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Vehicle engine exhaust mechanism

A technology of two-wheeled motor vehicles and engines, which is applied in the direction of machines/engines, motor vehicles, engine components, etc., which can solve problems such as limitations and achieve the effect of small configuration space

Inactive Publication Date: 2008-12-17
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when the engine is placed at a low position to ensure the lowest ground clearance and the vehicle's center of gravity is lowered, there will be restrictions on the low position of the engine.

Method used

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  • Vehicle engine exhaust mechanism
  • Vehicle engine exhaust mechanism
  • Vehicle engine exhaust mechanism

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0042] Fig. 1~Fig. 9 represent the first embodiment of this aspect, and Fig. 1 is the side view of small motorcycle, figure 2 Fig. 3 is a plan view of the power unit, Fig. 4 is a view from direction 4 of Fig. 3, Fig. 5 is a view from direction 5 of Fig. 3, Fig. 6 is a view from direction 6- of Fig. 1 6-line profile, Figure 7 It is an enlarged partial cutaway side view showing the vicinity of the steering handle lock device. FIG. 8 is an enlarged longitudinal cutaway side view showing the rear of the scooter. FIG.

[0043] First, in FIG. 1 , the body frame F of the scooter has: a head pipe 17 that steerably supports a front fork 15 that pivotally supports the front wheel WF and a steering handle 16 connected to the front fork 15; Bypass pipe 18..., which extends backward and downward from the head pipe 17; a pair of left and right down pipes 19..., which are connected to the above-mentioned head pipe 17 below these bypass pipes 18... The through pipe 18 ... extends backward ...

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PUM

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Abstract

An engine exhaust structure for a two-wheeled motor vehicle. This two-wheeled motor vehicle mounts an engine having at least a cylinder block and a cylinder head with a forward-inclined cylinder axis on a vehicle body frame, and combines storage and the engine on a crankcase provided with the engine. The transmission case that together constitutes the transmission of the power unit has an exhaust pipe connected to the cylinder head of the forward-inclined cylinder axis at the upstream end and extends to the rear through the bottom of the power unit. In this two-wheeled vehicle, the engine can be arranged in A lower position to achieve a lower center of gravity. A storage recess (98) for housing at least an upper portion of the exhaust pipe (94) is provided below the bottom wall (48a) of the transmission case (48).

Description

technical field [0001] The present invention relates to a two-wheeled motor vehicle in which an engine having at least a cylinder block and a cylinder head with a forwardly inclined cylinder axis is mounted on a vehicle body frame, and a crankcase provided on the above-mentioned engine is combined with a storage unit to form power together with the above-mentioned engine. The transmission case of the transmission of the device, the exhaust pipe on the above-mentioned cylinder head connected to the forward-inclined cylinder axis at the upstream end passes through the bottom of the above-mentioned power device and extends rearward, especially related to the improvement of the engine exhaust structure. Background technique [0002] Such a vehicle is known from Patent Document 1, for example. [0003] Patent Document 1: JP-A-2004-116423 [0004] However, in the device disclosed in the above-mentioned Patent Document 1, the V-shaped engine is mounted on the vehicle body frame, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N7/08B60K13/04B62K7/02F01N13/08
Inventor 丸山智千
Owner HONDA MOTOR CO LTD