165 results about "Engine braking" patented technology

The invention belongs to the field of vehicle early warning, and particularly relates to a vehicle hidden danger recognition and safety early warning method and device, and the method comprises the following steps: collecting vehicle speed, tire pressure and road condition data, obtaining the states of key parts of an engine and a braking system through combining an OBD system, and achieving the dynamic perception of a whole vehicle; based on a deep learning algorithm, accurately identifying the too short distance of the front vehicle, fatigue driving, overspeed, area deviation, long-term left-occupying driving of a lane, vehicle retrograde driving and abnormal line pressing tracks; through vehicle-mounted OBD data and cloud large model analysis, potential mechanical faults of tire wear and brake pad aging are predicted, and maintenance suggestions are pushed in advance, so that a driver can be reminded of safety, the driving safety is improved, the hidden danger recognition capability is improved, safety preventive warning is performed on hidden dangers, the driving safety is ensured, and the driving safety is improved. Meanwhile, the vehicle can be guided to avoid high-risk or forbidden road sections, and the probability that the vehicle enters a dangerous or forbidden area is reduced.

The utility model relates to the technical field of engine braking, in particular to a reset type rocker arm braking device and a vehicle. The reset type rocker arm braking device comprises a rocker arm, and the second end of the rocker arm is provided with an exhaust cavity, a braking cavity, a one-way valve cavity and a reset cavity; the rocker arm shaft is provided with a first shaft oil duct and a second shaft oil duct. The rocker arm is provided with a first communicating oil duct, a second communicating oil duct, a third communicating oil duct, a fourth communicating oil duct and a fifth communicating oil duct. A blocking piece is arranged in the exhaust cavity, and a communicating channel is arranged on the blocking piece to divide the exhaust cavity into a first sub-cavity and a second sub-cavity which are communicated with each other; the first communicating oil duct is communicated between the first shaft oil duct and the one-way valve cavity, the second communicating oil duct is communicated between the second shaft oil duct and the reset cavity, the third communicating oil duct is communicated between the reset cavity and the second sub-cavity, the fourth communicating oil duct is communicated between the first sub-cavity and the brake cavity, and the fifth communicating oil duct is communicated between the one-way valve cavity and the brake cavity.

A switchable engine brake rocker arm (1) for a valve train of a heavy-duty internal combustion engine is proposed. The engine brake rocker arm (1) has a running surface (4) for a brake lift cam at one longitudinal end (3) on its underside (2) and a valve contact foot (6) at the other longitudinal end (5), and a bearing eye (7) between the longitudinal ends (3, 5). The running surface (4) is part of a pressure piston (8) that is axially movably guided in a bore (9) extending from the underside (2) of the engine brake rocker arm (1) at one longitudinal end (3). A coupling slide assembly (14a) with at least two coupling slides (15, 16) is applied to one longitudinal end (3). The respective guide receptacles (20, 21) of the coupling slides are located in the pressure piston (8) and surrounding shell section (26), the bore (9) of which runs orthogonally to the latter and in a basic circular phase of the brake lift cam. fled to each other,wherein when the coupling slide group (14a) is coupled the brake stroke cam is activated and when the coupling slide group (14a) is uncoupled it is deactivated, wherein a displacement of the coupling slides (15, 16) in one direction is effected by hydraulic means and in the other direction by the force of at least one compression spring means (27a, 27b).

The invention relates to an auxiliary braking constant-speed downhill control method and device, electronic equipment and a storage medium, and belongs to the technical field of vehicle braking. The method comprises the steps that when a vehicle starts an auxiliary braking function, running parameters of the vehicle are obtained, and the total braking force of the vehicle is determined based on the running parameters; the operation parameters comprise load, vehicle speed and gradient; determining a braking mode of the vehicle based on the engine braking force and the total braking force of the vehicle; the braking mode is engine braking, or the braking mode is engine braking and service braking; and controlling the vehicle to go downhill at constant speed based on the braking mode. According to the auxiliary braking constant-speed downhill control method, when the auxiliary braking function of the vehicle is started, the load, the vehicle speed and the gradient of the vehicle are obtained, the total braking force is calculated, traveling braking is supplemented when engine braking is insufficient, and it is guaranteed that the vehicle keeps the constant speed to go downhill by combining engine braking and traveling braking; the braking device can flexibly adapt to different road conditions, improves the braking effect and the driving safety, and is low in cost.

The invention relates to the field of automobile driving, and provides an engine control method and system and electronic equipment. The method comprises the following steps of S1, detecting whether a vehicle is in a reverse towing working condition or not; s2, if the vehicle is in the reverse towing working condition, operation information of a current engine is obtained; the operation information at least comprises an engine fuel oil way state, a gearbox gear shifting state and an engine braking state; s3, based on the engine operation information, whether the vehicle meets a first preset condition or not is judged; and S4, if the vehicle meets the first preset condition, an economic reverse towing control strategy is triggered so as to control the vehicle to run in an economic reverse towing mode. Compared with the prior art, the negative torque of the engine can be effectively reduced under the reverse towing working condition, and the coasting distance of the vehicle is increased.

The invention discloses an auxiliary braking control method and system and a vehicle, and the method is executed by an auxiliary braking controller and comprises the steps that vehicle driving parameters and a vehicle slope state are obtained; and when the vehicle driving parameters meet the preset conditions and the vehicle slope state is in the downhill state, it is judged that the auxiliary brake starting conditions are met, and exhaust brake control and engine brake control are started. According to the auxiliary braking system, the mechanical pump engine can still conduct auxiliary braking under the condition that no ECU exists, it can be ensured that the auxiliary braking function is timely, effectively and reasonably started and stopped, and meanwhile the main braking intervention requirement judgment capacity, the upshift requirement judgment capacity and the overproof engine protection alarm capacity are achieved.

A computer system for controlling a powertrain system of a vehicle, the powertrain system comprising an internal combustion engine connectable to one or more drive wheels, the computer system comprising processing circuitry configured to selectively operate the powertrain system in: a first freewheeling mode; a second freewheeling mode; a coasting mode; and an engine braking mode; wherein the processing circuitry is further configured to: determine vehicle target speed; determine that freewheeling mode condition is fulfilled based on any one of topography data and vehicle data; determine that the powertrain system is operating in either first freewheeling mode or second freewheeling mode; if the powertrain system is operating in first freewheeling mode and an acceleration level fulfills an acceleration level condition, control the powertrain system from first freewheeling mode to the coasting mode; and if the powertrain system is operating in second freewheeling mode, further determine to maintain second freewheeling mode.

The invention discloses a method for reducing the temperature of an oil head of an oil injector and a related device, which are applied to the technical field of engines and comprise the steps of controlling an engine to be in a braking mode in response to an engine braking request, and controlling an engine cylinder in a braking state to be switched to a reverse towing state when detecting that the number of continuous operation times of the engine exceeds a preset revolution number. And oil sprayers corresponding to all the engine cylinders switched to the reverse towing state are sequentially controlled to spray preset oil spraying amount to cool oil sprayer oil heads, and after cooling of all the oil sprayer oil heads is finished, the engine is controlled to restore to the braking mode. After the engine is controlled to be in the braking mode, when it is detected that the number of continuous operation times of the engine exceeds the preset number of revolutions, it is determined that the temperature of the fuel injector head exceeds the temperature limit value, the engine cylinder in the braking state is switched into the reverse towing state, and the single-cylinder fuel injector is controlled to inject a small amount of fuel to cool the fuel injector head; the service life of the fuel injector and the reliability of other parts of the engine are effectively improved.

The invention relates to an internal combustion engine (1) having a cylinder head (3), which is cooled according to a top-down cooling concept, for at least one cylinder (2), the cylinder head having, per cylinder (2), at least one injection device (130) with an injector (13) for directly introducing a fuel into a combustion chamber (12), wherein the cylinder head (3) has at least one lower cooling chamber (8) adjacent to a fire deck (7) and at least one upper cooling chamber (9) spaced apart from the fire deck (7), wherein the upper cooling chamber (9) and the lower cooling chamber (8) are separated from one another by an intermediate deck (10), wherein at least one overflow channel (11, 26) is formed between the upper cooling chamber (9) and the lower cooling chamber (8). In order to enable high engine braking powers and to avoid irregular combustion, it is provided that the injection device (130) is at least partially surrounded by a flow-guiding wall (31) in the region of an opening (16) of the injector (13).

An engine brake rocker arm assembly (RA) comprising: a rocker arm (11) arranged to swing in response to a cam supported by a camshaft so as to press down at least one exhaust valve; a shaft (20) slidably arranged in one end of the rocker arm, the shaft having a first end and a second end opposite the first end, the first end being provided with an engagement portion (16, 21) facing the exhaust valve, the second end being provided with a stroke stop (24). The castellated members (30, 40, 50) comprise anterior teeth adapted to engage with each other such that the capsule is adapted to assume an extended configuration and a contracted configuration, respectively, according to tooth-to-tooth or tooth-to-valley engagement under the action of an actuator (70) adapted to rotate at least one member of the castellated capsule relative to the other, and a rocker arm (60) arranged to bias the castellated members away from each other so as to force the castellated capsule in said extended state and said contracted state, in which the rocker arm comprises a seat (90) filled with oil to define a damping portion capable of damping the stroke stop (24).

Method (200) for controlling a vehicle powertrain (2) during engine braking, performed by a control device (100), wherein the vehicle powertrain (2) comprises: an internal combustion engine (3), a transmission (4) configured to selectively transmit drive torque from the internal combustion engine to drive wheels (7), and Service brakes (10) configured to brake the drive wheels (7); the procedure includes the following step: Activation (S107) of the service brakes (10) for the purpose of reducing the speed of the internal combustion engine (3) when the speed of the internal combustion engine (3) approaches a threshold value (v th ) to shift up the transmission (4), and wherein the step of activating (S107) the service brakes (10) is carried out based on a determination that the acceleration of a vehicle (1) comprising the vehicle powertrain (2) is below a preselected value.

An air intake system for an internal combustion engine and methods of operating the air intake system. The system includes a turbocharger, a supercharger in series with the turbocharger, a first intercooler between the turbocharger and the supercharger, and a second intercooler downstream of the supercharger. The method includes operating the air intake system to support the internal combustion engine in a drive mode by bypassing the supercharger by opening a first throttle valve in a first bypass line and operating the air intake system to support the internal combustion engine in a brake mode by closing the first throttle valve in the first bypass line.

A method of controlling inlet valves and exhaust valves of a cylinder of an internal combustion engine to obtain an engine braking effect is disclosed. The method comprises the steps of preventing at least one exhaust valve of the cylinder from closing completely during a plurality of successive intake, compression, expansion, and exhaust strokes of the cylinder, phase shifting control of at least one exhaust valve and regulating the amount of air being pumped through the cylinder by phase shifting control of at least one inlet valve of the cylinder. The present disclosure further relates to a computer program, a computer-readable medium, a control arrangement, an internal combustion engine, and a vehicle comprising an internal combustion engine.

A synchronizing system in a valvetrain assembly. A first rocker arm comprises a deactivating roller, the deactivating roller configured to be selectively switchable between a latched position and an unlatched position. A second rocker arm comprises an engine brake capsule, the engine brake capsule configured to be selectively translatable between a retracted position and an extended position. A first switching mechanism is arranged in the first rocker arm and configured to move between a first position and a second position to controllably switch the deactivating roller between the latched position and the unlatched position. A second switching mechanism is arranged in the second rocker arm and configured to move between a third position and a fourth position to controllably translate the engine brake capsule between the retracted position and the extended position. A single actuation source is configured to synchronously control (a) movement of the first switching mechanism from the first position to the second position and (b) movement of the second switching mechanism from the third position to the fourth position.

The invention provides a unit braking system. The unit braking system comprises a rotating shaft; the brake disc is fixedly mounted on the rotating shaft; the brake comprises at least one brake plate, and the brake plate is configured to make contact with the brake disc so as to limit rotation movement of the brake disc along with the rotating shaft; the rotating shaft is arranged in the vertical direction, and the brake disc is located at the upper end of the rotating shaft in the vertical direction. The brake maintenance and replacement difficulty can be reduced on the first aspect, meanwhile, a safety hole for maintaining and replacing the brake does not need to be designed in high-strength concrete on the second aspect, and therefore the overall strength of a high-strength concrete building cannot be damaged; and finally, the cost of the high-strength concrete building can be reduced while the structural strength of the high-strength concrete building is ensured.

The present application relates to an engine brake rocker arm, a design method, and a vehicle, and relates to the technical field of engine brake rocker arms. The application includes a rocker arm body, which is rotatably arranged on a rocker arm shaft. The two ends of the rocker arm body are respectively used to abut against a brake cam and a valve assembly, and the rocker arm body is provided with an abutment boss; an elastic retaining mechanism, one end of which is connected to the abutment boss, and the other end is used to connect to the rocker arm shaft or a rocker arm shaft support. The elastic retaining mechanism is used to maintain a gap between the rocker arm body and the brake cam and the valve assembly when the rocker arm body is in a non-braking condition. Because the elastic retaining mechanism maintains a gap between the rocker arm body and the brake cam and the valve assembly when the rocker arm body is in a non-braking condition, the brake rocker arm does not move when the engine is in a non-braking condition, which greatly reduces the frequency of use and the power consumption of the engine. It also solves the problem in the prior art that the bushing of the brake rocker arm is easily side-loaded, which may affect the normal use of the engine.

Pendulum power transmission drive wheel with mechanical recovery of part of the braking energy, developed from a reducer (3) attached to the vehicle suspension. The drive wheel (1) is fixed to the slow shaft (4) of the reducer (3). On the fast shaft (5) on its stub axle, a bearing (7) is fixed from which a swing arm (6) hangs, at the end of which the engine (8) is fixed, which drives the fast shaft (5) by means of a belt transmission (11), chain or gears, forming a pendulum assembly (19). On the arm (6) brake calipers (14) are mounted which, when activated on the disc (13), keep the pendulum assembly (19) raised, by the effect of the engine brake (8), accumulating potential energy. To move the vehicle, the calipers (14) are deactivated and the engine (8) is started simultaneously, recovering part of the braking energy on its descent and facilitating the starting of the engine (8) and the vehicle.

A computer system for controlling an articulated tractor-trailer combination, the computer system comprising processing circuitry configured to determine, based on a received brake request and an estimated value of the road friction (µest), a brake force distribution between motor or engine braking of the tractor, and service braking of the trailer. The processing circuitry is configured to control a torque (Tqtractor) to be applied by the motor or engine in accordance with the determined brake force distribution, determine, independently of the estimated value of the road friction (µest), a longitudinal wheel slip limit for wheels of said drive axle, translate the determined longitudinal wheel slip limit to a wheel speed limit for said wheels of said drive axle of the tractor. If the wheel speed of the wheels of said drive axle have reached a speed value below the wheel speed limit, then the motor or engine is controlled so that the wheel speed is returned to a speed value above the wheel speed limit.

An engine brake controller can obtain a performance characteristic of an engine. The engine brake controller can determine that engine braking is enabled to control the engine based on the performance characteristic of the engine. The engine brake controller can monitor a set of operating parameters of the engine. The engine brake controller can determine that operating values of the set of operating parameters satisfy respective thresholds of the set of operating parameters. The engine brake controller can determine an engine brake configuration associated with initiating engine braking of a set of cylinders of the engine based on the operating values satisfying the respective thresholds. The set of cylinders can be a proper subset of a total number of cylinders of the engine. The engine brake controller can cause engine braking to be applied to the set of cylinders to increase a temperature of exhaust gas from the engine.

To provide an optimized method for engine brake compensation, a method for operating a coolant circuit (100) of a vehicle (200) is proposed, wherein the coolant circuit (100) has at least a first evaporator (10) and a compressor (11), wherein during a braking operation of the vehicle (200) a liquid coolant flow is passed over the first evaporator (10), wherein essentially no phase change of the coolant takes place in the first evaporator (10), so that the liquid coolant flow is directed to the compressor (11) and causes an increase in the power output of the compressor (11) compared to operation with a vaporous coolant, wherein the energy used for the power output increase of the compressor (11) is provided by recuperation during the braking operation of the vehicle (200).

An engine brake system, comprising a housing comprising a first passage extending along a first axis, a second passage extending along a second axis that intersects the first axis, the first passage in communication with the second passage. The engine brake system further comprises a pin arranged in the first passage and configured to translate along the first axis to hold open one or more valves of an internal combustion engine, a wedge arranged in the second passage and configured to translate along the second axis and engage with the pin, and a solenoid coupled to the wedge and configured to actuate the wedge along the second axis.

The invention provides an engine control method, a vehicle control unit and a vehicle, and relates to the technical field of vehicle control. According to the method, an engine is not controlled under the conditions that a hand brake is pulled up and the opening degree of an accelerator is smaller than a first preset opening degree threshold value, and an accelerator pedal signal is responded through an ECU; the purposes of preventing the vehicle from suddenly moving due to mistakenly stepping on the accelerator during parking and avoiding accidents are achieved, meanwhile, when the hand brake is loosened and the brake opening degree is smaller than the preset brake opening degree threshold value, the engine is switched into the rotating speed control mode, the purposes of providing proper engine braking force and avoiding engine flameout are achieved when the vehicle is slightly braked, and the safety of the vehicle is improved. Therefore, the technical problem of engine flameout during starting of the AMT is solved, and the technical effects that vehicle jerking caused by engine flameout is avoided, and smoothness and comfort in the driving process are improved are achieved.

A rocker assembly includes a valve bridge, a guide post, and a spring. The valve bridge is operably associated with the rocker assembly and is configured to engage a first exhaust valve and a second exhaust valve, wherein the valve bridge includes an internal chamber extending into the valve bridge from a bottom side of the valve bridge. The guide post is disposed at least partially within the internal chamber, wherein the guide post is fixed to a valve train carrier and extends upwardly into the valve bridge, wherein the valve bridge is configured to translate along the guide post. The spring is disposed about the guide post, wherein a first end of the spring is disposed on a top surface of the valve train carrier, and wherein a second end of the spring is disposed against the bottom side of the valve bridge.

This invention relates to the field of engine braking technology, and particularly to an engine braking device and its control method, including an oil drain assembly. The oil drain assembly includes an oil drain chamber formed on a piston, with a valve ball at one end of the chamber protruding from the piston surface. An oil drain steel ball is disposed inside the oil drain chamber to seal it. A first oil drain spring is disposed on the side of the steel ball away from the valve ball, and a second oil drain spring is disposed between the steel ball and the valve ball. The oil drain assembly forms an oil drain passage communicating with the oil drain chamber. This invention, by integrating the oil drain assembly within the piston and utilizing the structural design of the valve ball being stressed before the piston, achieves early triggering of the oil drain action. This allows partial release of oil in the high-pressure chamber before the piston is fully stressed, effectively reducing the initial pressure peak, minimizing impact load, and preventing structural damage due to high-pressure accumulation.

The utility model discloses an engine brake rocker arm with an accurate stroke. The engine brake rocker arm comprises a rocker arm body, the upper end part of the threaded rod is fixedly connected to the rocker arm body; a mounting cavity is formed in the piston body, the upper end face of the piston body is open, and the lower end of the threaded rod is arranged in the piston body in a penetrating mode; the limiting cap is arranged on the threaded rod in a sleeving mode, at least part of the limiting cap is located in the piston body, and the threaded rod is prevented from disengaging from the piston body; the locking ring is arranged on the limiting cap in a sleeving mode and located in the piston body, the inner diameter of the locking ring is smaller than the maximum outer diameter of the limiting cap, and the maximum outer diameter of the locking ring is larger than the inner diameter of the opening in the upper end of the piston body; and the spring is arranged on the threaded rod in a sleeving mode and compressed between the limiting cap and the lower end of the threaded rod, and the spring enables the threaded rod to have the tendency of being away from the limiting cap from top to bottom all the time. The piston is accurate in stroke, simple in structure, convenient to install and low in machining cost.

The invention relates to an engine brake device for a valve drive of an internal combustion engine, comprising a lever-type cam follower which is mounted so as to be rotatable about a pivot axis and which carries a piston eccentrically with respect to the pivot axis, said piston being movable between a starting position and a contact position, the piston is moved from an initial position to a contact position by the pressure chamber from the action of pressure in the supply line, the contact position being used to establish contact of the piston with a gas exchange valve or a pressure relief valve in the valve drive. Furthermore, a check valve is provided, which is located between the pressure chamber and the supply line and is preloaded in the open state, the check valve being arranged eccentrically with respect to the piston.

A vehicle includes a powertrain with a prime mover, a transmission with a number of gears, and foundation brakes. The speed of the vehicle along a downhill route segment is automatically controlled toward a target speed by prioritizing the use of engine braking power and gear downshifting in the transmission over application of the vehicle's foundation brakes.

A compression-release engine brake system for operating at least one exhaust valve of an engine during an engine braking operation. The brake system comprises a lost motion exhaust rocker assembly and a dual stage hydraulic solenoid valve. The exhaust rocker assembly includes an exhaust rocker arm and a compression brake control module (CBCM). The CBCM maintains the at least one exhaust valve open when in the engine braking operation. The CBCM includes a casing, an actuation piston disposed outside the casing so as to define an actuation piston cavity, a reset check valve, and a compression brake actuator disposed in the casing. The actuation piston reciprocates relative to the casing. The compression brake actuator includes a control piston that engages the check valve when deactivated so as to unlock the actuation piston cavity and disengages from the check valve when activated so as to lock the actuation piston cavity.

Braking a power tool motor based on a phase voltage of the motor. The power tool includes a motor and a power source providing operating power to the motor. A power switching network is between the power source and the motor to drive the motor. An actuator is operable to provide an input. An electronic controller is connected to the actuator and the power switching network. The electronic controller is configured to receive an indication related to initiating braking of the motor, control the power switching network to allow the motor to coast, monitor a phase voltage of the motor, determine whether the phase voltage of the motor is equal to or less than a phase voltage threshold, and control, in response to the phase voltage of the motor being equal to or less than the phase voltage threshold, the power switching network to brake the motor.