CN213574411U

CN213574411U - Methanol extended-range engine

Info

Publication number: CN213574411U
Application number: CN202022558950.XU
Authority: CN
Inventors: 陈香玲; 徐美娟
Original assignee: Suzhou DSM Green Power Co Ltd
Current assignee: Suzhou DSM Green Power Co Ltd
Priority date: 2020-11-09
Filing date: 2020-11-09
Publication date: 2021-06-29
Anticipated expiration: 2030-11-09

Abstract

The utility model discloses a methyl alcohol increases form engine relates to vehicle technical field, aims at solving ordinary gasoline engine and is used for methyl alcohol to increase the journey, has the design surplus and the problem that cold start difficulty, working life are short. The technical scheme is characterized by comprising a methanol engine, a methanol fuel supply system and an ISG direct current generator connected to a flywheel of the methanol engine, wherein a torsional damper is connected between a generator shaft of the ISG direct current generator and the flywheel of the methanol engine; the inlet valve and the exhaust valve of the methanol engine are both provided with polytetrafluoroethylene anti-corrosion layers. Starting by adopting an ISG direct current generator in a reverse dragging mode, wherein the starting rotating speed is not lower than 2500 revolutions; the methanol engine only needs to design a rated constant-rotating-speed stable-power generation platform and does not need to design an idling low-speed working and high-speed working range platform, and the methanol extended-range engine eliminates a starter and a 12V generator, so that the structure of the engine is simplified, the cost and the weight are reduced, and the power density is improved; no additional gasoline fuel system is required to enhance cold start capability.

Description

Methanol extended-range engine

Technical Field

The utility model belongs to the technical field of the technique of vehicle and specifically relates to a methyl alcohol increases form engine.

Background

The conventional methanol engine is started by a starter, namely a 12V power supply supplies power to the starter, the starter rotates to drive the engine to rotate for ignition, a dual-fuel dual-oil-tank scheme is adopted, gasoline fuel is used during ignition starting, and the methanol fuel is automatically switched to after starting. The methanol engine is provided with a 12V generator which is in belt transmission with a crankshaft of the engine, and the engine rotates to drive the 12V generator to generate electricity for charging a 12V small battery of the whole vehicle.

The methanol fuel has higher ignition temperature, and in the cold starting process of the engine, because the air inlet temperature is low, the water temperature and the oil temperature of the engine are low, the temperature of the wall surface and the cylinder cover surface of the engine cylinder is low, the ignition energy for igniting the mixed gas is higher, the mixed gas is difficult to ignite, and the engine cannot be started smoothly. Therefore, the conventional methanol engine uses a single methanol fuel, the engine has the problem of difficult cold start, the cold start problem can be solved by adopting a dual-fuel dual-oil-tank scheme, but the whole vehicle needs to be provided with two sets of oil supply systems, the cost is high, and the structure is complex.

Because the methanol fuel has higher corrosion to metal, plastic and rubber parts, the service life of related parts in the engine, which are in contact with the methanol, is reduced.

The conventional extended range engine is the same as a common gasoline engine, has the functions of starting a starter and generating electricity by a 12V generator, and has the rotating speed of the engine from idle speed to 6000 rpm; however, the engine for range extension does not need low-speed operation and high-speed operation range platforms, so that the common gasoline engine for range extension has the problem of over-design, and further improvement is needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a methyl alcohol increases form engine, it has the effect that improves cold-start ability, improves engine corrosion resisting ability.

The above technical purpose of the present invention can be achieved by the following technical solutions:

a methanol extended-range engine comprises a methanol engine, a methanol fuel supply system and an ISG direct current generator connected to a methanol engine flywheel, wherein a torsional damper is connected between a generator shaft of the ISG direct current generator and the methanol engine flywheel; and polytetrafluoroethylene anti-corrosion layers are arranged at the air inlet valve and the air outlet valve of the methanol engine.

The utility model discloses further set up to: the reverse-dragging starting rotating speed of the ISG direct current generator is more than or equal to 2500 rpm.

The utility model discloses further set up to: the methanol fuel supply system comprises a methanol fuel tank, a methanol fuel pump and a methanol engine oil rail connected with the methanol fuel pump, and a methanol engine oil nozzle is mounted on the methanol engine oil rail.

The utility model discloses further set up to: the methanol fuel tank, the methanol engine oil rail and the methanol engine oil nozzle are all made of stainless steel materials.

The utility model discloses further set up to: the methanol engine is connected with an ECU, and the ISG direct current generator is connected with a GCU.

The utility model discloses further set up to: and the ECU is connected with the GCU through CAN for communication.

To sum up, the utility model discloses a beneficial technological effect does:

starting by adopting an ISG direct current generator in a reverse dragging mode, wherein the starting rotating speed is not lower than 2500 revolutions; the ISG direct current generator shaft is connected with a methanol engine flywheel through a torsional damper, and has a starting and power generation integrated function; the ISG direct current generator rotates to reversely drag the methanol engine to start without starting by a starting motor; the reverse dragging rotating speed can reach more than 2500rpm, and after the methanol engine is successfully started, the ISG direct current generator starts to generate electricity for supplying power to a drive motor of the extended range electric vehicle or charging a battery PACK; due to the fact that the reverse dragging rotating speed is high, the water temperature and the oil temperature of the methanol engine during cold starting are rapidly improved, and the problem that the methanol engine is difficult to cold start by using methanol fuel is solved. The whole vehicle can adopt a single M100 methanol fuel, and is provided with a methanol oil tank and a set of oil supply system; the system has simple integrated structure and low cost.

Drawings

FIG. 1 is an electrical wiring diagram of a methanol extended range engine;

fig. 2 is a schematic overall structure diagram of an embodiment of the present invention;

FIG. 3 is a schematic diagram for showing the structure of an intake valve and an exhaust valve;

fig. 4 is a schematic diagram for showing the structure of the methanol fuel supply system.

In the figure, 1, a methanol engine; 11. an intake valve; 12. an exhaust valve; 2. an ISG DC generator; 3. a methanol fuel tank; 31. a methanol fuel pump; 32. a methanol engine oil rail; 33. methanol engine fuel sprayer.

Detailed Description

The following detailed description of the preferred embodiments of the present invention will be provided in conjunction with the accompanying drawings, so as to enable those skilled in the art to more easily understand the advantages and features of the present invention, and thereby define the scope of the invention more clearly and clearly.

Referring to fig. 2 and fig. 3, for the utility model discloses a methanol extended range engine, including methanol engine 1, methanol fuel feed system and connect in the ISG dc generator 2 of 1 flywheel of methanol engine, methanol engine 1's machine oil adopts the special machine oil of methanol, ISG dc generator 2's anti-starting speed that drags is more than or equal to 2500 rpm. A torsional damper is connected between the generator shaft of the ISG direct current generator 2 and the flywheel of the methanol engine 1. Polytetrafluoroethylene anti-corrosion layers are arranged at the positions of an inlet valve 11 and an exhaust valve 12 of the methanol engine 1, so that the corrosion resistance of the methanol engine 1 is improved.

Referring to fig. 3 and 4, the methanol fuel supply system includes a methanol fuel tank 3, a methanol fuel pump 31, and a methanol engine fuel rail 32 connected to the methanol fuel pump 31, a methanol engine fuel nozzle 33 is mounted on the methanol engine fuel rail 32, and the methanol fuel tank 3, the methanol engine fuel rail 32, and the methanol engine fuel nozzle 33 are all made of stainless steel.

Referring to fig. 1 and 2, the methanol engine 1 is connected to an ECU, and the ISG dc generator 2 is connected to a GCU. The methanol version ECU is fixed on the methanol engine 1 through a support, a shaft of the ISG direct current generator 2 is connected on a flywheel of the methanol engine 1 through a torsional vibration damper, and the GCU controller box is fixed on the ISG direct current generator 2 and shares a water channel of the ISG direct current generator 2 for heat dissipation. And the ECU is connected with the GCU through CAN for communication. The GCU controls the ISG direct current generator 2 to be reversely dragged and started to 2500rpm, the methanol engine 1 starts to be started, M100 methanol fuel is input into the methanol engine 1 through the methanol fuel pump 31 to be combusted, the methanol engine 1 is pushed to rotate, chemical energy is converted into mechanical energy, the ISG direct current generator 2 is driven by the torsional damper to rotate to generate power, and electric energy is output to the driving motor or the battery to drive the electric automobile to run.

The implementation principle of the embodiment is as follows: starting by adopting an ISG direct current generator 2 in a reverse dragging mode, wherein the starting rotating speed is not lower than 2500 revolutions;

the methanol engine 1 only needs to design a rated constant-rotating-speed stable power generation platform, remove a starter and a 12V generator, design a rotating speed working point of 2500rpm/3000rpm/3500rpm/4000rpm, and does not need to design an idling low-speed working and high-speed working range platform, thereby simplifying the structure of the engine, reducing the cost and weight and improving the power density;

no additional gasoline fuel system is required to improve cold start capability; the methanol engine 1 is corrosion-resistant and has long service life.

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A methanol extended range engine is characterized in that: the methanol gasoline engine comprises a methanol engine (1), a methanol fuel supply system and an ISG direct current generator (2) connected to a flywheel of the methanol engine (1), wherein a torsional damper is connected between a generator shaft of the ISG direct current generator (2) and the flywheel of the methanol engine (1); and polytetrafluoroethylene anti-corrosion layers are arranged at the positions of an inlet valve (11) and an exhaust valve (12) of the methanol engine (1).

2. The methanol extended range engine of claim 1, wherein: the reverse-dragging starting rotating speed of the ISG direct current generator (2) is more than or equal to 2500 rpm.

3. The methanol extended range engine of claim 1, wherein: the methanol fuel supply system comprises a methanol fuel tank (3), a methanol fuel pump (31) and a methanol engine fuel rail (32) connected with the methanol fuel pump (31), wherein a methanol engine fuel nozzle (33) is mounted on the methanol engine fuel rail (32).

4. The methanol extended range engine of claim 3, wherein: the methanol fuel tank (3), the methanol engine oil rail (32) and the methanol engine oil nozzle (33) are all made of stainless steel.

5. The methanol extended range engine of claim 1, wherein: the methanol engine (1) is connected with an ECU, and the ISG direct current generator (2) is connected with a GCU.

6. The methanol extended range engine of claim 5, wherein: and the ECU is connected with the GCU through CAN for communication.