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Saddle riding type vehicle

A technology for riding vehicles and riders, applied in electrical control, automatic control, machine/engine, etc., to improve the sensitivity of changes, high-precision detection, and reduce costs

Active Publication Date: 2015-07-08
YAMAHA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in a two-wheeled motor vehicle equipped with a catalyst, in order to activate the catalyst early, control is performed to increase the amount of intake air and retard the ignition timing.

Method used

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  • Saddle riding type vehicle
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] figure 1 It is a side view showing the overall structure of the motorcycle of Embodiment 1.

[0051] The motorcycle 1 of this embodiment includes a main frame 3 , front wheels 5 , rear wheels 7 , a fuel tank 9 , a seat 11 , and an engine 13 . The main frame 3 forms the skeleton of the motorcycle 1, and includes a head pipe 15 at the front and a rear frame 17 at the rear. A steering handle 19 is provided on the head pipe 15 . The handlebar 19 includes a front fork 21 rotatably attached around the axis of the head pipe 15 . The front fork 21 is rotatably attached to the lower end portion of the front wheel 5 . The seat 11 is mounted on an upper portion of the main frame 3 and an upper portion of a rear frame 17 extending to the rear of the main frame 3 . On the top of the main frame 3, behind the steering handle 19 and in front of the seat 11, a fuel tank 9 is installed. The engine 13 is mounted on the lower part of the main frame 3 . One end portion of the rear arm...

Embodiment 2

[0079] Next, Embodiment 2 of the present invention will be described with reference to the drawings.

[0080] Figure 9 It is a side view showing the overall structure of the motorcycle of Embodiment 2, Figure 10 It is a left side view showing a part of the motorcycle of Example 2 including an engine.

[0081] The two-wheeled motor vehicle 1A of this embodiment is a pedal type in which a rider rides with both feet placed on the pedals. This motorcycle 1A includes a main frame 3 , front wheels 5 , rear wheels 7 , a fuel tank 9 , a seat 11 , an engine 13 , a head pipe 15 , a handlebar 19 and a front fork 21 .

[0082] In the engine 13 of this motorcycle 1A, the cylinder 27 is deeply inclined so as to be nearly horizontal toward the front. In the engine 13 , an intake pressure sensor 65 is mounted directly downstream of the throttle device 57 in the intake pipe 29 . The throttle device 57 is arranged above the engine 13 , in front of the rear end of the engine 14 in side vie...

Embodiment 3

[0086] Next, Embodiment 3 of the present invention will be described with reference to the drawings.

[0087] Figure 11 It is a side view showing the overall structure of the motorcycle of Embodiment 3, Figure 12 It is a left side view showing a part of the engine of the motorcycle of Example 3.

[0088] The motorcycle 1B of this embodiment is of the same type as the above-mentioned Embodiment 1, and has a smaller displacement than that of Embodiment 1. This motorcycle 1B includes a main frame 3 , front wheels 5 , rear wheels 7 , a fuel tank 9 , a seat 11 , an engine 13 , a head pipe 15 , a handlebar 19 and a front fork 21 .

[0089] In the engine 13 of the motorcycle 1B, an intake air pressure sensor 65 is directly attached to the intake pipe 29 . The throttle device 57 is arranged above the crankcase 25 of the engine 13 , and is arranged in front of the rear end of the engine 13 in a side view, and is arranged between the front end and the rear end of the engine 13 . I...

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Abstract

A saddle riding type vehicle driven by a straddling rider includes an engine having a combustion chamber, an inlet pipe for introducing a fuel-air mixture into the combustion chamber, an air throttle valve attached to the inlet pipe for adjusting quantity of the fuel-air mixture supplied to the combustion chamber, an inlet pipe pressure detector for detecting, as inlet pipe pressure, a manifold air pressure in the inlet pipe downstream of the air throttle valve, and a determiner for determining that combustion in the engine has become unstable based on variations in the inlet pipe pressure.

Description

technical field [0001] The present invention relates to a saddle type vehicle that travels in a state in which a rider straddles the vehicle, and in particular relates to a technique for detecting that combustion of an engine becomes unstable. Background technique [0002] In saddle-riding vehicles such as motorcycles using engines as power sources, measures to protect the environment are required. Specifically, countermeasures such as improving the purification performance of exhaust gas or improving fuel economy can be mentioned. In such countermeasures, it is important to determine the stability of combustion. That is, when combustion becomes unstable, unburned gas is discharged as tail pipe emission (tail pipe emission), which affects the purification performance and fuel economy of exhaust gas. Therefore, by detecting that combustion becomes unstable with high precision, it is possible to perform control to stabilize combustion with high precision, thereby improving p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D45/00F02D41/02F02P5/145
CPCF02D41/0002F02D2200/0406F02D41/18F02D2200/1015F02D41/1498Y02T10/40
Inventor 和知明良西垣昌登
Owner YAMAHA MOTOR CO LTD
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