116 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 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.

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.

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.

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.

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.

Vehicle operating procedures, comprehensive: Operating a continuously variable transmission (CVT) via a control unit to adjust the engine speed according to a first engine speed-to-vehicle speed profile in response to a request for engine braking; and Changing the operation of the CVT via the control to adjust the engine speed according to a second engine speed-to-vehicle speed profile in response to a vehicle speed error and brake pedal position.

The buffering mechanism of the engine braking rocker arm comprises an elastic body, the elastic body is arranged between the rocker arm and a rocker arm shaft, the elastic body abuts against the rocker arm and the rocker arm shaft, and elastic deformation of the elastic body exerts acting force between the rocker arm and the rocker arm shaft. When the rocker arm is driven to move, the motion resistance of the rocker arm on the rocker arm shaft is caused, the motion resistance keeps the rocker arm in two non-collision positions on the rocker arm shaft, and in the two non-collision positions, one end of the rocker arm avoids driving of an engine cam, and the other end of the rocker arm avoids acting with an engine valve. The rocker arm does not move in the ignition period of an engine, mechanism flying-off, friction and oil consumption are eliminated, and the use frequency is greatly reduced.

In one embodiment, a valve train assembly includes a rocker arm having a cam end in proximity to a cam and a valve end opposite to the cam end and in proximity to one or more valves, an engine brake capsule coupled to the cam end, and a cylinder deactivation capsule coupled to the cam end. The engine brake capsule includes an actuation pin assembly, a check valve assembly, and a plunger, and is configured to switch between a retracted position and an extended position. The cylinder deactivation capsule includes an outer body, an inner body, and a latching mechanism, and is configured to switch between a latched position and an unlatched position. In this way, the valve train assembly may perform both engine brake and cylinder deactivation functionalities, for example, at the cam side of the valve train assembly.

The application discloses an automatic gear heavy truck multi-mode engine brake control method, equipment and medium, the method comprises the following steps: determining whether the engine enters the gearbox shift mode in the multi-mode engine brake according to the gear signal in the automatic gear heavy truck vehicle information, determining whether the engine brake enters the condition when it is not shifting, if yes, receiving the engine brake instruction to control the engine to enter the corresponding engine brake mode; determining the target brake power percentage of the engine brake in the engine brake mode of the driver and the target speed in the automatic constant speed engine brake mode; determining the brake gear level matched with the brake torque of the target brake power percentage or the target speed of the brake power range and adjusting the brake power; when the rising rate of the vehicle speed or the engine speed exceeds the threshold value in the preset time interval, the engine has the risk of overspeed, the emergency brake mechanism in the emergency full brake mode is started, and the multi-mode engine brake control of the automatic gear heavy truck is realized.

The invention discloses a brake cam profile for increasing the brake power of a diesel engine and a control method, belongs to the technical field of engine brake cams, and solves the technical problem that an existing cam can only brake once in one cycle. The brake cam profile comprises a base circle, the base circle is provided with a BGR lift section profile, a first release lift section profile and a second release lift section profile which are sequentially arranged, a first base circle section is arranged between the BGR lift section profile and the first release lift section profile, and a second base circle section is arranged between the first release lift section profile and the second release lift section profile. The length of the first base circle section is smaller than that of the second base circle section, and the second release lift section molded line and the BGR lift section molded line are connected together. According to the invention, two times of braking in one cycle can be realized in a single braking cycle, and in-cylinder media of a second intake stroke and a compression stroke come from gas backflow released into an exhaust pipe for the first time, so that higher in-cylinder pressure can be generated, and more negative work can be done.

A method to increase efficiency in a hydrogen fuel system requiring high pressure hydrogen injection and having a plurality of hydrogen fuel tanks, the method including controlling one or more hydrogen fuel tanks and at least one hydrogen fuel tank to provide fuel in parallel to the hydrogen fuel consumer. The method includes determining when an intermediate tank pressure threshold has been reached in all hydrogen fuel tanks. The method includes responsive to the intermediate tank pressure threshold being reached in all of the hydrogen fuel tanks, removing the at least one hydrogen fuel tank from providing fuel to the hydrogen fuel consumer while using one or more hydrogen fuel tanks to provide hydrogen fuel to the fuel consumer. The method includes when an engine brake event has been detected, pumping hydrogen from the one or more hydrogen fuel tanks into the at least one hydrogen fuel tank.

The invention discloses a diesel engine aftertreatment system heat management control method, system and device and a storage medium. The method comprises the steps that working condition information, exhaust passage temperature information, carbon load information and engine working condition information of a target vehicle are obtained; determining a thermal management mode of the post-processing system based on the working condition information, the exhaust passage temperature information and the carbon load information; target control parameter information is calculated based on the engine working condition information and the thermal management mode in combination with the MAP; based on the target control parameter information, a cooperative control instruction set is generated, and the cooperative control instruction set is used for controlling an engine braking device, an exhaust braking valve, an air inlet throttling valve and a high-pressure common rail oil injection system to conduct cooperative operation. The technical problems that the post-processing system is high in heat management cost and poor in post-processing control precision and reliability are solved.

A motorcycle rider assistance device comprises a brake start inter-vehicle distance calculation unit (3) that calculates a brake start inter-vehicle distance between the rider's own vehicle and another vehicle at a time when the rider's own vehicle begins to decelerate by means of engine braking, an engine braking acceleration value calculation unit (6) that calculates an acceleration value of the rider's own vehicle, an engine braking acceleration value storage unit (7) that stores an acceleration value of the rider's own moving vehicle, a driving condition estimation unit (9) that estimates a driving condition of the rider's own vehicle, and an engine braking acceleration value correction unit (10) that corrects an acceleration value obtained by means of engine braking;the motorcycle rider assistance device is configured such that when the riding condition estimation unit (9) estimates that the rider's own vehicle is in a predetermined riding condition, braking of the rider's own vehicle is initiated by the engine brake.

The operation of the air conditioning system is controlled according to the vehicle's driving conditions. [Solution] The air conditioning control device 30 has an air conditioning control unit 322 that controls the output of a compressor 21 included in an air conditioner 20 that conditioned the air inside the vehicle S, and the air conditioning control unit 322 makes the output of the compressor 21 when the vehicle S is accelerating less than the output of the compressor 21 when the engine brake is applied to the vehicle S.