Efficient and quick starting method of engine applying solenoid-driven valves

An electromagnetic drive, fast start technology, applied in the direction of engine starting, engine motor starting, engine components, etc., can solve the problems of complex control and fuel consumption, shorten the transition time, reduce leakage and heat dissipation loss, and reduce fuel consumption. Effects of consumption and harmful emissions

Inactive Publication Date: 2012-05-30
NANJING UNIV OF SCI & TECH
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Problems solved by technology

[0006] 2. By controlling the piston to move to a specific position when the engine is stopped, fuel is directly injected into the cylinder and ignited to provide auxiliary power to start the engine when the engine is started. This method is not suitable for port injection gasoline engines, and the control is more complicated. to consume extra fuel

Method used

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  • Efficient and quick starting method of engine applying solenoid-driven valves
  • Efficient and quick starting method of engine applying solenoid-driven valves
  • Efficient and quick starting method of engine applying solenoid-driven valves

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Embodiment Construction

[0019] combine figure 1 , figure 2 , a control method for high-efficiency and rapid start-up of the engine. The engine uses electromagnetically driven intake valves and electromagnetically driven exhaust valves, and the engine electronic control unit performs double closed-loop feedback control of position and current to realize engine intake and exhaust valves. Independent, continuously variable, and real-time adjustment of opening and closing time, lift and its motion law. When the engine is in a stopped state and needs to be started, its efficient and fast start-up control method includes the following steps:

[0020] Step 1. Turn on the power switch, the initial state control is to open the intake valve, stop the fuel injection and ignition of each cylinder and close the exhaust valve;

[0021] Step 2. Start the motor to work, and the motor drives the engine speed to gradually increase until it is slightly lower than a certain set value of the engine idle speed (set to 7...

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Abstract

The invention discloses a control method for efficiently and quickly starting an engine. The engine applies a solenoid-driven inlet valve and a solenoid-driven exhausting valve, and is subjected to positioning and electric current double closed-loop feedback control by an engine electric control unit, so as to achieve the independent, continuously variable and real-time regulation of the opening moment, the closing moment, the lift range and the motion rule of the inlet valve and the exhausting valve of the engine; as in the process that the rotational speed of the engine rises step by step, the inlet valve basically keeps an opening state and stops the oil spraying and the ignition of each cylinder until a set rotational speed is reached, under the same power of a starting motor, the transition time can be obviously shortened; and the energy-saving performance and the environment-friendly performance of the engine can be improved.

Description

technical field [0001] The technical field of the invention relates to engines (reciprocating internal combustion engines), in particular to a type of engines using electromagnetically driven valves. Background technique [0002] The engine starting problem has always been a problem that has been paid attention to in the development of technology and has an important impact on its performance. A conventional engine drives the engine to start through the starter motor. During the start-up process, the intake and exhaust phases are the same as those in normal operation, and the cycle fuel injection volume and ignition energy generally increase. In conventional engines, CO, HC and other emissions are serious due to low temperature at start-up, poor mixture formation, etc. Diesel engines may not start reliably at low temperatures, so measures such as electric heating are generally required. [0003] Studies have shown that in urban traffic, when a car stops for a short time at ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01L9/04F02D13/02F02N11/00F01L9/20F01L9/40
Inventor 常思勤刘梁李子非
Owner NANJING UNIV OF SCI & TECH
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