Gasoline engine double-air-inlet large variable valve timing electric adjusting mechanism and control method thereof

A technology of valve phasing and adjustment mechanism, applied in engine control, machine/engine, mechanical equipment, etc., can solve the problem of reducing the total opening time of the intake valve, reducing the angle of delayed valve closing, and limited improvement of intake efficiency, etc. problems, to achieve the effect of reducing cost and control complexity, reducing downlink resistance and power consumption, and high effective power output

Active Publication Date: 2021-07-23
郁俊粉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, there are corresponding technical defects in the above technologies: as due to the limitation of the mechanical shape of the intake cam body, the valve mechanism will inevitably reduce the angle of the delayed closing of the valve while increasing the opening angle of the valve in advance, and the crankshaft angle at which the valve remains open. remains unchanged, but the total opening time of the intake valve will inevitably decrease with the increase of the speed, and the improveme

Method used

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  • Gasoline engine double-air-inlet large variable valve timing electric adjusting mechanism and control method thereof
  • Gasoline engine double-air-inlet large variable valve timing electric adjusting mechanism and control method thereof
  • Gasoline engine double-air-inlet large variable valve timing electric adjusting mechanism and control method thereof

Examples

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Example

[0069] Example 1: Assuming that the sun gear has 52 teeth number Z 3 =20, planetary gear 51 parameter Z 4 =18, then the number of teeth of the cylindrical gear 12 and the external ring gear 54 is desirable: Z 1 = 38, Z 2 =18+10=28, or Z 1 =19,Z 2 =14.

Example

[0070] Example 2: Assuming that the sun gear has 52 teeth number Z 3 =20, planetary gear 51 parameter Z 4 =16, then the number of teeth of the cylindrical gear 12 and the external ring gear 54 is desirable: Z 1 =36,Z 2 =16+10=26, or Z 1 =18, Z 2 =13.

[0071] 2) Transmission ratio i of the phase (rotation angle) between the worm 62 and the intake camshaft II2 涡.H The transmission ratio of sun gear 52 and planet carrier 53 is (outer gear is stationary):

[0072] i H.3 =2(z 3 +z 4 ) / z 3

[0073] Let the gear ratio of the worm gear be: i 涡

[0074] there is i 涡.H = i 涡 i H.3 .

[0075] 3) Phase adjustment method

[0076] Assuming that the intake camshaft II2 phase advance angle needs to be adjusted to θ°, then according to the design transmission ratio, the rotation angle command value of the stepper motor is:

[0077] δ 电机 = i 涡H θ°.

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Abstract

The invention relates to a gasoline engine double-air-inlet large variable valve timing electric adjusting mechanism and a control method thereof. The gasoline engine double-air-inlet large variable valve timing electric adjusting mechanism comprises an air inlet cam shaft I, an air inlet cam shaft II, an exhaust cam shaft, an engine crankshaft timing belt wheel, a planetary gear train, a worm and gear mechanism and a stepping motor; a timing belt wheel I is arranged on the air inlet cam shaft I, a timing belt wheel II is arranged on the exhaust cam shaft, the timing belt wheel I, the timing belt wheel II and the engine crankshaft timing belt wheel are connected and driven through a timing toothed belt, and the air inlet cam shaft I and the air inlet cam shaft II are connected and driven through the planetary gear train; and the worm and gear mechanism is arranged on one side of the planetary gear train and comprises one worm gear and one worm meshed with the worm gear, the worm gear is connected with and drives the planetary gear train, and the stepping motor is connected with and drives the worm. According to the gasoline engine double-air-inlet large variable valve timing electric adjusting mechanism and the control method thereof, the delay closing air inlet phase adjusting range is larger, and an electric adjusting mode convenient to control is adopted.

Description

【Technical field】 [0001] The invention relates to a composition mechanism of a gasoline engine, in particular to an electric adjustment mechanism of a gasoline engine with double air intake and large variable valve distribution phase and a control method thereof, belonging to the technical field of automobile drive systems. 【Background technique】 [0002] At present, the valve mechanism of high-speed gasoline engines for vehicles generally adopts dual intake valve, dual exhaust valve and dual camshaft mechanism. The intake valve and exhaust valve are respectively driven by their corresponding camshafts to open and close to complete the engine. Cylinder intake and exhaust requirements for proper operation. [0003] In order to improve the requirements of sufficient intake air and clean exhaust gas for high-speed engine operation and improve engine power, the valve train of mainstream engines is generally equipped with corresponding intake and exhaust phase adjustment mechanis...

Claims

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Application Information

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IPC IPC(8): F01L1/348F01L1/047F01L1/26F02D13/02
CPCF01L1/348F01L1/047F01L1/26F01L1/267F02D13/0234Y02T10/12
Inventor 解后循郁俊粉
Owner 郁俊粉
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