
• CPC Class Codes: F01N 2550/04 Filtering activity of particulate filters
• CPC Class Codes: F01N 3/023 using means for regenerating the filters, e.g. by burning trapped particles by electrically controlling the supply of combustible mixture or its constituents only F02D41/0235
• CPC Class Codes: F01N 3/0231 using special exhaust apparatus upstream of the filter for producing nitrogen dioxide, e.g. for continuous filter regeneration systems [CRT]
• CPC Class Codes: F01N 3/0235 using exhaust gas throttling means
• CPC Class Codes: F01N 3/103 Oxidation catalysts for HC and CO only
• CPC Class Codes: F02D 2200/101 Engine speed
• CPC Class Codes: F02D 29/02 peculiar to engines driving vehicles; peculiar to engines driving variable pitch propellers
• CPC Class Codes: F02D 31/001 Electric control of rotation speed
• CPC Class Codes: F02D 41/0245 by increasing temperature of the exhaust gas leaving the engine
• CPC Class Codes: F02D 41/029 the exhaust gas treating apparatus being a particulate filter
• CPC Class Codes: F02D 41/402 Multiple injections
• CPC Class Codes: Y02T 10/40 Engine management systems

Abstract

An exhaust gas purification device arranged in an exhaust system of an engine, and includes a renewing device for burning and removing a particulate matter within the exhaust gas purification device. The renewing device is operable in the case that a clogged state of the exhaust gas purification device is equal to or more than a prescribed level, wherein the exhaust gas purification system includes renewal admittance input means which allows an actuation of the renewing device, and rotating speed holding input means for holding a rotating speed of the engine to a predetermined rotating speed, and in the case that a turn-on operation of the rotating speed holding input means is carried out in a state in which an allowing operation of the renewal admittance input means is carried out, the rotating speed holding motion of the engine is executed in preference to an actuation of the renewing device.

Claims

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

an engine which is mounted to the working machine;

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

a renewing device for burning and removing a particulate matter within the exhaust gas purification device, and the renewing device being operable in the case that a clogged state of the exhaust gas purification device is equal to or more than a prescribed level, wherein

the exhaust gas purification system comprises renewal admittance input means which allows an actuation of the renewing device and rotating speed holding input means for holding a rotating speed of the engine to a predetermined rotating speed, and

in the case that a turn-on operation of the rotating speed holding input means is carried out in a state in which an allowing operation of the renewal admittance input means is carried out, the rotating speed holding motion of the engine is executed in preference to an actuation of the renewing device.

2. The exhaust gas purification system of the working machine according to claim 1, wherein the rotating speed holding motion of the engine is executed in a state in which an allowing operation of the renewal admittance input means is carried out.

3. The exhaust gas purification system of the working machine according to claim 2, wherein in the case that the turn-on operation of the rotating speed holding input means is carried out under actuation of the renewing device, the actuation of the renewing device is stopped and the rotating speed holding motion of the engine is executed.

4. The exhaust gas purification system of the working machine according to claim 2, wherein in the case that the clogged state of the exhaust gas purification device becomes equal to or more than a critical level exceeding the prescribed level under execution of the rotating speed holding motion of the engine, the rotating speed holding motion of the engine is stopped and the renewing device is actuated.

5. The exhaust gas purification system of the working machine according to claim 4, further comprising renewal advance notifying means which is actuated in the case that the clogged state of the exhaust gas purification device becomes equal to or more than the critical level.

6. The exhaust gas purification system of the working machine according to claim 3, wherein in the case that the clogged state of the exhaust gas purification device becomes equal to or more than a critical level exceeding the prescribed level under execution of the rotating speed holding motion of the engine, the rotating speed holding motion of the engine is stopped and the renewing device is actuated.

7. The exhaust gas purification system of the working machine according to claim 6, further comprising renewal advance notifying means which is actuated in the case that the clogged state of the exhaust gas purification device becomes equal to or more than the critical level.