Abstract: In a piping connection structure of a vehicle including: a throttle body connected to a power unit of the vehicle to adjust an intake air amount; a fuel injection device for injecting fuel to an intake passage including the throttle body; first pipings attached to the fuel injection device; and second pipings provided separately from the first pipings, and having end parts connected to the first pipings so as to intersect with the first pipings, a connection part between the first pipings and the second pipings has a long adjustment holes, which extend so as to allow adjustment of relative angles between the first pipings and the second pipings.

Abstract: In a straddle type vehicle including a body frame, a power unit supported to the body frame, and a throttle body connected to the power unit and adjusting the intake air amount, a gyro sensor for detecting behavior of the vehicle is arranged in the throttle body.

Abstract: In a piping connection structure of a vehicle including: a throttle body connected to a power unit of the vehicle to adjust an intake air amount; a fuel injection device for injecting fuel to an intake passage including the throttle body; first pipings attached to the fuel injection device; and second pipings provided separately from the first pipings, and having end parts connected to the first pipings so as to intersect with the first pipings, a connection part between the first pipings and the second pipings has a long adjustment holes, which extend so as to allow adjustment of relative angles between the first pipings and the second pipings.

Abstract: In a straddle type vehicle including a body frame, a power unit supported to the body frame, and a throttle body connected to the power unit and adjusting the intake air amount, a gyro sensor for detecting behavior of the vehicle is arranged in the throttle body.

Abstract: A V-type engine for a vehicle is provided with front and rear banks including intake and exhaust valves exposed to a combustion chamber, a valve operating device for operating the engine valves, a valve stop mechanism for stopping the operation of the engine valves according to an operational condition of the vehicle, and an actuator for driving a throttle valve. A valve stop mechanism is provided in either the front bank or the rear bank. An actuator provided in one of the front bank and the rear bank excluding the valve stop mechanism is lower in height than the actuator provided in the other of the front bank.

Abstract: An air intake control system is provided for an internal combustion engine of a vehicle. The control system includes an intake port of a cylinder head for an engine main body, a throttle body having a throttle valve and connected to the intake port, an electric actuator having an electric motor and arranged on the throttle body to drive open or close the throttle valve, and a connector disposed on a housing of the electric actuator in a position facing toward one axial end of a crankshaft. The connector is provided in order to connect to an outside conductor to the electric motor of the electric actuator. The resulting configuration facilitates the work to connecting the outside conductor to the connector.

Abstract: An intake air control system of a V-type internal combustion engine having cylinder axes formed in a V-shape with a crankshaft provided therebetween is provided. An operation input shaft driven by an operator's input and an operation input shaft turning angle sensor that detects a turning angle of the operation input shaft are also provided. A throttle body having a throttle valve is formed with an intake passage for each of the cylinders. The operation input shaft is located between valve shafts of an opposing pair of throttle valves that are located on opposing bank portions of the V-type internal combustion engine, when viewed from the direction of the crankshaft. The operation input shaft is disposed separately from the throttle valve shafts and the operation input shaft turning angle sensor is provided at a shaft end of the operation input shaft.

Abstract: An electronic throttle control device in a internal combustion engine for a vehicle can be improved in maintainability and can be reduced in size. An electronic throttle control device in a V-type internal combustion engine for a vehicle has a fuel injection valve and throttle valves in an intake passage. A throttle driving motor controls the opening angle of each throttle valve according to the amount of operation of a throttle grip performed by an operator of the vehicle. The throttle driving motor is located outside a region surrounded by the throttle bodies that are respectively connected to all of intake ports as viewed in plan.

Abstract: An intake charge regulating apparatus for an engine includes a throttle body having a throttle bore formed therein for communicating with an intake port, and a throttle valve for controlling flow through the throttle bore. A throttle-driving mechanism includes an electric motor and a transmission mechanism for decelerating a driving force of the electric motor and for transmitting the driving force to the throttle valve. A camshaft sprocket is fixed to an end portion of a camshaft, which is included in a valve train for driving intake and exhaust valves in a cylinder head to open and close. The throttle-driving mechanism is arranged opposite a side where the camshaft sprocket is located in an axis direction of the crankshaft. The electric motor is disposed between the throttle body and the cylinder head in top plan view.

Abstract: An internal combustion engine includes a cylinder head having a plurality of intake ports; throttle devices including a plurality of respective intake passages equipped with throttle valves therein; a plurality of fuel injection valves for injecting fuel into the corresponding intake passages; a fuel pipe adapted to supply fuel to the fuel injection valves; and a pulsation damper connected to the fuel pipe to damp fuel pressure pulsation. In the engine, a connection pipe coupled to the pulsation damper is formed between a plurality of branch portions with respect a longitudinal direction of the fuel pipe, adapted to deliver fuel from the fuel pipe to the fuel injection valves and the connection pipe is disposed to at least partially overlap the fuel injection valve as viewed from the longitudinal direction of the fuel pipe.

Abstract: An internal combustion engine includes a cylinder head having a plurality of intake ports; throttle devices including a plurality of respective intake passages equipped with throttle valves therein; a plurality of fuel injection valves for injecting fuel into the corresponding intake passages; a fuel pipe adapted to supply fuel to the fuel injection valves; and a pulsation damper connected to the fuel pipe to damp fuel pressure pulsation. In the engine, a connection pipe coupled to the pulsation damper is formed between a plurality of branch portions with respect a longitudinal direction of the fuel pipe, adapted to deliver fuel from the fuel pipe to the fuel injection valves and the connection pipe is disposed to at least partially overlap the fuel injection valve as viewed from the longitudinal direction of the fuel pipe.

Abstract: An intake air control system of a V-type internal combustion engine having cylinder axes formed in a V-shape with a crankshaft provided therebetween is provided. An operation input shaft driven by an operator's input and an operation input shaft turning angle sensor that detects a turning angle of the operation input shaft are also provided. A throttle body having a throttle valve is formed with an intake passage for each of the cylinders. The operation input shaft is located between valve shafts of an opposing pair of throttle valves that are located on opposing bank portions of the V-type internal combustion engine, when viewed from the direction of the crankshaft. The operation input shaft is disposed separately from the throttle valve shafts and the operation input shaft turning angle sensor is provided at a shaft end of the operation input shaft.

Abstract: A saddle ride type four-wheel vehicle includes an electronic control type fuel injection system in a fuel supply system for an engine mounted thereon, wherein a fuel pump is disposed on the rear side relative to the rotational center axis of front wheels and on the front side relative to the engine.

Abstract: An intake air control system of a V-type internal combustion engine is arranged in a V-shaped space defined between front and rear banks of the engine. The intake air control system includes front and rear throttle bodies having front and rear throttle valves thereon, and a plurality of electrically-operated actuators which drive the throttle valves. The electrically-operated actuators are arranged between the front and rear banks. The arrangement of the electrically-operated actuators prevents overheating thereof, and provides a storing space for disposing auxiliary equipment in a lower portion of the V-shaped space. The front bank includes an opening formed therein which directs wind towards the electrically-operated actuators disposed in the V-shaped space during operation of the vehicle.

Abstract: An intake charge regulating apparatus for an engine includes a throttle body having a throttle bore formed therein for communicating with an intake port, and a throttle valve for controlling flow through the throttle bore. A throttle-driving mechanism includes an electric motor and a transmission mechanism for decelerating a driving force of the electric motor and for transmitting the driving force to the throttle valve. A camshaft sprocket is fixed to an end portion of a camshaft, which is included in a valve train for driving intake and exhaust valves in a cylinder head to open and close. The throttle-driving mechanism is arranged opposite a side where the camshaft sprocket is located in an axis direction of the crankshaft. The electric motor is disposed between the throttle body and the cylinder head in top plan view.

Abstract: A V-type engine for a vehicle is provided with front and rear banks including intake and exhaust valves exposed to a combustion chamber, a valve operating device for operating the engine valves, a valve stop mechanism for stopping the operation of the engine valves according to an operational condition of the vehicle, and an actuator for driving a throttle valve. A valve stop mechanism is provided in either the front bank or the rear bank. An actuator provided in one of the front bank and the rear bank excluding the valve stop mechanism is lower in height than the actuator provided in the other of the front bank.

Abstract: An intake air control device is provided in which a valve shaft extends in the left and right direction of a vehicle body frame across an air intake path, and is rotatably supported by an air intake path forming body connected to an engine body, equalizing the distances from a center of the vehicle body frame in the left and right direction to both ends of the intake air control device when arranging the air intake path forming body at the center of the vehicle body frame in the left and right direction. An actuator, which applies a motive power to drive the valve shaft, is connected to one end of the valve shaft, and a throttle operating amount sensor for detecting the throttle operating amount by a vehicle operator is supported by the air intake path forming body and connected to the other end of the valve shaft.

Abstract: An air intake control system is provided for an internal combustion engine of a vehicle. The control system includes an intake port of a cylinder head for an engine main body, a throttle body having a throttle valve and connected to the intake port, an electric actuator having an electric motor and arranged on the throttle body to drive open or close the throttle valve, and a connector disposed on a housing of the electric actuator in a position facing toward one axial end of a crankshaft. The connector is provided in order to connect to an outside conductor to the electric motor of the electric actuator. The resulting configuration facilitates the work to connecting the outside conductor to the connector.

Abstract: An electronic throttle control device in a internal combustion engine for a vehicle can be improved in maintainability and can be reduced in size. An electronic throttle control device in a V-type internal combustion engine for a vehicle has a fuel injection valve and throttle valves in an intake passage. A throttle driving motor controls the opening angle of each throttle valve according to the amount of operation of a throttle grip performed by an operator of the vehicle. The throttle driving motor is located outside a region surrounded by the throttle bodies that are respectively connected to all of intake ports as viewed in plan.

Abstract: An intake air control system of a V-type internal combustion engine is arranged in a V-shaped space defined between front and rear banks of the engine. The intake air control system includes front and rear throttle bodies having front and rear throttle valves thereon, and a plurality of electrically-operated actuators which drive the throttle valves. The electrically-operated actuators are arranged between the front and rear banks. The arrangement of the electrically-operated actuators prevents overheating thereof, and provides a storing space for disposing auxiliary equipment in a lower portion of the V-shaped space. The front bank includes an opening formed therein which directs wind towards the electrically-operated actuators disposed in the V-shaped space during operation of the vehicle.