Fuel injection system and related structure for a four-wheeled saddle-type vehicle
First Claim
1. A saddle riding type four-wheeled vehicle suitable for operation on rough terrain, said vehicle comprising an engine, the engine comprising a fuel supply system and a cylinder head, the fuel supply system comprising an electronically controlled fuel injection system and a throttle body, wherein the throttle body is disposed rearwardly of the cylinder head of the engine.
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Accused Products
Abstract
A saddle riding type four-wheeled vehicle, suitable for rough terrain running, includes an engine having an electronically controlled fuel injection system. The vehicle also includes a throttle body disposed in back of a cylinder head of the engine. This configuration substantially protects the engine from drawing in mud, dust, and the like, and also eliminates the need for a protector of a throttle body. The fuel pump unit of the fuel injection system integrates the fuel pump, the fuel filter, and the pressure regulator into a single housing, to simplify the fuel piping required to connect different parts of the fuel supply system, as compared with conventional structures. This facilitates procedures of removing and installing the fuel tank and the fuel pump unit. The feature also reduces pumping loss of the fuel pump as well as parts cost.
53 Citations
11 Claims
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1. A saddle riding type four-wheeled vehicle suitable for operation on rough terrain, said vehicle comprising an engine, the engine comprising a fuel supply system and a cylinder head, the fuel supply system comprising an electronically controlled fuel injection system and a throttle body, wherein
the throttle body is disposed rearwardly of the cylinder head of the engine.
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2. A saddle riding type four-wheeled vehicle suitable for operation on rough terrain, said vehicle comprising a frame and an engine mounted thereon, the engine comprising a cylinder head and an electronically controlled fuel injection system in a fuel supply system, wherein the electronically controlled fuel injection system comprises a throttle body and an air cleaner, and wherein
the throttle body and the air cleaner are disposed in that order toward the rear of the vehicle relative to the cylinder head of the engine.
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5. A four-wheeled all terrain vehicle comprising an engine positioned substantially mid way between a front end and a rear end of the vehicle, the vehicle further comprising a fuel supply system wherein
the fuel supply system comprises an electronically controlled fuel injector and a fuel pump unit, wherein the fuel injector is positioned rearward of the engine and the fuel pump unit is positioned in front of the engine.
Specification