Abstract: In a rocking vehicle, a front wheel suspension device suspends a front wheel in an upwardly displaceable manner due to a reaction force from a road surface. The rocking vehicle includes a cushion support arm, on a body frame side, including a cushion support portion of the front wheel suspension device, and a rigidity adjustment device which is extended between plural portions of the cushion support arm. The rigidity adjustment device applies a pre-tension to the cushion support arm, and the pre-tension generates a pre-force component in the cushion support portion in the same direction as the upward moving direction of the front wheel due to a reaction force of the front wheel from the road surface.

Abstract: In a rocking vehicle, a front wheel suspension device suspends a front wheel in an upwardly displaceable manner due to a reaction force from a road surface. The rocking vehicle includes a cushion support arm, on a body frame side, including a cushion support portion of the front wheel suspension device, and a rigidity adjustment device which is extended between plural portions of the cushion support arm. The rigidity adjustment device applies a pre-tension to the cushion support arm, and the pre-tension generates a pre-force component in the cushion support portion in the same direction as the upward moving direction of the front wheel due to a reaction force of the front wheel from the road surface.

Abstract: In a motorcycle having an air intake passage guiding an air flow to an internal combustion engine is formed between an upper surface of a front fender and a bottom plate of a front cowl covering a head pipe from the front and disposed just above a front wheel. The cooling performance of a heat exchanger disposed behind the front wheel and in front of an engine body is improved with a decrease in the air resistance by lowering the position of the front cowl. At least a part of an air intake duct is disposed above a front fender for supplying the air guided from an air flow inlet provided on the front end portion of a front cowl to an inlet system of an internal combustion engine. At least a part of the air intake duct forming a rear air intake passage is contained in the front cowl.

Abstract: In a motorcycle having an air intake passage guiding an air flow to an internal combustion engine is formed between an upper surface of a front fender and a bottom plate of a front cowl covering a head pipe from the front and disposed just above a front wheel. The cooling performance of a heat exchanger disposed behind the front wheel and in front of an engine body is improved with a decrease in the air resistance by lowering the position of the front cowl. At least a part of an air intake duct is disposed above a front fender for supplying the air guided from an air flow inlet provided on the front end portion of a front cowl to an inlet system of an internal combustion engine. At least a part of the air intake duct forming a rear air intake passage is contained in the front cowl.

Abstract: In an output buffer circuit having a de-emphasis function, when the de-emphasis function is enabled, AC common-mode noise can occur which does not occur when the de-emphasis function is disabled. Besides, the de-emphasis can cause a reduction in de-emphasis strength. A current correction circuit is provided to correct currents supplied to two buffer circuits that provide the de-emphasis function, such that AC common-mode noise is suppressed and the reduction in the de-emphasis strength is prevented in a state in which the de-emphasis function is enabled.

Abstract: A driver circuit including a pre-driver B1 that operates by receiving operating power from a first power supply VDDI, and a main-driver B2 that receives operating power from a second power supply VDDE, amplifies an output signal from the pre-driver B1, and outputs the amplified signal. It also includes a first switch B4 between the first power supply VDDI and the pre-driver B1. It also includes a second switch B5 between the second power supply VDDE and the main-driver B2. A overvoltage protection sequence circuit B3 controls the On/Off states of the first switch B4 and the second switch B5 to controls the On/Off order of the pre-driver B1 and the main-driver B2. By doing so, the overvoltage protection sequence circuit B3 prevent an overvoltage from being applied to the driver circuit, especially to the main-driver B2.

Abstract: A driver circuit including a pre-driver B1 that operates by receiving operating power from a first power supply VDDI, and a main-driver B2 that receives operating power from a second power supply VDDE, amplifies an output signal from the pre-driver B1, and outputs the amplified signal. It also includes a first switch B4 between the first power supply VDDI and the pre-driver B1. It also includes a second switch B5 between the second power supply VDDE and the main-driver B2. A overvoltage protection sequence circuit B3 controls the On/Off states of the first switch B4 and the second switch B5 to controls the On/Off order of the pre-driver B1 and the main-driver B2. By doing so, the overvoltage protection sequence circuit B3 prevent an overvoltage from being applied to the driver circuit, especially to the main-driver B2.

Abstract: A failure diagnosis apparatus for diagnosing a failure of an evaporative fuel processing system. A pressure in the evaporative fuel processing system is detected, and a purge control valve and a vent shut valve are closed when stoppage of the engine is detected. A determination is made as to whether there is a leak in the evaporative fuel processing system based on the detected pressure during a predetermined determination period after closing of the purge control and vent shut valves.

Abstract: An atmosphere-vented valve (a pressure relief section) is opened in a predetermined amount so as to reduce an inside pressure of a canister to a predetermined negative pressure (S14) while preventing an inside pressure in a fuel tank from becoming an excessively negative pressure by closing a charge passageway opening and closing valve (S18), and purging is controlled while the canister inside pressure is being reduced, whereby from a similar principle to that of vacuum distillation, the release of vaporized fuel from an absorbent is promoted so as not only to increase the purge efficiency but also to prevent the application of an unnecessary stress to the fuel tank.

Abstract: A failure diagnosis apparatus for diagnosing a failure of an evaporative fuel processing system. The system includes a fuel tank, a canister having adsorbent for adsorbing evaporative fuel generated in the fuel tank, an air passage connected to the canister and communicating the canister with the atmosphere, a first passage for connecting the canister and the fuel tank, a second passage for connecting the canister and an intake system of an internal combustion engine, a vent shut valve for opening and closing the air passage, and a purge control valve provided in the second passage. A pressure in the evaporative fuel processing system is detected. Negative pressure in the intake system is reserved in a negative pressure reservoir during operation of the engine. The purge control valve and the vent shut valve are closed to introduce the reserved negative pressure into the evaporative fuel processing system, when stoppage of the engine is detected.

Abstract: A phase interpolator circuitry is composed of a delay line, and a phase blender circuit. The delay line delays a first input clock signal to develop a delayed clock signal. The phase blender circuit includes a first inverter receiving the delayed clock signal, and a second inverter receiving a second input clock signal phased away from the first input clock signal. The outputs of the first and second inverters are commonly coupled together. The phase interpolator circuitry additionally includes at least one of constant current sources: first one connected between a power terminal of the first inverter and a power supply, second one connected between a ground terminal of the first inverter and ground, third one connected between a power terminal of the second inverter and a power supply, and fourth one connected between a ground terminal of the second inverter and ground.

Abstract: An atmosphere-vented valve (a pressure relief section) is opened in a predetermined amount so as to reduce an inside pressure of a canister to a predetermined negative pressure (S14) while preventing an inside pressure in a fuel tank from becoming an excessively negative pressure by closing a charge passageway opening and closing valve (S18), and purging is controlled while the canister inside pressure is being reduced, whereby from a similar principle to that of vacuum distillation, the release of vaporized fuel from an absorbent is promoted so as not only to increase the purge efficiency but also to prevent the application of an unnecessary stress to the fuel tank.

Abstract: A failure diagnosis apparatus for diagnosing a failure of an evaporative fuel processing system. A pressure in the evaporative fuel processing system is detected, and a purge control valve and a vent shut valve are closed when stoppage of the engine is detected. A determination is made as to whether there is a leak in the evaporative fuel processing system based on the detected pressure during a predetermined determination period after closing of the purge control and vent shut valves.

Abstract: A failure diagnosis apparatus for diagnosing a failure of an evaporative fuel processing system. The system includes a fuel tank, a canister having adsorbent for adsorbing evaporative fuel generated in the fuel tank, an air passage connected to the canister and communicating the canister with the atmosphere, a first passage for connecting the canister and the fuel tank, a second passage for connecting the canister and an intake system of an internal combustion engine, a vent shut valve for opening and closing the air passage, and a purge control valve provided in the second passage. A pressure in the evaporative fuel processing system is detected. Negative pressure in the intake system is reserved in a negative pressure reservoir during operation of the engine. The purge control valve and the vent shut valve are closed to introduce the reserved negative pressure into the evaporative fuel processing system, when stoppage of the engine is detected.

Abstract: An evaporative fuel control system for an internal combustion engine having a throttle valve includes a canister for adsorbing evaporative fuel generated in the fuel tank, a purging passage for purging evaporative fuel into the intake system of the engine, and a purge control valve for controlling a flow rate of the evaporative fuel to be purged into the intake system through the purging passage. An ECU sets an air-fuel ratio correction coefficient applied in air-fuel ratio feedback control, based on the concentration of a specific component in exhaust gases emitted from the engine, calculates a first learned value of the air-fuel ratio correction coefficient during execution of the air-fuel ratio feedback control, and controls the purge control valve such that the flow rate of the evaporative fuel is changed according to the calculated first learned value. A second learned value of the air-fuel ratio correction coefficient suitable for the transient operating condition of the engine is calculated.

Abstract: A voltage comparing circuit has a current pass forming circuit connecting the one main terminals of a first and second field effect transistors which input two input signal voltages on their control terminals, respectively. The current pass forming circuit, respond to the voltage difference between the two input signals, forms an instantaneous current pass between the one main terminals of the first and second transistors to cancel out the charging and discharging current of the associated transistors.

Abstract: The invention is provided with a load detecting means for detecting the value of an electric load connected to an electric generator driven by an internal combustion engine. An idling speed-up means stepwise increases an idling speed of the engine. A control means causes the idling speed-up means to operate when the detected value of the electric load continuously remains above a predetermined value for a predetermined length of waiting time. The control means is provided with a variable setting means which variably sets the waiting time in such a manner that the larger the detected value of the electric load, the shorter the length of the waiting time.