Safety control device of engine retarder

Abstract

The invention discloses a safety control device of an engine retarder. The safety control device comprises a power supply (1), a brake request switch (2), a signal processing switching device (4) and a solenoid valve (9) which are in series connected in sequence to form a closed circuit; and a throttle stroke signal device (3) and a rotation speed signal sensor (8) are connected with the signal processing switching device (4) respectively. The solenoid valve (9) is connected with an engine retarder actuating mechanism. The signal processing switching device (4) comprises a core part central processor (CPU) (5), an analog-digital converter (6) and a relay (7). The throttle stroke signal device (3) comprises an ejector rod (10), an insulation sleeve (11), a metal plate (12), a spring (13) and a guide wire (14). By virtue of the safety control device, the engine retarder is applied better and more reliably in practical driving, so that a car driver is guaranteed more safely.

Description

technical field [0001] The present invention relates to vehicle engine retarders. Background technique [0002] With the promulgation and implementation of national safety regulations, vehicle users pay more and more attention to the safe driving of vehicles, and the configuration of engine retarder is an important method to ensure safe braking during vehicle operation. At present, it has been widely used in medium and heavy trucks, buses and special vehicles. [0003] The main working principle of the engine retarder is to release the energy in the cylinder of the engine during the working process by opening the exhaust valve, so that the engine can perform negative work to achieve the purpose of braking the vehicle. This method is based on the normal output power of the engine cylinder. In order to meet the requirements of actual use, it is necessary to avoid interference in the control conversion of positive and negative energy. That is, if the engine of the vehicle is ...

AI Technical Summary

Problems solved by technology

That is, if the engine of the vehicle is in the idling condition and the speed is low, if the retarder is turned on to open the exhaust valve at this time, the working state in the idling cylinder will be unbalanced, causing the engine to stall; 1. Under the condition of downhill road, the engine needs to switch constantly under driving and braking conditions. When going downhill, use the retarder to brake the engine to make the engine go downhill at a steady speed, and when going uphill, it is necessary to immediately increase the fuel supply to output power. Forward, the braking state at this time will interfere with the required pressure in the cylinder to do work, resulting in the dangerous situation of slipping when the vehicle goes uphill

Images