CN201228591Y

CN201228591Y - Engine discharging brake

Info

Publication number: CN201228591Y
Application number: CNU2008201175484U
Authority: CN
Inventors: 李瑞强
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-06-23
Filing date: 2008-06-23
Publication date: 2009-04-29
Anticipated expiration: 2018-06-23

Abstract

The utility model relates to an engine leakage brake which comprises a shell 01, a solenoid valve 02, a one-way valve, piston components 03 and an exhaust valve 04. The engine leakage brake is characterized in that the piston components comprises a piston sleeve 32, an executing piston 33, a return spring 34 and a piston blanking cover 36, wherein the piston sleeve 32 can be freely and vertically moved in a piston cavity 14 and is pressed at the bottom part of the piston cavity 14 through a compression spring 22, the initial position of the piston sleeve 32 is adjusted by an adjusting screw 09, and after the adjustment, a locking nut 10 is locked in the adjusting position; the executing piston 33 can be freely and vertically moved in the inner cavity of the piston sleeve, and is pressed at the bottom end of the piston sleeve through a compression spring 34, the motion area of the executing piston is gap H between the executing piston 33 and the piston blanking cover 36, and the executing piston 33 is aligned with the exhaust valve 04; meanwhile, an oil drainage hole 08 is additionally arranged; the utility model is kept open by controlling the exhaust valve, and the opening amplitude can be automatically adjusted along with the rotational speed difference of the engine. Therefore, the power generated by the gas in the combustion chamber to the piston can be reduced maximally, the rotational speed of the engine and the speed of the entire vehicle are reduced, the braking performance is enhanced, and the travel safety is improved.

Description

Gas bleed brake of engine

Technical field

The utility model belongs to motor car engine auxiliary braking field, is specifically related to the disappointing braking device of a kind of motor car engine.

Technical background

Retarder is a kind of complemental brake system of vehicle (particularly heavy truck and motorbus), use complemental brake system can strengthen the vehicle braked performance, need not use or use less foundation brakes (traditional friction brake) just vehicle can be controlled in certain safety speed scope, the prevention car brakeing is malfunctioning, guarantee traffic safety, the Security when particularly strengthening the heavy-duty vehicle lower long slope.Use retarder can reduce the frequency of utilization of main Service Brake (friction brake) significantly simultaneously, thereby reduce the wearing and tearing of foundation brakes braking hub and friction plate, improve its working life, prolong the service cycle of foundation brakes simultaneously, reduce maintenance cost, improve the Security and the travelling comfort of driving, reduce driver's fatigue, increase work efficiency.

Along with the speed of a motor vehicle of present vehicle is more and more higher, carrying capacity is increasing, requirement to automobile brake perfrmance is also more and more higher, increasing vehicle especially load-carrying lorry all has been equipped with exhaust braking, but single exhaust braking does not often satisfy the requirement to big braking force, and a kind of engine braking apparatus that gas bleed brake of engine is worked simultaneously with exhaust brake just, it can be converted into braking force with the kinetic energy that advances of automobile, further improve the braking force of car load, improve travel safety.

The model utility content

Brake hypodynamic problem at existing exhaust braking, the disappointing braking device of the motor that provides a kind of kinetic energy that automobile can be advanced to be converted into braking force is provided the purpose of this utility model, further improves the braking force of car load.

For achieving the above object, the utility model adopts following technological scheme:

A kind of gas bleed brake of engine, comprise housing 01, solenoid valve 02, one-way valve, piston assembly 03 and exhaust valve 04, it is characterized in that piston assembly by piston sleeve 32, carry out piston 33, return spring 34 and piston blanking cover 36 and form, wherein piston sleeve 32 can freely move up and down in piston cavity 14, and be pressed in the bottom of piston cavity 14 by a pressure spring 22, its initial position is regulated by an adjusting screw 09, and adjusting finishes, and is locked in adjusted position by a locking nut 10.

Carrying out piston 33 can freely move up and down in the inner chamber of piston sleeve, and is pressed in the bottom of piston sleeve by a pressure spring 34, carries out between the motor area of piston to carrying out the gap H of piston 33 and piston blanking cover 36, carries out piston 33 and aims at exhaust valves 04;

One-way valve is made up of a ball valve 06 and pressure spring 05, thereby lubricant oil can only one-way flow during the system works that makes;

Processing one draining hole 08 passes to the engine lubrication oil sump on housing;

The piston 23 of solenoid valve 02 is a bidirectional piston, during the solenoid valve energising, piston 23 moves down, lubricant oil just flow through solenoid valve and one-way valve, give system's fuel feeding, when solenoid valve 02 outage, piston 23 is return under the effect of return spring 21, and the lubricant oil in the whole device just flows back to the lubricating oil bath of motor via return opening 12, piston 23 and return opening 13;

The working medium of whole device is the low pressure lubricant oil of engine lubrication oil sump, and lubricant oil is at one-way valve and carry out between the piston mobile.

The utility model and exhaust braking are used, stay open by the control exhaust valve, and the amplitude of opening can be adjusted automatically with the difference of engine speed, thereby can reduce gas in the firing chamber to greatest extent to the piston work, reduce engine speed and car load speed, improve braking ability, improved travel safety.

Description of drawings

Fig. 1: the utility model structural representation;

Fig. 2: the detailed structure view of piston assembly.

Embodiment

Below in conjunction with accompanying drawing the utility model is described further.

As shown in Figure 1, this gas bleed brake of engine mainly is made up of housing 01, solenoid valve 02, one-way valve 06, adjusting screw 09 and piston assembly 03, wherein one-way valve is a ball valve, and is pressed on the valve seat by a pressure spring 05, lubricant oil can only be flow to and oil circuit outflow from then on.Be oil duct between solenoid valve 02 and one-way valve and the piston assembly 03; The initial position of piston assembly 03 is regulated by adjusting screw 09, and the switch of solenoid valve is controlled by control system, is used with motor.

When vehicle need slow down, give solenoid valve 02 energising, the piston 23 of solenoid valve moves down, low pressure lubricant oil just enters the inner chamber of piston assembly successively by filler opening 11, piston 23, ball valve 06, oil duct 07, thereby promoting to carry out piston 33 moves down, up to running into exhaust valve 04, but this moment lubricant oil pressure also be not enough to open exhaust valve 04.When exhaust valve 04 when exhaust stroke is opened, under the effect of lubricating oil pressure, carry out piston 33 and continue to move down according to the stroke of design, this moment, exhaust valve was opened.After exhaust stroke finishes, exhaust valve 04 has the trend of cutting out under the effect of exhaust valve spring, this moment, ball valve 06 was closed oil inlet hole under the effect of return spring 05, so just, between oil duct 07 and execution piston 33, formed the zone of high pressure, stop to carry out on the piston and move, keep the exhaust valve maintenance to open, thereby reveal the compressed mixed gas in the firing chamber, make few energy return engine piston, and rely on the back pressure of exhaust braking generation to increase the intake and exhaust power consumption, to increase braking force.Simultaneously because the existence in draining hole 08, after exhaust valve was opened, along with remaining in operation of motor, draining was continued in draining hole 08, the exhaust valve 04 that will make progressively lowers Lift, enter compression stroke up to motor, in compression stroke, the Lift of exhaust valve 04 continues to reduce, formed Lift carries out throttling to the indoor pressurized gas of engine combustion and is discharged in the gas exhaust piping, so far finish a circulation, motor remains in operation, and then carries out next one braking circulation.

When the needs brake off, cut off the power supply to solenoid valve, the piston 23 of solenoid valve return under the effect of return spring 21, this moment, filler opening was closed, spill port 12 is communicated with spill port 13 by piston 23, and just flow through successively oil duct 32, oil duct 07, oil duct 12, piston 23 and spill port 13 of extreme pressure lubricant flows back to the engine lubrication oil sump at this moment.This moment, all parts of gas bleed brake of engine all disengaged with exhaust valve, and motor enters normal acting pattern.

Claims

1, a kind of gas bleed brake of engine, comprise housing (01), solenoid valve (02), one-way valve, piston assembly (03) and exhaust valve (04), it is characterized in that piston assembly by piston sleeve (32), carry out piston (33), return spring (34) and piston blanking cover (36) and form, wherein piston sleeve (32) can freely move up and down in piston cavity (14), and be pressed in the bottom of piston cavity (14) by a pressure spring (22), its initial position is regulated by an adjusting screw (09), adjusting finishes, and is locked in adjusted position by a locking nut (10);

Carrying out piston (33) can freely move up and down in the inner chamber of piston sleeve (14), and be pressed in the bottom of piston sleeve (32) by a pressure spring (34), the stroke of carrying out piston (33) is carried out piston (33) and is aimed at exhaust valve (04) for carrying out the gap H of piston (33) and piston blanking cover (36);

One-way valve is made up of a ball valve (06) and pressure spring (05), thereby lubricant oil can only one-way flow during the system works that makes;

The piston (23) of solenoid valve (02) is a bidirectional piston, during the solenoid valve energising, piston (23) moves down, lubricant oil just flow through solenoid valve and one-way valve, give system's fuel feeding, when solenoid valve (02) cut off the power supply, the lubricant oil in piston (23) return under the effect of return spring (21), whole device just flowed back to the lubricating oil bath of motor via return opening (12), piston (23) and return opening (13);

2, gas bleed brake of engine according to claim 1 is characterized in that: whole device can be made integrated type or split type as required.

3, gas bleed brake of engine according to claim 1 is characterized in that: ball valve adopts a steel ball.

4, gas bleed brake of engine according to claim 1 is characterized in that: increased by a draining hole (08).

5, gas bleed brake of engine according to claim 1 is characterized in that: gap H guarantees by carrying out piston (33) and piston blanking cover (36).

6, gas bleed brake of engine according to claim 1 is characterized in that: adopt a cylinder back-up ring (35) fixing between piston blanking cover (36) and the piston sleeve (32), and the face that piston blanking cover (36) contacts with cylinder back-up ring (35) is a conical surface.