Starting system and control method

Abstract

The invention relates to the technical field of automobiles, and discloses a starting system and a control method. The starting system comprises an engine, a generator, a control unit, a gas storage tank, a suction pipeline and an electromagnetic valve. The generator can drive the engine to rotate. The engine comprises a cylinder, a piston and a throttle valve, the cylinder is provided with a gas intake manifold, and the throttle valve is arranged on the gas intake manifold. The two ends of the suction pipeline can communicate with the gas storage tank and the gas inlet manifold correspondingly, and the throttle valve and the suction pipeline are sequentially arranged in the flowing direction of gas in the gas inlet manifold. And the electromagnetic valve is arranged on the suction pipeline. In the shutdown process, the throttle valve is closed, the electromagnetic valve is opened, the piston sucks air in the gas storage tank through the gas inlet manifold, and the pressure of the gas storage tank is reduced. In the starting process, the pressure of the gas storage tank is smaller than the maximum allowable pressure of the gas storage tank, the throttle valve is closed, the electromagnetic valve is opened, and the gas storage tank extracts air of the gas inlet manifold, so that the compression reaction force of the piston is reduced, the starting efficiency is improved, and the NVH performance of the engine is improved.

Description

technical field [0001] The invention belongs to the technical field of automobiles, and in particular relates to a starting system and a control method. Background technique [0002] The hybrid vehicle has a series configuration hybrid, and the engine and generator are directly connected together through torsional shock absorbers. During the starting process, the output torque of the generator drags the engine to a certain speed and then the engine ignites, then the torque of the generator turns from positive torque to negative torque for power generation, and the power output by the generator is transmitted to the drive motor to complete the drive of the vehicle . [0003] During the start-up dragging process, the dragging resistance torque comes from the moment of inertia of the crankshaft, torsional shock absorber, reduction gear and generator rotor on the one hand, and from the compression reaction force of the piston in the engine on the other hand. At present, the ac...

AI Technical Summary

Problems solved by technology

Since the intake and exhaust variable valve timing of the current engine is mostly in the form of hydraulic drive, the variable valve timing can hardly be controlled during the starting process, so it is difficult to effectively reduce the actual progress in the cylinder during the dragging process only through throttle control. capacity

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