Bleeding-type brake for engine 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 vent brake and a braking method thereof. Background technique [0002] CN201110378295.2 discloses an engine brake, the purpose of which is to provide an engine brake with long service life, good braking effect, and can effectively improve the driving safety of the vehicle. The technical solution: The engine brake includes a housing (1), an electromagnetic valve, a check valve and a piston assembly sequentially arranged on the housing (1), and the housing (1) is also provided with an electromagnetic Oil passage one (11) connected to the valve oil inlet (55), oil passage two (12) connecting the solenoid valve oil outlet (56) to the oil inlet of the check valve and one end connected to the oil outlet of the check valve Oil passage three (13), the housing (1) is provided with a concave cavity, the other end of the oil passage three (13) communicates with the concave cavity and its connec...

AI Technical Summary

Problems solved by technology

Its shortcomings are: the braking power of the engine and the opening of the exhaust valve are not very stable

Images