17 results about "Engine efficiency" patented technology

The application discloses a compression ignition type methanol engine and a control system thereof, and relates to the technical field of engine control, which comprises a methanol engine and a methanol tank, further comprises a methanol water boiler, and is provided with an electric heating plug at a cylinder of the methanol engine; the methanol tank is connected with the methanol water boiler, a first methanol pump and a second methanol pump through connecting pipelines respectively; control valves one, two and three are arranged on the connecting pipelines respectively; the control system of the compression ignition type methanol engine comprises a cold start and warm-up working condition identification module, an acceleration working condition identification module, a load working condition identification module and an engine control module; the high-efficiency and reasonable heat management system and the air intake passage / in-cylinder double-methanol injection supply technology are adopted, the methanol engine can be operated efficiently in all working conditions, the efficiency and the power of the methanol engine can be improved simultaneously, and the effect of the high-efficiency and high-power compression ignition type methanol engine is realized.

This invention discloses an anti-knock control method, control device, and vehicle applied to an engine in a hybrid power system. The control method includes: adjusting the engine's initial demand torque change rate limit, initial torque limit, and initial speed limit to a first demand torque change rate limit, a first torque limit, and a first speed limit, respectively; acquiring the engine's knock intensity signal and knock thrust angle under normal operating conditions; determining the engine's knock risk based on the knock intensity signal and knock thrust angle; and correcting the first demand torque change rate limit, the first torque limit, and the first speed limit based on the knock risk. The anti-knock control method provided by this invention can adjust the engine's parameter usage limits in real time, using the engine to operate to the maximum extent possible and to prevent the risk of engine knock, thereby improving engine efficiency and economy.

A calibration method for torque distribution in a rear-wheel-drive DHT parallel mode is disclosed, belonging to the field of automotive automatic transmission control. The method is as follows: data preparation; determining and discretizing the powertrain operating data table; selecting the optimal torque distribution scheme; generating a calibration data table; writing the calibration results into the control strategy; using simulation software, inputting specified vehicle data, and equipping the vehicle with the corresponding engine and rear-wheel-drive DHT, evaluating the torque distribution portion of the control strategy in the DHT parallel mode through simulation analysis. If the simulation results show that the power and economy meet the design goals, the calibration data for the torque distribution in the DHT parallel mode of the control strategy is qualified; otherwise, it is unqualified. This invention effectively avoids the situation where simply considering engine efficiency leads to low efficiency of the motor, battery, and transmission system, resulting in low efficiency of the entire DHT powertrain system, thus effectively improving the power and economy of vehicles equipped with DHT.

The application discloses a two-stroke free piston engine, which comprises two opposite cylinders, a swing gear, a first one-way clutch, a second one-way clutch, a first power output and a second power output, and a piston connected through a push rod, wherein the swing gear is engaged with a rack on the push rod, the swing gear is connected with the first power output through the first one-way clutch and connected with the second power output through the second one-way clutch, and the piston makes a linear reciprocating motion once to form a first stroke and a second stroke in sequence, and in each stroke, one cylinder works and the other cylinder compresses to ensure the output power of each stroke, and the power of the two power outputs is coupled and then outputted as continuous power through a transmission unit. Thus, the complex transmission mechanism formed by the push rod, the crankshaft and the like in the prior art can be cancelled, the linear reciprocating motion of the piston is converted into rotary motion, the power in the rotary form is outputted, and the engine efficiency is improved.

This invention discloses an oil reservoir assembly, a power system, and a vehicle, relating to the field of vehicle technology. It aims to solve the problem of preventing oil-air mixtures from entering the engine and affecting engine efficiency. The oil reservoir assembly is applied to a vehicle and includes a first oil reservoir adapted to store lubricating oil and connected to the vehicle's engine. Along the length of the vehicle, the first oil reservoir is preferably positioned between the engine and the front end of the vehicle, with a distance of not less than 500mm between the first oil reservoir and the engine's exhaust pipe. Thus, in the event of a collision, because the distance between the first oil reservoir and the engine's exhaust pipe is greater than or equal to 500mm, the oil from the first oil reservoir is prevented from splashing onto the engine, thereby preventing accidental fire.

An engine is provided with various enhanced features. For example, a 2-stroke diesel engine has a porting design that enhances the efficiency of a scavenging event. In specific embodiments, a four-piece piston is positioned in each cylinder of the engine. The four-piece piston includes a bowl, a ring retainer, a skirt, and a wrist-pin bearing. In various embodiments, fuel pumps are coupled to fuel channels or high-pressure lines to provide a constant and equal high-pressure fuel supply to engine cylinders. In more specific embodiments, the length of each of the high-pressure lines is the same. In certain specific embodiments, complimentary screws form a supercharger that further improves engine efficiency by providing high-pressure intake air to the porting process.

This invention relates to a crankless piston internal combustion engine and its operating method, which can be widely applied to various motor vehicles and stationary engines. Engines according to this invention will provide higher economic efficiency and longer service life during operation. The engine efficiency according to this invention is achieved by applying a basic kinematic scheme that converts the linear reciprocating motion of the piston into the rotational motion of the engine drive shaft (9). The piston (21) performing the working cycle stroke completes its full working stroke by rotating the drive shaft (9) by 90°, instead of 180° as in conventional engines. Each stroke begins with drive gear sets (10, 11, 12, 13) (each set corresponding to one piston (21)) arranged at an angle of approximately 45° relative to the direction of piston (21) motion, and the sets are offset from each other by approximately 90°. The offset angles between the drive gear sets, starting with the drive teeth of the "expansion" stroke, are arranged at different angle values, allowing two, three, or more "expansion" strokes to be performed simultaneously. Each piston stroke does not begin with a zero torque value, but rather with a value equal to the maximum torque value of the crank-driven engine. According to the present invention, the engine torque and power values ​​are approximately three times, six times, and nine times that of an engine with a crank mechanism, respectively, at the same speed.

A computer system includes a processor controls the computer system to perform a computer-implemented method of determining a minimum humidity required for formation and persistence of contrails produced by an engine of an aircraft. The computer-implemented method includes determining engine performance model parameters of the engine at desired operating conditions with zero humidity; determining additional energy flow out of the engine; and determining an exhaust plume temperature scaling factor. The method further comprises determining a contrail engine efficiency parameter (noverall_λ) based on additional energy flow out of the engine and the exhaust plume temperature scaling factor; and generating an improved Schmidt-Appleman equation based on the contrail engine efficiency parameter (noverall_λ). The method further includes determining an improved mixing line slope based on the improved Schmidt-Appleman equation; and determining the minimum humidity required for formation and persistence of contrails produced by the engine based on the improved mixing line slope.

The application discloses a four-stroke free piston engine, which comprises two groups of oppositely arranged cylinders, a swing gear, a first one-way clutch, a second one-way clutch, a first power output and a second power output, wherein the swing gear is arranged in a fixed shaft rotation mode, the pistons of two cylinders in each group are connected through push rods, the swing gear is engaged with the racks on the two push rods, each cylinder sequentially completes an intake stroke, a compression stroke, a working stroke and an exhaust stroke, four strokes form one working cycle, and the piston of one cylinder is always working, and the other three cylinders are synchronously driven to complete an intake stroke, a compression stroke and an exhaust stroke respectively, so that the complicated parts such as the push rod, the crankshaft, the high-pressure oil bearing and the high-pressure oil pump in the prior art can be cancelled, the linear reciprocating motion of the piston is converted into rotary motion, the power in a rotary mode is output, the engine efficiency is improved, and the engine is suitable for being used as the engine of HEV, PHEV and REEV vehicles.

This invention relates to the design and implementation of a vehicle heater booster using a low-voltage immersion heater. This heater is placed directly in the radiator water path or vehicle heater circuit and is automatically activated and deactivated by intelligent temperature control. The purpose of this system is to heat the steam water faster in cold weather conditions, reduce the waiting time for the cabin to warm up, increase engine efficiency, reduce fuel consumption, and prevent premature wear of engine parts at low temperatures.

This invention discloses an engine housing, belonging to the field of engine technology. It includes an intermediate cavity, a first cavity and a second cavity located on either side of the intermediate cavity, and an oil storage chamber located below the intermediate cavity at the bottom of the housing. The oil storage chamber includes a first collection chamber, a second collection chamber, and a third collection chamber. The first collection chamber is directly connected to both the first and second cavities. The second collection chamber is connected to the intermediate cavity. The first and second collection chambers are connected to the third collection chamber via a first drive pump within the first cavity. The third collection chamber is connected to the transmission system via a second drive pump within the second cavity. This solution effectively avoids oil churning within the engine while ensuring lubrication of the moving mechanisms within the engine, thereby improving overall engine efficiency and reducing energy consumption.

An engine rotating valve type rotary servo valve mechanism, including valve core (1), valve seat (2), inlet and outlet manifold (3), one-way diaphragm (18), one-way diaphragm (19), engine cylinder and servo rotary motor; The servo valve method of the engine rotating valve type servo valve mechanism is to use the servo rotary motor as the power to drive the valve core (1) to rotate inside the valve seat (3), and to use the rotary transformer to monitor and accurately control the rotary position of the inlet valve core (1) relative to the valve seat (3), to realize the opening and closing between the inlet and outlet grooves and the corresponding inlet and outlet ports, so as to realize the stop of the valve. The device has the advantages of compact structure, stable gas supply, convenient use and adjustment, etc., can effectively reduce the vibration of the engine due to the valve, improve the engine efficiency, and has good market prospect.

This application relates to a combustion system, combustion method, engine, and vehicle. The combustion system includes a combustion cylinder and a return gas pipe. The combustion cylinder is connected to an intake pipe and an exhaust pipe. A first end of the return gas pipe is connected to the exhaust pipe, and a second end of the return gas pipe is connected to the combustion cylinder. The return gas pipe is configured to deliver at least a portion of the exhaust gas into the combustion cylinder, forming an exhaust gas layer surrounding the inner surface of the combustion cylinder. Air entering the combustion cylinder from the intake pipe is located within the area enclosed by the exhaust gas layer. Thus, the high-temperature exhaust gas layer can enclose the air, acting as an insulation layer during combustion, thereby reducing heat loss from the cylinder wall and allowing more heat to be used to drive the piston, improving engine efficiency.

This utility model provides an engine compartment hot air exhaust structure and vehicle. When the engine is running, hot air generated in the engine compartment enters the vent pipe through the vents on the wheel arch outer panel, and then flows along the vent pipe to the vents on the side panels. Guided by the vent reinforcement plate, the hot air continues to flow from the side panel vents to the fender vents, and is finally exhausted outside the engine compartment. By setting up sequentially stacked wheel arch outer panels, side panels, and fenders, and opening vents at their respective relative positions, and utilizing the channel formed by the vent pipe and the vent reinforcement plate, efficient exhaust of hot air from the engine compartment is achieved, effectively reducing the temperature inside the engine compartment and improving engine efficiency and service life.

A gas turbine engine has a compression system blade ratio defined as the ratio of the height of a fan blade to the height of the most downstream compressor blade in the range of from 45 to 95. This results in an optimum balance between installation benefits, operability, maintenance requirements and engine efficiency when the gas turbine engine is installed on an aircraft.

This application provides an engine and a vehicle having the same. Specifically, the engine includes an engine body, a first exhaust manifold, and a second exhaust manifold. The engine body has multiple cylinders, each cylinder including a first exhaust valve and a second exhaust valve, the diameter of the first exhaust valve being larger than the diameter of the second exhaust valve. The first exhaust valve of each cylinder is connected to the first exhaust manifold, and the second exhaust valve of each cylinder is connected to the second exhaust manifold. By integrating two exhaust valves with different diameters into each cylinder within the engine body, and combining the dual manifold with the differentiated exhaust valves, the exhaust gas flow path can be flexibly switched according to different operating conditions, achieving optimal distribution of exhaust gas energy, thereby further reducing emissions while ensuring engine efficiency. This application solves the problem in the prior art that engines are difficult to perform precise exhaust energy management for different operating conditions.

The utility model discloses an automobile silencer module relates to the technical field of automobile silencer, it includes the shell, and the air inlet end intercommunication of shell has the connecting pipeline, and the one end fixed intercommunication of connecting pipeline is away from the shell has the air inlet pipeline, and the air inlet pipeline is fixed intercommunication with automobile exhaust pipe, and the air outlet end integral intercommunication of connecting pipeline has the flow guide pipe, and is provided with the hole on the flow guide pipe, and the one end fixed intercommunication of flow guide pipe is away from the air outlet pipeline of connecting pipeline, and the air outlet pipeline's air outlet end extends to the outside of shell, and the outside of flow guide pipe is fixedly connected with the baffle along the vertical direction, and the baffle divides the inside space of shell into first cavity and second cavity, and the outside of shell is provided with mounting part, and mounting part is connected with the automobile dismounting. The automobile silencer module has played the resistance and the resistance silencing advantage, has realized the high -efficient suppression to the exhaust broadband noise, has guaranteed low exhaust back pressure simultaneously, thereby has improved the engine efficiency.