41 results about "Automotive diesel engine" patented technology

A fuel injection system for automotive diesel engine is provided which is equipped with a fuel pressure sensor working to measure the pressure of fuel in an accumulator and a pressure-reducing valve working to drain the fuel from the accumulator. The system is designed to ensure enhanced reliability of diagnosis of the pressure-reducing valve. The system works to make a temporal diagnosis of the pressure-reducing valve based on the behavior of the pressure in the accumulator upon opening of the pressure-reducing valve after an ignition switch is turned off. After elapse of a given period of time, when it is determined that a value of the pressure in the accumulator, as measured by the fuel pressure sensor, lies near the atmospheric pressure, the system determines that the fuel pressure sensor is operating properly and fixes the temporal diagnosis of the pressure-reducing valve ultimately.

The invention belongs to the technical field of auto parts, and relates to a fuel delivery pump with a floated cycloid rotor. The fuel delivery pump with the suspended cycloid rotor comprises a fuel delivery pump body, an outer rotor, an inner rotor and a universal joint. The fuel delivery pump body is in an integral structure. A transverse guide groove is reserved on the bottom surface of a pump inner cavity between the upper portion of a right wall of a low pressure oil cavity and the inner wall of the pump inner cavity. Seven axial through grooves on the outer wall of the outer rotor are distributed at central radial positions of inner wall tooth sections of the outer rotor. When the inner rotor and the outer rotor rotate, fuel flows along the transverse guide groove and the axial through grooves to positions to be lubricated. An oil film is formed between the outer wall of the outer rotor and the inner wall of the pump inner cavity, the outer rotor cannot be contacted with the fuel delivery pump directly under the action of liquid surface tension, the outer rotor is floated in the fuel delivery pump body, and accordingly friction between the outer rotor and the fuel delivery pump body is avoided, and the service life of the fuel delivery pump is prolonged. The fuel delivery pump with the suspended cycloid rotor is stable in operation, low in pulsating, low in noise and high in volume efficiency, and is applicable to automotive diesel engine fuel injection systems.

The invention discloses a diagnostic method and device for particulate matter discharging for a novel external automotive diesel engine. The device comprises a control unit (DCU) and a sensor unit connected with the DCU. The sensor unit is used for collecting current values and comprises an ionization electrode and a signal electrode. The ionization electrode is partly wrapped with a high-temperature-resistant insulating ceramic tube. The high-temperature-resistant insulating ceramic tube is partly wrapped with insulating seal gum and is partly wrapped with a common insulating ceramic tube. An ionization area is formed by the common ceramic tube, the ionization electrode and a grounding shielding shell. The ionization area is communicated with a sampling channel through an inlet of the ionization area and is communicated with the atmosphere through a hole communicated with the atmosphere, and the sampling channel is communicated with an exhaust pipe through an exhaust sampling opening. According to the diagnostic method and device for particulate matter discharging for the novel external automotive diesel engine, the influences of the severe environment in the exhaust pipe of the diesel engine are avoided, the structure is simple, precision is high, the measuring range is large, and particulate discharging can be effectively diagnosed and measured.

The invention relates to a thermal insulation device of an automobile diesel oil pipe. The thermal insulation device comprises a vehicle-mounted power supply, first flow valves, an oil pipe, a thermal insulation circular pipe, a water tank, a cooling water pump, a cooling water pipe, a temperature sensor, an automobile controller, a heating resistance wire and a second flow valve, wherein the thermal insulation circular pipe is arranged on the outer side of the oil pipe, the heating resistance wire and the temperature sensor are placed between the thermal insulation circular pipe and the oil pipe, the cooling water inlet and outlet ends of the thermal insulation circular pipe is connected with the cooling water pipe, so as to form a cooling water pipeline, both ends of the cooling water pump are arranged in the cooling water pipeline, and the first flow valves are arranged on the cooling water pipe which is close to both ends of the thermal insulation circular pipe; the left side of the water tank is connected with the cooling water pipe, the right side of the water tank is connected with a cooling pipe in a diesel cooling system, and the left side and the right side of the water tank are communicated by virtue of the second flow valve; the vehicle-mounted power supply, the first flow valves, the second flow valve, the cooling water pump, the temperature sensor and the heating resistance wire are connected with the automobile controller. By using the thermal insulation device, the thermal insulation effect of the diesel oil pipe is effectively guaranteed, and the oil work efficiency is improved.

Reformulated diesel fuels for automotive diesel engines which meet the requirements of ASTM 975-02 and provide significantly reduced emissions of nitrogen oxides (NO_x) and particulate matter (PM) relative to commercially available diesel fuels.

The invention relates to a car diesel engine controller which comprises an upper cover plate and a lower cover plate that are fixed with each other, and a control circuit board fixed in a cavity consisting of the upper cover plate and the lower cover plate, wherein the upper cover plate is fixed with an atmospheric pressure inducing device and at least one socket connector, four corners of the upper cover plate are all provided with mounting holes, the socket connector comprises a column socket and a pin fixed in the socket, the pin passes through the upper cover plate and is welded and fixed on the control circuit board, the upper cover plate is provided with a lug boss used for protecting the atmospheric pressure inducing device, one side of the lug boss is provided with a channel groove, the atmospheric pressure inducing device is fixed into the groove, and the end face of the upper cover plate is provided with a radiating structure. Compared with the prior art, the invention has the characteristics of light weight, small volume, better radiation, better insulation and shock absorption, and the like.

The invention discloses a water cooling system for an automobile diesel engine, comprising a diesel engine (1), a cooling liquid pump (2), a temperature control valve (3), a cooling liquid cooler (4), a bypass pipe (5) and a lubricating oil cooler (6), filter (7), lubricating oil pump (8) and supercharged intake air cooler (9), the diesel engine is connected to the coolant cooler through the coolant pump, and there is a A temperature control valve is provided, and the temperature control valve is connected with the cooling liquid cooler through a bypass pipe. One end of the cooling liquid cooler (4) is connected with a lubricating oil cooler (6), and the lubricating oil cooler (6) is respectively It is connected with the supercharged intake air cooler (9), the diesel engine (1) and the filter (7). One end of the filter (7) is connected with a lubricating oil pump, and one end of the lubricating oil pump is connected with the diesel engine. connected to the diesel engine. The invention adopts the water cooling system of the automobile diesel engine, the structure design is reasonable, and the water cooling effect is good.

The invention relates to the field of automobile diesel engine manufacturing, in particular to an oil pump oil circuit and a diesel motor vehicle. The invention discloses an oil pump oil circuit, which is used for light-duty diesel engines, and comprises a fuel tank, an oil delivery pump and a common rail pipeline connected in sequence; the common rail pipeline is connected with an oil return pipe, and the end of the oil return pipe far away from the common rail pipeline is connected with the fuel tank; The oil delivery pump includes a lubricating pipeline and a plunger pump connected to the oil delivery pump. The lubricating pipeline is used to lubricate the plunger pump; the oil delivery pump also includes a pump inner chamber, which is used to collect the leaked oil in the plunger pump and the plunger pump. The lubricating oil of the pump, and the inner cavity of the pump is connected with the oil return pipe. The oil circuit of the oil pump can ensure the stability and accuracy of oil quantity, reduce the load of the oil delivery pump, and improve the oil supply capacity and reliability of the oil delivery pump at low speed.

The invention discloses a method for preparing a high-strength piston material for an automobile diesel engine. The chemical composition and mass percentage composition of the piston material are: 24.5%-26% of samarium, 6.5%-8% of tin, 52%-56% of nickel, Titanium 7.5%‑12%, the rest is iron.

The invention discloses a preparation method of a high-strength piston material of an automobile diesel engine.The piston material is prepared from, by mass, zirconium 24.5%-26%, rhodium 6.5%-8%, nickel 52%-56%, palladium 7.5%-12% and the balance iron.

The invention discloses a preparation method of a high-strength piston material of an automobile diesel engine.The piston material is prepared from, by mass, samarium 24.5%-26%, bismuth 6.5%-8%, aluminum 52%-56%, palladium 7.5%-12% and the balance iron.

The invention discloses a preparation method of a high-strength piston material of an automobile diesel engine.The piston material is prepared from, by mass, zirconium 24.5%-26%, lanthanum 6.5%-8%, aluminum 52%-56%, osmium 7.5%-12% and the balance iron.

The invention discloses a preparation method of a high-strength piston material of an automobile diesel engine. The piston material is composed of, by mass, 24.5-26% of zirconium, 6.5-8% of tantalum, 52-56% of copper, 7.5-12% of holmium and the balance iron.