15 results about "Exhaust brake" patented technology

This specification discloses an exhaust braking control method, system, computing device, storage medium, and vehicle. In this method, when a hybrid vehicle is operating on a long downhill slope and the generator set enters a power-consuming state, the engine is put into in-cylinder braking or exhaust braking mode, and the generator is in speed mode. In the control of the generator's target speed, a torque limit calculated by mechanical power is added. This torque limit restricts the integral part of the speed loop and the proportional-integral sum in the generator control, improving the power response of the generator's exhaust braking and avoiding excessive overshoot. By having the generator drive the engine to consume excess feedback energy, the battery charge can be dynamically adjusted, ensuring that the feedback energy generated during drive auxiliary braking does not lead to overcharging, and also ensuring the auxiliary braking of the drive motor, thereby improving vehicle driving safety.

The present application relates to a kind of vehicle and its regenerative braking auxiliary control method and system, belong to new energy regenerative braking system and engine exhaust brake technical field.The present application obtains regenerative braking request power and battery allowed recharging power when vehicle braking, when regenerative braking request power is greater than or equal to battery allowed recharging power, engine exhaust brake power and drive motor regenerative braking power are determined according to the difference between regenerative braking request power and battery allowed recharging power, drive motor is controlled according to the determined regenerative braking power to carry out regenerative braking, and exhaust brake valve is closed, by controlling generator to drag engine, so that engine speed reaches the speed value corresponding to the engine exhaust brake power, the method can solve the problem of insufficient regenerative braking caused by the limited battery recharging capacity when vehicle is full or battery low temperature, avoid braking feeling inconsistency and regenerative braking failure when long downhill and other problems.

The application belongs to the field of engine control, and discloses a control method for exhaust brake pressure maintenance, an engine and a vehicle, which are applied to an engine system, wherein an air inlet manifold of the engine system is respectively connected with an outlet of a compressor and an inlet of a cylinder, a throttle valve is arranged on an upstream of the air inlet manifold, an exhaust manifold is respectively connected with an outlet of the cylinder and an inlet of a turbine, an exhaust brake valve is arranged downstream of the turbine, an engine control unit is electrically connected with the turbocharger, the throttle valve and the exhaust brake valve, and the method comprises the following steps: S1, a main charge model, i.e., a dynamic exhaust manifold pressure model, is established, and the intake and exhaust are calculated by two sets of equations; S2, the main charge model is corrected; and S3, closed-loop control of a target exhaust manifold pressure is performed. Through the designed algorithm, the maximum braking power is maintained during exhaust braking by combining the transient prediction algorithm with the closed-loop control of the intake flow, and the engine components are prevented from being damaged by the excessively high exhaust pressure under the transient working condition.

1. The name of the design product: controllable tail of the locomotive platform host. 2. The use of the design product: with controllable tail of the host, tail control box, with train tail wind pressure query, exhaust brake, low wind pressure alarm and other functions. 3. The design points of the design product: in the perspective. 4. The picture or photo that can best show the design points: perspective.

The invention relates to an exhaust brake electromagnetic valve. According to the electromagnetic valve, a main gas circuit unit, a proportional electromagnetic driving structure, a gas circuit switching structure and a gas pressure detection structure are integrated. Continuous and linear accurate adjustment of output air pressure is realized through a proportional electromagnetic driving structure; the gas path switching structure can intelligently switch gas flow between the first gas outlet and the second gas outlet according to an instruction; the pressure sensor integrated in the valve body monitors the actual output air pressure in real time, closed-loop feedback control is formed, and accurate matching of braking force is ensured. The system is compact in structure, remarkably reduces external pipelines and leakage points, has the advantages of being rapid in response, accurate in control, high in reliability and high in adaptability, and remarkably improves the smoothness and safety of vehicle braking.

The application discloses an exhaust brake valve sticking diagnosis method, device, equipment, storage medium and product. The method comprises the following steps: when it is detected that the vehicle engine is successfully started, the engine speed and the current vehicle working condition in a preset time period are acquired; if it is determined that the preset first exhaust brake valve sticking judgment condition is met according to the engine speed and the current vehicle working condition, the exhaust brake valve is controlled to enter an inspection state, and the opening and closing state of the exhaust brake valve is controlled in the inspection state, and the maximum fuel injection amount and the minimum fuel injection amount of the exhaust brake valve in the opening and closing state are detected; the fuel injection amount deviation is determined according to the maximum fuel injection amount and the minimum fuel injection amount; the sticking diagnosis result of the exhaust brake valve is determined according to the fuel injection amount deviation, and the vehicle control strategy is generated according to the sticking diagnosis result. The technical scheme of the embodiment of the application improves the sticking diagnosis reliability and accuracy of the exhaust brake valve.

The invention discloses a method for monitoring exhaust brake pressure of an engine, relates to the technical field of exhaust brake of internal combustion engines, and solves the technical problem that the existing exhaust brake test mode cannot effectively detect exhaust brake butterfly valves of engines produced in batches to cause valve faults. The method comprises the steps that actually-measured pressure values after EGR cooling under different engine working conditions are obtained, an exhaust braking pressure calculation value is obtained through calculation according to the actually-measured pressure values after EGR cooling, and when the exhaust braking pressure calculation value is smaller than a preset exhaust braking pressure threshold value, the exhaust braking function of the engine is normal. According to the invention, efficient utilization of resources is realized, and the maintenance cost is reduced.

The utility model discloses exhaust brake vehicle performance test equipment, and relates to the field of exhaust equipment. The exhaust brake vehicle performance test equipment comprises an engine, an exhaust unit, an air storage unit and a data processor, the exhaust unit is connected with the engine, the exhaust unit comprises an exhaust brake valve and an air pressure sensor, the exhaust brake valve is used for opening and closing an engine exhaust channel, the air pressure sensor is installed on the exhaust brake valve, and the air storage unit is connected with the data processor. And the air pressure sensor is used for detecting the back pressure of the exhaust channel. According to the exhaust brake whole vehicle performance test equipment, the air pressure sensor is directly installed on the exhaust brake valve, the back pressure of an exhaust channel can be accurately detected in real time, data are transmitted to the data processor to be displayed, and a tester can visually know the working state of an exhaust brake system conveniently. And a plurality of selectable air leakage holes are formed in the disc, so that the air leakage holes with proper hole diameters and quantity can be selected for exhausting according to different test requirements.

This utility model proposes an exhaust structure for an exhaust brake control cylinder, including a cylinder body with a piston chamber inside. The front end of the cylinder body has a connecting hole that communicates with and penetrates the piston chamber. The outer diameter of the cylinder body segment corresponding to the piston chamber is larger than the outer diameter of the segment corresponding to the connecting hole. The two cylinder body segments are connected by an inclined plane. An exhaust hole penetrating the inclined plane is provided on the bottom surface of the piston chamber near the connecting hole. Two ends of a cover are respectively wrapped around the outer walls of the two cylinder body segments. The cover has through holes with filters installed at the through holes. A cover is installed at the exhaust hole of the cylinder body, forming an air chamber between the cover and the outer wall of the cylinder body. The cover has through holes with filters installed at the through holes, thus forming an air path of outside—through hole—air chamber—exhaust hole—piston chamber. The filter prevents external debris from entering the piston chamber.

Systems and methods are disclosed for braking of a vehicle in response to a deceleration request. A fuel pump operates to pressurize the fuel system in response to the deceleration request to apply additional torque to the powertrain to brake the vehicle. The fuel pump can be operated as a primary means of braking the vehicle, or to supplement one or more other means of braking the vehicle, such as service brakes, engine brakes, exhaust brakes, regenerative braking, resistive braking, and / or aerodynamic braking.

The utility model relates to the technical field of brake valves, in particular to an exhaust brake valve which comprises an exhaust pipe body and a mounting box, the mounting box is mounted on the upper side of the exhaust pipe body, a fixing ring plate is mounted in the exhaust pipe body, an operating cylinder is mounted on the rear side in the mounting box, and locking mechanisms are arranged on the two sides of the front end of the operating cylinder. The locking mechanism comprises a driving part and gas baffles, the driving part drives the gas baffles on the bottom side to rotate, two sets of fixing frames at the bottom end of the exhaust pipe body are connected with extending blocks at the bottom end of the mounting box through bolts, and through the design, stability can be further improved, and deviation can be prevented; the two-way rack plate at the front end of the control cylinder is meshed with the two locking mechanisms for relative movement, the abrasion degree can be reduced through the design, the service life is greatly prolonged, and the production cost is greatly reduced.

The invention relates to an internal combustion engine (10) for a motor vehicle, comprising an exhaust brake (12) for braking the internal combustion engine (10) by building up exhaust back pressure and a decompression brake (14) for braking the internal combustion engine (10) by decompressing cylinder pressure built up during a compression stroke of a cylinder of the internal combustion engine (10). The exhaust brake (12) and the decompression brake (14) can be operated independently of each other, preferably such that the internal combustion engine (10) can be braked selectively either by means of the exhaust brake (12), by means of the decompression brake (14), or simultaneously by means of the exhaust brake (12) and the decompression brake (14).

The application relates to a double-channel pressure-limiting exhaust brake device, which comprises a valve body assembly, a support assembly and a cylinder assembly; the valve body assembly comprises a valve body, a butterfly piece, a supporting sleeve and a pressure-limiting assembly; the pressure-limiting assembly comprises a valve core; the valve core comprises a small steel ball, a valve rod, a low-pressure spring and an adjusting screw; a second air inlet connected with a central hole and a second air outlet are formed in the rod wall of the valve rod; a third step C is formed at the connection position between the second air inlet and the inner wall of the valve rod central hole; the small steel ball is arranged at the third step C in the valve rod; one side of the small steel ball is tangent to a conical surface with an angle alpha at the third step C; the low-pressure spring is arranged in the valve rod; and the two ends of the low-pressure spring are connected with the small steel ball and the adjusting screw respectively. The application has the advantages of compact structure, convenient production and assembly, higher reliability and longer service life.

An exhaust brake valve assembly includes a valve housing, an actuation mechanism, and a butterfly assembly. The valve housing defines a flow passage and a housing bore extending transverse to the flow passage. The actuation mechanism includes a pneumatic actuator, a rod reciprocated by the pneumatic actuator, a bearing coupled to the rod for reciprocation therewith, and a crankshaft coupled to the bearing. The butterfly assembly includes a bushing received in the housing bore, a shaft extending through the bushing, and an elliptical butterfly member supported in the flow passage. The bushing aligns the shaft with the housing bore. The butterfly member is pivotable with the shaft to adjust a flow of gas through the flow passage.

The present application relates to a kind of exhaust brake solenoid valve, the solenoid valve integrates main gas path unit, proportional electromagnetic drive structure, gas path switching structure and gas pressure detection structure in one body.Continuous, linear accurate regulation to output gas pressure is realized by proportional electromagnetic drive structure;Gas path switching structure can switch intelligently according to instruction between first and second gas outlet;Pressure sensor integrated in valve body monitors actual output gas pressure in real time, and forms closed-loop feedback control, to ensure that braking force is accurately matched.The present application has compact structure, significantly reduces external pipeline and leakage point, has the advantages of rapid response, accurate control, high reliability, strong adaptability, significantly improves the smoothness and safety of vehicle braking.