323results about "Mechanical control" patented technology

An ammonia burning internal combustion engine can feed ammonia and a highly combustible substance burning easier than ammonia to a combustion chamber. When the amount of ammonia fed into the combustion chamber is increased or when the ratio of the amount of the ammonia to the total amount of the ammonia and the highly combustible substance fed into the combustion chamber is increased, the operating parameters of the internal combustion engine are controlled so the air-fuel mixture fed into the combustion chamber is made easier to burn. As a result, an ammonia burning internal combustion engine designed to suppress a drop in combustibility of auxiliary fuel due to ammonia, can be provided.

Embodiments for heating a vehicle cabin are disclosed. In one example, a method for heating a vehicle cabin comprises closing an exhaust throttle while diverting at least a portion of throttled exhaust gas through an exhaust gas recirculation (EGR) cooler coupled upstream of the throttle, and transferring heat from the EGR cooler to a heater core configured to provide heat to the vehicle cabin. In this way, exhaust heat may be directly routed to the cabin heating system.

One or more throttle bodies and a surge tank are disposed behind a cylinder head, and an intercooler is disposed by being adjacent to the surge tank at a position behind the cylinder head and the one or more throttle bodies. A supercharger is provided in front of the intercooler.

A method for starting a compression ignition engine having at least one cylinder with a reciprocating piston located therein, an intake valve configured to control the intake of air to an intake port of the cylinder and an exhaust valve configured to control the expulsion of gas from an exhaust port of the cylinder. The method includes the steps of: cranking the engine, conditioning intake air at the intake port of the cylinder to raise the temperature of air in the cylinder, controlling a valve timing the intake valve and/or the exhaust valve to allow the piston to compress the air within the cylinder, thereby increasing the temperature of the air within the cylinder, and injecting fuel into the cylinder when the air within the cylinder has been heated to a temperature sufficient to support compression ignition of a gasoline and air mixture within the cylinder.

The invention discloses a sparking plug ignition-type premixing compression ignition system of an internal combustion engine, and belongs to the technical field of combustion of internal combustion engines. According to the premixing compression ignition system, a high-energy sparking plug is adopted for igniting diesel oil or igniting mixtures of the diesel oil and other fuels, wherein the dieseloil or the mixtures serve as the fuels for premixing and are jetted out in a gas feeding process or a compression process to generate premixing gas in a combustion chamber. By adopting an effective compression ratio under which the premixing gas cannot be ignited, the premixing gas in a cylinder cannot burn spontaneously; by using the high-energy sparking plug for ignition close to a compressionupper limit point, the mixed gas nearby the sparking plug is ignited to make the temperature and the pressure in the cylinder quickly rise, the other remaining premixing gas in the cylinder satisfiesthe conditions for spontaneous combustion, large-scale multi-point spontaneous combustion happens, and fast combustion of the premixing gas is achieved. By adopting a high expansion ratio, the heat efficiency is further improved.

A driving force control system for a vehicle having a mechanism for changing an engine speed continuously. The driving force control system basically controls said mechanism in a manner such that the engine speed is adjusted to optimize fuel economy. The driving force control system is configured to determine an index representing a demand to enhance agility of behavior of the vehicle based on an actual behavior of the vehicle or an amount of operation carried out by a driver to cause said behavior. An upper limit value of the engine speed of the case in which a drive demand is increased is determined on the basis of the index, and the upper limit value is set to the higher value with an increase in the index representing the demand to enhance agility of behavior of the vehicle.

A system and method for providing a variable compression ratio internal combustion engine is disclosed. The system can include a frame affixed to the engine crankcase and a complementary frame affixed to the block/cylinder head assembly. The system can further comprise an actuating system to enable the block/head assembly to be moved up and down with respect to the crankcase, varying the compression ratio of the engine. A number of mechanisms can be used to achieve this movement, including a rack and pinion, a hydraulic or pneumatic actuator, and a gear drive. The compression ratio can be varied continuously during use. The frames substantially limit movement of the engine components to the y-axis, thus reducing, or eliminating, unwanted movement and stresses in other directions.

A diesel engine for a vehicle comprises an engine body mounted in the vehicle having a plurality of cylinders that is supplied with fuel, a plurality of fuel injection valves for directly injecting the fuel into the cylinders, and an injection control module for controlling a mode of injecting the fuel into the cylinders through the fuel injection valves. The injection control module sets a fuel injection amount per cylinder at least according to a load on the engine body, performs a main injection, and performs at least one pre-injection where fuel is injected prior to the main injection. The injection control module further executes a cylinder-cutoff operation mode where the fuel supplies to the cylinder or the cylinders are stopped when the engine body is under a low load condition where the fuel injection amount per cylinder is below a predetermined amount.

The invention relates to a reciprocating-piston internal combustion engine with variable compression, having an actuating unit for changing a variable compression of the reciprocating-piston internal combustion engine, wherein, to change the variable compression, the actuating unit actuates a variable engine component of the reciprocating piston internal combustion engine in the form of a connecting rod with variable length, a piston with variable compression height and/or a crankshaft with variable crankshaft radius, and the actuating unit is arranged at a lower level than the reciprocating-piston internal combustion engine. Also proposed are a method and also an actuating unit for the same.

A method may comprise, on board a vehicle, identifying a volume of gaseous fuel in a tank based on a volume of liquid fuel in the tank, the liquid fuel comprising a first fuel and a second fuel, the gaseous fuel comprising essentially the second fuel, and identifying quantities of the first fuel and the second fuel in the tank based on a solubility of the second fuel in the first fuel.

An engine system may include an engine having an intake line flowing an intake gas supplied to the combustion chambers; an intake manifold; a throttle valve provided at a front of the intake manifold and controlling an air amount supplied to the combustion chamber; an electric supercharger provided at the throttle valve and including a motor and an electric compressor operated by the motor to supply the supercharged air to the combustion chamber; an exhaust gas processing device purifying an exhaust gas generated in the combustion chamber; and an exhaust gas recirculation device including a recirculation line branched from the downstream portion of the exhaust gas processing device and joined to the intake line of the upstream portion of the electric compressor, an EGR cooler mounted at the recirculation line, and an EGR valve mounted at a part where the recirculation line and the intake line are joined.

The invention discloses a hydraulic-drive type variable-compression-ratio piston connection rod assembly in order to solve the problems that in the prior art, a mechanism is complex, abrasion is large and control precision is low. The hydraulic-drive type variable-compression-ratio piston connection rod assembly comprises a piston, an extension spring, a piston pin, a connection rod, a three-position four-way electromagnetic valve, a hydraulic pump, a one-way valve and other hydraulic elements. Engine oil is pumped out by the hydraulic pump, after the direction of the engine oil is changed through the three-position four-way electromagnetic valve, the engine oil sequentially flows in an oil way of the connection rod and an oil way of the piston pin, and finally a push rod ejects a small ball in the one-way valve so that the size of a main oil cavity is reduced and the compression ratio of an engine is reduced. By means of the mode that the pressure of the engine oil in the oil way on the lower portion of the piston is increased and the small ball of the one-way valve is ejected, the size of the main oil cavity is increased, and accordingly the compression ratio of the engine is increased. The compression ratio piston uses a hydraulic mechanism mode, is quick in response, high in precision and high in reliability, and meets requirements of the engine for dynamic performance and fuel economy under various working conditions.

The invention relates to a vehicle control apparatus. It is possible to suppress the downward movement of the vehicle on the uphill road when the engine is automatically stopped based on the idling stop control and the braking operation is released and the engine is restarted. The vehicle control apparatus includes a vehicle speed detection part, an idle stopping control part for making the engine automatically stop if the engine stopping condition including braking operation and a vehicle speed being less than or equal to a first speed is satisfied and making the engine automatically start if a condition is satisfied, including a condition that, after the engine is automatically stopped, a braking stopping operation is performed; and an uphill road determination part determining that the vehicle is on an upslope; and a brake control part automatically generating a braking force if it is determined that the vehicle is on an upslope, during a period from when the engine starting condition is satisfied to the engine starting is completed as a result of the braking stopping operation before the vehicle is stopped after the engine is automatically stopped.

A wheel loader includes detectors and a controller. The detectors include at least an accelerator pedal angle detector that detects an accelerator displacement. The controller includes: a state judging unit that judges from a detection result provided by the detectors whether or not the wheel loader is in an excavation operation; and a torque-curve selector. The torque-curve selector selects one excavation torque curve when the wheel loader is judged to be in the excavation operation by the state judging unit, and selects one of two or more non-excavation torque curves depending on the accelerator displacement when the wheel loader is judged not to be in the excavation operation.

The invention discloses an engine with a compression ratio capable of being changed. The engine comprises a crank case, multiple sets of changeable crankshaft and a crankshaft arm adjusting device, and the crankshaft arm adjusting device comprises a rotating shaft and multiple gears, wherein the rotating shaft is rotatably supported in the crank case, one end of the rotating shaft is provided with a locking device, the gears are fixedly arranged on the rotating shaft, and the gears are meshed with disc gears and can drive the disc gears to rotate; that is to say, the length of a crankshaft arm of the engine can be changed, the compression ratio of the engine can be changed by changing the length of the crankshaft arm, and therefore power performance and economical efficiency of the engine are effectively improved.

The invention relates to an engine idle speed reduction oil saving method and device. The method comprises the steps that driving state information of a current vehicle, the rotation speed of an engine and current speed changing intention information of a driver are detected; whether the current vehicle is in an idle speed state or not is judged according to the driving state information and the rotation speed of the engine; and if yes, whether the rotation speed of the engine of the current vehicle is adjusted from the current first idle speed to a preset low idle speed or not is determined according to the speed changing intention information. The scheme can be achieved only by an electric control system of the engine, the production cost of the engine does not need to be additionally increased, the problem that as the starting performance of the vehicle is reduced, the user experience is reduced is avoided, and the functions of energy conservation and emission reduction can be achieved.

The exhaust purification system comprises an exhaust purification catalyst, downstream side air-fuel ratio sensor, and control device. The control device performs average air-fuel ratio control which alternately sets a target average air-fuel ratio between a rich air-fuel ratio and a lean air-fuel ratio and inter-cylinder air-fuel ratio control which controls the target air-fuel ratios of the cylinders so that the target air-fuel ratio becomes the rich air-fuel ratio at least at one cylinder among the plurality of cylinders even if the target average air-fuel ratio is set to the lean air-fuel ratio. The control device uses a cumulative value of a first oxygen amount from when switching the target average air-fuel ratio to the lean air-fuel ratio to when again switching it to the rich air-fuel ratio and a cumulative value of a second oxygen amount from when switching the target average air-fuel ratio to the rich air-fuel ratio to when again switching it to the lean air-fuel ratio as the basis for correcting a parameter relating to the air-fuel ratio so that the difference of these becomes smaller as learning control.

A controller integrated fuel pump module for a vehicle, may include a reservoir cup configured to be fixed to an interior of a fuel tank, a fuel pump installed in an interior of the reservoir cup to pump fuel introduced into the interior of the reservoir cup, and a flange for fixing the reservoir cup and the fuel pump to the fuel tank, wherein a receiving part may be formed to an outer surface of the flange and may include an inner space, and wherein a printed circuit board (PCB) assembly configured to mount devices of a controller to a PCB may be molded in the receiving part, in a state in which the PCB assembly may be received in the receiving part, and a molding portion surrounds the PCB assembly in the receiving part.

Disclosed herein is a vehicle having improved engine startability using hardware wake-up period control by performing a vehicle state detection mode to which a battery voltage, an engine oil temperature, and an engine coolant temperature are applied by a controller in a key-off state of an engine, a wake-up fuel pressure control mode for determining whether a soaking time reaches a wake-up set time by the count of a key-off timer for 80 minutes, a pump operation control mode for operating a low-pressure fuel pump for approximately 1 second by the current supplied in response to a key-off output signal over the period of 80 minutes, and a wake-up repetition control mode for repeating a number of times the low-pressure fuel pump is operated to maximum 6 times.