The invention discloses an automatic gearbox built-in electronic gear shifting hydraulic
system and a control method thereof. The hydraulic
system comprises a D / N / R gear shifting mechanism, a gear shifting electronic control valve, an executing mechanism, an
oil supply cavity and an oil way, wherein the D / N / R gear shifting mechanism comprises a valve body, a gear shifting valve element, a limitingvalve element, a spring and an end plug, the limiting valve element is provided with a left working position and a right working position, the gear shifting valve element is provided with a left working position, a middle working position and a right working position which correspond to a gear R, a gear N and a gear D respectively, and the gear shifting electronic control valve comprises an electromagnetic switch valve A and an electromagnetic switch valve B. According to the automatic gearbox built-in electronic gear shifting hydraulic
system and the control method thereof, when the D gear is achieved, the electromagnetic switch valve A is closed, when the gear N is achieved, the electromagnetic switch valve A and the electromagnetic switch valve B are opened, when the gear R is achieved, the electromagnetic switch valve A is opened, and the electromagnetic switch valve B is closed, so that automatic D / N / R gear shifting is achieved, the
driving automation degree is improved, the sizeis reduced, the cost is reduced, and the gear shifting reliability is enhanced.