Saddle type vehicle

Abstract

The present invention provides a saddle type vehicle. An exhaust purifier on the saddle type vehicle can confirm the catalyst standard and improve the exhaust purifying performance according to the configuration position of the catalyst when a plurality of catalysts are configured in series. The saddle type vehicle comprises an inner pipe assembly (181) of the exhaust purifier, wherein an exhaustpipe (51) is connected with a motor. The back end of the exhaust pipe is connected with the front end of a catalyst housing (180). The plurality of catalysts (a first catalyst (191), a second catalyst(192) and a third catalyst (193)) which comprises a carrier and the catalyst composition loaded by the carrier are separately accommodated and held in the catalyst casing. The catalyst housing is accommodated in a muffler (52). Additionally, the catalysts are set to a sequence that the first catalyst, the second catalyst and the third catalyst are sequentially provided from the upstream side of the exhaust air flow. The three catalysts, namely the first catalyst, the second catalyst and the third catalyst are sequentially configured in series in the catalyst housing.

Description

technical field [0001] The present invention relates to a saddle ride type vehicle. Background technique [0002] As a conventional saddle-riding vehicle, a vehicle is known in which a plurality of catalysts are provided as exhaust purification devices on the downstream side of an exhaust pipe connected to an engine (for example, refer to Patent Document 1). [0003] Patent Document 1: (Japanese) Unexamined Patent Publication No. 2001-12235 [0004] According to Patent Document 1 Figure 2 ~ Figure 4 , the exhaust cleaner 28 is connected to the rear end of the exhaust pipe 27 , and the muffler 29 is connected to the rear end of the exhaust cleaner 28 . [0005] In the exhaust gas purifier 28 , two catalyst carriers 34 , 34 are provided in cylindrical bodies 36 , 36 provided inside the cylindrical portion 31 , and these catalyst carriers 34 , 34 are arranged in series in the cylindrical bodies 36 , 36 . [0006] The catalyst carrier 34 has a honeycomb shape in cross section...

AI Technical Summary

Problems solved by technology

[0007] Although the same catalyst carriers 34, 34 are arranged in the cylindrical bodies 36, 36, among the catalyst carriers 34 on the upstream side close to the exhaust pipe 27 and the catalyst carriers 34 on the downstream side away from the exhaust pipe 27, the upstream side The catalyst carrier 34 on the downstream side contacts more unburned gas to promote its combustion than the catalyst carrier 34 on the downstream side, so that its temperature is higher than that of the catalyst carrier 34 on the downstream side. The strict conditions of the catalyst carrier 34 on the downstream side lead to the high quality of the catalyst carrier 34 on the downstream side, or the volume is too large due to thickening of the plate thickness, etc.

Images