engine starter

An engine starting and engine technology, which is applied to the starting of the engine, the power unit, the starting of the motor for the engine, etc. Effect

Active Publication Date: 2020-09-01
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is necessary to determine the starting method control before the engine is started, and a sensor for detecting water temperature, etc. as a judging means is required, and there is a problem that the engine starting device is complicated and expensive.

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0050] figure 1 It is a block diagram showing a schematic configuration of a vehicle equipped with the engine starting device according to Embodiment 1 of the present invention. exist figure 1 Among them, the engine 1 includes a function of judging engine stop or engine restart in automatic engine stop and restart control, and the engine 1 is controlled by an engine control device 5 for drive control. Hereinafter, the engine control device 5 is referred to as an engine ECU 5 .

[0051] A generator motor 2 is always connected to a crankshaft 11 of the engine 1 via a belt 12 . In addition, the pinion gear 31 serving as an output portion of the rotational torque of the starter 3 is detachably provided on the ring gear 13 integrated with the crankshaft 11 , and transmits rotational torque.

[0052] A power conversion device 21 is connected to the generator motor 2 . Furthermore, the power conversion device 21 is connected to the storage battery 4 and a generator motor control ...

Embodiment approach 2

[0091] In Embodiment 2 of the present invention, the function of the one-way clutch 33 of the starter 3 will be described.

[0092] In the above first embodiment, in the combined cranking, the generator motor 2 and the starter 3 crank the engine 1 at the same time, and each air cylinder of the engine 1 repeatedly performs the steps of intake→compression→expansion→exhaust. During the expansion stroke, the load becomes larger, and during the expansion stroke, the load becomes smaller. Therefore, fluctuations in which the cranking rotation speed repeatedly decreases and increases occur.

[0093] In addition, in the generator motor 2 connected to the crankshaft 11 by the belt 12 , the speed reduction ratio between the output shaft of the generator motor 2 and the crankshaft 11 of the engine 1 is about 2 to 3. In addition, the starter 3 detachably connected by gears has a reduction mechanism with a reduction ratio of about 4 to 6 inside the starter 3, and the reduction ratio of th...

Embodiment approach 3

[0112] In the above-mentioned second embodiment, the method of adjusting the idle torque of the one-way clutch 33 in order to suppress the rotation speed on the high rotation side of the cranking fluctuation was described, but in the third embodiment of the present invention, the method for obtaining and implementing A method of reducing the output torque of the generator motor 2 with the same effect as the method 2 will be described.

[0113] In addition, the configuration and the series of operations for starting the engine in Embodiment 3 are the same as those in Embodiment 1 described above. In addition, in the combined cranking according to Embodiment 3 of the present invention, it is characterized in that the output torque of the generator motor 2 is reduced from the initial stage to implement the cranking.

[0114] In conventional engine start-ups, extreme low temperatures such as -30°C were also taken into consideration, but output restrictions were seldom set for shor...

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Abstract

An engine starting device capable of ensuring engine startability with a simple structure and low cost by unifying the use method of a generator motor and a starter when starting an engine. The above-mentioned engine starting device includes: a generator motor connected to the crankshaft of the engine; Operation to start the engine The engine is combined cranked by both the generator motor and the starter during the initial start of the engine, and the engine is cranked by the generator motor during engine restart.

Description

technical field [0001] The present invention relates to an engine starting device. The engine starting device includes: a generator motor connected to the crankshaft of the engine; The starting device starts at least one of the generator motor and the starter to crank the engine. Background technique [0002] Conventionally, there is known a vehicle that performs automatic engine stop and restart control. The vehicle is equipped with a generator motor and a starter that crank the engine when the engine is started. In the above-mentioned engine automatic stop and restart control, When the engine stop condition is satisfied, the engine is automatically stopped, and then, when the restart condition is satisfied, the engine is restarted. [0003] In the above-mentioned vehicle, the generator motor and the starter are separately used, or the generator motor and the starter are used in combination, depending on the situation, to start the engine during cranking when the engine is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02N11/08F02N11/04F02N15/06
CPCF02N11/04F02N11/0803F02N11/0814F02N15/022F02N15/062B60K6/24B60K6/38B60K6/485B60W10/06B60W10/08B60W20/00F02D29/02F02N11/006F02N15/023F02N15/067F02N2300/2002F16D2041/0665
Inventor 金田直人龟井光一郎
Owner MITSUBISHI ELECTRIC CORP
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