Engine vent brake and braking method thereof

Abstract

The invention relates to a bleeding-type brake for an engine and a braking method thereof. The brake consists of a housing, a solenoid valve, a non-return valve, piston components, an oil passage, an oil intake piston, an oil discharge control valve and a spring seat, wherein the solenoid valve, the non-return valve and the piston components are sequentially arranged on the housing through the oil passage; the oil intake piston is arranged between the non-return valve and the housing; the oil discharge control valve is arranged at the bottom of the oil intake piston; the spring seat is encapsulated at the bottom of the oil discharge control valve. The braking method comprises the following step: (1) the solenoid valve is powered on, an oil intake passage is opened, an oil discharge passage is cut off, engine oil passes through the oil intake passage to press the oil discharge control valve downwards, opens the non-return valve to enter a working cavity and then drives a driving piston to move downwards; (2) when the engine is at the exhaust stroke, an exhaust valve is opened by a rocker, a piston descends untill being stopped by a limit pin, otherwise, the piston descends to prop against the exhaust valve and stops, and the exhaust valve is not opened by the rocker until the engine is at the exhaust stroke; (3) when the exhaust valve returns, the piston prevents the exhaust valve from being closed, and when the exhaust valve is at the compression stroke, as the exhaust valve has an opening degree, the engine is subject to pumping loss so as to realize braking.

Description

Technical field [0001] The invention relates to an engine brake, in particular to an engine vented brake and a braking method thereof. Background technique [0002] CN201110378295.2 discloses an engine brake, and its purpose is to provide an engine brake with long service life, good braking effect, and can effectively improve vehicle driving safety. The technical solution: The engine brake includes a housing (1), a solenoid valve, a one-way valve, and a piston assembly sequentially arranged on the housing (1), and the housing (1) is also provided with a solenoid Oil passage 1 (11) connected to the valve inlet (55), oil passage 2 (12) connecting the solenoid valve outlet (56) and the check valve inlet, and one end connected to the check valve outlet The third oil passage (13), the housing (1) is provided with a cavity, the other end of the third oil passage (13) is in communication with the cavity and the connection point is located at the bottom of the cavity, It is characteriz...

AI Technical Summary

Problems solved by technology

Its weak point is: the brake power of engine and exhaust valve opening degree are not quite stable

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