Mower using exhaust gas turbocharging auxiliary device

Abstract

The invention relates to a lawn mower adopting an exhaust gas turbocharging auxiliary device. The device includes a gas outlet pipe sealed and communicated with a rear intake pipe and a gas introduction pipe sealed and communicated with an exhaust pipe. There is a flow control device sealingly connected between the adjacent ends of the tubes. The flow control device is controlled by the accelerator pedal on one side. When the accelerator pedal is released, the flow control device is suitable for introducing an appropriate amount of gas from the gas outlet pipe to the gas inlet pipe; loosen the accelerator pedal When pedaling, the compressed gas in the rear intake pipe is directly introduced into the exhaust pipe through the pipeline and the flow control device, and the flow control device adjusts the amount of gas introduced according to the speed of the accelerator pedal; The speed sends a proper amount of outside air into the front intake pipe; the power of the engine is immediately weakened with the relaxation of the accelerator pedal, reducing the time lag of the turbo.

Description

technical field [0001] The invention relates to an exhaust gas turbocharging auxiliary device, a lawnmower using the device (especially a riding lawnmower using a gasoline or diesel engine) and a method for reducing turbo time lag, which can reduce the turbo time lag effect . Background technique [0002] At present, as people's awareness of environmental protection increases, fuel-efficient and powerful engines are becoming more and more popular, and small-displacement exhaust gas turbocharged engines have become the main equipment on today's vehicles. However, the exhaust gas turbocharger has a time-lag effect, because the supercharging effect of the exhaust gas turbocharger is mainly generated by the intake turbine located in the intake passage, and the intake turbine is driven by the exhaust turbine located in the exhaust passage, The speed of the exhaust turbine is determined by the exhaust pressure of the engine. When the driver suddenly steps on the accelerator to ac...

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Problems solved by technology

[0003] Existing exhaust gas turbochargers are generally installed before the throttle valve. When the driver suddenly releases the accelerator pedal, the opening of the throttle valve will decrease synchronously. If the accelerator pedal is completely released, the opening of the throttle valve will become the minimum. , at this time the engine will be in the idling state. Before the throttle opening decreases, the engine power is strong, and the speed of the intake and exhaust turbines is high. However, due to the rotational inertia of the turbine, when the throttle opening suddenly decreases, , the speed of the intake turbine will not decrease rapidly, and the pumping effect of the intake turbine will not weaken rapidly. Since the opening of the throttle valve becomes smaller, the resistance of the gas passing through the throttle increases, so the exhaust gas turbocharging The air pressure in the rear air intake pipe between the valve and the throttle valve will rise rapidly. If the opening of the throttle valve suddenly decreases to idle speed, the excessive air pressure will damage the throttle valve assembly or cause air leakage in the pipe.

In the prior art, a turbocharger pressure relief valve is generally installed, and its function is to discharge the air in the above-mentioned pipeline into the outside when the air pressure in the above-mentioned rear intake pipe exceeds the set value of the pressure relief valve, thereby protecting Throttle valve or pipe, however, the part of the gas with a certain pressure that is discharged into the outside world is not fully utilized

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