Engine system and vehicle

Abstract

The utility model discloses an engine system and a vehicle, the engine system comprises a heat recovery device, a generator, a storage battery and an electric heater, the heat recovery device comprises a circulation pipeline for a working medium to circularly flow, an evaporator and an expander are arranged on the circulation pipeline, and the evaporator is also arranged on an exhaust pipeline of an engine; the generator is in transmission connection with the expander, the storage battery is electrically connected with the generator, and the electric heater is arranged on an air inlet pipeline of the engine and electrically connected with the storage battery. According to the engine system provided by the invention, air inlet heating measures are configured for the engine in a more economical manner.

Description

Technical Field

[0001] The present application relates to the field of automobile technology, and in particular to an engine system and a vehicle. Background Art

[0002] In the cold start condition of the engine, in order to make the engine in a cold state reach a warm state as soon as possible, it is usually necessary to heat the engine intake air. The current heating measures are less economical. Therefore, how to configure a more economical intake air heating measure for the engine has become a technical problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0003] This application provides the following technical solutions:

[0004] An engine system, comprising:

[0005] The heat recovery device comprises a circulation pipeline for circulating the working medium, an evaporator and an expander are arranged on the circulation pipeline, and the evaporator is also arranged on the exhaust pipeline of the engine;

[0006] a generator, drivingly connected to the expander;

[0007] a battery, electrically connected to the generator;

[0008] The electric heater is electrically connected to the battery and arranged in the air intake pipeline of the engine.

[0009] Optionally, in the above engine system, the exhaust pipeline of the engine includes a turbine bypass pipeline, and the evaporator is arranged in the turbine bypass pipeline.

[0010] Optionally, in the above engine system, a liquid storage tank is provided on the circulation pipeline, and the liquid storage tank is located upstream of the evaporator.

[0011] Optionally, in the above engine system, the heat recovery device includes a pump located between the liquid storage tank and the evaporator.

[0012] Optionally, in the above engine system, a temperature sensor is provided at the input end of the expander for detecting the temperature of the working fluid entering the expander.

[0013] Optionally, in the above engine system, a flow sensor is provided at the input end of the expander for detecting the flow of the working medium entering the expander.

[0014] Optionally, in the above engine system, the generator is also drivingly connected to the crankshaft of the engine.

[0015] Optionally, in the above engine system, the electric heater is located on the intake pipe downstream of the intercooler and upstream of the intake manifold.

[0016] Optionally, in the above engine system, the heater is configured as a heating grid.

[0017] A vehicle comprises an engine system as disclosed in any one of the above items.

[0018] According to the above technical solution, in the engine system provided by the present application, the evaporator on the circulation pipeline of the heat recovery device is also arranged in the exhaust pipeline of the engine, and the expander on the circulation pipeline is connected to the generator in a transmission manner. The battery electrically connected to the generator can provide electricity for the electric heater arranged in the engine intake pipeline. With such a configuration, the waste heat of the exhaust gas can be converted into electrical energy and stored in advance. When the intake air of the engine needs to be heated, such as in cold start conditions, the electrical energy is converted into thermal energy by the electric heater for use. Such intake heating measures are conducive to saving energy and improving economy. It can be seen that the engine system provided by the present application is equipped with intake heating measures for the engine in a more economical way. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0020] Figure 1 It is a schematic diagram of the engine system provided in an embodiment of the present application.

[0021] The markings in the figure are:

[0022] 1. Compressor; 2. Intercooler; 3. Electric heater; 4. Intake manifold; 5. Cylinder; 6. Exhaust manifold; 7. Turbine; 8. Exhaust valve; 9. Evaporator; 10. Expander; 11. Condenser; 12. Liquid storage tank; 13. Pump; 14. Generator; 15. Battery; 16. Switch. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0024] See also Figure 1 An embodiment of the present application provides an engine system, including a heat recovery device, a generator 14, a battery 15 and an electric heater 3. The heat recovery device includes a circulation pipeline for circulating a working medium. An evaporator 9 and an expander 10 are arranged on the circulation pipeline. The evaporator 9 is also arranged in the exhaust pipeline of the engine. The generator 14 is transmission-connected to the expander 10. The battery 15 is electrically connected to the generator 14. The electric heater 3 is arranged in the intake pipeline of the engine and is electrically connected to the battery 15.

[0025] When the engine is working, the exhaust gas enters the exhaust pipe from the cylinder 5 through the exhaust manifold 6. The exhaust gas exchanges heat with the working fluid in the circulation pipe of the heat recovery device at the evaporator 9. The working fluid absorbs heat and becomes high-temperature gas. Then, it enters the expander 10 along the circulation pipe to perform work externally, driving the generator 14 to work. In this way, the heat energy recovered from the exhaust pipe is converted into electrical energy by the generator 14 and stored in the battery 15. The battery 15 can provide electricity to the electric heater 3, thereby heating the intake pipe of the engine. It can be seen that the engine system provided by the present application can convert the waste heat of the exhaust gas into electrical energy in advance and store it. When it is necessary to heat the intake air of the engine, such as in cold start conditions, the electrical energy is converted into thermal energy by the electric heater 3 for use, so that the intake heating measures have better economy.

[0026] like Figure 1 As shown, in a preferred embodiment, the exhaust pipeline of the engine includes a turbine bypass pipeline, and the evaporator 9 is arranged in the turbine bypass pipeline. The turbine bypass pipeline is to directly guide the exhaust gas before the turbine 7 into the pipeline after the turbine 7. The turbine bypass pipeline is generally provided with an exhaust valve 8. Specifically, the exhaust valve 8 can be a switch valve or a flow control valve. The position of the exhaust valve 8 on the turbine bypass pipeline is preferably set upstream of the evaporator 9. The turbine 7 is the turbine part of the turbocharger. The turbine 7 drives the compressor 1 to increase the intake pressure, and then the intake air reaches the intake manifold 4 of the engine along the intake pipeline through the intercooler 2. In this embodiment, the position of the electric heater 3 on the intake pipeline is located downstream of the intercooler 2 and upstream of the intake manifold 4. In other embodiments, the electric heater 3 can also be set at other positions of the intake pipeline or in the intake manifold 4, as long as the intake temperature entering the cylinder 5 can be increased.

[0027] like Figure 1 As shown, in this embodiment, a liquid storage tank 12 is provided on the circulation pipeline of the heat recovery device, and the liquid storage tank 12 is located upstream of the evaporator 9. After the working medium gas comes out of the expander 10, it enters the condenser 11 along the circulation pipeline. After the heat is dissipated by the condenser 11, the working medium becomes liquid and flows into the liquid storage tank 12. A pump 13 for providing working medium circulation power can be provided between the liquid storage tank 12 and the evaporator 9.

[0028] In a preferred embodiment, a temperature sensor is provided at the input end of the expander 10 for detecting the temperature of the working medium entering the expander 10. In addition, a flow sensor and a pressure sensor may be provided at the input end of the expander 10 for detecting the flow rate and pressure of the working medium entering the expander 10, respectively.

[0029] like Figure 1 As shown, in this embodiment, the generator 14 is also connected to the crankshaft of the engine, so that the running engine can be used to increase the power of the battery 15. The switch 16 on the circuit connecting the battery 15 and the electric heater 3 is generally arranged near the battery 15. There are many options for the structural form of the heater. In order to improve the heating efficiency of the heater, the heater can be set as a heating grid.

[0030] The present application also provides a vehicle, which includes the engine system disclosed in the above embodiment. Since the engine system disclosed in the above embodiment has the above technical effects, the vehicle having the engine system also has the above technical effects, which will not be described in detail herein.

[0031] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0032] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An engine system, characterized in that: include: The heat recovery device comprises a circulation pipeline for circulating the working medium, an evaporator and an expander are arranged on the circulation pipeline, and the evaporator is also arranged on the exhaust pipeline of the engine; a generator, drivingly connected to the expander; a battery, electrically connected to the generator; The electric heater is electrically connected to the battery and arranged in the air intake pipeline of the engine.

2. The engine system according to claim 1, characterized in that: The exhaust pipeline of the engine includes a turbine bypass pipeline, and the evaporator is arranged in the turbine bypass pipeline.

3. The engine system according to claim 1, characterized in that: The circulation pipeline is provided with a liquid storage tank, and the liquid storage tank is located upstream of the evaporator.

4. The engine system according to claim 3, characterized in that: The heat recovery device includes a pump located between the liquid storage tank and the evaporator.

5. The engine system according to claim 1, characterized in that: A temperature sensor is provided at the input end of the expander for detecting the temperature of the working fluid entering the expander.

6. The engine system according to claim 1, characterized in that: A flow sensor is provided at the input end of the expander for detecting the flow of the working medium entering the expander.

7. The engine system according to any one of claims 1 to 6, characterized in that: The generator is also drivingly connected to the crankshaft of the engine.

8. The engine system according to claim 7, characterized in that: The electric heater is located on the intake pipe downstream of the intercooler and upstream of the intake manifold.

9. The engine system according to claim 7, characterized in that: The heater is configured to heat the grid.

10. A vehicle, characterized in that: The invention comprises an engine system as claimed in any one of claims 1 to 9.

Images