EXHAUST APPARATUS FOR FOUR WHEELED UTILITY VEHICLE

• US 20140237994A1
• Filed: 02/28/2013
• Published: 08/28/2014
• Est. Priority Date: 02/28/2013
• Status: Active Grant

• Current Assignee: Kawasaki Motors Ltd (Kawasaki Heavy Industries Limited)
• Original Assignee: Kawasaki Jukogyo Kabushiki Kaisha (Kawasaki Heavy Industries Limited)
• Inventors: TAKAGI, Jun
• Granted Patent: US 8,893,471 B2
• Time in Patent Office: Days
• US Class Current: 60/276
• CPC Class Codes: F01N 11/00 Monitoring or diagnostic devices for exhaust-gas treatment apparatus , e.g. for catalytic activity safety, indicating or supervising devices for internal combustion engines F02B77/08; testing of machines G01M13/00
• CPC Class Codes: F01N 13/008 Mounting or arrangement of exhaust sensors in or on exhaust apparatus sensor arrangements for engine control F02D41/1439
• CPC Class Codes: F01N 13/08 Other arrangements or adaptations of exhaust conduits pipes, joints or supports therefor in general F16L; collecting or removing exhaust gases of vehicle engines in workshops B08B15/00, on highways E01C1/005
• CPC Class Codes: F01N 2260/022 using air
• CPC Class Codes: F01N 2340/04 characterised by the arrangement of an exhaust pipe, manifold or apparatus in relation to vehicle frame or particular vehicle parts
• CPC Class Codes: F01N 3/2885 with exhaust silencers in a single housing
• CPC Class Codes: Y02A 50/20 Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Abstract

Provided is an exhaust apparatus for a utility vehicle which discharges exhaust gas from exhaust pipes connected to exhaust ports of an engine including cylinders, the apparatus including an exhaust gathering portion gathering the exhaust pipes, a catalyst portion located on a downstream side of the exhaust gathering portion and purifying the exhaust gas, and a sensor attaching pipe provided between the exhaust gathering portion and the catalyst portion and to which an exhaust gas sensor is detachably attached, wherein the sensor attaching pipe, in a state where the exhaust gas sensor is attached, has a height in which a sensing portion of the exhaust gas sensor is located in the sensor attaching pipe, and the sensor attaching pipe is provided such that a top end to which the exhaust gas sensor is detachably attached is located above a base end and away from a surrounding heat source.

Claims

1. An exhaust apparatus for a utility vehicle which discharges exhaust gas from a plurality of exhaust pipes connected to exhaust ports of an engine including a plurality of cylinders, the apparatus comprising:

an exhaust gathering portion gathering the exhaust pipes;

a catalyst portion located on a downstream side of the exhaust gathering portion and purifying the exhaust gas; and

a sensor attaching pipe provided between the exhaust gathering portion and the catalyst portion and to which an exhaust gas sensor is detachably attached, wherein

the sensor attaching pipe, in a state where the exhaust gas sensor is attached, has a height in which a sensing portion of the exhaust gas sensor is located in the sensor attaching pipe, and

the sensor attaching pipe is provided such that a top end to which the exhaust gas sensor is detachably attached is located above a base end and away from a surrounding heat source.

2. The exhaust apparatus for the utility vehicle according to claim 1, wherein

the top end of the sensor attaching pipe is tilted toward an exhaust downstream side.

3. The exhaust apparatus for the utility vehicle according to claim 1, wherein

punching metals for holding noise absorbing members are provided on inner surfaces of the exhaust gathering portion, an inside of the sensor attaching pipe and an inside of the exhaust pipes communicating with each other through holes in the punching metals.

4. The exhaust apparatus for the utility vehicle according to claim 1, wherein

the utility vehicle includes a V-belt type continuously variable transmission having a cooling device,

the cooling device includes an exhaust duct that discharges air in the V-belt type continuously variable transmission, and

the exhaust duct includes at a discharge port a guiding member for guiding the air discharged from the exhaust duct to the exhaust gas sensor.

5. The exhaust apparatus for the utility vehicle according to claim 1, wherein

an exhaust upstream end of the catalyst portion is abutted onto exhaust downstream ends of the punching metals to perform positioning in an exhaust flow direction of the catalyst portion in the exhaust pipes.