Lashless Valvetrain with Engine Braking
Jacobs® Fulcrum Bridge and Jacobs® Spring Bridge Technologies enable the use of a hydraulic lash adjuster and an engine brake.
Hydraulic Lash Adjuster (HLA) technology is desirable on heavy-duty engines to eliminate the need to set and adjust lash as well as to optimize the cam design to enhance engine performance and efficiency. Conventional engine brakes and HLAs are incompatible because the HLA will over-extend during braking, causing possible valve-to-piston contact. Our lashless technologies apply a reactive load to the HLA during an engine braking event to prevent overextension.
Benefits
Enables the use of Hydraulic Lash Adjusters and a Jake Brake® Our lashless technologies enable the use of hydraulic lash adjusters and a Jacobs Engine Brake® providing a simple, cost-effective solution without compromise. A suite of solutions is available for any valvetrain.
Eliminate the need to adjust valve lash Eliminates the need to adjust valve lash, which is particularly important for natural gas and hydrogen applications
Optimization of hydraulic cam design for improved performance and efficiency A hydraulic cam design allows for optimization in the seating ramp areas which can lead to improvements in fuel economy and emissions. HLAs with Jacobs lashless technologies also allow for more consistent valve motions throughout all engine operating conditions.
Increases vehicle uptime with reduced maintenance time and cost for operators
Eliminating the need for setting lash in service will improve vehicle uptime for the operator, thereby improving the Total Cost of Ownership (TCO). This is especially important for applications where valvetrain access is challenging such as off-highway applications in dirty environments.
Cuts production time and cost at the manufacturer’s assembly line
Setting lash on the assembly line is often the bottleneck for engine production. This process is eliminated with the use of HLAs and the Jacobs Fulcrum or Spring Bridge.
Reduces noise, vibration, and harshness (NVH) with improved valve seating
HLAs allow for better control of the valve seating event, thereby reducing the NVH associated with the valvetrain.
Offers simple, cost-effective solutions without compromise
Jacobs lashless technologies such as Fulcrum Bridge or Spring Bridge are designed to work with conventional HLAs and various engine brake types.
Testing Fulcrum Bridge
Testing the Lashless Engine Brake with and without Fulcrum
How it Works
Learn how Fulcrum works in our Tech Talk series
Let's Connect
Get in touch with your customers to provide them with better service. You can modify the form fields to gather more precise information.