CN216278068U - In-cylinder brake type automobile engine - Google Patents
In-cylinder brake type automobile engine Download PDFInfo
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- CN216278068U CN216278068U CN202123167876.XU CN202123167876U CN216278068U CN 216278068 U CN216278068 U CN 216278068U CN 202123167876 U CN202123167876 U CN 202123167876U CN 216278068 U CN216278068 U CN 216278068U
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Abstract
The utility model discloses an in-cylinder brake type automobile engine, and belongs to the technical field of automobile braking. The system comprises a group of cylinders of an in-cylinder brake type automobile engine, an air inlet pipe of the in-cylinder brake type automobile engine, an exhaust pipe of the in-cylinder brake type automobile engine, an air inlet of each cylinder and an air outlet of each cylinder, wherein the air inlet and the air outlet of each cylinder are respectively communicated with the air inlet pipe and the exhaust pipe in sequence from the front end port of the air inlet pipe to the rear end port of the exhaust pipe; the intake and exhaust circulating pressurization control device comprises a controller, an execution element and an intake and exhaust circulating pressurization pipe, wherein the execution element comprises an intake pipe opening and closing automatic control valve, a circulating pressurization pipe opening and closing automatic control valve and an exhaust pipe front end throttling automatic control valve; the intake-exhaust cycle supercharging control device forms an exhaust passage of the supercharging cylinder into an intake passage of the brake cylinder, so that the brake cylinder generates additional automobile running resistance in the compression stroke. The brake has the characteristics of reasonable structure, good braking performance, high safety and reliability and the like.
Description
Technical Field
The utility model relates to the technical field of automobile braking.
Background
The problem of speed control of an automobile during downhill is solved, particularly, a truck has the problem that potential energy is required to be effectively reduced when the truck is in heavy load and the potential energy is contained during downhill, and if the truck is controlled by only using a brake pad to consume the potential energy, a brake pot is overheated during the friction (potential energy conversion) process of the brake pad for a long time, so that dangerous situations such as tire ignition, brake failure and the like are easy to occur. Most large trucks are provided with exhaust brakes, so that the problem is relieved to a certain extent, the effect is not ideal, at present, the advanced exhaust valve brake (such as an Weichai WEVB exhaust valve brake system) has ideal brake effect, but under the conditions of heavy trucks and steep slopes, the brake force is still insufficient, and the driving safety is influenced to a certain extent.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of providing an in-cylinder brake type automobile engine which has the characteristics of reasonable structure, good brake performance, high safety and reliability and the like.
In order to solve the technical problems, the technical scheme adopted by the utility model is as follows:
an in-cylinder brake type automobile engine comprises a group of cylinders of the in-cylinder brake type automobile engine, an air inlet pipe of the in-cylinder brake type automobile engine and an exhaust pipe of the in-cylinder brake type automobile engine, wherein an air inlet of each cylinder and an air outlet of each cylinder are respectively communicated with the air inlet pipe and the exhaust pipe in sequence from the front end port of the air inlet pipe to the rear end port of the exhaust pipe;
the intake and exhaust circulating pressurization control device comprises a controller, an execution element and an intake and exhaust circulating pressurization pipe, wherein the execution element comprises an intake pipe opening and closing automatic control valve, a circulating pressurization pipe opening and closing automatic control valve and an exhaust pipe front end throttling automatic control valve; the air inlet pipe opening and closing automatic control valve is arranged on the air inlet pipe and is positioned between the air inlets of any two adjacent cylinders, the air inlet pipe opening and closing automatic control valve is used as a boundary, the cylinder positioned at the front end of the air inlet pipe opening and closing automatic control valve is a supercharging cylinder, and the cylinder positioned at the rear end of the air inlet pipe opening and closing automatic control valve is a braking cylinder; the air inlet pipe positioned at the front end of the air inlet pipe opening and closing automatic control valve is a front-section air inlet pipe, and the air inlet pipe positioned at the rear end of the air inlet pipe is a rear-section air inlet pipe; the front end throttle automatic control valve of the exhaust pipe is arranged on the exhaust pipe and is positioned at the front end of the exhaust port of the pressure cylinder at the forefront end, the air inlet port of the air inlet and exhaust circulation pressure increasing pipe is communicated with the exhaust pipe and is positioned at the rear end of the front end throttle automatic control valve of the exhaust pipe, the exhaust port of the air inlet and exhaust circulation pressure increasing pipe is communicated with the air inlet pipe and is positioned at the rear end of the air inlet pipe opening and closing automatic control valve, and the circulation pressure increasing pipe opening and closing automatic control valve is arranged on the air inlet and exhaust circulation pressure increasing pipe; the exhaust pipe positioned at the rear end of the throttle self-control valve at the front end of the exhaust pipe is a rear-section exhaust pipe;
the controller is used for receiving an in-cylinder brake starting control signal, and the in-cylinder brake starting control signal is a starting control signal of an in-cylinder brake type automobile engine auxiliary brake device so as to control the in-cylinder brake type automobile engine to be converted from a fuel oil working state into an in-cylinder brake working state;
the signal output end of the controller outputs a brake cylinder pressurization control signal to control the action of each executing element, and the in-cylinder brake type automobile engine is switched to a synergistic brake working state: the opening and closing automatic control valve of the air inlet pipe is switched from opening to closing, the opening and closing automatic control valve of the circulating supercharging pipe is switched from closing to opening, and the throttle automatic control valve at the front end of the exhaust pipe is switched from opening to closing, so that the air inlet and exhaust passages of the supercharging cylinder and the braking cylinder are changed: the front-section air inlet pipe forms an air inlet passage of a boosting cylinder, the rear-section exhaust pipe, the air inlet and exhaust circulating supercharging pipe and the rear-section air inlet pipe form an air inlet passage of a braking cylinder, and therefore the air outlet passage of the boosting cylinder forms an air inlet passage of the braking cylinder.
The utility model further improves that:
the number of cylinders of the in-cylinder braking type automobile engine is four, and the number of the supercharging cylinders is one.
The cylinder braking type automobile engine is an automobile engine utilizing WEVB exhaust valve braking technology.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in:
the utility model adds the intake and exhaust circulation supercharging control device in the engine, changes the intake and exhaust passages of the corresponding cylinder after the intake and exhaust circulation supercharging control device is started, divides the cylinder into the supercharging cylinder and the brake cylinder from the function, the exhaust passage of the supercharging cylinder forms the intake passage of the brake cylinder, the supercharging cylinder compresses the air through the exhaust stroke (the supercharging cylinder plays the role of an air compressor at the moment), and then transmits the compressed air to the brake cylinder, thereby improving the air input quantity of the brake cylinder, the air pressure in the cylinder is improved to a great extent during the compression stroke of the brake cylinder, so as to generate larger operation resistance to the piston in the brake cylinder during the compression stroke, and the brake cylinder absorbs more energy during the compression stroke, therefore, during the compression stroke, the brake cylinder in the device can generate additional automobile running resistance compared with the common cylinder brake type automobile engine cylinder. Thereby increasing the running resistance of the automobile and improving the braking performance.
The utility model has the characteristics of reasonable structure, good braking performance, high safety and reliability and the like.
Drawings
Fig. 1 is a schematic structural view of the present invention.
In the drawings: 1. a cylinder; 2. an air inlet pipe; 2-1, a front section air inlet pipe; 2-2, a rear section air inlet pipe; 3. an exhaust pipe; 3-1, a rear section exhaust pipe; 4. an air inlet and exhaust circulating pressurization pipe; 5. the air inlet pipe is provided with an automatic control valve for opening and closing; 6. the automatic control valve for opening and closing the circulating pressure increasing pipe; 7. the front end of the exhaust pipe is provided with a throttle automatic control valve.
Throttling automatic control valve: one of the two-position type automatic control valve has two working states of opening and closing, the valve is controlled by driving the valve core to move relative to the valve seat through electric, pneumatic, hydraulic or electromagnetic driving, when the throttle automatic control valve is in the opening state, a channel is formed between the valve core and the valve seat, when the throttle automatic control valve is in the closing state, the valve core and the valve seat are not completely closed, but a certain throttle section or a throttle hole exists to throttle the fluid, so that a pressure difference is formed between the front end and the rear end of the valve, for example, an exhaust brake valve.
The utility model relates to an in-cylinder brake type automobile engine, which is an automobile engine with in-cylinder brake function in the prior art, an auxiliary brake device is added in the engine, when an automobile electronic control system receives an in-cylinder brake starting control signal, the automobile electronic control system controls an oil supply control device to act to stop supplying oil to the in-cylinder brake type automobile engine, so that the in-cylinder brake type automobile engine stops fuel oil to do work, meanwhile, the automobile electronic control system controls the in-cylinder brake type automobile engine auxiliary brake device to act to convert an engine generating power into an energy-absorbing air compressor, the conversion can open an exhaust valve when the compression stroke of an engine piston is close to the end to allow compressed air to be released, and the energy absorbed by the compressed air in the compression stroke of the engine cannot return to the piston of the engine in the subsequent expansion stroke, but is dissipated through the exhaust and heat dissipation system of the engine to produce effective engine braking, slow the speed of the vehicle, help heavy trucks or buses to control the vehicle to decelerate when continuously descending downhill, and safely and quickly pass through long distance downhill sections, for example, a Weichai automobile engine utilizing WEVB exhaust valve braking technology.
Detailed Description
The utility model will be described in further detail below with reference to the figures and specific examples.
The standard parts used in the utility model can be purchased from the market, the special-shaped parts can be customized according to the description and the description of the attached drawings, and the specific connection mode of each part adopts the conventional means of mature bolts, rivets, welding, sticking and the like in the prior art, and the detailed description is not repeated.
As can be seen from the embodiment shown in FIG. 1, the present embodiment comprises a group of cylinders 1 of an in-cylinder brake type automobile engine, an air inlet pipe 2 of the in-cylinder brake type automobile engine and an exhaust pipe 3 of the in-cylinder brake type automobile engine, wherein each cylinder air inlet and each cylinder air outlet are respectively communicated with the air inlet pipe 2 and the exhaust pipe 3 in a front-back order from an outer port of the air inlet pipe 2 to an outer port of the exhaust pipe 3, and the present embodiment further comprises an air inlet and exhaust circulating supercharging control device;
intake and exhaust circulation pressure boost controlling means includes the controller, and execute component and intake and exhaust circulation pressure boost pipe 4, execute component include intake pipe switching automatic control valve 5 (model: ZCN-100FS ], and a circulation pressure increasing pipe opening and closing automatic control valve 6 (type: ZCN-100FS ] and an exhaust pipe front end throttling automatic control valve 7 (adopting an exhaust brake valve, the model is as follows: KE 3003541010-KE 300; the air inlet pipe opening and closing automatic control valve 5 is arranged on the air inlet pipe 2 and is positioned between the air inlets of any two adjacent cylinders, the air inlet pipe opening and closing automatic control valve 5 is used as a boundary, the cylinder 1 positioned at the front end of the air inlet pipe opening and closing automatic control valve is a supercharging cylinder, the cylinder 1 positioned at the rear end of the air inlet pipe opening and closing automatic control valve is a braking cylinder, namely, at least one supercharging cylinder and at least one braking cylinder are arranged; the air inlet pipe 2 positioned at the front end of the air inlet pipe opening and closing automatic control valve 5 is a front section air inlet pipe 2-1, and the air inlet pipe 2 positioned at the rear end of the air inlet pipe is a rear section air inlet pipe 2-2; the front end throttle automatic control valve 7 of the exhaust pipe is arranged on the exhaust pipe 3 and is positioned at the front end of the exhaust port of the pressure cylinder at the forefront end, the air inlet port of the air inlet and exhaust circulation pressure increasing pipe 4 is communicated with the exhaust pipe 3 and is positioned at the rear end of the front end throttle automatic control valve 7 of the exhaust pipe, the air outlet port of the air inlet and exhaust circulation pressure increasing pipe 4 is communicated with the air inlet pipe 2 and is positioned at the rear end of the air inlet pipe opening and closing automatic control valve 5, and the circulation pressure increasing pipe opening and closing automatic control valve 6 is arranged on the air inlet and exhaust circulation pressure increasing pipe 4; the exhaust pipe 3 positioned at the rear end of the throttle self-control valve 7 at the front end of the exhaust pipe is a rear-section exhaust pipe 3-1;
the controller is used for receiving an in-cylinder brake starting control signal, and the in-cylinder brake starting control signal is a starting control signal of an in-cylinder brake type automobile engine auxiliary brake device so as to control the in-cylinder brake type automobile engine to be converted from a fuel oil working state into an in-cylinder brake working state;
when the signal input ends of the automobile electronic control system and the controller receive an in-cylinder brake starting control signal, the automobile electronic control system controls the oil supply control device to act so as to stop supplying oil to the in-cylinder brake type automobile engine and enable the in-cylinder brake type automobile engine to stop fuel oil acting, and the automobile electronic control system controls the in-cylinder brake type automobile engine auxiliary brake device to act so as to enable the in-cylinder brake type automobile engine to be converted into an in-cylinder brake working state from the fuel oil working state;
the signal output end of the controller outputs a brake cylinder pressurization control signal to control the action of each executing element, and the in-cylinder brake type automobile engine is switched to a synergistic brake working state: the opening and closing automatic control valve 5 of the air inlet pipe is switched to be closed from opening, the opening and closing automatic control valve 6 of the circulating supercharging pipe is switched to be opened from closing, and the throttling automatic control valve 7 at the front end of the exhaust pipe is switched to be closed from opening, so that the air inlet and exhaust passages of the supercharging cylinder and the braking cylinder are changed: the front-section air inlet pipe 2-1 forms an air inlet passage of a boosting cylinder, the rear-section exhaust pipe 3-1, the air inlet and exhaust circulating boosting pipe 4 and the rear-section air inlet pipe 2-2 form an air inlet passage of a braking cylinder, and therefore the exhaust passage of the boosting cylinder forms an air inlet passage of the braking cylinder;
the air intake and exhaust circulating supercharging control device can be combined with an automobile electronic control system into an integral structure, and a controller of the automobile electronic control system can be compatible with a controller of the air intake and exhaust circulating supercharging control device;
when the engine is running, under the action of the suction stroke of the boosting cylinder, air is sucked into the boosting cylinder from the outer port of the air inlet pipe 2 through the front-section air inlet pipe 2-1 and the air inlet of the boosting cylinder, the air sucked into the boosting cylinder is exhausted to the air inlet passage of the brake cylinder from the air outlet of the boosting cylinder by the piston in the exhaust stroke process of the boosting cylinder, under the throttling action of the throttling automatic control valve 7 at the front end of the exhaust pipe, continuously exhausted air is compressed in an air inlet passage of the brake cylinder to form compressed air, the compressed air is conveyed into the brake cylinder from an air inlet of the brake cylinder to improve the input air pressure of the brake cylinder, thereby improving the air pressure generated by the brake cylinder in the process of compression stroke, increasing the running resistance of the piston, so that the brake cylinder absorbs more energy in the process of compression stroke, and the running resistance of the automobile is increased, thereby improving the braking performance.
The number of cylinders of the in-cylinder braking type automobile engine is four, and the number of the supercharging cylinders is one.
The cylinder braking type automobile engine is an automobile engine utilizing WEVB exhaust valve braking technology.
The working principle is as follows:
the mechanism of increasing the running resistance of the automobile by the in-cylinder braking type automobile engine is as described above: the exhaust valve is opened near the end of the compression stroke of the engine piston to allow the compressed air to be released, and the energy absorbed by the compressed gas during the compression stroke of the engine cannot be returned to the engine piston during the subsequent expansion stroke, but is dissipated through the engine's exhaust and heat dissipation system to produce effective engine braking.
Therefore, the braking force (vehicle running resistance) generated by the in-cylinder brake type vehicle engine is generated by the energy absorbed by the compressed gas during the compression stroke (i.e., the resistance caused by the compressed air to the operation of the piston). The greater the air pressure compressed in the cylinder in the compression stroke, the greater the resistance to the piston operation, and since this air pressure is generated by compressing the air intake amount of the cylinder, the greater the pressure generated in the compression stroke, and the greater the generated running resistance of the vehicle, the better the braking effect.
The device adds an intake and exhaust circulation supercharging control device in the engine, changes the intake and exhaust passages of the corresponding cylinders after the intake and exhaust circulation supercharging control device is started, so that the cylinders are functionally divided into supercharging cylinders and brake cylinders, and the exhaust passages of the supercharging cylinders form the intake passages of the brake cylinders; the booster cylinder compresses the air sucked from the outer port of the air inlet pipe 2 through the exhaust stroke (the booster cylinder plays the role of an air compressor at the moment), and then the compressed air is conveyed into the brake cylinder, so that the air input quantity of the brake cylinder is improved, the air pressure in the cylinder is improved in the compression stroke process of the brake cylinder, and a large running resistance is generated on a piston in the brake cylinder in the compression stroke process, the automobile running resistance is increased, and the brake performance is improved.
The required running resistance of the automobile under the condition of rated load and the maximum slope allowed by a road can be obtained through experiments because the running resistance required by the automobile under the downhill deceleration braking is positively correlated with the weight of the automobile and the downhill slope.
The air input amount of the brake cylinder is the air output amount of the boosting cylinder, and the air quantity of the boosting cylinder depends on the number, the compression ratio and the displacement of the boosting cylinder, and the throttling action (air resistance) of the exhaust pipe front end throttling automatic control valve 7. The automobile engine has four cylinders, six cylinders, eight cylinders, twelve cylinders and the like, so that the required running resistance of the automobile during downhill deceleration braking can be obtained by reasonably selecting the throttle air resistance of the throttle self-control valve 7 at the front end of the exhaust pipe and the quantity ratio of the braking cylinder to the supercharging cylinder through routine experiments, and a satisfactory braking effect is achieved.
Claims (3)
1. The utility model provides an in-cylinder braking formula automobile engine, includes cylinder (1) of a set of in-cylinder braking formula automobile engine, intake pipe (2) and exhaust pipe (3) of in-cylinder braking formula automobile engine, each cylinder air inlet and each cylinder gas vent according to the distance the outer port of intake pipe (2) with the fore-and-aft order of the outer port of exhaust pipe (3) respectively with intake pipe (2) with exhaust pipe (3) intercommunication, its characterized in that: it also includes air intake and exhaust circulating supercharging control device;
the air inlet and exhaust circulating pressurization control device comprises a controller, an execution element and an air inlet and exhaust circulating pressurization pipe (4), wherein the execution element comprises an air inlet pipe opening and closing automatic control valve (5), a circulating pressurization pipe opening and closing automatic control valve (6) and an exhaust pipe front end throttling automatic control valve (7); the air inlet pipe opening and closing automatic control valve (5) is arranged on the air inlet pipe (2) and is positioned between the air inlets of any two adjacent cylinders, the air inlet pipe opening and closing automatic control valve (5) is used as a boundary, the cylinder (1) positioned at the front end of the air inlet pipe opening and closing automatic control valve is a supercharging cylinder, and the cylinder (1) positioned at the rear end of the air inlet pipe opening and closing automatic control valve is a braking cylinder; the air inlet pipe (2) positioned at the front end of the air inlet pipe opening and closing automatic control valve (5) is a front-section air inlet pipe (2-1), and the air inlet pipe (2) positioned at the rear end of the air inlet pipe opening and closing automatic control valve is a rear-section air inlet pipe (2-2); the front-end throttling automatic control valve (7) of the exhaust pipe is arranged on the exhaust pipe (3) and is positioned at the front end of the exhaust port of the supercharging cylinder at the forefront end, the air inlet port of the air inlet and exhaust circulating supercharging pipe (4) is communicated with the exhaust pipe (3) and is positioned at the rear end of the front-end throttling automatic control valve (7) of the exhaust pipe, the air outlet port of the air inlet and exhaust circulating supercharging pipe (4) is communicated with the air inlet pipe (2) and is positioned at the rear end of the air inlet pipe opening and closing automatic control valve (5), and the circulating supercharging pipe opening and closing automatic control valve (6) is arranged on the air inlet and exhaust circulating supercharging pipe (4); the exhaust pipe (3) positioned at the rear end of the throttle automatic control valve (7) at the front end of the exhaust pipe is a rear-section exhaust pipe (3-1);
the controller is used for receiving an in-cylinder brake starting control signal, and the in-cylinder brake starting control signal is a starting control signal of an in-cylinder brake type automobile engine auxiliary brake device so as to control the in-cylinder brake type automobile engine to be converted from a fuel oil working state into an in-cylinder brake working state;
the signal output end of the controller outputs a brake cylinder pressurization control signal to control the action of each executing element, and the in-cylinder brake type automobile engine is switched to a synergistic brake working state: the opening and closing automatic control valve (5) of the air inlet pipe is switched to be closed from opening, the opening and closing automatic control valve (6) of the circulating supercharging pipe is switched to be opened from closing, and the throttling automatic control valve (7) at the front end of the exhaust pipe is switched to be closed from opening, so that the air inlet and exhaust passages of the supercharging cylinder and the braking cylinder are changed: the front-section air inlet pipe (2-1) forms an air inlet passage of the boosting cylinder, the rear-section exhaust pipe (3-1), the air inlet and exhaust circulating supercharging pipe (4) and the rear-section air inlet pipe (2-2) form an air inlet passage of the braking cylinder, and therefore the air outlet passage of the boosting cylinder forms an air inlet passage of the braking cylinder.
2. The in-cylinder brake type automobile engine according to claim 1, characterized in that: the number of the cylinders of the in-cylinder braking type automobile engine is four, and the number of the boosting cylinders is one.
3. An in-cylinder brake type automobile engine according to claim 1 or 2, characterized in that: the cylinder braking type automobile engine is an automobile engine utilizing WEVB exhaust valve braking technology.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123167876.XU CN216278068U (en) | 2021-12-16 | 2021-12-16 | In-cylinder brake type automobile engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123167876.XU CN216278068U (en) | 2021-12-16 | 2021-12-16 | In-cylinder brake type automobile engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216278068U true CN216278068U (en) | 2022-04-12 |
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ID=81056231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123167876.XU Active CN216278068U (en) | 2021-12-16 | 2021-12-16 | In-cylinder brake type automobile engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216278068U (en) |
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2021
- 2021-12-16 CN CN202123167876.XU patent/CN216278068U/en active Active
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